Hello
It is clear that '' is a bad integer or timestamp representation
but during the user input NULLs are usually represented with empty strings
sometimes bunch of 'if empty' instructions grows huge
(and in case of casting to timestamp apostrophes make sense)
Why you prohibit casting ''::int to NULL ?
What would you advice ?
thnx
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
