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(parent: ea9e59d) | patch

author	Andrew Dunstan <[email protected]>
	Thu, 7 Jul 2022 21:40:02 +0000 (17:40 -0400)
committer	Andrew Dunstan <[email protected]>
	Thu, 7 Jul 2022 21:45:47 +0000 (17:45 -0400)
commit	2b2bcc22e571c27a9ea8861e29e0c40874dae714
tree	c782b50bb528f2256b82cf7d230689bad6f3dec1	tree
parent	ea9e59d701b3bfdfebcc67647ed203fa22eed9b0	commit \| diff

Only allow returning string types or bytea from json_serialize

These are documented to be the allowed types for the RETURNING clause,
but the restriction was not being enforced, which caused a segfault if
another type was specified. Add some testing for this.

Per report from a.kozhemyakin

Backpatch to release 15.

src/backend/parser/parse_expr.c		diff \| blob \| blame \| history
src/test/regress/expected/sqljson.out		diff \| blob \| blame \| history
src/test/regress/sql/sqljson.sql		diff \| blob \| blame \| history

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