results.c
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:31k
- /* Module: results.c
- *
- * Description: This module contains functions related to
- * retrieving result information through the ODBC API.
- *
- * Classes: n/a
- *
- * API functions: SQLRowCount, SQLNumResultCols, SQLDescribeCol, SQLColAttributes,
- * SQLGetData, SQLFetch, SQLExtendedFetch,
- * SQLMoreResults(NI), SQLSetPos, SQLSetScrollOptions(NI),
- * SQLSetCursorName, SQLGetCursorName
- *
- * Comments: See "notice.txt" for copyright and license information.
- *
- */
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
- #include <string.h>
- #include "psqlodbc.h"
- #include "dlg_specific.h"
- #include "environ.h"
- #include "connection.h"
- #include "statement.h"
- #include "bind.h"
- #include "qresult.h"
- #include "convert.h"
- #include "pgtypes.h"
- #include <stdio.h>
- #ifndef WIN32
- #include "iodbc.h"
- #include "isqlext.h"
- #else
- #include <windows.h>
- #include <sqlext.h>
- #endif
- extern GLOBAL_VALUES globals;
- RETCODE SQL_API SQLRowCount(
- HSTMT hstmt,
- SDWORD FAR *pcrow)
- {
- static char *func="SQLRowCount";
- StatementClass *stmt = (StatementClass *) hstmt;
- QResultClass *res;
- char *msg, *ptr;
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- if (stmt->manual_result) {
- if (pcrow)
- *pcrow = -1;
- return SQL_SUCCESS;
- }
- if(stmt->statement_type == STMT_TYPE_SELECT) {
- if (stmt->status == STMT_FINISHED) {
- res = SC_get_Result(stmt);
- if(res && pcrow) {
- *pcrow = globals.use_declarefetch ? -1 : QR_get_num_tuples(res);
- return SQL_SUCCESS;
- }
- }
- } else {
- res = SC_get_Result(stmt);
- if (res && pcrow) {
- msg = QR_get_command(res);
- mylog("*** msg = '%s'n", msg);
- trim(msg); // get rid of trailing spaces
- ptr = strrchr(msg, ' ');
- if (ptr) {
- *pcrow = atoi(ptr+1);
- mylog("**** SQLRowCount(): THE ROWS: *pcrow = %dn", *pcrow);
- }
- else {
- *pcrow = -1;
- mylog("**** SQLRowCount(): NO ROWS: *pcrow = %dn", *pcrow);
- }
- return SQL_SUCCESS;
- }
- }
- SC_log_error(func, "Bad return value", stmt);
- return SQL_ERROR;
- }
- // This returns the number of columns associated with the database
- // attached to "hstmt".
- RETCODE SQL_API SQLNumResultCols(
- HSTMT hstmt,
- SWORD FAR *pccol)
- {
- static char *func="SQLNumResultCols";
- StatementClass *stmt = (StatementClass *) hstmt;
- QResultClass *result;
- char parse_ok;
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- SC_clear_error(stmt);
- parse_ok = FALSE;
- if (globals.parse && stmt->statement_type == STMT_TYPE_SELECT) {
- if (stmt->parse_status == STMT_PARSE_NONE) {
- mylog("SQLNumResultCols: calling parse_statement on stmt=%un", stmt);
- parse_statement(stmt);
- }
- if (stmt->parse_status != STMT_PARSE_FATAL) {
- parse_ok = TRUE;
- *pccol = stmt->nfld;
- mylog("PARSE: SQLNumResultCols: *pccol = %dn", *pccol);
- }
- }
- if ( ! parse_ok) {
- SC_pre_execute(stmt);
- result = SC_get_Result(stmt);
- mylog("SQLNumResultCols: result = %u, status = %d, numcols = %dn", result, stmt->status, result != NULL ? QR_NumResultCols(result) : -1);
- if (( ! result) || ((stmt->status != STMT_FINISHED) && (stmt->status != STMT_PREMATURE)) ) {
- /* no query has been executed on this statement */
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- stmt->errormsg = "No query has been executed with that handle";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- *pccol = QR_NumResultCols(result);
- }
- return SQL_SUCCESS;
- }
- // - - - - - - - - -
- // Return information about the database column the user wants
- // information about.
