The R Project SVN – R-packages – Diff – /trunk/SQLiteDF/src/sqlite_vector.c


#include "sqlite_dataframe.h"
#include <math.h>
#include "Rmath.h"
 
/****************************************************************************
 * UTILITY FUNCTIONS
 ****************************************************************************/
char *_create_svector1(SEXP name, const char *type, int * _namelen, int protect) {
    int namelen, res;
    char *iname = _create_sdf_skeleton1(name, &namelen, protect);
 
    if (iname == NULL) return NULL;
 
    sprintf(g_sql_buf[2], "create table [%s].sdf_data ([row name] text, "
            "V1 %s, primary key ([row name]))", iname, type);
    res = _sqlite_exec(g_sql_buf[2]);
    _sqlite_error(res);
 
    if (_namelen != NULL) *_namelen = namelen;
    return iname;
}
 
SEXP _create_svector_sexp(const char *iname, const char *tblname,
        const char *varname, const char *type) {
    SEXP ret, value; int nprotected = 0;
    PROTECT(ret = NEW_LIST(3)); nprotected++;
 
    /* set list names */
    PROTECT(value = NEW_CHARACTER(3)); nprotected++;
    SET_STRING_ELT(value, 0, mkChar("iname"));
    SET_STRING_ELT(value, 1, mkChar("tblname"));
    SET_STRING_ELT(value, 2, mkChar("varname"));
    SET_NAMES(ret, value);
 
    /* set list values */
    SET_VECTOR_ELT(ret, 0, mkString(iname));
    SET_VECTOR_ELT(ret, 1, mkString(tblname));
    SET_VECTOR_ELT(ret, 2, mkString(varname));
 
    /* set sexp class */
    SET_CLASS(ret, mkString("sqlite.vector"));
 
    /* set sdf.vector.type */
    SET_SDFVECTORTYPE(ret, mkString(type));
 
    UNPROTECT(nprotected);
 
    return ret;
}
 
/* if ret == NULL, 3rd arg is the length of the vector created. otherwise
 * it is the index in the vector ret where we will put the result extracted
 * from ret */
int _get_vector_index_typed_result(sqlite3_stmt *stmt, SEXP *ret, int idx_or_len) {
    int added = 1;
    if (*ret == NULL || *ret == R_NilValue) {
        const char *coltype = sqlite3_column_decltype(stmt, 0);
        if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {
            added = 0;
        }
        
        if (strcmp(coltype, "text") == 0) {
            PROTECT(*ret = NEW_CHARACTER(idx_or_len));
            if (added) 
                SET_STRING_ELT(*ret, 0, mkChar((char *)sqlite3_column_text(stmt, 0)));
        } else if (strcmp(coltype, "double") == 0) {
            PROTECT(*ret = NEW_NUMERIC(idx_or_len));
            if (added) REAL(*ret)[0] = sqlite3_column_double(stmt, 0);
        } else if (strcmp(coltype, "bit") == 0) {
            PROTECT(*ret = NEW_LOGICAL(idx_or_len));
            if (added) INTEGER(*ret)[0] = sqlite3_column_int(stmt, 0);
        } else if (strcmp(coltype, "integer") == 0 || 
                   strcmp(coltype, "int") == 0) {
            /* caller should just copy off the vars level attr for factors */
            PROTECT(*ret = NEW_INTEGER(idx_or_len));
            if (added) INTEGER(*ret)[0] = sqlite3_column_int(stmt, 0);
        } else added = 0;
 
        UNPROTECT(1);
    } else if (stmt != NULL) {
        const char *coltype = sqlite3_column_decltype(stmt, 0);
        if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {
            added = 0;
        } else if (strcmp(coltype, "text") == 0) {
            SET_STRING_ELT(*ret, idx_or_len, 
                    mkChar((char *)sqlite3_column_text(stmt, 0)));
        } else if (strcmp(coltype, "double") == 0) {
            REAL(*ret)[idx_or_len] = sqlite3_column_double(stmt, 0);
        } else if (strcmp(coltype, "bit") == 0) {
            INTEGER(*ret)[idx_or_len] = sqlite3_column_int(stmt, 0);
        } else if (strcmp(coltype, "integer") == 0 ||
                   strcmp(coltype, "int") == 0) {
            /* caller should just copy off the vars level attr for factors */
            INTEGER(*ret)[idx_or_len] = sqlite3_column_int(stmt, 0);
        } else added = 0;
    } else if (stmt == NULL) {
        const char *coltype = sqlite3_column_decltype(stmt, 0);
        if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {
            added = 0;
        } else if (strcmp(coltype, "text") == 0) {
            SET_STRING_ELT(*ret, idx_or_len, NA_STRING);
        } else if (strcmp(coltype, "double") == 0) {
            REAL(*ret)[idx_or_len] = NA_REAL;
        } else if (strcmp(coltype, "bit") == 0 || strcmp(coltype, "integer") == 0 ||
                   strcmp(coltype, "int") == 0) {
            INTEGER(*ret)[idx_or_len] = NA_INTEGER;
        } else added = 0;
    }
        
    return added;
}
 
/****************************************************************************
 * SVEC FUNCTIONS
 ****************************************************************************/
SEXP sdf_get_variable(SEXP sdf, SEXP name) {
    char *iname, *varname, *svec_type = NULL;
    const char *coltype;
    int type = -1, res, nprotected = 0;
    SEXP ret, value;
 
    if (!IS_CHARACTER(name)) {
        error("argument is not a string.\n");
    }
 
    iname = SDF_INAME(sdf);
    varname = CHAR_ELT(name, 0);
 
    if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;
 
    /* check if sdf & varname w/in that sdf exists */
    sqlite3_stmt *stmt;
    sprintf(g_sql_buf[0], "select [%s] from [%s].sdf_data", varname, iname);
 
    res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
 
    if (_sqlite_error(res)) return R_NilValue;
 
    coltype = sqlite3_column_decltype(stmt, 0);
    sqlite3_finalize(stmt);
    
    PROTECT(ret = NEW_LIST(3)); nprotected++;
 
    /* set list names */
    PROTECT(value = NEW_CHARACTER(3)); nprotected++;
    SET_STRING_ELT(value, 0, mkChar("iname"));
    SET_STRING_ELT(value, 1, mkChar("tblname"));
    SET_STRING_ELT(value, 2, mkChar("varname"));
    SET_NAMES(ret, value);
 
    /* set list values */
    SET_VECTOR_ELT(ret, 0, mkString(iname));
    SET_VECTOR_ELT(ret, 1, mkString("sdf_data"));
    SET_VECTOR_ELT(ret, 2, mkString(varname));
 
    /* set class */
    if (strcmp(coltype, "text") == 0) svec_type = "character";
    else if (strcmp(coltype, "double") == 0) svec_type = "numeric";
    else if (strcmp(coltype, "bit") == 0) svec_type = "logical";
    else if (strcmp(coltype, "integer") == 0 || strcmp(coltype, "int") == 0) {
        /* determine if int, factor or ordered */
        type = _get_factor_levels1(iname, varname, ret);
        switch(type) {
            case VAR_INTEGER: svec_type = "integer"; break;
            case VAR_FACTOR: svec_type = "factor"; break;
            case VAR_ORDERED: svec_type = "ordered";
        }
 
    }
 
    SET_CLASS(ret, mkString("sqlite.vector"));
    SET_SDFVECTORTYPE(ret, mkString(svec_type));
 
    UNPROTECT(nprotected);
    return ret;
 
}
 
 
SEXP sdf_get_variable_length(SEXP svec) {
    char *iname = SDF_INAME(svec);
    if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;
 
    return ScalarInteger(_get_row_count2(iname, 1));
}
 
    
SEXP sdf_get_variable_index(SEXP svec, SEXP idx) {
    SEXP ret = R_NilValue, tmp;
    char *iname = SDF_INAME(svec), *tblname = SVEC_TBLNAME(svec),
         *varname = SVEC_VARNAME(svec);
    int index, idxlen, i, retlen=0, res;
    sqlite3_stmt *stmt;
 
    if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;
 
    idxlen = LENGTH(idx);
    if (idxlen < 1) return ret;
 
    sprintf(g_sql_buf[0], "select [%s] from [%s].[%s] limit ?,1",
            varname, iname, tblname);
    res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
    if (_sqlite_error(res)) error("cannot complete request");
 
    /* get data based on index */
    if (IS_NUMERIC(idx)) {
        index = ((int) REAL(idx)[0]) - 1;
        if (index < 0 && idxlen == 1) return ret;
 
        if (index >= 0) {
            sqlite3_bind_int(stmt, 1, index);
            res = sqlite3_step(stmt);
            if (res == SQLITE_ROW) { 
                retlen = _get_vector_index_typed_result(stmt, &ret, idxlen);
            } 
        } 
        
        if (index < 0 || res != SQLITE_ROW) {
            /* something wrong w/ 1st idx, and it is quietly ignored. we make 
             * a "dummy" call to setup the SEXP */
            sqlite3_reset(stmt);
            sqlite3_bind_int(stmt, 1, 0);
            res = sqlite3_step(stmt);
            if (res == SQLITE_ROW) {
                _get_vector_index_typed_result(stmt, &ret, idxlen - 1);
            }
            retlen = 0;
        }
 
 
        if (idxlen > 1) {
            for (i = 1; i < idxlen; i++) {
                index = ((int) REAL(idx)[i]) - 1;
                if (index < 0) continue;
                sqlite3_reset(stmt);
                sqlite3_bind_int(stmt, 1, index);
                res = sqlite3_step(stmt);
                if (res == SQLITE_ROW) {
                    retlen += _get_vector_index_typed_result(stmt, &ret, retlen); 
                } else {
                    retlen += _get_vector_index_typed_result(NULL, &ret, retlen); 
                }
            }
        }
    } else if (IS_INTEGER(idx)) {
        /* similar to REAL (IS_NUMERIC) above, except that we don't have
         * to cast idx to int. can't refactor this out, sucks. */
        index = INTEGER(idx)[0] - 1;
        if (index < 0 && idxlen == 1) return ret;
 
        if (index >= 0) {
            sqlite3_bind_int(stmt, 1, index);
            res = sqlite3_step(stmt);
            if (res == SQLITE_ROW) { 
                retlen = _get_vector_index_typed_result(stmt, &ret, idxlen);
            } 
        } 
        
        if (index < 0 || res != SQLITE_ROW) {
            /* something wrong w/ 1st idx, and it is quietly ignored. we make 
             * a "dummy" call to setup the SEXP */
            sqlite3_reset(stmt);
            sqlite3_bind_int(stmt, 1, 0);
            res = sqlite3_step(stmt);
            if (res == SQLITE_ROW) {
                _get_vector_index_typed_result(stmt, &ret, idxlen - 1);
            }
            retlen = 0;
        }
 
        if (idxlen > 1) {
            for (i = 1; i < idxlen; i++) {
                index = INTEGER(idx)[i] - 1;
                if (index < 0) continue;
                sqlite3_reset(stmt);
                sqlite3_bind_int(stmt, 1, index);
                res = sqlite3_step(stmt);
                if (res == SQLITE_ROW) {
                    retlen += _get_vector_index_typed_result(stmt, &ret, retlen); 
                } else {
                    retlen += _get_vector_index_typed_result(NULL, &ret, retlen);
                }
            }
        }
 
    } else if (IS_LOGICAL(idx)) {
        /* have to deal with recycling */
        int veclen = _get_row_count2(iname, 1);
 
        /* find if there is any TRUE element in the vector */
        for (i = 0; i < idxlen && i < veclen; i++) {
            if (LOGICAL(idx)[i]) {
                sqlite3_bind_int(stmt, 1, i);
                sqlite3_step(stmt);
                /* there are at least (idxlen-i) TRUE per cycle of the LOGICAL
                 * index. there are at least (veclen/idxlen) cycles (int div).
                 * at the last cycle, if (veclen%idxlen > 0), there will be
                 * at least (veclen%idxlen - i) if veclen%idxlen > i */
                retlen = (idxlen-i) * (veclen/idxlen);
                if (veclen%idxlen > i) retlen += (veclen%idxlen - i);
 
