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Improve error message with JSON_SERIALIZE()

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The error message introduced in 3c633f3 can share the same format string
with an existing message used for JSON(), reducing the translation
effort.

Author: Kyotaro Horiguchi
Discussion: https://postgr.es/m/20220708.154135.2123613118233840495.horikyota.ntt@gmail.com
Backpatch-through: 15
This commit is contained in:
Michael Paquier 2022-07-11 11:20:15 +09:00
parent 8445f5a21d
commit 0a6be1f0ec
2 changed files with 4 additions and 3 deletions
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5
src/backend/parser/parse_expr.c
View File

@ -4587,8 +4587,9 @@ transformJsonSerializeExpr(ParseState *pstate, JsonSerializeExpr *expr)
if (typcategory != TYPCATEGORY_STRING)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot use RETURNING type %s in JSON_SERIALIZE",
format_type_be(returning->typid)),
errmsg("cannot use RETURNING type %s in %s",
format_type_be(returning->typid),
"JSON_SERIALIZE()"),
errhint("Try returning a string type or bytea")));
}
}

2
src/test/regress/expected/sqljson.out
View File

@ -316,7 +316,7 @@ SELECT pg_typeof(JSON_SERIALIZE(NULL));
-- only string types or bytea allowed
SELECT JSON_SERIALIZE('{ "a" : 1 } ' RETURNING jsonb);
ERROR: cannot use RETURNING type jsonb in JSON_SERIALIZE
ERROR: cannot use RETURNING type jsonb in JSON_SERIALIZE()
HINT: Try returning a string type or bytea
EXPLAIN (VERBOSE, COSTS OFF) SELECT JSON_SERIALIZE('{}');
QUERY PLAN