- RETCODE SQL_API SQLDescribeCol(
- HSTMT hstmt,
- UWORD icol,
- UCHAR FAR *szColName,
- SWORD cbColNameMax,
- SWORD FAR *pcbColName,
- SWORD FAR *pfSqlType,
- UDWORD FAR *pcbColDef,
- SWORD FAR *pibScale,
- SWORD FAR *pfNullable)
- {
- static char *func="SQLDescribeCol";
- /* gets all the information about a specific column */
- StatementClass *stmt = (StatementClass *) hstmt;
- QResultClass *res;
- char *col_name = NULL;
- Int4 fieldtype = 0;
- int precision = 0;
- ConnInfo *ci;
- char parse_ok;
- char buf[255];
- int len = 0;
- RETCODE result;
- mylog("%s: entering...n", func);
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- ci = &(stmt->hdbc->connInfo);
- SC_clear_error(stmt);
- /* Dont check for bookmark column. This is the responsibility
- of the driver manager.
- */
- icol--; /* use zero based column numbers */
- parse_ok = FALSE;
- if (globals.parse && stmt->statement_type == STMT_TYPE_SELECT) {
- if (stmt->parse_status == STMT_PARSE_NONE) {
- mylog("SQLDescribeCol: calling parse_statement on stmt=%un", stmt);
- parse_statement(stmt);
- }
- mylog("PARSE: DescribeCol: icol=%d, stmt=%u, stmt->nfld=%d, stmt->fi=%un", icol, stmt, stmt->nfld, stmt->fi);
- if (stmt->parse_status != STMT_PARSE_FATAL && stmt->fi && stmt->fi[icol]) {
- if (icol >= stmt->nfld) {
- stmt->errornumber = STMT_INVALID_COLUMN_NUMBER_ERROR;
- stmt->errormsg = "Invalid column number in DescribeCol.";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- mylog("DescribeCol: getting info for icol=%dn", icol);
- fieldtype = stmt->fi[icol]->type;
- col_name = stmt->fi[icol]->name;
- precision = stmt->fi[icol]->precision;
- mylog("PARSE: fieldtype=%d, col_name='%s', precision=%dn", fieldtype, col_name, precision);
- if (fieldtype > 0)
- parse_ok = TRUE;
- }
- }
- /* If couldn't parse it OR the field being described was not parsed (i.e., because
- it was a function or expression, etc, then do it the old fashioned way.
- */
- if ( ! parse_ok) {
- SC_pre_execute(stmt);
-
- res = SC_get_Result(stmt);
- mylog("**** SQLDescribeCol: res = %u, stmt->status = %d, !finished=%d, !premature=%dn", res, stmt->status, stmt->status != STMT_FINISHED, stmt->status != STMT_PREMATURE);
- if ( (NULL == res) || ((stmt->status != STMT_FINISHED) && (stmt->status != STMT_PREMATURE))) {
- /* no query has been executed on this statement */
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- stmt->errormsg = "No query has been assigned to this statement.";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (icol >= QR_NumResultCols(res)) {
- stmt->errornumber = STMT_INVALID_COLUMN_NUMBER_ERROR;
- stmt->errormsg = "Invalid column number in DescribeCol.";
- sprintf(buf, "Col#=%d, #Cols=%d", icol, QR_NumResultCols(res));
- SC_log_error(func, buf, stmt);
- return SQL_ERROR;
- }
- col_name = QR_get_fieldname(res, icol);
- fieldtype = QR_get_field_type(res, icol);
- precision = pgtype_precision(stmt, fieldtype, icol, globals.unknown_sizes); // atoi(ci->unknown_sizes)
- }
- mylog("describeCol: col %d fieldname = '%s'n", icol, col_name);
- mylog("describeCol: col %d fieldtype = %dn", icol, fieldtype);
- mylog("describeCol: col %d precision = %dn", icol, precision);
- result = SQL_SUCCESS;
- /************************/
- /* COLUMN NAME */
- /************************/
- len = strlen(col_name);
- if (pcbColName)
- *pcbColName = len;
- if (szColName) {
- strncpy_null(szColName, col_name, cbColNameMax);
- if (len >= cbColNameMax) {
- result = SQL_SUCCESS_WITH_INFO;
- stmt->errornumber = STMT_TRUNCATED;
- stmt->errormsg = "The buffer was too small for the result.";
- }
- }
- /************************/
- /* SQL TYPE */
- /************************/
- if (pfSqlType) {
- *pfSqlType = pgtype_to_sqltype(stmt, fieldtype);
- mylog("describeCol: col %d *pfSqlType = %dn", icol, *pfSqlType);
- }
- /************************/
- /* PRECISION */
- /************************/
- if (pcbColDef) {
- if ( precision < 0)
- precision = 0; // "I dont know"
- *pcbColDef = precision;
- mylog("describeCol: col %d *pcbColDef = %dn", icol, *pcbColDef);
- }
- /************************/
- /* SCALE */
- /************************/
- if (pibScale) {
- Int2 scale;
- scale = pgtype_scale(stmt, fieldtype);
- if(scale == -1) { scale = 0; }
-
- *pibScale = scale;
- mylog("describeCol: col %d *pibScale = %dn", icol, *pibScale);
- }
- /************************/
- /* NULLABILITY */
- /************************/
- if (pfNullable) {
- *pfNullable = (parse_ok) ? stmt->fi[icol]->nullable : pgtype_nullable(stmt, fieldtype);
- mylog("describeCol: col %d *pfNullable = %dn", icol, *pfNullable);
- }
- return result;
- }
- // Returns result column descriptor information for a result set.
