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Rev 3684 Rev 3808
Line 1089... Line 1089...
1089 
    return ret;
 1089 
    return ret;
1090 
}
 1090 
}
1091 
 
 1091 
 
1092 
 
 1092 
 
1093 
SEXP sdf_sort_variable(SEXP svec, SEXP decreasing) {
 1093 
SEXP sdf_sort_variable(SEXP svec, SEXP decreasing) {
1094 
    char *iname, *iname_src, *varname_src, *type;
 1094 
    char *iname, *tblname, *varname, *type, *sort_type, *iname2;
1095 
    sqlite3_stmt *stmt;
 1095 
    sqlite3_stmt *stmt;
1096 
    int res;
 1096 
    int res;
1097 
 
 1097 
 
1098 
    iname_src = SDF_INAME(svec);
 1098 
    iname = SDF_INAME(svec);
- 
 
 1099 
    tblname = SVEC_TBLNAME(svec);
1099 
    varname_src = SVEC_VARNAME(svec);
 1100 
    varname = SVEC_VARNAME(svec);
1100 
 
 1101 
 
1101 
    if (!USE_SDF1(iname_src, TRUE, TRUE)) return R_NilValue;
 1102 
    if (!USE_SDF1(iname, TRUE, TRUE)) return R_NilValue;
1102 
 
 1103 
 
1103 
    /* determine type of svec */
 1104 
    /* determine type of svec */
1104 
    sprintf(g_sql_buf[0], "select [%s] from [%s].sdf_data limit 1", varname_src, iname_src);
 1105 
    sprintf(g_sql_buf[0], "select [%s] from [%s].[%s] limit 1", varname, iname, tblname);
1105 
    res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
 1106 
    res = sqlite3_prepare(g_workspace, g_sql_buf[0], -1, &stmt, 0);
1106 
    _sqlite_error(res);
 1107 
    _sqlite_error(res);
1107 
    sqlite3_step(stmt);
 1108 
    sqlite3_step(stmt);
1108 
    strcpy(g_sql_buf[0], sqlite3_column_decltype(stmt, 0));
 1109 
    strcpy(g_sql_buf[0], sqlite3_column_decltype(stmt, 0));
1109 
    sqlite3_finalize(stmt);
 1110 
    sqlite3_finalize(stmt);
1110 
 
 1111 
 
1111 
    /* create a new vector of that type */
 - 
 
1112 
    iname = _create_svector1(mkString("tmp_sort"), g_sql_buf[0], NULL, TRUE);
 - 
 
1113 
 
 - 
 
1114 
    /* insert to new sdf ordered */
 - 
 
1115 
    sprintf(g_sql_buf[0], "insert into [%s].sdf_data "
 - 
 
1116 
            "select [row name], [%s] from [%s].sdf_data "
 - 
 
1117 
            "order by [%s] %s", iname, varname_src, iname_src, varname_src,
 - 
 
1118 
            (LOGICAL(decreasing)[0]) ? "desc" : "asc");
 - 
 
1119 
    res = _sqlite_exec(g_sql_buf[0]);
 - 
 
1120 
    _sqlite_error(res);
 - 
 
1121 
 
 - 
 
1122 
    if (TEST_SDFVECTORTYPE(svec, "factor")) { /* copy factor table to iname */
 1112 
    if (TEST_SDFVECTORTYPE(svec, "factor")) { /* copy factor table to iname */
1123 
        if (TEST_SDFVECTORTYPE(svec, "ordered")) type = "ordered";
 1113 
        if (TEST_SDFVECTORTYPE(svec, "ordered")) type = "ordered";
1124 
        else type = "factor";
 1114 
        else type = "factor";
1125 
        _copy_factor_levels2(type, iname_src, varname_src, iname, "V1");
 1115 
        _copy_factor_levels2(type, iname, varname, iname, "V1");
1126 
    } else type = CHAR_ELT(GET_SDFVECTORTYPE(svec), 0);
 1116 
    } else type = CHAR_ELT(GET_SDFVECTORTYPE(svec), 0);
1127 
 
 1117 
 
- 
 
 1118 
    if (strcmp(tblname, "sdf_data") == 0) {
- 
 
 1119 
        /* cache sorted data if column to be sorted comes from main sdf_data */
- 
 
 1120 
 
- 
 
 1121 
        /* test if there is already a sort_varname table */
- 
 
 1122 
        sort_type = (LOGICAL(decreasing)[0]) ? "desc" : "asc";
- 
 
 1123 
        sprintf(g_sql_buf[1], "select count(*) from [%s].sqlite_master "
- 
 
 1124 
                "where type='table' and name='sort_%s_%s'", iname, sort_type, varname);
- 
 
 1125 
        sqlite3_prepare(g_workspace, g_sql_buf[1], -1, &stmt, NULL);
- 
 
 1126 
        sqlite3_step(stmt);
- 
 
 1127 
        res = sqlite3_column_int(stmt, 0);
1128 
    UNUSE_SDF2(iname_src);
 1128 
        sqlite3_finalize(stmt);
- 
 
 1129 
 
- 
 
 1130 
        if (res == 0) {
- 
 
 1131 
            sprintf(g_sql_buf[1], "create table [%s].[sort_%s_%s] ([%s] %s)",
- 
 
 1132 
                    iname, sort_type, varname, varname, g_sql_buf[0]);
- 
 
 1133 
            if (_sqlite_error(_sqlite_exec(g_sql_buf[1])))
- 
 
 1134 
                    error("Can't create table: %s", g_sql_buf[1]);
- 
 
 1135 
 
- 
 
 1136 
            /* insert to new sdf ordered */
- 
 
 1137 
            sprintf(g_sql_buf[0], "insert into [%s].[sort_%s_%s] "
- 
 
 1138 
                    "select [%s] from [%s].[%s] order by [%s] %s",
- 
 
 1139 
                    iname, sort_type, varname, varname, iname, tblname, varname, sort_type);
- 
 
 1140
- 
 
 1141 
            res = _sqlite_exec(g_sql_buf[0]);
- 
 
 1142 
            if (_sqlite_error(res)) error("Can't insert: %s", g_sql_buf[0]);
- 
 
 1143 
        }
- 
 
 1144 
 
1129 
    UNUSE_SDF2(iname);
 1145 
        UNUSE_SDF2(iname);
- 
 
 1146 
        sprintf(g_sql_buf[0], "sort_%s_%s", sort_type, varname);
- 
 
 1147 
        return _create_svector_sexp(iname, g_sql_buf[0], varname, type);
- 
 
 1148 
    } else {
- 
 
 1149 
        /* create a new sdf table, copy data to that */
- 
 
 1150 
 
- 
 
 1151 
        /* create a sorted column */
- 
 
 1152 
 
- 
 
 1153 
        error("Not yet supported.");
- 
 
 1154 
    }
1130 
 
 1155 
 
1131 
    return _create_svector_sexp(iname, "sdf_data", "V1", type);
 1156 
    return R_NilValue;
1132 
}
 1157 
}
1133 
 
 1158 
 
1134 
/****************************************************************************
 1159 
/****************************************************************************
1135 
 * VECTOR MATH/OPS/GROUP OPERATIONS
 1160 
 * VECTOR MATH/OPS/GROUP OPERATIONS
1136 
 ****************************************************************************/
 1161 
 ****************************************************************************/