                /* create the vector */
                retlen = _get_vector_index_typed_result(stmt, &ret, retlen);
                break;
            }
        }
 
        if (i < idxlen && i < veclen) {
            for (i++; i < veclen; i++) {
                if (LOGICAL(idx)[i%idxlen]) {
                    sqlite3_reset(stmt);
                    sqlite3_bind_int(stmt, 1, i);
                    res = sqlite3_step(stmt);
                    if (res == SQLITE_ROW) {
                        retlen += _get_vector_index_typed_result(stmt, &ret, retlen);
                    } else {
                        retlen += _get_vector_index_typed_result(NULL, &ret, retlen);
                    }
                }
            }
        }
    }
 
    sqlite3_finalize(stmt);
 
    if (ret != R_NilValue) {
        ret = _shrink_vector(ret, retlen);
        tmp = GET_LEVELS(svec);
        if (tmp != R_NilValue) {
            SET_LEVELS(ret, duplicate(tmp));
            if (TEST_SDFVECTORTYPE(svec, "factor")) {
                SET_CLASS(ret, mkString("factor"));
            } else {
                PROTECT(tmp = NEW_CHARACTER(2));
                SET_STRING_ELT(tmp, 0, mkChar("ordered"));
                SET_STRING_ELT(tmp, 1, mkChar("factor"));
                UNPROTECT(1);
            }
        }
    }
 
    return ret;
}
 
/* sqlite.vector.[<- */
SEXP sdf_set_variable_index(SEXP svec, SEXP idx, SEXP value) {
    int idx_len, val_len;
 
    /* match levels if factor or ordered */
    if (inherits(value, "ordered")) {
    } else if (inherits(value, "factor")) {
    }
 
    idx_len = LENGTH(idx);
    val_len = LENGTH(value);
 
    if (IS_NUMERIC(idx)) {
    } else if (IS_INTEGER(idx)) {
    } else if (IS_LOGICAL(idx)) {
    }
 
    return R_NilValue;
}
 
SEXP sdf_variable_summary(SEXP svec, SEXP maxsum) {
    char *iname, *tblname, *varname, *type;
    sqlite3_stmt *stmt;
    int nprotected = 0;
    SEXP ret, names;
 
    iname = SDF_INAME(svec);
    tblname = SVEC_TBLNAME(svec);
    varname = SVEC_VARNAME(svec);
    USE_SDF1(iname, TRUE, FALSE);
 
    if ((TEST_SDFVECTORTYPE(svec, "ordered") && ((type = "ordered"))) ||
            (TEST_SDFVECTORTYPE(svec, "factor") && ((type = "factor")))) {
        int nrows, i, max_rows = INTEGER(maxsum)[0];
 
 
        sprintf(g_sql_buf[0], "[%s].[%s %s]", iname, type, varname);
        nrows = _get_row_count2(g_sql_buf[0], FALSE);
        if (nrows <= max_rows) max_rows = nrows;
        else { nrows = max_rows; max_rows--; }
 
        PROTECT(ret = NEW_INTEGER(nrows)); nprotected = 1;
        PROTECT(names = NEW_CHARACTER(nrows)); nprotected++;
 
        sprintf(g_sql_buf[0], "select [%s].[%s %s].label, count(*) from "
                "[%s].[%s] join [%s].[%s %s] on [%s].[%s].[%s]=[%s].[%s %s].level "
                "group by [%s].[%s].[%s], [%s].[%s %s].level order by count(*) desc",
                iname, type, varname, iname, tblname, iname, type, varname, iname, tblname, varname,
                iname, type, varname, iname, tblname, varname, iname, type, varname);
        sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
 
        for (i = 0; i < max_rows; i++) {
            sqlite3_step(stmt);
            SET_STRING_ELT(names, i, mkChar((char *)sqlite3_column_text(stmt, 0)));
            INTEGER(ret)[i] = sqlite3_column_int(stmt, 1);
        }
 
        if (nrows > max_rows) {
            int others_sum = 0;
            SET_STRING_ELT(names, nrows-1, mkChar("(Others)"));
            while (sqlite3_step(stmt) == SQLITE_ROW) {
                others_sum += sqlite3_column_int(stmt, 1);
            }
            INTEGER(ret)[nrows-1] = others_sum;
        }
    } else if (TEST_SDFVECTORTYPE(svec, "logical")) {
        sprintf(g_sql_buf[0], "select count(*) from "
                "[%s].[%s] group by [%s] order by [%s]", iname, tblname, varname, varname);
 
        PROTECT(names = NEW_CHARACTER(3)); nprotected = 1;
        PROTECT(ret = NEW_CHARACTER(3)); nprotected++;
 
        SET_STRING_ELT(names, 0, mkChar("Mode"));
        SET_STRING_ELT(names, 1, mkChar("FALSE"));
        SET_STRING_ELT(names, 2, mkChar("TRUE"));
 
        sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
        SET_STRING_ELT(ret, 0, mkChar("logical"));
        sqlite3_step(stmt);
        SET_STRING_ELT(ret, 1, mkChar((const char *)sqlite3_column_text(stmt, 0)));
        sqlite3_step(stmt);
        SET_STRING_ELT(ret, 2, mkChar((const char *)sqlite3_column_text(stmt, 0)));
 
    } else return R_NilValue;
 
    sqlite3_finalize(stmt);
    SET_NAMES(ret, names);
    SET_CLASS(ret, mkString("table"));
    UNPROTECT(nprotected);
    return ret;
}
            
 
/* the global accumulator should be safe if we only do 1 cummulative or
 * aggregate at any time. it won't work for stuffs like "select max(col)-min(col)
 * from sdf_data". */
static long double g_accumulator = 0.0; /* accumulator var for cumsum, cumprod, etc. */
static int g_start = 0;            /* flag for start of cummulation */
static int g_narm = 0;             /* for Summary group */
 
void _init_sqlite_function_accumulator() {
    g_accumulator = 0.0;   /* initialize accumulator */
    g_start = 1;           /* flag that we are at start of accumulating */
}
 
SEXP sdf_do_variable_math(SEXP func, SEXP vector, SEXP other_args) {
    char *iname, *iname_src, *varname_src, *funcname;
    int namelen, res;
    sqlite3_stmt *stmt;
 
    /* get data from arguments (function name and sqlite.vector stuffs) */
    funcname = CHAR_ELT(func, 0);
    iname_src = SDF_INAME(vector);
    varname_src = SVEC_VARNAME(vector);
 
    if (!USE_SDF1(iname_src, TRUE, TRUE)) return R_NilValue;
 
    /* create a new sdf, with 1 column named V1 */
    iname = _create_svector1(R_NilValue, "double", &namelen, TRUE);
 
    /* insert into <newsdf>.col, row.names select func(col), rownames */
    if (strcmp(funcname, "round") == 0 || strcmp(funcname, "signif") == 0) {
        double digits = REAL(_getListElement(other_args, "digits"))[0];
        sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "
                "select [row name], %s([%s],?) from [%s].sdf_data", iname, funcname,
                varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0); 
        if (_sqlite_error(res)) goto vecmath_prepare_error;
        res = sqlite3_bind_double(stmt, 1, digits);
    } else if (strcmp(funcname, "log") == 0) {
        double base = REAL(_getListElement(other_args, "base"))[0];
        sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "
                "select [row name], %s([%s],?) from [%s].sdf_data", iname, funcname,
                varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0); 
        if (_sqlite_error(res)) goto vecmath_prepare_error;
        res = sqlite3_bind_double(stmt, 1, base);
    } else {
        sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "
                "select [row name], %s([%s]) from [%s].sdf_data", iname, funcname,
                varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0); 
    }
 
    if (_sqlite_error(res)) {
vecmath_prepare_error:
        sprintf(g_sql_buf[0], "detach %s", iname);
        _sqlite_exec(g_sql_buf[0]);
 
        /* we will return a string with the file name, and do file.remove
         * at R */
        iname[namelen] = '.';
        return mkString(iname);
    }
 
    _init_sqlite_function_accumulator();
    sqlite3_step(stmt);
    sqlite3_finalize(stmt);
 
    UNUSE_SDF2(iname);
    UNUSE_SDF2(iname_src);
 
    return _create_svector_sexp(iname, "sdf_data", "V1", "numeric");
}
 
SEXP sdf_do_variable_op(SEXP func, SEXP vector, SEXP op2, SEXP arg_reversed) {
    char *iname = NULL, *iname_src, *varname_src, *funcname;
    int res, functype = -1, op2_len, svec_len, i, reversed;
    sqlite3_stmt *stmt, *stmt2;
 
    /* get data from arguments (function name and sqlite.vector stuffs) */
    funcname = CHAR_ELT(func, 0);
    iname_src = SDF_INAME(vector);
    varname_src = SVEC_VARNAME(vector);
    reversed = LOGICAL(arg_reversed)[0];
 
    if (!USE_SDF1(iname_src, TRUE, TRUE)) return R_NilValue;
    switch(funcname[0]) {
        case '+' :
        case '-' :
        case '*' :
        case '/' :
        case '^' :
        case '%' : /* %% and %/% */ 
            functype = 0; break;  /* output is REAL */
        case '&' :
        case '|' :
        case '!' :  /* ! and != */
            if (funcname[1] == 0) { functype = 1; break; }
        case '=' :  /* == */
        case '<' :  /* < and <= */
        case '>' :  /* > and >= */
            functype = 2; 
    }
 
    svec_len = _get_row_count2(iname_src, 1);
    if (functype == 0 || functype == 2 || (functype == 1 && funcname[0] != '!')) {
        char *insert_fmt_string1c, *insert_fmt_string1s;
        char *insert_fmt_string2c, *insert_fmt_string2s;
        int vec_idx, sdf_idx;
 
        iname = _create_svector1(R_NilValue, (functype == 0) ? "double" : "bit", NULL, TRUE);
 
        /* insert_fmt_string prefixes:
         * 1 - op2 is an ordinary vector, op2_len = 1, straightforward insert-select
         * 2 - op2 is an ordinary vector, op2_len > 1, may need recycling, loop both sides
         * s - operator will be printed as string
         * c - operator is either INTDIV or RMOD (int division, R modulo). initially, I
         *     thought I could cast both op to int then use / and % of sqlite, which is just
         *     the 2nd character of the funcname. however, R's INTDIV and casts to int 
         *     after division (e.g. 3.5 %/% 1.5 == 2). RMOD operates on doubles too,
         *     which is the remainder of the largest int multiple of "divisor"
         *     (e.g. 3.5 %% 1.5 = 0.5)
         */ 
        if (functype == 1) { /* boolean binary operators */
            if (!reversed) {
                insert_fmt_string1s = "insert into [%s].sdf_data "
                            "select [row name], ([%s] != 0) %s (? != 0) from [%s].sdf_data";
            } else {
                insert_fmt_string1s = "insert into [%s].sdf_data "
                            "select [row name], (? != 0) %s ([%s] != 0) from [%s].sdf_data";
            }
            insert_fmt_string2s = "insert into [%s].sdf_data values(?, (? != 0) %s (? != 0))";
            /* no need for char version of fmt_string2, since %% only occurs for functype==0 */
            insert_fmt_string1c = insert_fmt_string1s;
            insert_fmt_string2c = insert_fmt_string2s;
        } else {
            if (!reversed) {
                insert_fmt_string1s = "insert into [%s].sdf_data "
                            "select [row name], [%s] %s ? from [%s].sdf_data";
                insert_fmt_string1c = "insert into [%s].sdf_data "
                            "select [row name], %s([%s],?) from [%s].sdf_data";
            } else {
                insert_fmt_string1s = "insert into [%s].sdf_data "
                            "select [row name], ? %s [%s] from [%s].sdf_data";
                insert_fmt_string1c = "insert into [%s].sdf_data "
                            "select [row name], %s(?,[%s]) from [%s].sdf_data";
            }
            /* fmt_string2c format operator from a char, used for %% and %/% */
            insert_fmt_string2c = "insert into [%s].sdf_data values(?, %s(?,?))";
            insert_fmt_string2s = "insert into [%s].sdf_data values(?, ? %s ?)";
        }
 