- RETCODE SQL_API SQLColAttributes(
- HSTMT hstmt,
- UWORD icol,
- UWORD fDescType,
- PTR rgbDesc,
- SWORD cbDescMax,
- SWORD FAR *pcbDesc,
- SDWORD FAR *pfDesc)
- {
- static char *func = "SQLColAttributes";
- StatementClass *stmt = (StatementClass *) hstmt;
- Int4 field_type = 0;
- ConnInfo *ci;
- int unknown_sizes;
- int cols = 0;
- char parse_ok;
- RETCODE result;
- char *p = NULL;
- int len = 0, value = 0;
- mylog("%s: entering...n", func);
- if( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- ci = &(stmt->hdbc->connInfo);
- /* Dont check for bookmark column. This is the responsibility
- of the driver manager. For certain types of arguments, the column
- number is ignored anyway, so it may be 0.
- */
- icol--;
- unknown_sizes = globals.unknown_sizes; // atoi(ci->unknown_sizes);
- if (unknown_sizes == UNKNOWNS_AS_DONTKNOW) // not appropriate for SQLColAttributes()
- unknown_sizes = UNKNOWNS_AS_MAX;
- parse_ok = FALSE;
- if (globals.parse && stmt->statement_type == STMT_TYPE_SELECT) {
- if (stmt->parse_status == STMT_PARSE_NONE) {
- mylog("SQLColAttributes: calling parse_statementn");
- parse_statement(stmt);
- }
- cols = stmt->nfld;
- /* Column Count is a special case. The Column number is ignored
- in this case.
- */
- if (fDescType == SQL_COLUMN_COUNT) {
- if (pfDesc)
- *pfDesc = cols;
- return SQL_SUCCESS;
- }
- if (stmt->parse_status != STMT_PARSE_FATAL && stmt->fi && stmt->fi[icol]) {
- if (icol >= cols) {
- stmt->errornumber = STMT_INVALID_COLUMN_NUMBER_ERROR;
- stmt->errormsg = "Invalid column number in DescribeCol.";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- field_type = stmt->fi[icol]->type;
- if (field_type > 0)
- parse_ok = TRUE;
- }
- }
- if ( ! parse_ok) {
- SC_pre_execute(stmt);
- mylog("**** SQLColAtt: result = %u, status = %d, numcols = %dn", stmt->result, stmt->status, stmt->result != NULL ? QR_NumResultCols(stmt->result) : -1);
- if ( (NULL == stmt->result) || ((stmt->status != STMT_FINISHED) && (stmt->status != STMT_PREMATURE)) ) {
- stmt->errormsg = "Can't get column attributes: no result found.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- cols = QR_NumResultCols(stmt->result);
- /* Column Count is a special case. The Column number is ignored
- in this case.
- */
- if (fDescType == SQL_COLUMN_COUNT) {
- if (pfDesc)
- *pfDesc = cols;
- return SQL_SUCCESS;
- }
- if (icol >= cols) {
- stmt->errornumber = STMT_INVALID_COLUMN_NUMBER_ERROR;
- stmt->errormsg = "Invalid column number in DescribeCol.";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- field_type = QR_get_field_type(stmt->result, icol);
- }
- mylog("colAttr: col %d field_type = %dn", icol, field_type);
- switch(fDescType) {
- case SQL_COLUMN_AUTO_INCREMENT:
- value = pgtype_auto_increment(stmt, field_type);
- if (value == -1) /* non-numeric becomes FALSE (ODBC Doc) */
- value = FALSE;
-
- break;
- case SQL_COLUMN_CASE_SENSITIVE:
- value = pgtype_case_sensitive(stmt, field_type);
- break;
- /* This special case is handled above.
