Horton

Disallow USING clause when altering type of generated column

Peter Eisentraut <peter@eisentraut.org>

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Commit: 1c57ae795b3c0650cbac13e0f59f326ddc34c5d0
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2024-08-29T07:03:06Z
Releases: 12.21 
Disallow USING clause when altering type of generated column

This does not make sense.  It would write the output of the USING
clause into the converted column, which would violate the generation
expression.  This adds a check to error out if this is specified.

There was a test for this, but that test errored out for a different
reason, so it was not effective.

Reported-by: Jian He <jian.universality@gmail.com>
Reviewed-by: Yugo NAGATA <nagata@sraoss.co.jp>
Discussion: https://www.postgresql.org/message-id/flat/c7083982-69f4-4b14-8315-f9ddb20b9834%40eisentraut.org

Files

PathChange+/−
src/backend/commands/tablecmds.c modified +12 −1
src/test/regress/expected/generated.out modified +2 −1

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