        /* for 2* insert statements, the values below specifies the index of bind().
         * if !reversed, then e1 is svec, e2 is anything. otherwise, e2 is the svec */
        if (reversed) { sdf_idx = 3; vec_idx = 2; }
        else { sdf_idx = 2; vec_idx = 3; }
 
        if (IS_NUMERIC(op2)) {
            op2_len = LENGTH(op2);
 
            if (op2_len == 1) {
                if (funcname[0] == '%') {
                    sprintf(g_sql_buf[2], insert_fmt_string1c, iname, 
                            (funcname[1] == '%') ? "r_mod" : "r_intdiv", varname_src, iname_src);
                } else {
                    sprintf(g_sql_buf[2], insert_fmt_string1s, iname,
                            varname_src, funcname, iname_src);
                }
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
                sqlite3_bind_double(stmt, 1, REAL(op2)[0]);
                sqlite3_step(stmt);
                sqlite3_finalize(stmt);
            } else if (op2_len <= svec_len) {  /* recycle op2 */
                sprintf(g_sql_buf[2], "select [row name], [%s] from [%s].sdf_data",
                        varname_src, iname_src);
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
                _sqlite_error(res);
 
                if (funcname[0] == '%') {
                    sprintf(g_sql_buf[2], insert_fmt_string2c, iname, 
                            (funcname[1] == '%') ? "r_mod" : "r_intdiv");  
                    _sqlite_begin;
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
 
                    for (i = 0; i < svec_len; i++) {
                        sqlite3_step(stmt2);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_text(stmt, 1, (char *)sqlite3_column_text(stmt2, 0), -1, SQLITE_STATIC);
                        sqlite3_bind_int(stmt, sdf_idx, (int)sqlite3_column_double(stmt2, 1));
                        sqlite3_bind_int(stmt, vec_idx, (int)REAL(op2)[i % op2_len]);
                        sqlite3_step(stmt);
                    }
                    sqlite3_finalize(stmt);
                    sqlite3_finalize(stmt2);
                    _sqlite_commit;
                } else { /* non-integer binary operation */
                    sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                    _sqlite_begin;
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
 
                    for (i = 0; i < svec_len; i++) {
                        sqlite3_step(stmt2);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_text(stmt, 1, (char *)sqlite3_column_text(stmt2, 0), -1, SQLITE_STATIC);
                        sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 1));
                        sqlite3_bind_double(stmt, vec_idx, REAL(op2)[i % op2_len]);
                        sqlite3_step(stmt);
                    }
                    sqlite3_finalize(stmt);
                    sqlite3_finalize(stmt2);
                    _sqlite_commit;
                }
            } else { /* op2_len > svec_len, recycle svec */
                sprintf(g_sql_buf[1], "select [%s] from [%s].sdf_data",
                        varname_src, iname_src);
 
                if (funcname[0] == '%') {
                    sprintf(g_sql_buf[2], insert_fmt_string2c, iname, 
                            (funcname[1] == '%') ? "r_mod" : "r_intdiv");
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
                } else {
                    sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
                }
 
                i = 0; _sqlite_begin;
                while (i < op2_len) {
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
                    _sqlite_error(res);
 
                    if (funcname[0] == '%') {
                        for ( ; i < op2_len && sqlite3_step(stmt) == SQLITE_ROW ; i++) {
                            sqlite3_step(stmt2);
 
                            sqlite3_reset(stmt);
                            /* simplify my life, just use ints for row names so that we
                             * don't have to worry about duplicates */
                            sqlite3_bind_int(stmt, 1, i); 
                            sqlite3_bind_int(stmt, sdf_idx, sqlite3_column_int(stmt2, 1));
                            sqlite3_bind_int(stmt, vec_idx, (int)REAL(op2)[i % op2_len]);
                            sqlite3_step(stmt);
                        }
                    } else {
                        for ( ; i < op2_len && sqlite3_step(stmt) == SQLITE_ROW ; i++) {
                            sqlite3_step(stmt2);
 
                            sqlite3_reset(stmt);
                            sqlite3_bind_int(stmt, 1, i);
                            sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 1));
                            sqlite3_bind_double(stmt, vec_idx, REAL(op2)[i % op2_len]);
                            sqlite3_step(stmt);
                        }
                    }
 
                    /* recycle on svec if we loop again */
                    sqlite3_finalize(stmt2);
                }
 
                sqlite3_finalize(stmt);
                _sqlite_commit;
            }
 
        } else if (IS_INTEGER(op2) || IS_LOGICAL(op2)) { /* I N T E G E R */
            /* we are taking advantage of the fact that logicals are stored as int.
             * if this becomes untrue in the future, then this is a bug */
            /* we are binding double because ___ (?) */
            op2_len = LENGTH(op2);
 
            if (op2_len == 1) {
                if (funcname[0] == '%') {
                    sprintf(g_sql_buf[2], insert_fmt_string1c, iname, 
                            varname_src, (funcname[1] == '%') ? "r_mod" : "r_intdiv", iname_src);
                } else {
                    sprintf(g_sql_buf[2], insert_fmt_string1s, iname,
                            varname_src, funcname, iname_src);
                }
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
                sqlite3_bind_double(stmt, 1, (double)INTEGER(op2)[0]);
                sqlite3_step(stmt);
            } else if (op2_len <= svec_len) {
                sprintf(g_sql_buf[2], "select [row name], [%s] from [%s].sdf_data",
                        varname_src, iname_src);
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
                _sqlite_error(res);
 
                if (funcname[0] == '%') {
                    sprintf(g_sql_buf[2], insert_fmt_string2c, iname, 
                            (funcname[1] == '%') ? "r_mod" : "r_intdiv");
                    _sqlite_begin;
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
 
                    for (i = 0; i < svec_len; i++) {
                        sqlite3_step(stmt2);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_text(stmt, 1, (char *)sqlite3_column_text(stmt2, 0), -1, SQLITE_STATIC);
                        sqlite3_bind_int(stmt, sdf_idx, sqlite3_column_int(stmt2, 1));
                        sqlite3_bind_int(stmt, vec_idx, INTEGER(op2)[i % op2_len]);
                        sqlite3_step(stmt);
                    }
                    sqlite3_finalize(stmt);
                    sqlite3_finalize(stmt2);
                    _sqlite_commit;
                } else {
                    sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                    _sqlite_begin;
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
 
                    for (i = 0; i < svec_len; i++) {
                        sqlite3_step(stmt2);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_text(stmt, 1, (char *)sqlite3_column_text(stmt2, 0), -1, SQLITE_STATIC);
                        sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 1));
                        sqlite3_bind_double(stmt, vec_idx, (double)INTEGER(op2)[i % op2_len]);
                        sqlite3_step(stmt);
                    }
                    sqlite3_finalize(stmt);
                    sqlite3_finalize(stmt2);
                    _sqlite_commit;
                }
            } else {
                sprintf(g_sql_buf[1], "select [%s] from [%s].sdf_data",
                        varname_src, iname_src);
 
                if (funcname[0] == '%') {
                    sprintf(g_sql_buf[2], insert_fmt_string2c, iname,
                            (funcname[1] == '%') ? "r_mod" : "r_intdiv");
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
                } else {
                    sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                    _sqlite_error(res);
                }
               
                i = 0; _sqlite_begin; 
                while (i < op2_len) {
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
                    _sqlite_error(res);
 
                    if (funcname[0] == '%') {
                        for ( ; i < op2_len && sqlite3_step(stmt) == SQLITE_ROW ; i++) {
                            sqlite3_step(stmt2);
 
                            sqlite3_reset(stmt);
                            /* simplify my life, just use ints for row names so that we
                             * don't have to worry about duplicates */
                            sqlite3_bind_int(stmt, 1, i); 
                            sqlite3_bind_int(stmt, sdf_idx, sqlite3_column_int(stmt2, 1));
                            sqlite3_bind_int(stmt, vec_idx, INTEGER(op2)[i % op2_len]);
                            sqlite3_step(stmt);
                        }
                    } else {
                        for ( ; i < op2_len && sqlite3_step(stmt) == SQLITE_ROW ; i++) {
                            sqlite3_step(stmt2);
 
                            sqlite3_reset(stmt);
                            sqlite3_bind_int(stmt, 1, i);
                            sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 1));
                            sqlite3_bind_double(stmt, vec_idx, (double)INTEGER(op2)[i % op2_len]);
                            sqlite3_step(stmt);
                        }
                    }
 
                    /* recycle on svec if we loop again */
                    sqlite3_finalize(stmt2);
                }
                sqlite3_finalize(stmt);
                _sqlite_commit;
            }
 
        } else if (IS_CHARACTER(op2)) {
            if (functype != 2) error("not supported");
 
            op2_len = LENGTH(op2);
 
            if (op2_len == 1) {
                sprintf(g_sql_buf[2], insert_fmt_string1s, iname,
                            varname_src, funcname, iname_src);
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
                sqlite3_bind_text(stmt, 1, CHAR_ELT(op2, 0), -1, SQLITE_STATIC);
                sqlite3_step(stmt);
            } else if (op2_len <= svec_len) {
                sprintf(g_sql_buf[2], "select [row name], [%s] from [%s].sdf_data",
                        varname_src, iname_src);
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
                _sqlite_error(res);
 
                sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                _sqlite_begin;
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
 
                for (i = 0; i < svec_len; i++) {
                    sqlite3_step(stmt2);
 
                    sqlite3_reset(stmt);
                    sqlite3_bind_text(stmt, 1, (char *)sqlite3_column_text(stmt2, 0), -1, SQLITE_STATIC);
                    sqlite3_bind_text(stmt, sdf_idx, (char *)sqlite3_column_text(stmt2, 1), -1, SQLITE_STATIC);
                    sqlite3_bind_text(stmt, vec_idx, CHAR_ELT(op2, i % op2_len), -1 , SQLITE_STATIC);
                    sqlite3_step(stmt);
                }
                sqlite3_finalize(stmt2);
                _sqlite_commit;
            } else {
                sprintf(g_sql_buf[1], "select [%s] from [%s].sdf_data",
                        varname_src, iname_src);
 
                sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
               
                i = 0; _sqlite_begin; 
                while (i < op2_len) {
                    res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
                    _sqlite_error(res);
 
                    for ( ; i < op2_len && sqlite3_step(stmt) == SQLITE_ROW ; i++) {
                        sqlite3_step(stmt2);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_int(stmt, 1, i);
                        sqlite3_bind_text(stmt, sdf_idx, (char *)sqlite3_column_text(stmt2, 1), -1, SQLITE_STATIC);
                        sqlite3_bind_text(stmt, vec_idx, CHAR_ELT(op2, i % op2_len), -1 , SQLITE_STATIC);
                        sqlite3_step(stmt);
                    }
 
                    /* recycle on svec if we loop again */
                    sqlite3_finalize(stmt2);
                }
                sqlite3_finalize(stmt);
                _sqlite_commit;
            }
        
        } else if (inherits(op2, "sqlite.vector")) { 
            /* op2 is surely not a factor, as handled by the R wrapper */
            /* even though it is impossible for reversed to be FALSE, still use
             * sdf_idx and vec_idx so that code would be less confusing */
            char *iname_op2, *varname_op2;
            sqlite3_stmt *stmt3;
            iname_op2 = SDF_INAME(op2);
            varname_op2 = SVEC_VARNAME(op2);
 
            if (!USE_SDF1(iname_op2, TRUE, TRUE)) {
                /* delete created sqlite.vector */
                warning("detaching created result SDF %s\n", iname);
                sdf_detach_sdf(mkString(iname));
                return R_NilValue;
            }
            _sqlite_begin;
 
            op2_len = _get_row_count2(iname_op2, 1);
            
            sprintf(g_sql_buf[2], "select [%s] from [%s].sdf_data", varname_src, iname_src);
            res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt2, 0);
            _sqlite_error(res);
 
            sprintf(g_sql_buf[2], "select [%s] from [%s].sdf_data", varname_op2, iname_op2);
            res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt3, 0);
            _sqlite_error(res);
 
            if (funcname[0] == '%') {
                sprintf(g_sql_buf[2], insert_fmt_string2c, iname,
                            (funcname[1] == '%') ? "r_mod" : "r_intdiv");
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
 
                if (svec_len == op2_len) {
                    for (i = 0; i < svec_len; i++) {
                        sqlite3_step(stmt2); sqlite3_step(stmt3);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_int(stmt, 1, i);
                        sqlite3_bind_int(stmt, sdf_idx, sqlite3_column_int(stmt2, 0));
                        sqlite3_bind_int(stmt, vec_idx, sqlite3_column_int(stmt3, 0));
                        sqlite3_step(stmt);
                    }
                } else if (svec_len < op2_len) {
                    i = 0;
                    while (i < op2_len) {
                        for ( ; sqlite3_step(stmt2) == SQLITE_ROW && i < op2_len; i++) {
                            sqlite3_step(stmt3);
 
                            sqlite3_reset(stmt);
                            sqlite3_bind_int(stmt, 1, i);
                            sqlite3_bind_int(stmt, sdf_idx, sqlite3_column_int(stmt2, 0));
                            sqlite3_bind_int(stmt, vec_idx, sqlite3_column_int(stmt3, 0));
                            sqlite3_step(stmt);
                        }
                        sqlite3_reset(stmt2);
                    }
                } else {
                    i = 0;
                    while (i < svec_len) {
                        for ( ; sqlite3_step(stmt3) == SQLITE_ROW && i < svec_len; i++) {
                            sqlite3_step(stmt2);
 
