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SQL/JSON: Improve some error messages

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This improves some error messages emitted by SQL/JSON query functions
by mentioning column name when available, such as when they are
invoked as part of evaluating JSON_TABLE() columns.  To do so, a new
field column_name is added to both JsonFuncExpr and JsonExpr that is
only populated when creating those nodes for transformed JSON_TABLE()
columns.

While at it, relevant error messages are reworded for clarity.

Reported-by: Jian He <jian.universality@gmail.com>
Suggested-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxG_e0QLCgaELrr2ZNz7AxPeGCNKAORe3fHtFCQLsH4J4Q@mail.gmail.com
This commit is contained in:
Amit Langote
2024-04-18 14:33:47 +09:00
parent 40126ac68f
commit b4fad46b6b
10 changed files with 100 additions and 61 deletions
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1
src/backend/parser/parse_expr.c
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@ -4311,6 +4311,7 @@ transformJsonFuncExpr(ParseState *pstate, JsonFuncExpr *func)
jsexpr = makeNode(JsonExpr);
jsexpr->location = func->location;
jsexpr->op = func->op;
jsexpr->column_name = func->column_name;
/*
* jsonpath machinery can only handle jsonb documents, so coerce the input