- case SQL_COLUMN_COUNT:
- */
- case SQL_COLUMN_DISPLAY_SIZE:
- value = (parse_ok) ? stmt->fi[icol]->display_size : pgtype_display_size(stmt, field_type, icol, unknown_sizes);
- mylog("SQLColAttributes: col %d, display_size= %dn", icol, value);
- break;
- case SQL_COLUMN_LABEL:
- if (parse_ok && stmt->fi[icol]->alias[0] != ' ') {
- p = stmt->fi[icol]->alias;
- mylog("SQLColAttr: COLUMN_LABEL = '%s'n", p);
- break;
- } // otherwise same as column name -- FALL THROUGH!!!
- case SQL_COLUMN_NAME:
- p = (parse_ok) ? stmt->fi[icol]->name : QR_get_fieldname(stmt->result, icol);
- mylog("SQLColAttr: COLUMN_NAME = '%s'n", p);
- break;
- case SQL_COLUMN_LENGTH:
- value = (parse_ok) ? stmt->fi[icol]->length : pgtype_length(stmt, field_type, icol, unknown_sizes);
- mylog("SQLColAttributes: col %d, length = %dn", icol, value);
- break;
- case SQL_COLUMN_MONEY:
- value = pgtype_money(stmt, field_type);
- break;
- case SQL_COLUMN_NULLABLE:
- value = (parse_ok) ? stmt->fi[icol]->nullable : pgtype_nullable(stmt, field_type);
- break;
- case SQL_COLUMN_OWNER_NAME:
- p = "";
- break;
- case SQL_COLUMN_PRECISION:
- value = (parse_ok) ? stmt->fi[icol]->precision : pgtype_precision(stmt, field_type, icol, unknown_sizes);
- mylog("SQLColAttributes: col %d, precision = %dn", icol, value);
- break;
- case SQL_COLUMN_QUALIFIER_NAME:
- p = "";
- break;
- case SQL_COLUMN_SCALE:
- value = pgtype_scale(stmt, field_type);
- break;
- case SQL_COLUMN_SEARCHABLE:
- value = pgtype_searchable(stmt, field_type);
- break;
- case SQL_COLUMN_TABLE_NAME:
- p = (parse_ok && stmt->fi[icol]->ti) ? stmt->fi[icol]->ti->name : "";
- mylog("SQLColAttr: TABLE_NAME = '%s'n", p);
- break;
- case SQL_COLUMN_TYPE:
- value = pgtype_to_sqltype(stmt, field_type);
- break;
- case SQL_COLUMN_TYPE_NAME:
- p = pgtype_to_name(stmt, field_type);
- break;
- case SQL_COLUMN_UNSIGNED:
- value = pgtype_unsigned(stmt, field_type);
- if(value == -1) /* non-numeric becomes TRUE (ODBC Doc) */
- value = TRUE;
- break;
- case SQL_COLUMN_UPDATABLE:
- /* Neither Access or Borland care about this.
- if (field_type == PG_TYPE_OID)
- *pfDesc = SQL_ATTR_READONLY;
- else
- */
- value = SQL_ATTR_WRITE;
- mylog("SQLColAttr: UPDATEABLE = %dn", value);
- break;
- }
- result = SQL_SUCCESS;
- if (p) { /* char/binary data */
- len = strlen(p);
- if (rgbDesc) {
- strncpy_null((char *)rgbDesc, p, (size_t)cbDescMax);
- if (len >= cbDescMax) {
- result = SQL_SUCCESS_WITH_INFO;
- stmt->errornumber = STMT_TRUNCATED;
- stmt->errormsg = "The buffer was too small for the result.";
- }
- }
- if (pcbDesc)
- *pcbDesc = len;
- }
- else { /* numeric data */
- if (pfDesc)
- *pfDesc = value;
- }
- return result;
- }
- // Returns result data for a single column in the current row.
