Document strange jsonb sort order for empty top level arrays
Slightly faulty logic in the original jsonb code (commit d9134d0a355)
results in an empty top level array sorting less than a json null. We
can't change the sort order now since it would affect btree indexes over
jsonb, so document the anomaly.
Backpatch to all live branches (13 .. 17)
In master, also add a code comment noting the anomaly.
Reported-by: Yan Chengpen
Reviewed-by: Jian He
Discussion: https://postgr.es/m/OSBPR01MB45199DD8DA2D1CECD50518188E272@OSBPR01MB4519.jpnprd01.prod.outlook.com
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/30f017626308a06cf0c0c82a706a1ba1b07df34a
Modified Files
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doc/src/sgml/json.sgml | 3 ++-
src/backend/utils/adt/jsonb_util.c | 7 +++++++
2 files changed, 9 insertions(+), 1 deletion(-)
