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Check Existence of temporary table in a session.

From: "Dinesh Parikh" <dineshp(at)newgen(dot)co(dot)in>
To: <pgsql-general(at)postgresql(dot)org>, <pgsql-sql(at)postgresql(dot)org>
Subject: Check Existence of temporary table in a session.
Date: 2001-10-27 11:37:06
Message-ID: 000001c160f5$a0da2730$f005a8c0@dinesh (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-sql
Hi All,
I have an strange problem . I am building an application with connection pooling. I had write a stored procedure and called from JDBC. In Procedure i am creating a table (temporary). I want to check if this temporary table already exists then do not create otherwise create it. The following query fails.

Select Into DBExistsFlag 1 
Where Exists (Select * from Pg_Tables Where Upper(Trim(TableName)) = Upper(Trim(''FolderTree'')));
 If Not Found Then
      Create Temp Table FolderTree(FolderId Int8,ParentFolderId Int8,
                    FolderTyp Char(1),Leaf Int4,RightFlag Char(1));
 End If;
 If DBExistsFlag = 1 Then
        Delete From FolderTree;
 End If; 


When I saw the table pgadmin_tables there was entry of table name  pg_temp.232667.2 The columns of this table mached with my temporary table.

My question is that if postgres converts table name to this one then how can i find that temporary table already exists so that irritating mesasage should not come.

Any help/suggesion may be benificial for me.

Thanks

Regards
Dinesh Parikh
NSTL New Delhi



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