- RETCODE SQL_API SQLGetData(
- HSTMT hstmt,
- UWORD icol,
- SWORD fCType,
- PTR rgbValue,
- SDWORD cbValueMax,
- SDWORD FAR *pcbValue)
- {
- static char *func="SQLGetData";
- QResultClass *res;
- StatementClass *stmt = (StatementClass *) hstmt;
- int num_cols, num_rows;
- Int4 field_type;
- void *value;
- int result;
- char get_bookmark = FALSE;
- mylog("SQLGetData: enter, stmt=%un", stmt);
- if( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- res = stmt->result;
- if (STMT_EXECUTING == stmt->status) {
- stmt->errormsg = "Can't get data while statement is still executing.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->status != STMT_FINISHED) {
- stmt->errornumber = STMT_STATUS_ERROR;
- stmt->errormsg = "GetData can only be called after the successful execution on a SQL statement";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (icol == 0) {
- if (stmt->options.use_bookmarks == SQL_UB_OFF) {
- stmt->errornumber = STMT_COLNUM_ERROR;
- stmt->errormsg = "Attempt to retrieve bookmark with bookmark usage disabled";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- /* Make sure it is the bookmark data type */
- if (fCType != SQL_C_BOOKMARK) {
- stmt->errormsg = "Column 0 is not of type SQL_C_BOOKMARK";
- stmt->errornumber = STMT_PROGRAM_TYPE_OUT_OF_RANGE;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
-
- get_bookmark = TRUE;
- }
- else {
- // use zero-based column numbers
- icol--;
- // make sure the column number is valid
- num_cols = QR_NumResultCols(res);
- if (icol >= num_cols) {
- stmt->errormsg = "Invalid column number.";
- stmt->errornumber = STMT_INVALID_COLUMN_NUMBER_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- }
- if ( stmt->manual_result || ! globals.use_declarefetch) {
- // make sure we're positioned on a valid row
- num_rows = QR_get_num_tuples(res);
- if((stmt->currTuple < 0) ||
- (stmt->currTuple >= num_rows)) {
- stmt->errormsg = "Not positioned on a valid row for GetData.";
- stmt->errornumber = STMT_INVALID_CURSOR_STATE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- mylog(" num_rows = %dn", num_rows);
- if ( ! get_bookmark) {
- if ( stmt->manual_result) {
- value = QR_get_value_manual(res, stmt->currTuple, icol);
- }
- else {
- value = QR_get_value_backend_row(res, stmt->currTuple, icol);
- }
- mylog(" value = '%s'n", value);
- }
- }
- else { /* its a SOCKET result (backend data) */
- if (stmt->currTuple == -1 || ! res || ! res->tupleField) {
- stmt->errormsg = "Not positioned on a valid row for GetData.";
- stmt->errornumber = STMT_INVALID_CURSOR_STATE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if ( ! get_bookmark)
- value = QR_get_value_backend(res, icol);
- mylog(" socket: value = '%s'n", value);
- }
- if ( get_bookmark) {
- *((UDWORD *) rgbValue) = SC_get_bookmark(stmt);
- if (pcbValue)
- *pcbValue = 4;
- return SQL_SUCCESS;
- }
- field_type = QR_get_field_type(res, icol);
- mylog("**** SQLGetData: icol = %d, fCType = %d, field_type = %d, value = '%s'n", icol, fCType, field_type, value);
- stmt->current_col = icol;
- result = copy_and_convert_field(stmt, field_type, value,
- fCType, rgbValue, cbValueMax, pcbValue);
- stmt->current_col = -1;
- switch(result) {
- case COPY_OK:
- return SQL_SUCCESS;
- case COPY_UNSUPPORTED_TYPE:
- stmt->errormsg = "Received an unsupported type from Postgres.";
- stmt->errornumber = STMT_RESTRICTED_DATA_TYPE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- case COPY_UNSUPPORTED_CONVERSION:
- stmt->errormsg = "Couldn't handle the necessary data type conversion.";
- stmt->errornumber = STMT_RESTRICTED_DATA_TYPE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- case COPY_RESULT_TRUNCATED:
- stmt->errornumber = STMT_TRUNCATED;
- stmt->errormsg = "The buffer was too small for the result.";
- return SQL_SUCCESS_WITH_INFO;
- case COPY_GENERAL_ERROR: /* error msg already filled in */
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- case COPY_NO_DATA_FOUND:
- /* SC_log_error(func, "no data found", stmt); */
- return SQL_NO_DATA_FOUND;
- default:
- stmt->errormsg = "Unrecognized return value from copy_and_convert_field.";
- stmt->errornumber = STMT_INTERNAL_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- }
- // Returns data for bound columns in the current row ("hstmt->iCursor"),
- // advances the cursor.
