doc: Clarify that empty COMMENT string removes the comment.
Clarify the documentation of COMMENT ON to state that specifying an empty
string is treated as NULL, meaning that the comment is removed.
This makes the behavior explicit and avoids possible confusion about how
empty strings are handled.
Also adds regress test cases that use empty string to remove a comment.
Backpatch to all supported versions.
Author: Chao Li <lic@highgo.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Reviewed-by: David G. Johnston <david.g.johnston@gmail.com>
Reviewed-by: Shengbin Zhao <zshengbin91@gmail.com>
Reviewed-by: Jim Jones <jim.jones@uni-muenster.de>
Reviewed-by: zhangqiang <zhang_qiang81@163.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/26476097-B1C1-4BA8-AA92-0AD0B8EC7190@gmail.com
Backpatch-through: 14
Branch
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REL_16_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/228addbbf2c13f8cc8f80bb6f0aa5bd7204e65e5
Modified Files
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doc/src/sgml/ref/comment.sgml | 18 +++++++++++-------
src/test/regress/expected/create_index.out | 14 ++++++++++++++
src/test/regress/expected/create_role.out | 27 +++++++++++++++++++++++++++
src/test/regress/sql/create_index.sql | 4 ++++
src/test/regress/sql/create_role.sql | 7 +++++++
5 files changed, 63 insertions(+), 7 deletions(-)