                            sqlite3_reset(stmt);
                            sqlite3_bind_int(stmt, 1, i);
                            sqlite3_bind_int(stmt, sdf_idx, sqlite3_column_int(stmt2, 0));
                            sqlite3_bind_int(stmt, vec_idx, sqlite3_column_int(stmt3, 0));
                            sqlite3_step(stmt);
                        }
                        sqlite3_reset(stmt3);
                    }
                }
                _sqlite_commit;
            } else { /* not an integer op %% or %/% */
                sprintf(g_sql_buf[2], insert_fmt_string2s, iname, funcname);
                res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
                _sqlite_error(res);
 
                if (svec_len == op2_len) {
                    for (i = 0; i < svec_len; i++) {
                        sqlite3_step(stmt2); sqlite3_step(stmt3);
 
                        sqlite3_reset(stmt);
                        sqlite3_bind_int(stmt, 1, i);
                        sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 0));
                        sqlite3_bind_double(stmt, vec_idx, sqlite3_column_double(stmt3, 0));
                        sqlite3_step(stmt);
                    }
                } else if (svec_len < op2_len) { /* recycle svec */
                    i = 0;
                    while (i < op2_len) {
                        for ( ; sqlite3_step(stmt2) == SQLITE_ROW && i < op2_len; i++) {
                            sqlite3_step(stmt3);
 
                            sqlite3_reset(stmt);
                            sqlite3_bind_int(stmt, 1, i);
                            sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 0));
                            sqlite3_bind_double(stmt, vec_idx, sqlite3_column_double(stmt3, 0));
                            sqlite3_step(stmt);
                        }
                        sqlite3_reset(stmt2);
                    }
                } else { /* svec_len > op2_len, recycle op2 */
                    i = 0;
                    while (i < svec_len) {
                        for ( ; sqlite3_step(stmt3) == SQLITE_ROW && i < svec_len; i++) {
                            sqlite3_step(stmt2);
 
                            sqlite3_reset(stmt);
                            sqlite3_bind_int(stmt, 1, i);
                            sqlite3_bind_double(stmt, sdf_idx, sqlite3_column_double(stmt2, 0));
                            sqlite3_bind_double(stmt, vec_idx, sqlite3_column_double(stmt3, 0));
                            sqlite3_step(stmt);
                        }
                        sqlite3_reset(stmt3);
                    }
                }
            }
 
            sqlite3_finalize(stmt);
            sqlite3_finalize(stmt2);
            sqlite3_finalize(stmt3);
            _sqlite_commit;
 
            UNUSE_SDF2(iname_op2);
        }
    } else if (functype == 1 && funcname[0] != '!') { /* unary not operator */
        iname = _create_svector1(R_NilValue, "bit", NULL, TRUE);
        sprintf(g_sql_buf[2], "insert into [%s].sdf_data "
                    "select [row name], [%s] == 0 from [%s].sdf_data", 
                    iname, varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[2], -1, &stmt, 0);
        _sqlite_error(res);
        sqlite3_step(stmt);
        sqlite3_finalize(stmt);
    }
 
    if (iname != NULL) {
        return _create_svector_sexp(iname, "sdf_data", "V1", 
                (functype == 0) ? "numeric" : "logical");
        UNUSE_SDF2(iname);
    }
 
    UNUSE_SDF2(iname_src);
 
    return R_NilValue;
 
}
 
SEXP sdf_do_variable_summary(SEXP func, SEXP vector, SEXP na_rm) {
    char *iname_src, *varname_src, *funcname;
    int res;
    sqlite3_stmt *stmt;
    double _ret = NA_REAL; SEXP ret;
 
    /* get data from arguments (function name and sqlite.vector stuffs) */
    funcname = CHAR_ELT(func, 0);
    iname_src = SDF_INAME(vector);
    varname_src = SVEC_VARNAME(vector);
 
    if (!USE_SDF1(iname_src, TRUE, FALSE)) return R_NilValue;
 
    g_narm = LOGICAL(na_rm)[0];
    if (strcmp(funcname, "range") == 0) {
        /* special handling for range. use min then max */
        _init_sqlite_function_accumulator();
        sprintf(g_sql_buf[0], "select min_df([%s]) from [%s].sdf_data", varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, NULL);
        if (_sqlite_error(res)) return R_NilValue;
        sqlite3_step(stmt); sqlite3_finalize(stmt);
        _ret = g_accumulator;
 
        if (R_IsNA(_ret) && !g_narm) {
            PROTECT(ret = NEW_NUMERIC(2));
            REAL(ret)[0] = REAL(ret)[1] = R_NaReal;
            goto __sdf_do_variable_summary_out;
        }
        
        _init_sqlite_function_accumulator();
        sprintf(g_sql_buf[0], "select max_df([%s]) from [%s].sdf_data", varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, NULL);
        if (_sqlite_error(res)) return R_NilValue;
        sqlite3_step(stmt); sqlite3_finalize(stmt);
 
        /* if there is NA, then the if above should have caught it already */
        PROTECT(ret = NEW_NUMERIC(2));
        REAL(ret)[0] = _ret;
        REAL(ret)[1] = g_accumulator;
    } else {
        _init_sqlite_function_accumulator();
        sprintf(g_sql_buf[0], "select %s_df([%s]) from [%s].sdf_data", funcname, varname_src, iname_src);
        res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, NULL);
        if (_sqlite_error(res)) return R_NilValue;
        res = sqlite3_step(stmt); sqlite3_finalize(stmt);
 
        if (strcmp(funcname, "all") == 0 || strcmp(funcname, "any") == 0) {
            PROTECT(ret = NEW_LOGICAL(1));
            if (R_IsNA(g_accumulator)) LOGICAL(ret)[0] = NA_INTEGER;
            else LOGICAL(ret)[0] = !(g_accumulator == 0);
        } else {
            PROTECT(ret = NEW_NUMERIC(1));
            REAL(ret)[0] = g_accumulator;
        }
    }
 
__sdf_do_variable_summary_out:
    UNPROTECT(1);
    return ret;
}
 
 
SEXP sdf_sort_variable(SEXP svec, SEXP decreasing) {
    char *iname, *iname_src, *varname_src, *type;
    sqlite3_stmt *stmt;
    int res;
 
    iname_src = SDF_INAME(svec);
    varname_src = SVEC_VARNAME(svec);
 
    if (!USE_SDF1(iname_src, TRUE, TRUE)) return R_NilValue;
 
    /* determine type of svec */
    sprintf(g_sql_buf[0], "select [%s] from [%s].sdf_data limit 1", varname_src, iname_src);
    res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
    _sqlite_error(res);
    sqlite3_step(stmt);
    strcpy(g_sql_buf[0], sqlite3_column_decltype(stmt, 0));
    sqlite3_finalize(stmt);
 
    /* create a new vector of that type */
    iname = _create_svector1(mkString("tmp_sort"), g_sql_buf[0], NULL, TRUE);
 
    /* insert to new sdf ordered */
    sprintf(g_sql_buf[0], "insert into [%s].sdf_data "
            "select [row name], [%s] from [%s].sdf_data "
            "order by [%s] %s", iname, varname_src, iname_src, varname_src,
            (LOGICAL(decreasing)[0]) ? "desc" : "asc");
    res = _sqlite_exec(g_sql_buf[0]);
    _sqlite_error(res);
 
    if (TEST_SDFVECTORTYPE(svec, "factor")) { /* copy factor table to iname */
        if (TEST_SDFVECTORTYPE(svec, "ordered")) type = "ordered";
        else type = "factor";
        _copy_factor_levels2(type, iname_src, varname_src, iname, "V1");
    } else type = CHAR_ELT(GET_SDFVECTORTYPE(svec), 0);
 
    UNUSE_SDF2(iname_src);
    UNUSE_SDF2(iname);
 
    return _create_svector_sexp(iname, "sdf_data", "V1", type);
}
 
/****************************************************************************
 * VECTOR MATH/OPS/GROUP OPERATIONS
 ****************************************************************************/
 
R_INLINE int __vecmath_checkarg(sqlite3_context *ctx, sqlite3_value *arg, double *value) {
    int ret = 1;
    if (sqlite3_value_type(arg) == SQLITE_NULL) { 
        sqlite3_result_null(ctx); 
        ret = 0;
    } else {
        if (sqlite3_value_type(arg) == SQLITE_INTEGER) 
            *value = sqlite3_value_int(arg); 
        else *value = sqlite3_value_double(arg); 
    }
    return ret;
}
 
#define SQLITE_MATH_FUNC1(name, func) static void __vecmath_ ## name(\
        sqlite3_context *ctx, int argc, sqlite3_value **argv) { \
    double value; \
    if (__vecmath_checkarg(ctx, argv[0], &value)) { \
        sqlite3_result_double(ctx, func(value)); \
    }  \
}
 
#define SQLITE_MATH_FUNC2(name, func) static void __vecmath_ ## name(\
        sqlite3_context *ctx, int argc, sqlite3_value **argv) { \
    double value1, value2; \
    if (__vecmath_checkarg(ctx, argv[0], &value1) && \
        __vecmath_checkarg(ctx, argv[1], &value2)) { \
        sqlite3_result_double(ctx, func((long double)value1, (long double)value2)); \
    }  \
}
 
#define SQLITE_MATH_FUNC_CUM(name, func) static void __vecmath_ ## name(\
        sqlite3_context *ctx, int argc, sqlite3_value **argv) { \
    double value; \
    if (__vecmath_checkarg(ctx, argv[0], &value)) { \
        if (g_start) { g_start = 0; g_accumulator = value; } \
        else g_accumulator = func(g_accumulator, value); \
        sqlite3_result_double(ctx, g_accumulator); \
    }  \
}
 
#define LOGBASE(a, b) log(a)/log(b)
 
/* SQLITE_MATH_FUNC1(abs, abs)   in SQLite */
SQLITE_MATH_FUNC1(sign, sign)   /* in R */
SQLITE_MATH_FUNC1(sqrt, sqrt)
SQLITE_MATH_FUNC1(floor, floor)
SQLITE_MATH_FUNC1(ceiling, ceil)
SQLITE_MATH_FUNC1(trunc, ftrunc) /* in R */
/*SQLITE_MATH_FUNC2(round, fprec)  2 arg, in SQLite, but override with R's version */
SQLITE_MATH_FUNC2(signif, fround) /* 2 arg, in R */
SQLITE_MATH_FUNC1(exp, exp)
SQLITE_MATH_FUNC2(log, LOGBASE) /* 2 arg */
SQLITE_MATH_FUNC1(cos, cos)
SQLITE_MATH_FUNC1(sin, sin)
SQLITE_MATH_FUNC1(tan, tan)
SQLITE_MATH_FUNC1(acos, acos)
SQLITE_MATH_FUNC1(asin, asin)
SQLITE_MATH_FUNC1(atan, atan)
SQLITE_MATH_FUNC1(cosh, cosh)
SQLITE_MATH_FUNC1(sinh, sinh)
SQLITE_MATH_FUNC1(tanh, tanh)
SQLITE_MATH_FUNC1(acosh, acosh)  /* nowhere in include?? */
SQLITE_MATH_FUNC1(asinh, asinh)  /* nowhere in include?? */
SQLITE_MATH_FUNC1(atanh, atanh)  /* nowhere in include?? */
SQLITE_MATH_FUNC1(lgamma, lgammafn) /* in R */
SQLITE_MATH_FUNC1(gamma, gammafn) /* in R */
/* SQLITE_MATH_FUNC1(gammaCody, gammaCody)   * in R ?? */
SQLITE_MATH_FUNC1(digamma, digamma) /* in R */    
SQLITE_MATH_FUNC1(trigamma, trigamma) /* in R */
 
#define SUM(a, b)  (a) + (b)
#define PROD(a, b) (a) * (b)
#define MIN(a, b) ((a) <= (b)) ? (a) : (b)
#define MAX(a, b) ((a) >= (b)) ? (a) : (b)
#define ALL(a, b) (((a) == 0) || ((b) == 0)) ? 0 : 1
#define ANY(a, b) (((a) == 0) && ((b) == 0)) ? 0 : 1
 
SQLITE_MATH_FUNC_CUM(cumsum, SUM)
SQLITE_MATH_FUNC_CUM(cumprod, PROD)
SQLITE_MATH_FUNC_CUM(cummin, MIN)
SQLITE_MATH_FUNC_CUM(cummax, MAX)
 
#define SQLITE_SUMMARY_FUNC(name, func) static void __vecsummary_ ## name(\
        sqlite3_context *ctx, int argc, sqlite3_value **argv) { \
    double value; \
    if (!g_narm && R_IsNA(g_accumulator)) return; /* NA if na.rm=F & NA found */ \
    if (sqlite3_value_type(argv[0]) != SQLITE_NULL) {  \
        if (sqlite3_value_type(argv[0]) == SQLITE_INTEGER) {  \
            int tmp = sqlite3_value_int(argv[0]); \
            value = (tmp == NA_INTEGER) ? R_NaReal : tmp; \
        } else value = sqlite3_value_double(argv[0]);  \
        if (R_IsNA(value)) { \
            if (!g_narm) g_accumulator = value; return; \
        } else if (g_start) { g_start = 0; g_accumulator = value; } \
        else g_accumulator = func(g_accumulator, value); \
    } \
}
 
