Functions / String Functions And Operators

regexp_substr

Returns the substring within string that matches the N'th occurrence of the POSIX regular expression pattern, or NULL if there is no such match; see Section 9.7.3.

Reading PG 18current·documented in 6 of 27 versions, 15 to 20

7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4 9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19 20

Signatures & examples

regexp_substr ( string text, pattern text [, start integer [, N integer [, flags text [, subexpr integer ] ] ] ] ) → text

Returns the substring within string that matches the N'th occurrence of the POSIX regular expression pattern, or NULL if there is no such match; see Section 9.7.3.

regexp_substr('ABCDEF', 'c(.)(..)', 1, 1, 'i') → CDEF

regexp_substr('ABCDEF', 'c(.)(..)', 1, 1, 'i', 2) → EF

Version history 2

18 → 19 changed
14 → 15 added

Definition snapshot: 2026-09-14T13:14:25.684213+00:00@99e6866c · English manual source