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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-6705) Triggers should not allow MERGE statements that reference temporary tables
Date Thu, 14 Aug 2014 14:52:17 GMT
Knut Anders Hatlen created DERBY-6705:
-----------------------------------------

             Summary: Triggers should not allow MERGE statements that reference temporary
tables
                 Key: DERBY-6705
                 URL: https://issues.apache.org/jira/browse/DERBY-6705
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.11.1.1
            Reporter: Knut Anders Hatlen


The reference manual topic on the DECLARE GLOBAL TEMPORARY TABLE statement says: "Temporary
tables cannot be referenced in a triggeredSQLStatement or in a WHEN clause"

Still, a CREATE TRIGGER statement succeeds if the triggered SQL statement is a MERGE statement
that references a temporary table:

{noformat}
ij> connect 'jdbc:derby:memory:db;create=true';
ij> declare global temporary table temp (x int) not logged;
0 rows inserted/updated/deleted
ij> create table t1(x int);
0 rows inserted/updated/deleted
ij> create trigger tr after insert on t1 insert into session.temp values 1;
ERROR XCL51: The requested function can not reference tables in SESSION schema.
ij> create trigger tr after insert on t1 merge into session.temp using t1 on session.temp.x=t1.x
when matched then delete;
0 rows inserted/updated/deleted
ij> insert into t1 values 1,2,3;
3 rows inserted/updated/deleted
{noformat}

The second CREATE TRIGGER statement above should have failed the same way as the first.



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