RE: column_query buffer in PGAPI ColumnPrivileges

Dear Kind regards JT,

Thanks for your help and patience.

The error of SQL Command I mentioned is here：

3733     if (escSchemaName)                                                  ↓↓--  table_schema

3734         appendPQExpBuffer(&column_query, " and table_schem %s'%s'", eq_string, escSchemaName);

jiang=# select '' as TABLE_CAT, table_schema as TABLE_SCHEM,

                table_name, column_name, grantor, grantee,

                privilege_type as PRIVILEGE, is_grantable from

                information_schema.column_privileges where true

                and table_schem = 'public'          ---->>>>       Maybe table_schem[a]？   

                and table_name ='test'

                and column_name = 'a';

ERROR:  column "table_schem" does not exist

LINE 5:                 and table_schem = 'public'     

                            ^

HINT:  Perhaps you meant to reference the column "column_privileges.table_schema".

jiang=#

Sent from Mail for Windows

Dear foxi_yiyi12081003,

I’m not an expert on the inner workings of this specific driver, but in my opinion this is probably correct.

The query that is defined inside appendPQExpBufferStr, asks for data from column table_schema to be returned using a different name: TABLE_SCHEM.

When the results of that query are used further down, the correct name to use them will be that new name.

When the query is run against an running instance of a postgres-database it gives results (over 9000), here limited to just 5.

select '' as TABLE_CAT, table_schema as TABLE_SCHEM,

          table_name, column_name, grantor, grantee,

          privilege_type as PRIVILEGE, is_grantable from

          information_schema.column_privileges where true limit 5;

Kind regards JT