2017-11-01 19:03 GMT+01:00 Mark Dilger <hornschnor...@gmail.com>: > > > Comments, notes? > > How would variables behave on transaction rollback? > > CREATE TEMP VARIABLE myvar; > SET myvar := 1; > BEGIN; > SET myvar := 2; > COMMIT; > BEGIN; > SET myvar := 3; > ROLLBACK; > SELECT myvar; > > How would variables behave when modified in a procedure > that aborts rather than returning cleanly? > > The result is 3
When you create variable like you did, then there are not any relation between variable content and transactions. Almost every where session - package - schema variables are untransactional. It can be changed, but with negative impact on performance - so I propose relative simply solution - reset to default on rollback, when variables was changed in transaction - but it is not default behave. Variables are variables like you know from PlpgSQL. But the holder is not the plpgsql function. The holder is a schema in this case. The variable (meta) is permanent. The content of variable is session based untransactional. Regards Pavel > mark >
