quote_nullable()

Returns the given string suitably quoted to be used as a string literal in an SQL statement string; or, if the argument is null, returns NULL. Embedded single-quotes and backslashes are properly doubled. See also Example 41.1.

Signature

quote_nullable ( text ) → text
quote_nullable ( anyelement ) → text

Examples

SELECT quote_nullable(NULL);

NULL

SELECT quote_nullable(42.5);

'42.5'

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

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