SQLITE_SUMMARY_FUNC(all_df, ALL)
SQLITE_SUMMARY_FUNC(any_df, ANY)
SQLITE_SUMMARY_FUNC(sum_df, SUM)
SQLITE_SUMMARY_FUNC(prod_df, PROD)
SQLITE_SUMMARY_FUNC(min_df, MIN)
SQLITE_SUMMARY_FUNC(max_df, MAX)
 
static void __vecsummary_finalize(sqlite3_context *ctx) {
    /* g_accumulator already summarizes it. just return that */
    sqlite3_result_double(ctx, g_accumulator);
}
 
static void __r_modulo(sqlite3_context *ctx, int argc, sqlite3_value **argv) {
    if (sqlite3_value_type(argv[0]) == SQLITE_NULL ||
        sqlite3_value_type(argv[1]) == SQLITE_NULL) { 
        sqlite3_result_null(ctx); 
    } else {
        double v1, v2, q, tmp;
        if (sqlite3_value_type(argv[0]) == SQLITE_INTEGER && 
            sqlite3_value_type(argv[1]) == SQLITE_INTEGER) {
            int i1, i2;
            i1 = sqlite3_value_int(argv[0]);
            i2 = sqlite3_value_int(argv[1]);
            if (i1 > 0 && i2 > 0) { 
                sqlite3_result_int(ctx, i1 % i2); return;
            }
            v1 = i1; v2 = i2;
        } else {
            v1 = sqlite3_value_double(argv[0]);
            v2 = sqlite3_value_double(argv[1]);
        }
        /* copied from myfmod() in src/main/arithmetic.c */
        q = v1 / v2; 
        if (v2 == 0) sqlite3_result_double(ctx, R_NaN);
        tmp = v1 - floor(q) * v2;
        /* checking omitted */
        q = floor(tmp/v2);
        sqlite3_result_double(ctx, tmp - q*v2);
 
    }
}
 
static void __r_intdiv(sqlite3_context *ctx, int argc, sqlite3_value **argv) {
    if (sqlite3_value_type(argv[0]) == SQLITE_NULL ||
        sqlite3_value_type(argv[1]) == SQLITE_NULL) { 
        sqlite3_result_null(ctx); 
    } else {
        double v1, v2;
        if (sqlite3_value_type(argv[0]) == SQLITE_INTEGER && 
            sqlite3_value_type(argv[1]) == SQLITE_INTEGER) {
            int i1, i2;
            i1 = sqlite3_value_int(argv[0]);
            i2 = sqlite3_value_int(argv[1]);
            if (i1 == NA_INTEGER || i2 == NA_INTEGER) {
                sqlite3_result_int(ctx, NA_INTEGER); return;
            } else if (i2 == 0) {
                sqlite3_result_int(ctx, 0); return;
            }
            v1 = i1; v2 = i2;
        } else {
            v1 = sqlite3_value_double(argv[0]);
            v2 = sqlite3_value_double(argv[1]);
        }
        /* copied from IDIVOP cases in src/main/arithmetic.c */
        sqlite3_result_double(ctx, floor(v1/v2));
    }
}
#define VMENTRY1(func)  {#func, __vecmath_ ## func}
#define VSENTRY1(func)  {#func, __vecsummary_ ## func}
void __register_vector_math() {
    int i, res;
    static const struct {
        char *name;
        void (*func)(sqlite3_context*, int, sqlite3_value**);
    } arr_func1[] = {
        VMENTRY1(sign),
        VMENTRY1(sqrt),
        VMENTRY1(floor),
        VMENTRY1(ceiling),
        VMENTRY1(trunc),
        VMENTRY1(exp),
        VMENTRY1(cos),
        VMENTRY1(sin),
        VMENTRY1(tan),
        VMENTRY1(acos),
        VMENTRY1(asin),
        VMENTRY1(atan),
        VMENTRY1(cosh),
        VMENTRY1(sinh),
        VMENTRY1(tanh),
        VMENTRY1(acosh),
        VMENTRY1(asinh),
        VMENTRY1(atanh),
        VMENTRY1(lgamma),
        VMENTRY1(gamma),
        VMENTRY1(digamma),
        VMENTRY1(trigamma),
        VMENTRY1(cumsum),
        VMENTRY1(cumprod),
        VMENTRY1(cummin),
        VMENTRY1(cummax)
    }, arr_func2[] =  {
        {"r_mod", __r_modulo},
        {"r_intdiv", __r_intdiv},
        /*VMENTRY1(round),*/
        VMENTRY1(signif),
        VMENTRY1(log)
    }, arr_sum1[] = {
        VSENTRY1(all_df),  /* can't override sum, min, max */
        VSENTRY1(any_df),
        VSENTRY1(sum_df),
        VSENTRY1(prod_df),
        VSENTRY1(min_df),
        VSENTRY1(max_df)
    };
 
    int len = sizeof(arr_func1) / sizeof(arr_func1[0]);
 
    for (i = 0; i < len; i++) {
        res = sqlite3_create_function(g_workspace, arr_func1[i].name, 1, 
                SQLITE_ANY, NULL, arr_func1[i].func, NULL, NULL);
        _sqlite_error(res);
    }
 
    len = sizeof(arr_func2) / sizeof(arr_func2[0]);
    for (i = 0; i < len; i++) {
        res = sqlite3_create_function(g_workspace, arr_func2[i].name, 2, 
                SQLITE_ANY, NULL, arr_func2[i].func, NULL, NULL);
        _sqlite_error(res);
    }
 
    len = sizeof(arr_sum1) / sizeof(arr_sum1[0]);
    for (i = 0; i < len; i++) {
        res = sqlite3_create_function(g_workspace, arr_sum1[i].name, 1, 
                SQLITE_ANY, NULL, NULL, arr_sum1[i].func, __vecsummary_finalize);
        _sqlite_error(res);
    }
}