- RETCODE SQL_API SQLFetch(
- HSTMT hstmt)
- {
- static char *func = "SQLFetch";
- StatementClass *stmt = (StatementClass *) hstmt;
- QResultClass *res;
- mylog("SQLFetch: stmt = %u, stmt->result= %un", stmt, stmt->result);
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- SC_clear_error(stmt);
- if ( ! (res = stmt->result)) {
- stmt->errormsg = "Null statement result in SQLFetch.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- /* Not allowed to bind a bookmark column when using SQLFetch. */
- if ( stmt->bookmark.buffer) {
- stmt->errornumber = STMT_COLNUM_ERROR;
- stmt->errormsg = "Not allowed to bind a bookmark column when using SQLFetch";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->status == STMT_EXECUTING) {
- stmt->errormsg = "Can't fetch while statement is still executing.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->status != STMT_FINISHED) {
- stmt->errornumber = STMT_STATUS_ERROR;
- stmt->errormsg = "Fetch can only be called after the successful execution on a SQL statement";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->bindings == NULL) {
- // just to avoid a crash if the user insists on calling this
- // function even if SQL_ExecDirect has reported an Error
- stmt->errormsg = "Bindings were not allocated properly.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- QR_set_rowset_size(res, 1);
- QR_inc_base(res, stmt->last_fetch_count);
- return SC_fetch(stmt);
- }
- // This fetchs a block of data (rowset).
- RETCODE SQL_API SQLExtendedFetch(
- HSTMT hstmt,
- UWORD fFetchType,
- SDWORD irow,
- UDWORD FAR *pcrow,
- UWORD FAR *rgfRowStatus)
- {
- static char *func = "SQLExtendedFetch";
- StatementClass *stmt = (StatementClass *) hstmt;
- QResultClass *res;
- int num_tuples, i, save_rowset_size;
- RETCODE result;
- char truncated, error;
- mylog("SQLExtendedFetch: stmt=%un", stmt);
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- if ( globals.use_declarefetch && ! stmt->manual_result) {
- if ( fFetchType != SQL_FETCH_NEXT) {
- stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
- stmt->errormsg = "Unsupported fetch type for SQLExtendedFetch with UseDeclareFetch option.";
- return SQL_ERROR;
- }
- }
- SC_clear_error(stmt);
- if ( ! (res = stmt->result)) {
- stmt->errormsg = "Null statement result in SQLExtendedFetch.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- /* If a bookmark colunmn is bound but bookmark usage is off, then error */
- if (stmt->bookmark.buffer && stmt->options.use_bookmarks == SQL_UB_OFF) {
- stmt->errornumber = STMT_COLNUM_ERROR;
- stmt->errormsg = "Attempt to retrieve bookmark with bookmark usage disabled";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->status == STMT_EXECUTING) {
- stmt->errormsg = "Can't fetch while statement is still executing.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->status != STMT_FINISHED) {
- stmt->errornumber = STMT_STATUS_ERROR;
- stmt->errormsg = "ExtendedFetch can only be called after the successful execution on a SQL statement";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (stmt->bindings == NULL) {
- // just to avoid a crash if the user insists on calling this
- // function even if SQL_ExecDirect has reported an Error
- stmt->errormsg = "Bindings were not allocated properly.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- /* Initialize to no rows fetched */
- if (rgfRowStatus)
- for (i = 0; i < stmt->options.rowset_size; i++)
- *(rgfRowStatus + i) = SQL_ROW_NOROW;
- if (pcrow)
- *pcrow = 0;
- num_tuples = QR_get_num_tuples(res);
- /* Save and discard the saved rowset size */
- save_rowset_size = stmt->save_rowset_size;
- stmt->save_rowset_size = -1;
- switch (fFetchType) {
- case SQL_FETCH_NEXT:
- /* From the odbc spec... If positioned before the start of the RESULT SET,
- then this should be equivalent to SQL_FETCH_FIRST.
- */
- if (stmt->rowset_start < 0)
- stmt->rowset_start = 0;
- else {
-
- stmt->rowset_start += (save_rowset_size > 0 ? save_rowset_size : stmt->options.rowset_size);
- }
- mylog("SQL_FETCH_NEXT: num_tuples=%d, currtuple=%dn", num_tuples, stmt->currTuple);
- break;
- case SQL_FETCH_PRIOR:
- mylog("SQL_FETCH_PRIOR: num_tuples=%d, currtuple=%dn", num_tuples, stmt->currTuple);
- /* From the odbc spec... If positioned after the end of the RESULT SET,
- then this should be equivalent to SQL_FETCH_LAST.
