json_scalar()

Converts a given SQL scalar value into a JSON scalar value. If the input is NULL, an SQL null is returned. If the input is number or a boolean value, a corresponding JSON number or boolean value is returned. For any other value, a JSON string is returned.

Signature

json_scalar ( expression )

Examples

SELECT json_scalar(123.45);

123.45

Run against PostgreSQL 18.6 on 2026-09-13. This is the output we got, not the documentation’s.

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