On 03/30/2016 01:09 PM, John Stewart wrote:
Good day, I have two tables, table1 & table2 with two trigger functions set on table1, on before & after insert. table1 contains a foreign key reference to table2, called building_id.
What are the actual schema definitions for the tables?
when a row is inserted into table1, building is in text format, I need the after-trigger to lookup this text value in table2, if it exists, retrieve the id & update table1 with it, else if it doesn't exist insert it & update table1 with the new id.
Seems you are doing this backwards, need to see the above schema definitions to be sure.
I could do this in the before-trigger, but how do you rollback the newly created row in table2 (if it's a new value) if insert failed on table1. my problem is passing values between the before & after triggers, I could retrieve all the required columns' values in after-trigger using NEW.* but what about building_id? I could set it temporarily to NULL in before-trigger because clearly the foreign column cannot accept a textual-value, then do the lookup with table2 in after-trigger, but how to sustain the original building textual value? Thank you.
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