- */
- if (stmt->rowset_start >= num_tuples) {
- stmt->rowset_start = num_tuples <= 0 ? 0 : (num_tuples - stmt->options.rowset_size);
- }
- else {
- stmt->rowset_start -= stmt->options.rowset_size;
- }
- break;
- case SQL_FETCH_FIRST:
- mylog("SQL_FETCH_FIRST: num_tuples=%d, currtuple=%dn", num_tuples, stmt->currTuple);
- stmt->rowset_start = 0;
- break;
- case SQL_FETCH_LAST:
- mylog("SQL_FETCH_LAST: num_tuples=%d, currtuple=%dn", num_tuples, stmt->currTuple);
- stmt->rowset_start = num_tuples <= 0 ? 0 : (num_tuples - stmt->options.rowset_size) ;
- break;
- case SQL_FETCH_ABSOLUTE:
- mylog("SQL_FETCH_ABSOLUTE: num_tuples=%d, currtuple=%d, irow=%dn", num_tuples, stmt->currTuple, irow);
- /* Position before result set, but dont fetch anything */
- if (irow == 0) {
- stmt->rowset_start = -1;
- stmt->currTuple = -1;
- return SQL_NO_DATA_FOUND;
- }
- /* Position before the desired row */
- else if (irow > 0) {
- stmt->rowset_start = irow - 1;
- }
- /* Position with respect to the end of the result set */
- else {
- stmt->rowset_start = num_tuples + irow;
- }
- break;
- case SQL_FETCH_RELATIVE:
-
- /* Refresh the current rowset -- not currently implemented, but lie anyway */
- if (irow == 0) {
- break;
- }
- stmt->rowset_start += irow;
-
- break;
- case SQL_FETCH_BOOKMARK:
- stmt->rowset_start = irow - 1;
- break;
- default:
- SC_log_error(func, "Unsupported SQLExtendedFetch Direction", stmt);
- return SQL_ERROR;
- }
- /***********************************/
- /* CHECK FOR PROPER CURSOR STATE */
- /***********************************/
- /* Handle Declare Fetch style specially because the end is not really the end... */
- if ( globals.use_declarefetch && ! stmt->manual_result) {
- if (QR_end_tuples(res)) {
- return SQL_NO_DATA_FOUND;
- }
- }
- else {
- /* If *new* rowset is after the result_set, return no data found */
- if (stmt->rowset_start >= num_tuples) {
- stmt->rowset_start = num_tuples;
- return SQL_NO_DATA_FOUND;
- }
- }
- /* If *new* rowset is prior to result_set, return no data found */
- if (stmt->rowset_start < 0) {
- if (stmt->rowset_start + stmt->options.rowset_size <= 0) {
- stmt->rowset_start = -1;
- return SQL_NO_DATA_FOUND;
- }
- else { /* overlap with beginning of result set, so get first rowset */
- stmt->rowset_start = 0;
- }
- }
- /* currTuple is always 1 row prior to the rowset */
- stmt->currTuple = stmt->rowset_start - 1;
- /* increment the base row in the tuple cache */
- QR_set_rowset_size(res, stmt->options.rowset_size);
- QR_inc_base(res, stmt->last_fetch_count);
-
- /* Physical Row advancement occurs for each row fetched below */
- mylog("SQLExtendedFetch: new currTuple = %dn", stmt->currTuple);
- truncated = error = FALSE;
- for (i = 0; i < stmt->options.rowset_size; i++) {
- stmt->bind_row = i; // set the binding location
- result = SC_fetch(stmt);
- /* Determine Function status */
- if (result == SQL_NO_DATA_FOUND)
- break;
- else if (result == SQL_SUCCESS_WITH_INFO)
- truncated = TRUE;
- else if (result == SQL_ERROR)
- error = TRUE;
- /* Determine Row Status */
- if (rgfRowStatus) {
- if (result == SQL_ERROR)
- *(rgfRowStatus + i) = SQL_ROW_ERROR;
- else
- *(rgfRowStatus + i)= SQL_ROW_SUCCESS;
- }
- }
- /* Save the fetch count for SQLSetPos */
- stmt->last_fetch_count= i;
- /* Reset next binding row */
- stmt->bind_row = 0;
- /* Move the cursor position to the first row in the result set. */
- stmt->currTuple = stmt->rowset_start;
- /* For declare/fetch, need to reset cursor to beginning of rowset */
- if (globals.use_declarefetch && ! stmt->manual_result) {
- QR_set_position(res, 0);
- }
- /* Set the number of rows retrieved */
- if (pcrow)
- *pcrow = i;
- if (i == 0)
- return SQL_NO_DATA_FOUND; /* Only DeclareFetch should wind up here */
- else if (error)
- return SQL_ERROR;
- else if (truncated)
- return SQL_SUCCESS_WITH_INFO;
- else
- return SQL_SUCCESS;
- }
- // This determines whether there are more results sets available for
- // the "hstmt".