Rev 3473	Rev 3684
1	`#include "sqlite_dataframe.h"`	1	`#include "sqlite_dataframe.h"`
2	`#include <math.h>`	2	`#include <math.h>`
3	`#include "Rmath.h"`	3	`#include "Rmath.h"`
4		4
5	`/****************************************************************************`	5	`/****************************************************************************`
6	`* UTILITY FUNCTIONS`	6	`* UTILITY FUNCTIONS`
7	`****************************************************************************/`	7	`****************************************************************************/`
8	`char _create_svector1(SEXP name, const char type, int * _namelen, int protect) {`	8	`char _create_svector1(SEXP name, const char type, int * _namelen, int protect) {`
9	`int namelen, res;`	9	`int namelen, res;`
10	`char *iname = _create_sdf_skeleton1(name, &namelen, protect);`	10	`char *iname = _create_sdf_skeleton1(name, &namelen, protect);`
11		11
12	`if (iname == NULL) return NULL;`	12	`if (iname == NULL) return NULL;`
13		13
14	`sprintf(g_sql_buf[2], "create table [%s].sdf_data ([row name] text, "`	14	`sprintf(g_sql_buf[2], "create table [%s].sdf_data ([row name] text, "`
15	`"V1 %s, primary key ([row name]))", iname, type);`	15	`"V1 %s, primary key ([row name]))", iname, type);`
16	`res = _sqlite_exec(g_sql_buf[2]);`	16	`res = _sqlite_exec(g_sql_buf[2]);`
17	`_sqlite_error(res);`	17	`_sqlite_error(res);`
18		18
19	`if (_namelen != NULL) *_namelen = namelen;`	19	`if (_namelen != NULL) *_namelen = namelen;`
20	`return iname;`	20	`return iname;`
21	`}`	21	`}`
22		22
23	`static SEXP _create_svector_sexp(const char iname, const char varname,`	23	`SEXP _create_svector_sexp(const char iname, const char tblname,`
24	`const char *type) {`	24	`const char varname, const char type) {`
25	`SEXP ret, value; int nprotected = 0;`	25	`SEXP ret, value; int nprotected = 0;`
26	`PROTECT(ret = NEW_LIST(2)); nprotected++;`	26	`PROTECT(ret = NEW_LIST(3)); nprotected++;`
27		27
28	`/* set list names */`	28	`/* set list names */`
29	`PROTECT(value = NEW_CHARACTER(2)); nprotected++;`	29	`PROTECT(value = NEW_CHARACTER(3)); nprotected++;`
30	`SET_STRING_ELT(value, 0, mkChar("iname"));`	30	`SET_STRING_ELT(value, 0, mkChar("iname"));`
-		31	`SET_STRING_ELT(value, 1, mkChar("tblname"));`
31	`SET_STRING_ELT(value, 1, mkChar("varname"));`	32	`SET_STRING_ELT(value, 2, mkChar("varname"));`
32	`SET_NAMES(ret, value);`	33	`SET_NAMES(ret, value);`
33		34
34	`/* set list values */`	35	`/* set list values */`
35	`SET_VECTOR_ELT(ret, 0, mkString(iname));`	36	`SET_VECTOR_ELT(ret, 0, mkString(iname));`
-		37	`SET_VECTOR_ELT(ret, 1, mkString(tblname));`
36	`SET_VECTOR_ELT(ret, 1, mkString(varname));`	38	`SET_VECTOR_ELT(ret, 2, mkString(varname));`
37		39
38	`/* set sexp class */`	40	`/* set sexp class */`
39	`SET_CLASS(ret, mkString("sqlite.vector"));`	41	`SET_CLASS(ret, mkString("sqlite.vector"));`
40		42
41	`/* set sdf.vector.type */`	43	`/* set sdf.vector.type */`
42	`SET_SDFVECTORTYPE(ret, mkString(type));`	44	`SET_SDFVECTORTYPE(ret, mkString(type));`
43		45
44	`UNPROTECT(nprotected);`	46	`UNPROTECT(nprotected);`
45		47
46	`return ret;`	48	`return ret;`
47	`}`	49	`}`
48		50
49	`/* if ret == NULL, 3rd arg is the length of the vector created. otherwise`	51	`/* if ret == NULL, 3rd arg is the length of the vector created. otherwise`
50	`* it is the index in the vector ret where we will put the result extracted`	52	`* it is the index in the vector ret where we will put the result extracted`
51	`* from ret */`	53	`* from ret */`
52	`int _get_vector_index_typed_result(sqlite3_stmt stmt, SEXP ret, int idx_or_len) {`	54	`int _get_vector_index_typed_result(sqlite3_stmt stmt, SEXP ret, int idx_or_len) {`
53	`int added = 1;`	55	`int added = 1;`
54	`if (ret == NULL \|\| ret == R_NilValue) {`	56	`if (ret == NULL \|\| ret == R_NilValue) {`
55	`const char *coltype = sqlite3_column_decltype(stmt, 0);`	57	`const char *coltype = sqlite3_column_decltype(stmt, 0);`
56	`if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {`	58	`if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {`
57	`added = 0;`	59	`added = 0;`
58	`}`	60	`}`
59		61
60	`if (strcmp(coltype, "text") == 0) {`	62	`if (strcmp(coltype, "text") == 0) {`
61	`PROTECT(*ret = NEW_CHARACTER(idx_or_len));`	63	`PROTECT(*ret = NEW_CHARACTER(idx_or_len));`
62	`if (added)`	64	`if (added)`
63	`SET_STRING_ELT(ret, 0, mkChar((char )sqlite3_column_text(stmt, 0)));`	65	`SET_STRING_ELT(ret, 0, mkChar((char )sqlite3_column_text(stmt, 0)));`
64	`} else if (strcmp(coltype, "double") == 0) {`	66	`} else if (strcmp(coltype, "double") == 0) {`
65	`PROTECT(*ret = NEW_NUMERIC(idx_or_len));`	67	`PROTECT(*ret = NEW_NUMERIC(idx_or_len));`
66	`if (added) REAL(*ret)[0] = sqlite3_column_double(stmt, 0);`	68	`if (added) REAL(*ret)[0] = sqlite3_column_double(stmt, 0);`
67	`} else if (strcmp(coltype, "bit") == 0) {`	69	`} else if (strcmp(coltype, "bit") == 0) {`
68	`PROTECT(*ret = NEW_LOGICAL(idx_or_len));`	70	`PROTECT(*ret = NEW_LOGICAL(idx_or_len));`
69	`if (added) INTEGER(*ret)[0] = sqlite3_column_int(stmt, 0);`	71	`if (added) INTEGER(*ret)[0] = sqlite3_column_int(stmt, 0);`
70	`} else if (strcmp(coltype, "integer") == 0 \|\|`	72	`} else if (strcmp(coltype, "integer") == 0 \|\|`
71	`strcmp(coltype, "int") == 0) {`	73	`strcmp(coltype, "int") == 0) {`
72	`/* caller should just copy off the vars level attr for factors */`	74	`/* caller should just copy off the vars level attr for factors */`
73	`PROTECT(*ret = NEW_INTEGER(idx_or_len));`	75	`PROTECT(*ret = NEW_INTEGER(idx_or_len));`
74	`if (added) INTEGER(*ret)[0] = sqlite3_column_int(stmt, 0);`	76	`if (added) INTEGER(*ret)[0] = sqlite3_column_int(stmt, 0);`
75	`} else added = 0;`	77	`} else added = 0;`
76		78
77	`UNPROTECT(1);`	79	`UNPROTECT(1);`
78	`} else {`	80	`} else if (stmt != NULL) {`
79	`const char *coltype = sqlite3_column_decltype(stmt, 0);`	81	`const char *coltype = sqlite3_column_decltype(stmt, 0);`
80	`if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {`	82	`if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {`
81	`added = 0;`	83	`added = 0;`
82	`} else if (strcmp(coltype, "text") == 0) {`	84	`} else if (strcmp(coltype, "text") == 0) {`
83	`SET_STRING_ELT(*ret, idx_or_len,`	85	`SET_STRING_ELT(*ret, idx_or_len,`
84	`mkChar((char *)sqlite3_column_text(stmt, 0)));`	86	`mkChar((char *)sqlite3_column_text(stmt, 0)));`
85	`} else if (strcmp(coltype, "double") == 0) {`	87	`} else if (strcmp(coltype, "double") == 0) {`
86	`REAL(*ret)[idx_or_len] = sqlite3_column_double(stmt, 0);`	88	`REAL(*ret)[idx_or_len] = sqlite3_column_double(stmt, 0);`
87	`} else if (strcmp(coltype, "bit") == 0) {`	89	`} else if (strcmp(coltype, "bit") == 0) {`
88	`INTEGER(*ret)[idx_or_len] = sqlite3_column_int(stmt, 0);`	90	`INTEGER(*ret)[idx_or_len] = sqlite3_column_int(stmt, 0);`
89	`} else if (strcmp(coltype, "integer") == 0 \|\|`	91	`} else if (strcmp(coltype, "integer") == 0 \|\|`
90	`strcmp(coltype, "int") == 0) {`	92	`strcmp(coltype, "int") == 0) {`
91	`/* caller should just copy off the vars level attr for factors */`	93	`/* caller should just copy off the vars level attr for factors */`
92	`INTEGER(*ret)[idx_or_len] = sqlite3_column_int(stmt, 0);`	94	`INTEGER(*ret)[idx_or_len] = sqlite3_column_int(stmt, 0);`
93	`} else added = 0;`	95	`} else added = 0;`
-		96	`} else if (stmt == NULL) {`
-		97	`const char *coltype = sqlite3_column_decltype(stmt, 0);`
-		98	`if (sqlite3_column_type(stmt, 0) == SQLITE_NULL) {`
-		99	`added = 0;`
-		100	`} else if (strcmp(coltype, "text") == 0) {`
-		101	`SET_STRING_ELT(*ret, idx_or_len, NA_STRING);`
-		102	`} else if (strcmp(coltype, "double") == 0) {`
-		103	`REAL(*ret)[idx_or_len] = NA_REAL;`
-		104	`} else if (strcmp(coltype, "bit") == 0 \|\| strcmp(coltype, "integer") == 0 \|\|`
-		105	`strcmp(coltype, "int") == 0) {`
-		106	`INTEGER(*ret)[idx_or_len] = NA_INTEGER;`
-		107	`} else added = 0;`
94	`}`	108	`}`
95		109
96	`return added;`	110	`return added;`
97	`}`	111	`}`
98		112
99	`/****************************************************************************`	113	`/****************************************************************************`
100	`* SVEC FUNCTIONS`	114	`* SVEC FUNCTIONS`
101	`****************************************************************************/`	115	`****************************************************************************/`
102	`SEXP sdf_get_variable(SEXP sdf, SEXP name) {`	116	`SEXP sdf_get_variable(SEXP sdf, SEXP name) {`
103	`char iname, varname, *svec_type = NULL;`	117	`char iname, varname, *svec_type = NULL;`
104	`const char *coltype;`	118	`const char *coltype;`
105	`int type = -1, res, nprotected = 0;`	119	`int type = -1, res, nprotected = 0;`
106	`SEXP ret, value;`	120	`SEXP ret, value;`
107		121
108	`if (!IS_CHARACTER(name)) {`	122	`if (!IS_CHARACTER(name)) {`
109	`error("argument is not a string.\n");`	123	`error("argument is not a string.\n");`
110	`}`	124	`}`
111		125
112	`iname = SDF_INAME(sdf);`	126	`iname = SDF_INAME(sdf);`
113	`varname = CHAR_ELT(name, 0);`	127	`varname = CHAR_ELT(name, 0);`
114		128
115	`if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;`	129	`if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;`
116		130
117	`/* check if sdf & varname w/in that sdf exists */`	131	`/* check if sdf & varname w/in that sdf exists */`
118	`sqlite3_stmt *stmt;`	132	`sqlite3_stmt *stmt;`
119	`sprintf(g_sql_buf[0], "select [%s] from [%s].sdf_data", varname, iname);`	133	`sprintf(g_sql_buf[0], "select [%s] from [%s].sdf_data", varname, iname);`
120		134
121	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	135	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
122		136
123	`if (_sqlite_error(res)) return R_NilValue;`	137	`if (_sqlite_error(res)) return R_NilValue;`
124		138
125	`coltype = sqlite3_column_decltype(stmt, 0);`	139	`coltype = sqlite3_column_decltype(stmt, 0);`
126	`sqlite3_finalize(stmt);`	140	`sqlite3_finalize(stmt);`
127		141
128	`PROTECT(ret = NEW_LIST(2)); nprotected++;`	142	`PROTECT(ret = NEW_LIST(3)); nprotected++;`
129		143
130	`/* set list names */`	144	`/* set list names */`
131	`PROTECT(value = NEW_CHARACTER(2)); nprotected++;`	145	`PROTECT(value = NEW_CHARACTER(3)); nprotected++;`
132	`SET_STRING_ELT(value, 0, mkChar("iname"));`	146	`SET_STRING_ELT(value, 0, mkChar("iname"));`
-		147	`SET_STRING_ELT(value, 1, mkChar("tblname"));`
133	`SET_STRING_ELT(value, 1, mkChar("varname"));`	148	`SET_STRING_ELT(value, 2, mkChar("varname"));`
134	`SET_NAMES(ret, value);`	149	`SET_NAMES(ret, value);`
135		150
136	`/* set list values */`	151	`/* set list values */`
137	`SET_VECTOR_ELT(ret, 0, mkString(iname));`	152	`SET_VECTOR_ELT(ret, 0, mkString(iname));`
-		153	`SET_VECTOR_ELT(ret, 1, mkString("sdf_data"));`
138	`SET_VECTOR_ELT(ret, 1, mkString(varname));`	154	`SET_VECTOR_ELT(ret, 2, mkString(varname));`
139		155
140	`/* set class */`	156	`/* set class */`
141	`if (strcmp(coltype, "text") == 0) svec_type = "character";`	157	`if (strcmp(coltype, "text") == 0) svec_type = "character";`
142	`else if (strcmp(coltype, "double") == 0) svec_type = "numeric";`	158	`else if (strcmp(coltype, "double") == 0) svec_type = "numeric";`
143	`else if (strcmp(coltype, "bit") == 0) svec_type = "logical";`	159	`else if (strcmp(coltype, "bit") == 0) svec_type = "logical";`
144	`else if (strcmp(coltype, "integer") == 0 \|\| strcmp(coltype, "int") == 0) {`	160	`else if (strcmp(coltype, "integer") == 0 \|\| strcmp(coltype, "int") == 0) {`
145	`/* determine if int, factor or ordered */`	161	`/* determine if int, factor or ordered */`
