Arguments in Catalog Functions

All catalog functions accept arguments with which an application can restrict the scope of the data returned. For example, the first and second calls to SQLTables in the following code return a result set containing information about all tables, while the third call returns information about the Orders table:

SQLTables(hstmt1, NULL, 0, NULL, 0, NULL, 0, NULL, 0);  
SQLTables(hstmt2, NULL, 0, NULL, 0, "%", SQL_NTS, NULL, 0);  
SQLTables(hstmt3, NULL, 0, NULL, 0, "Orders", SQL_NTS, NULL, 0);

Catalog function string arguments fall into four different types: ordinary argument (OA), pattern value argument (PV), identifier argument (ID), and value list argument (VL). Most string arguments can be of one of two different types, depending on the value of the SQL_ATTR_METADATA_ID statement attribute. The following table lists the arguments for each catalog function and describes the type of the argument for an SQL_TRUE or SQL_FALSE value of SQL_ATTR_METADATA_ID.

Function Argument Type when SQL_

ATTR_METADATA_

ID = SQL_FALSE
Type when SQL_

ATTR_METADATA_

ID = SQL_TRUE
SQLColumnPrivileges CatalogName SchemaName TableName ColumnName OA OA OA PV ID ID ID ID
SQLColumns CatalogName SchemaName TableName ColumnName OA PV PV PV ID ID ID ID
SQLForeignKeys PKCatalogName PKSchemaName PKTableName FKCatalogName FKSchemaName FKTableName OA OA OA OA OA OA ID ID ID ID ID ID
SQLPrimaryKeys CatalogName SchemaName TableName OA OA OA ID ID ID
SQLProcedureColumns CatalogName SchemaName ProcName ColumnName OA PV PV PV ID ID ID ID
SQLProcedures CatalogName SchemaName ProcName OA PV PV ID ID ID
SQLSpecialColumns CatalogName SchemaName TableName OA OA OA ID ID ID
SQLStatistics CatalogName SchemaName TableName OA OA OA ID ID ID
SQLTablePrivileges CatalogName SchemaName TableName OA PV PV ID ID ID
SQLTables CatalogName SchemaName TableName TableType PV PV PV VL ID ID ID VL

This section contains the following topics.