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The documentation previously said that pg_get_sequence_data() returns a row of NULL values if the sequence does not exist or if the current user lacks privileges on it. This was incomplete and could be misleading. A nonexistent relation name is rejected during regclass input conversion, while the function returns NULLs for a nonexistent relation OID and several other cases. This commit clarifies that the function returns NULLs when the specified relation OID does not exist, the relation is not a sequence, the current user lacks SELECT privilege on the sequence, the sequence belongs to another session's temporary schema, or it is an unlogged sequence on a standby server. Author: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/CAA4eK1JOo0aJRhFHNWpj3hMwaTtNOopY34f1Lh_QD=z=+DrzWQ@mail.gmail.com Backpatch-through: 19 |
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