146	`type = _get_factor_levels1(iname, varname, ret);`	162	`type = _get_factor_levels1(iname, varname, ret);`
147	`switch(type) {`	163	`switch(type) {`
148	`case VAR_INTEGER: svec_type = "integer"; break;`	164	`case VAR_INTEGER: svec_type = "integer"; break;`
149	`case VAR_FACTOR: svec_type = "factor"; break;`	165	`case VAR_FACTOR: svec_type = "factor"; break;`
150	`case VAR_ORDERED: svec_type = "ordered";`	166	`case VAR_ORDERED: svec_type = "ordered";`
151	`}`	167	`}`
152		168
153	`}`	169	`}`
154		170
155	`SET_CLASS(ret, mkString("sqlite.vector"));`	171	`SET_CLASS(ret, mkString("sqlite.vector"));`
156	`SET_SDFVECTORTYPE(ret, mkString(svec_type));`	172	`SET_SDFVECTORTYPE(ret, mkString(svec_type));`
157		173
158	`UNPROTECT(nprotected);`	174	`UNPROTECT(nprotected);`
159	`return ret;`	175	`return ret;`
160		176
161	`}`	177	`}`
162		178
163		179
164	`SEXP sdf_get_variable_length(SEXP svec) {`	180	`SEXP sdf_get_variable_length(SEXP svec) {`
165	`char *iname = SDF_INAME(svec);`	181	`char *iname = SDF_INAME(svec);`
166	`if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;`	182	`if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;`
167		183
168	`return ScalarInteger(_get_row_count2(iname, 1));`	184	`return ScalarInteger(_get_row_count2(iname, 1));`
169	`}`	185	`}`
170		186
171		187
172	`SEXP sdf_get_variable_index(SEXP svec, SEXP idx) {`	188	`SEXP sdf_get_variable_index(SEXP svec, SEXP idx) {`
173	`SEXP ret = R_NilValue, tmp;`	189	`SEXP ret = R_NilValue, tmp;`
174	`char iname = SDF_INAME(svec), varname = SVEC_VARNAME(svec);`	190	`char iname = SDF_INAME(svec), tblname = SVEC_TBLNAME(svec),`
-		191	`*varname = SVEC_VARNAME(svec);`
175	`int index, idxlen, i, retlen=0, res;`	192	`int index, idxlen, i, retlen=0, res;`
176	`sqlite3_stmt *stmt;`	193	`sqlite3_stmt *stmt;`
177		194
178	`if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;`	195	`if (!USE_SDF1(iname, TRUE, FALSE)) return R_NilValue;`
179		196
180	`idxlen = LENGTH(idx);`	197	`idxlen = LENGTH(idx);`
181	`if (idxlen < 1) return ret;`	198	`if (idxlen < 1) return ret;`
182		199
183	`sprintf(g_sql_buf[0], "select [%s] from [%s].sdf_data limit ?,1",`	200	`sprintf(g_sql_buf[0], "select [%s] from [%s].[%s] limit ?,1",`
184	`varname, iname);`	201	`varname, iname, tblname);`
185	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	202	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
-		203	`if (_sqlite_error(res)) error("cannot complete request");`
186		204
187	`/* get data based on index */`	205	`/* get data based on index */`
188	`if (IS_NUMERIC(idx)) {`	206	`if (IS_NUMERIC(idx)) {`
189	`index = ((int) REAL(idx)[0]) - 1;`	207	`index = ((int) REAL(idx)[0]) - 1;`
190	`if (index < 0 && idxlen == 1) return ret;`	208	`if (index < 0 && idxlen == 1) return ret;`
191		209
192	`if (index >= 0) {`	210	`if (index >= 0) {`
193	`sqlite3_bind_int(stmt, 1, index);`	211	`sqlite3_bind_int(stmt, 1, index);`
194	`res = sqlite3_step(stmt);`	212	`res = sqlite3_step(stmt);`
195	`if (res == SQLITE_ROW) {`	213	`if (res == SQLITE_ROW) {`
196	`retlen = _get_vector_index_typed_result(stmt, &ret, idxlen);`	214	`retlen = _get_vector_index_typed_result(stmt, &ret, idxlen);`
197	`}`	215	`}`
198	`}`	216	`}`
199		217
200	`if (index < 0 \|\| res != SQLITE_ROW) {`	218	`if (index < 0 \|\| res != SQLITE_ROW) {`
201	`/* something wrong w/ 1st idx, and it is quietly ignored. we make`	219	`/* something wrong w/ 1st idx, and it is quietly ignored. we make`
202	`* a "dummy" call to setup the SEXP */`	220	`* a "dummy" call to setup the SEXP */`
203	`sqlite3_reset(stmt);`	221	`sqlite3_reset(stmt);`
204	`sqlite3_bind_int(stmt, 1, 0);`	222	`sqlite3_bind_int(stmt, 1, 0);`
205	`res = sqlite3_step(stmt);`	223	`res = sqlite3_step(stmt);`
206	`if (res == SQLITE_ROW) {`	224	`if (res == SQLITE_ROW) {`
207	`_get_vector_index_typed_result(stmt, &ret, idxlen - 1);`	225	`_get_vector_index_typed_result(stmt, &ret, idxlen - 1);`
208	`}`	226	`}`
209	`retlen = 0;`	227	`retlen = 0;`
210	`}`	228	`}`
211		229
212		230
213	`if (idxlen > 1) {`	231	`if (idxlen > 1) {`
214	`for (i = 1; i < idxlen; i++) {`	232	`for (i = 1; i < idxlen; i++) {`
215	`index = ((int) REAL(idx)[i]) - 1;`	233	`index = ((int) REAL(idx)[i]) - 1;`
216	`if (index < 0) continue;`	234	`if (index < 0) continue;`
217	`sqlite3_reset(stmt);`	235	`sqlite3_reset(stmt);`
218	`sqlite3_bind_int(stmt, 1, index);`	236	`sqlite3_bind_int(stmt, 1, index);`
219	`res = sqlite3_step(stmt);`	237	`res = sqlite3_step(stmt);`
220	`if (res == SQLITE_ROW)`	238	`if (res == SQLITE_ROW) {`
221	`retlen += _get_vector_index_typed_result(stmt, &ret, retlen);`	239	`retlen += _get_vector_index_typed_result(stmt, &ret, retlen);`
-		240	`} else {`
-		241	`retlen += _get_vector_index_typed_result(NULL, &ret, retlen);`
-		242	`}`
222	`}`	243	`}`
223	`}`	244	`}`
224	`} else if (IS_INTEGER(idx)) {`	245	`} else if (IS_INTEGER(idx)) {`
225	`/* similar to REAL (IS_NUMERIC) above, except that we don't have`	246	`/* similar to REAL (IS_NUMERIC) above, except that we don't have`
226	`* to cast idx to int. can't refactor this out, sucks. */`	247	`* to cast idx to int. can't refactor this out, sucks. */`
227	`index = INTEGER(idx)[0] - 1;`	248	`index = INTEGER(idx)[0] - 1;`
228	`if (index < 0 && idxlen == 1) return ret;`	249	`if (index < 0 && idxlen == 1) return ret;`
229		250
230	`if (index >= 0) {`	251	`if (index >= 0) {`
231	`sqlite3_bind_int(stmt, 1, index);`	252	`sqlite3_bind_int(stmt, 1, index);`
232	`res = sqlite3_step(stmt);`	253	`res = sqlite3_step(stmt);`
233	`if (res == SQLITE_ROW) {`	254	`if (res == SQLITE_ROW) {`
234	`retlen = _get_vector_index_typed_result(stmt, &ret, idxlen);`	255	`retlen = _get_vector_index_typed_result(stmt, &ret, idxlen);`
235	`}`	256	`}`
236	`}`	257	`}`
237		258
238	`if (index < 0 \|\| res != SQLITE_ROW) {`	259	`if (index < 0 \|\| res != SQLITE_ROW) {`
239	`/* something wrong w/ 1st idx, and it is quietly ignored. we make`	260	`/* something wrong w/ 1st idx, and it is quietly ignored. we make`
240	`* a "dummy" call to setup the SEXP */`	261	`* a "dummy" call to setup the SEXP */`
241	`sqlite3_reset(stmt);`	262	`sqlite3_reset(stmt);`
242	`sqlite3_bind_int(stmt, 1, 0);`	263	`sqlite3_bind_int(stmt, 1, 0);`
243	`res = sqlite3_step(stmt);`	264	`res = sqlite3_step(stmt);`
244	`if (res == SQLITE_ROW) {`	265	`if (res == SQLITE_ROW) {`
245	`_get_vector_index_typed_result(stmt, &ret, idxlen - 1);`	266	`_get_vector_index_typed_result(stmt, &ret, idxlen - 1);`
246	`}`	267	`}`
247	`retlen = 0;`	268	`retlen = 0;`
248	`}`	269	`}`
249		270
250	`if (idxlen > 1) {`	271	`if (idxlen > 1) {`
251	`for (i = 1; i < idxlen; i++) {`	272	`for (i = 1; i < idxlen; i++) {`
252	`index = INTEGER(idx)[i] - 1;`	273	`index = INTEGER(idx)[i] - 1;`
253	`if (index < 0) continue;`	274	`if (index < 0) continue;`
254	`sqlite3_reset(stmt);`	275	`sqlite3_reset(stmt);`
255	`sqlite3_bind_int(stmt, 1, index);`	276	`sqlite3_bind_int(stmt, 1, index);`
256	`sqlite3_step(stmt);`	277	`res = sqlite3_step(stmt);`
-		278	`if (res == SQLITE_ROW) {`
257	`retlen += _get_vector_index_typed_result(stmt, &ret, retlen);`	279	`retlen += _get_vector_index_typed_result(stmt, &ret, retlen);`
-		280	`} else {`
-		281	`retlen += _get_vector_index_typed_result(NULL, &ret, retlen);`
-		282	`}`
258	`}`	283	`}`
259	`}`	284	`}`
260		285
261	`} else if (IS_LOGICAL(idx)) {`	286	`} else if (IS_LOGICAL(idx)) {`
262	`/* have to deal with recycling */`	287	`/* have to deal with recycling */`
263	`int veclen = _get_row_count2(iname, 1);`	288	`int veclen = _get_row_count2(iname, 1);`
264		289
265	`/* find if there is any TRUE element in the vector */`	290	`/* find if there is any TRUE element in the vector */`
266	`for (i = 0; i < idxlen && i < veclen; i++) {`	291	`for (i = 0; i < idxlen && i < veclen; i++) {`
267	`if (LOGICAL(idx)[i]) {`	292	`if (LOGICAL(idx)[i]) {`
268	`sqlite3_bind_int(stmt, 1, i);`	293	`sqlite3_bind_int(stmt, 1, i);`
269	`sqlite3_step(stmt);`	294	`sqlite3_step(stmt);`
270	`/* there are at least (idxlen-i) TRUE per cycle of the LOGICAL`	295	`/* there are at least (idxlen-i) TRUE per cycle of the LOGICAL`
271	`* index. there are at least (veclen/idxlen) cycles (int div).`	296	`* index. there are at least (veclen/idxlen) cycles (int div).`
272	`* at the last cycle, if (veclen%idxlen > 0), there will be`	297	`* at the last cycle, if (veclen%idxlen > 0), there will be`
273	`* at least (veclen%idxlen - i) if veclen%idxlen > i */`	298	`* at least (veclen%idxlen - i) if veclen%idxlen > i */`
274	`retlen = (idxlen-i) * (veclen/idxlen);`	299	`retlen = (idxlen-i) * (veclen/idxlen);`
275	`if (veclen%idxlen > i) retlen += (veclen%idxlen - i);`	300	`if (veclen%idxlen > i) retlen += (veclen%idxlen - i);`
276		301
277	`/* create the vector */`	302	`/* create the vector */`
278	`retlen = _get_vector_index_typed_result(stmt, &ret, retlen);`	303	`retlen = _get_vector_index_typed_result(stmt, &ret, retlen);`
279	`break;`	304	`break;`
280	`}`	305	`}`
281	`}`	306	`}`
282		307
283	`if (i < idxlen && i < veclen) {`	308	`if (i < idxlen && i < veclen) {`
284	`for (i++; i < veclen; i++) {`	309	`for (i++; i < veclen; i++) {`
285	`if (LOGICAL(idx)[i%idxlen]) {`	310	`if (LOGICAL(idx)[i%idxlen]) {`
286	`sqlite3_reset(stmt);`	311	`sqlite3_reset(stmt);`
287	`sqlite3_bind_int(stmt, 1, i);`	312	`sqlite3_bind_int(stmt, 1, i);`
288	`sqlite3_step(stmt);`	313	`res = sqlite3_step(stmt);`
-		314	`if (res == SQLITE_ROW) {`
289	`retlen += _get_vector_index_typed_result(stmt, &ret, retlen);`	315	`retlen += _get_vector_index_typed_result(stmt, &ret, retlen);`
-		316	`} else {`
-		317	`retlen += _get_vector_index_typed_result(NULL, &ret, retlen);`
-		318	`}`
290	`}`	319	`}`
291	`}`	320	`}`
292	`}`	321	`}`
293	`}`	322	`}`
294		323
295	`sqlite3_finalize(stmt);`	324	`sqlite3_finalize(stmt);`
296		325
297	`if (ret != R_NilValue) {`	326	`if (ret != R_NilValue) {`
298	`ret = _shrink_vector(ret, retlen);`	327	`ret = _shrink_vector(ret, retlen);`
299	`tmp = GET_LEVELS(svec);`	328	`tmp = GET_LEVELS(svec);`
300	`if (tmp != R_NilValue) {`	329	`if (tmp != R_NilValue) {`
301	`SET_LEVELS(ret, duplicate(tmp));`	330	`SET_LEVELS(ret, duplicate(tmp));`
302	`if (TEST_SDFVECTORTYPE(svec, "factor")) {`	331	`if (TEST_SDFVECTORTYPE(svec, "factor")) {`
303	`SET_CLASS(ret, mkString("factor"));`	332	`SET_CLASS(ret, mkString("factor"));`
304	`} else {`	333	`} else {`
305	`PROTECT(tmp = NEW_CHARACTER(2));`	334	`PROTECT(tmp = NEW_CHARACTER(2));`
306	`SET_STRING_ELT(tmp, 0, mkChar("ordered"));`	335	`SET_STRING_ELT(tmp, 0, mkChar("ordered"));`
307	`SET_STRING_ELT(tmp, 1, mkChar("factor"));`	336	`SET_STRING_ELT(tmp, 1, mkChar("factor"));`
308	`UNPROTECT(1);`	337	`UNPROTECT(1);`
309	`}`	338	`}`
310	`}`	339	`}`
311	`}`	340	`}`
312		341
313	`return ret;`	342	`return ret;`
314	`}`	343	`}`
315		344
316	`/* sqlite.vector.[<- */`	345	`/* sqlite.vector.[<- */`
317	`SEXP sdf_set_variable_index(SEXP svec, SEXP idx, SEXP value) {`	346	`SEXP sdf_set_variable_index(SEXP svec, SEXP idx, SEXP value) {`
318	`int idx_len, val_len;`	347	`int idx_len, val_len;`
319		348
320	`/* match levels if factor or ordered */`	349	`/* match levels if factor or ordered */`
321	`if (inherits(value, "ordered")) {`	350	`if (inherits(value, "ordered")) {`
322	`} else if (inherits(value, "factor")) {`	351	`} else if (inherits(value, "factor")) {`
323	`}`	352	`}`
324		353
325	`idx_len = LENGTH(idx);`	354	`idx_len = LENGTH(idx);`
326	`val_len = LENGTH(value);`	355	`val_len = LENGTH(value);`
327		356
