Amit Langote 0f271e8e8d SQL/JSON: Correct jsonpath variable name matching ...

Previously, GetJsonPathVar() allowed a jsonpath expression to
reference any prefix of a PASSING variable's name. For example, the
following query would incorrectly work:

SELECT JSON_QUERY(context_item, jsonpath '$xy' PASSING val AS xyz);

The fix ensures that the length of the variable name mentioned in a
jsonpath expression matches exactly with the name of the PASSING
variable before comparing the strings using strncmp().

Reported-by: Alvaro Herrera (off-list)
Discussion: https://postgr.es/m/CA+HiwqFGkLWMvELBH6E4SQ45qUHthgcRH6gCJL20OsYDRtFx_w@mail.gmail.com

2024-06-19 15:22:06 +09:00

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guc_tables.h

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jsonpath.h

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