- // Append a list of columns to be updated
- int i;
- for (i = 0; i < noCols; i++)
- {
- // Only append Updateable columns
- if (colDefs[i].Updateable)
- {
- if (! firstColumn)
- wxStrcat(pSqlStmt, ",");
- else
- firstColumn = FALSE;
- wxStrcat(pSqlStmt, colDefs[i].ColName);
- wxStrcat(pSqlStmt, " = ?");
- }
- }
-
- // Append the WHERE clause to the SQL UPDATE statement
- wxStrcat(pSqlStmt, " WHERE ");
- switch(typeOfUpd)
- {
- case DB_UPD_KEYFIELDS:
- // If the datasource supports the ROWID column, build
- // the where on ROWID for efficiency purposes.
- // e.g. UPDATE PARTS SET Col1 = ?, Col2 = ? WHERE ROWID = '111.222.333'
- if (CanUpdByROWID())
- {
- SDWORD cb;
- char rowid[wxDB_ROWID_LEN];
-
- // Get the ROWID value. If not successful retreiving the ROWID,
- // simply fall down through the code and build the WHERE clause
- // based on the key fields.
- if (SQLGetData(hstmt, noCols+1, SQL_C_CHAR, (UCHAR*) rowid, wxDB_ROWID_LEN, &cb) == SQL_SUCCESS)
- {
- wxStrcat(pSqlStmt, "ROWID = '");
- wxStrcat(pSqlStmt, rowid);
- wxStrcat(pSqlStmt, "'");
- break;
- }
- }
- // Unable to delete by ROWID, so build a WHERE
- // clause based on the keyfields.
- BuildWhereClause(whereClause, DB_WHERE_KEYFIELDS);
- wxStrcat(pSqlStmt, whereClause);
- break;
- case DB_UPD_WHERE:
- wxStrcat(pSqlStmt, pWhereClause);
- break;
- }
-} // BuildUpdateStmt()
-
-
-/********** wxDbTable::BuildDeleteStmt() **********/
-void wxDbTable::BuildDeleteStmt(char *pSqlStmt, int typeOfDel, const char *pWhereClause)
-{
- assert(!queryOnly);
- if (queryOnly)
- return;
-
- char whereClause[DB_MAX_WHERE_CLAUSE_LEN];
-
- whereClause[0] = 0;
-
- // Handle the case of DeleteWhere() and the where clause is blank. It should
- // delete all records from the database in this case.
- if (typeOfDel == DB_DEL_WHERE && (pWhereClause == 0 || wxStrlen(pWhereClause) == 0))
- {
- sprintf(pSqlStmt, "DELETE FROM %s", tableName);
- return;
- }
-
- sprintf(pSqlStmt, "DELETE FROM %s WHERE ", tableName);
-
- // Append the WHERE clause to the SQL DELETE statement
- switch(typeOfDel)
- {
- case DB_DEL_KEYFIELDS:
- // If the datasource supports the ROWID column, build
- // the where on ROWID for efficiency purposes.
- // e.g. DELETE FROM PARTS WHERE ROWID = '111.222.333'
- if (CanUpdByROWID())
- {
- SDWORD cb;
- char rowid[wxDB_ROWID_LEN];
-
- // Get the ROWID value. If not successful retreiving the ROWID,
- // simply fall down through the code and build the WHERE clause
- // based on the key fields.
- if (SQLGetData(hstmt, noCols+1, SQL_C_CHAR, (UCHAR*) rowid, wxDB_ROWID_LEN, &cb) == SQL_SUCCESS)
- {
- wxStrcat(pSqlStmt, "ROWID = '");
- wxStrcat(pSqlStmt, rowid);
- wxStrcat(pSqlStmt, "'");
- break;
- }
- }
- // Unable to delete by ROWID, so build a WHERE
- // clause based on the keyfields.
- BuildWhereClause(whereClause, DB_WHERE_KEYFIELDS);
- wxStrcat(pSqlStmt, whereClause);
- break;
- case DB_DEL_WHERE:
- wxStrcat(pSqlStmt, pWhereClause);
- break;
- case DB_DEL_MATCHING:
- BuildWhereClause(whereClause, DB_WHERE_MATCHING);
- wxStrcat(pSqlStmt, whereClause);
- break;
- }
-
-} // BuildDeleteStmt()
-
-
-/********** wxDbTable::BuildWhereClause() **********/
-void wxDbTable::BuildWhereClause(char *pWhereClause, int typeOfWhere,
- const char *qualTableName, bool useLikeComparison)
-/*
- * Note: BuildWhereClause() currently ignores timestamp columns.
- * They are not included as part of the where clause.
- */
-{
- bool moreThanOneColumn = FALSE;
- char colValue[255];
-
- // Loop through the columns building a where clause as you go
- int i;
- for (i = 0; i < noCols; i++)
- {
- // Determine if this column should be included in the WHERE clause
- if ((typeOfWhere == DB_WHERE_KEYFIELDS && colDefs[i].KeyField) ||
- (typeOfWhere == DB_WHERE_MATCHING && (! IsColNull(i))))
- {
- // Skip over timestamp columns
- if (colDefs[i].SqlCtype == SQL_C_TIMESTAMP)
- continue;
- // If there is more than 1 column, join them with the keyword "AND"
- if (moreThanOneColumn)
- wxStrcat(pWhereClause, " AND ");
- else
- moreThanOneColumn = TRUE;
- // Concatenate where phrase for the column
- if (qualTableName && wxStrlen(qualTableName))
- {
- wxStrcat(pWhereClause, qualTableName);
- wxStrcat(pWhereClause, ".");
- }
- wxStrcat(pWhereClause, colDefs[i].ColName);
- if (useLikeComparison && (colDefs[i].SqlCtype == SQL_C_CHAR))
- wxStrcat(pWhereClause, " LIKE ");
- else
- wxStrcat(pWhereClause, " = ");
- switch(colDefs[i].SqlCtype)
- {
- case SQL_C_CHAR:
- sprintf(colValue, "'%s'", (UCHAR FAR *) colDefs[i].PtrDataObj);
- break;
- case SQL_C_SSHORT:
- sprintf(colValue, "%hi", *((SWORD *) colDefs[i].PtrDataObj));
- break;
- case SQL_C_USHORT:
- sprintf(colValue, "%hu", *((UWORD *) colDefs[i].PtrDataObj));
- break;
- case SQL_C_SLONG:
- sprintf(colValue, "%li", *((SDWORD *) colDefs[i].PtrDataObj));
- break;
- case SQL_C_ULONG:
- sprintf(colValue, "%lu", *((UDWORD *) colDefs[i].PtrDataObj));
- break;
- case SQL_C_FLOAT:
- sprintf(colValue, "%.6f", *((SFLOAT *) colDefs[i].PtrDataObj));
- break;
- case SQL_C_DOUBLE:
- sprintf(colValue, "%.6f", *((SDOUBLE *) colDefs[i].PtrDataObj));
- break;
- }
- wxStrcat(pWhereClause, colValue);
- }
- }
-} // wxDbTable::BuildWhereClause()
-
-
-/********** wxDbTable::IsColNull() **********/
-bool wxDbTable::IsColNull(int colNo)
-{
- switch(colDefs[colNo].SqlCtype)
projects / wxWidgets.git / blobdiff