328	`if (IS_NUMERIC(idx)) {`	357	`if (IS_NUMERIC(idx)) {`
329	`} else if (IS_INTEGER(idx)) {`	358	`} else if (IS_INTEGER(idx)) {`
330	`} else if (IS_LOGICAL(idx)) {`	359	`} else if (IS_LOGICAL(idx)) {`
331	`}`	360	`}`
332		361
333	`return R_NilValue;`	362	`return R_NilValue;`
334	`}`	363	`}`
335		364
336	`SEXP sdf_variable_summary(SEXP svec, SEXP maxsum) {`	365	`SEXP sdf_variable_summary(SEXP svec, SEXP maxsum) {`
337	`char iname, varname, *type;`	366	`char iname, tblname, varname, type;`
338	`sqlite3_stmt *stmt;`	367	`sqlite3_stmt *stmt;`
339	`int nprotected = 0;`	368	`int nprotected = 0;`
340	`SEXP ret, names;`	369	`SEXP ret, names;`
341		370
342	`iname = SDF_INAME(svec);`	371	`iname = SDF_INAME(svec);`
-		372	`tblname = SVEC_TBLNAME(svec);`
343	`varname = SVEC_VARNAME(svec);`	373	`varname = SVEC_VARNAME(svec);`
344	`USE_SDF1(iname, TRUE, FALSE);`	374	`USE_SDF1(iname, TRUE, FALSE);`
345		375
346	`if ((TEST_SDFVECTORTYPE(svec, "ordered") && ((type = "ordered"))) \|\|`	376	`if ((TEST_SDFVECTORTYPE(svec, "ordered") && ((type = "ordered"))) \|\|`
347	`(TEST_SDFVECTORTYPE(svec, "factor") && ((type = "factor")))) {`	377	`(TEST_SDFVECTORTYPE(svec, "factor") && ((type = "factor")))) {`
348	`int nrows, i, max_rows = INTEGER(maxsum)[0];`	378	`int nrows, i, max_rows = INTEGER(maxsum)[0];`
349		379
350		380
351	`sprintf(g_sql_buf[0], "[%s].[%s %s]", iname, type, varname);`	381	`sprintf(g_sql_buf[0], "[%s].[%s %s]", iname, type, varname);`
352	`nrows = _get_row_count2(g_sql_buf[0], FALSE);`	382	`nrows = _get_row_count2(g_sql_buf[0], FALSE);`
353	`if (nrows <= max_rows) max_rows = nrows;`	383	`if (nrows <= max_rows) max_rows = nrows;`
354	`else { nrows = max_rows; max_rows--; }`	384	`else { nrows = max_rows; max_rows--; }`
355		385
356	`PROTECT(ret = NEW_INTEGER(nrows)); nprotected = 1;`	386	`PROTECT(ret = NEW_INTEGER(nrows)); nprotected = 1;`
357	`PROTECT(names = NEW_CHARACTER(nrows)); nprotected++;`	387	`PROTECT(names = NEW_CHARACTER(nrows)); nprotected++;`
358		388
359	`sprintf(g_sql_buf[0], "select [%s].[%s %s].label, count(*) from "`	389	`sprintf(g_sql_buf[0], "select [%s].[%s %s].label, count(*) from "`
360	`"[%s].sdf_data join [%s].[%s %s] on [%s].sdf_data.[%s]=[%s].[%s %s].level "`	390	`"[%s].[%s] join [%s].[%s %s] on [%s].[%s].[%s]=[%s].[%s %s].level "`
361	`"group by [%s].sdf_data.[%s], [%s].[%s %s].level order by count(*) desc",`	391	`"group by [%s].[%s].[%s], [%s].[%s %s].level order by count(*) desc",`
362	`iname, type, varname, iname, iname, type, varname, iname, varname,`	392	`iname, type, varname, iname, tblname, iname, type, varname, iname, tblname, varname,`
363	`iname, type, varname, iname, varname, iname, type, varname);`	393	`iname, type, varname, iname, tblname, varname, iname, type, varname);`
364	`sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	394	`sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
365		395
366	`for (i = 0; i < max_rows; i++) {`	396	`for (i = 0; i < max_rows; i++) {`
367	`sqlite3_step(stmt);`	397	`sqlite3_step(stmt);`
368	`SET_STRING_ELT(names, i, mkChar((char *)sqlite3_column_text(stmt, 0)));`	398	`SET_STRING_ELT(names, i, mkChar((char *)sqlite3_column_text(stmt, 0)));`
369	`INTEGER(ret)[i] = sqlite3_column_int(stmt, 1);`	399	`INTEGER(ret)[i] = sqlite3_column_int(stmt, 1);`
370	`}`	400	`}`
371		401
372	`if (nrows > max_rows) {`	402	`if (nrows > max_rows) {`
373	`int others_sum = 0;`	403	`int others_sum = 0;`
374	`SET_STRING_ELT(names, nrows-1, mkChar("(Others)"));`	404	`SET_STRING_ELT(names, nrows-1, mkChar("(Others)"));`
375	`while (sqlite3_step(stmt) == SQLITE_ROW) {`	405	`while (sqlite3_step(stmt) == SQLITE_ROW) {`
376	`others_sum += sqlite3_column_int(stmt, 1);`	406	`others_sum += sqlite3_column_int(stmt, 1);`
377	`}`	407	`}`
378	`INTEGER(ret)[nrows-1] = others_sum;`	408	`INTEGER(ret)[nrows-1] = others_sum;`
379	`}`	409	`}`
380	`} else if (TEST_SDFVECTORTYPE(svec, "logical")) {`	410	`} else if (TEST_SDFVECTORTYPE(svec, "logical")) {`
381	`sprintf(g_sql_buf[0], "select count(*) from "`	411	`sprintf(g_sql_buf[0], "select count(*) from "`
382	`"[%s].sdf_data group by [%s] order by [%s]", iname, varname, varname);`	412	`"[%s].[%s] group by [%s] order by [%s]", iname, tblname, varname, varname);`
383		413
384	`PROTECT(names = NEW_CHARACTER(3)); nprotected = 1;`	414	`PROTECT(names = NEW_CHARACTER(3)); nprotected = 1;`
385	`PROTECT(ret = NEW_CHARACTER(3)); nprotected++;`	415	`PROTECT(ret = NEW_CHARACTER(3)); nprotected++;`
386		416
387	`SET_STRING_ELT(names, 0, mkChar("Mode"));`	417	`SET_STRING_ELT(names, 0, mkChar("Mode"));`
388	`SET_STRING_ELT(names, 1, mkChar("FALSE"));`	418	`SET_STRING_ELT(names, 1, mkChar("FALSE"));`
389	`SET_STRING_ELT(names, 2, mkChar("TRUE"));`	419	`SET_STRING_ELT(names, 2, mkChar("TRUE"));`
390		420
391	`sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	421	`sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
392	`SET_STRING_ELT(ret, 0, mkChar("logical"));`	422	`SET_STRING_ELT(ret, 0, mkChar("logical"));`
393	`sqlite3_step(stmt);`	423	`sqlite3_step(stmt);`
394	`SET_STRING_ELT(ret, 1, mkChar((const char *)sqlite3_column_text(stmt, 0)));`	424	`SET_STRING_ELT(ret, 1, mkChar((const char *)sqlite3_column_text(stmt, 0)));`
395	`sqlite3_step(stmt);`	425	`sqlite3_step(stmt);`
396	`SET_STRING_ELT(ret, 2, mkChar((const char *)sqlite3_column_text(stmt, 0)));`	426	`SET_STRING_ELT(ret, 2, mkChar((const char *)sqlite3_column_text(stmt, 0)));`
397		427
398	`} else return R_NilValue;`	428	`} else return R_NilValue;`
399		429
400	`sqlite3_finalize(stmt);`	430	`sqlite3_finalize(stmt);`
401	`SET_NAMES(ret, names);`	431	`SET_NAMES(ret, names);`
402	`SET_CLASS(ret, mkString("table"));`	432	`SET_CLASS(ret, mkString("table"));`
403	`UNPROTECT(nprotected);`	433	`UNPROTECT(nprotected);`
404	`return ret;`	434	`return ret;`
405	`}`	435	`}`
406		436
407		437
408	`/* the global accumulator should be safe if we only do 1 cummulative or`	438	`/* the global accumulator should be safe if we only do 1 cummulative or`
409	`* aggregate at any time. it won't work for stuffs like "select max(col)-min(col)`	439	`* aggregate at any time. it won't work for stuffs like "select max(col)-min(col)`
410	`* from sdf_data". */`	440	`* from sdf_data". */`
411	`static long double g_accumulator = 0.0; /* accumulator var for cumsum, cumprod, etc. */`	441	`static long double g_accumulator = 0.0; /* accumulator var for cumsum, cumprod, etc. */`
412	`static int g_start = 0; /* flag for start of cummulation */`	442	`static int g_start = 0; /* flag for start of cummulation */`
413	`static int g_narm = 0; /* for Summary group */`	443	`static int g_narm = 0; /* for Summary group */`
414		444
415	`void _init_sqlite_function_accumulator() {`	445	`void _init_sqlite_function_accumulator() {`
416	`g_accumulator = 0.0; /* initialize accumulator */`	446	`g_accumulator = 0.0; /* initialize accumulator */`
417	`g_start = 1; /* flag that we are at start of accumulating */`	447	`g_start = 1; /* flag that we are at start of accumulating */`
418	`}`	448	`}`
419		449
420	`SEXP sdf_do_variable_math(SEXP func, SEXP vector, SEXP other_args) {`	450	`SEXP sdf_do_variable_math(SEXP func, SEXP vector, SEXP other_args) {`
421	`char iname, iname_src, varname_src, funcname;`	451	`char iname, iname_src, varname_src, funcname;`
422	`int namelen, res;`	452	`int namelen, res;`
423	`sqlite3_stmt *stmt;`	453	`sqlite3_stmt *stmt;`
424		454
425	`/* get data from arguments (function name and sqlite.vector stuffs) */`	455	`/* get data from arguments (function name and sqlite.vector stuffs) */`
426	`funcname = CHAR_ELT(func, 0);`	456	`funcname = CHAR_ELT(func, 0);`
427	`iname_src = SDF_INAME(vector);`	457	`iname_src = SDF_INAME(vector);`
428	`varname_src = SVEC_VARNAME(vector);`	458	`varname_src = SVEC_VARNAME(vector);`
429		459
430	`if (!USE_SDF1(iname_src, TRUE, TRUE)) return R_NilValue;`	460	`if (!USE_SDF1(iname_src, TRUE, TRUE)) return R_NilValue;`
431		461
432	`/* create a new sdf, with 1 column named V1 */`	462	`/* create a new sdf, with 1 column named V1 */`
433	`iname = _create_svector1(R_NilValue, "double", &namelen, TRUE);`	463	`iname = _create_svector1(R_NilValue, "double", &namelen, TRUE);`
434		464
435	`/* insert into <newsdf>.col, row.names select func(col), rownames */`	465	`/* insert into <newsdf>.col, row.names select func(col), rownames */`
436	`if (strcmp(funcname, "round") == 0 \|\| strcmp(funcname, "signif") == 0) {`	466	`if (strcmp(funcname, "round") == 0 \|\| strcmp(funcname, "signif") == 0) {`
437	`double digits = REAL(_getListElement(other_args, "digits"))[0];`	467	`double digits = REAL(_getListElement(other_args, "digits"))[0];`
438	`sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "`	468	`sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "`
439	`"select [row name], %s([%s],?) from [%s].sdf_data", iname, funcname,`	469	`"select [row name], %s([%s],?) from [%s].sdf_data", iname, funcname,`
440	`varname_src, iname_src);`	470	`varname_src, iname_src);`
441	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	471	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
442	`if (_sqlite_error(res)) goto vecmath_prepare_error;`	472	`if (_sqlite_error(res)) goto vecmath_prepare_error;`
443	`res = sqlite3_bind_double(stmt, 1, digits);`	473	`res = sqlite3_bind_double(stmt, 1, digits);`
444	`} else if (strcmp(funcname, "log") == 0) {`	474	`} else if (strcmp(funcname, "log") == 0) {`
445	`double base = REAL(_getListElement(other_args, "base"))[0];`	475	`double base = REAL(_getListElement(other_args, "base"))[0];`
446	`sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "`	476	`sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "`
447	`"select [row name], %s([%s],?) from [%s].sdf_data", iname, funcname,`	477	`"select [row name], %s([%s],?) from [%s].sdf_data", iname, funcname,`
448	`varname_src, iname_src);`	478	`varname_src, iname_src);`
449	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	479	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
450	`if (_sqlite_error(res)) goto vecmath_prepare_error;`	480	`if (_sqlite_error(res)) goto vecmath_prepare_error;`
451	`res = sqlite3_bind_double(stmt, 1, base);`	481	`res = sqlite3_bind_double(stmt, 1, base);`
452	`} else {`	482	`} else {`
453	`sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "`	483	`sprintf(g_sql_buf[0], "insert into [%s].sdf_data([row name], V1) "`
454	`"select [row name], %s([%s]) from [%s].sdf_data", iname, funcname,`	484	`"select [row name], %s([%s]) from [%s].sdf_data", iname, funcname,`
455	`varname_src, iname_src);`	485	`varname_src, iname_src);`
456	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`	486	`res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);`
457	`}`	487	`}`
458		488
459	`if (_sqlite_error(res)) {`	489	`if (_sqlite_error(res)) {`
460	`vecmath_prepare_error:`	490	`vecmath_prepare_error:`
461	`sprintf(g_sql_buf[0], "detach %s", iname);`	491	`sprintf(g_sql_buf[0], "detach %s", iname);`
462	`_sqlite_exec(g_sql_buf[0]);`	492	`_sqlite_exec(g_sql_buf[0]);`
463		493
464	`/* we will return a string with the file name, and do file.remove`	494	`/* we will return a string with the file name, and do file.remove`
465	`* at R */`	495	`* at R */`
466	`iname[namelen] = '.';`	496	`iname[namelen] = '.';`
467	`return mkString(iname);`	497	`return mkString(iname);`
468	`}`	498	`}`
469		499
470	`_init_sqlite_function_accumulator();`	500	`_init_sqlite_function_accumulator();`

The R Project SVN R-packages

(root)/trunk/SQLiteDF/src/sqlite_vector.c – Rev 3473 → 3684