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SQL/JSON: Validate values in ON ERROR/EMPTY clauses

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Currently, the grammar allows any supported values in the ON ERROR
and ON EMPTY clauses for SQL/JSON functions, regardless of whether
the values are appropriate for the function. This commit ensures
that during parse analysis, the provided value is checked for
validity for the given function and throws a syntax error if it is
not.

While at it, this fixes some omissions in the documentation of the
ON ERROR/EMPTY clauses for JSON_TABLE().

Reported-by: Jian He <jian.universality@gmail.com>
Reviewed-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxFgWGqpESSYzyJ6tSurr3vFYBSNEmCfkGyB_dMdptFnZQ%40mail.gmail.com
This commit is contained in:
Amit Langote
2024-06-28 13:59:57 +09:00
parent e3c1393efc
commit 55e56c84da
7 changed files with 174 additions and 14 deletions
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7
src/test/regress/sql/sqljson_jsontable.sql
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@ -521,3 +521,10 @@ DROP TABLE s;
-- Prevent ON EMPTY specification on EXISTS columns
SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int exists empty object on empty));
-- Test ON ERROR / EMPTY value validity for the function and column types;
-- all fail
SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int) NULL ON ERROR);
SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int true on empty));
SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int omit quotes true on error));
SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int exists empty object on error));