- /* CC: return SQL_NO_DATA_FOUND since we do not support multiple result sets */
- RETCODE SQL_API SQLMoreResults(
- HSTMT hstmt)
- {
- return SQL_NO_DATA_FOUND;
- }
- // This positions the cursor within a rowset, that was positioned using SQLExtendedFetch.
- // This will be useful (so far) only when using SQLGetData after SQLExtendedFetch.
- RETCODE SQL_API SQLSetPos(
- HSTMT hstmt,
- UWORD irow,
- UWORD fOption,
- UWORD fLock)
- {
- static char *func = "SQLSetPos";
- StatementClass *stmt = (StatementClass *) hstmt;
- QResultClass *res;
- int num_cols, i;
- BindInfoClass *bindings = stmt->bindings;
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- if (fOption != SQL_POSITION && fOption != SQL_REFRESH) {
- stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
- stmt->errormsg = "Only SQL_POSITION/REFRESH is supported for SQLSetPos";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if ( ! (res = stmt->result)) {
- stmt->errormsg = "Null statement result in SQLSetPos.";
- stmt->errornumber = STMT_SEQUENCE_ERROR;
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- num_cols = QR_NumResultCols(res);
- if (irow == 0) {
- stmt->errornumber = STMT_ROW_OUT_OF_RANGE;
- stmt->errormsg = "Driver does not support Bulk operations.";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- if (irow > stmt->last_fetch_count) {
- stmt->errornumber = STMT_ROW_OUT_OF_RANGE;
- stmt->errormsg = "Row value out of range";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- irow--;
- /* Reset for SQLGetData */
- for (i = 0; i < num_cols; i++)
- bindings[i].data_left = -1;
- QR_set_position(res, irow);
- stmt->currTuple = stmt->rowset_start + irow;
- return SQL_SUCCESS;
- }
- // Sets options that control the behavior of cursors.
- RETCODE SQL_API SQLSetScrollOptions(
- HSTMT hstmt,
- UWORD fConcurrency,
- SDWORD crowKeyset,
- UWORD crowRowset)
- {
- static char *func = "SQLSetScrollOptions";
- SC_log_error(func, "Function not implemented", (StatementClass *) hstmt);
- return SQL_ERROR;
- }
- // Set the cursor name on a statement handle
- RETCODE SQL_API SQLSetCursorName(
- HSTMT hstmt,
- UCHAR FAR *szCursor,
- SWORD cbCursor)
- {
- static char *func="SQLSetCursorName";
- StatementClass *stmt = (StatementClass *) hstmt;
- int len;
- mylog("SQLSetCursorName: hstmt=%u, szCursor=%u, cbCursorMax=%dn", hstmt, szCursor, cbCursor);
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- len = (cbCursor == SQL_NTS) ? strlen(szCursor) : cbCursor;
- if (len <= 0 || len > sizeof(stmt->cursor_name) - 1) {
- stmt->errornumber = STMT_INVALID_CURSOR_NAME;
- stmt->errormsg = "Invalid Cursor Name";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- strncpy_null(stmt->cursor_name, szCursor, len+1);
- return SQL_SUCCESS;
- }
- // Return the cursor name for a statement handle
- RETCODE SQL_API SQLGetCursorName(
- HSTMT hstmt,
- UCHAR FAR *szCursor,
- SWORD cbCursorMax,
- SWORD FAR *pcbCursor)
- {
- static char *func="SQLGetCursorName";
- StatementClass *stmt = (StatementClass *) hstmt;
- int len = 0;
- RETCODE result;
- mylog("SQLGetCursorName: hstmt=%u, szCursor=%u, cbCursorMax=%d, pcbCursor=%un", hstmt, szCursor, cbCursorMax, pcbCursor);
- if ( ! stmt) {
- SC_log_error(func, "", NULL);
- return SQL_INVALID_HANDLE;
- }
- if ( stmt->cursor_name[0] == ' ') {
- stmt->errornumber = STMT_NO_CURSOR_NAME;
- stmt->errormsg = "No Cursor name available";
- SC_log_error(func, "", stmt);
- return SQL_ERROR;
- }
- result = SQL_SUCCESS;
- len = strlen(stmt->cursor_name);
- if (szCursor) {
- strncpy_null(szCursor, stmt->cursor_name, cbCursorMax);
- if (len >= cbCursorMax) {
- result = SQL_SUCCESS_WITH_INFO;
- stmt->errornumber = STMT_TRUNCATED;
- stmt->errormsg = "The buffer was too small for the result.";
- }
- }
- if (pcbCursor)
- *pcbCursor = len;
- return result;
- }