REGEX_REPLACE_ALL()

All functions > STRING > REGEX_REPLACE_ALL()

Returns the haystack with every non-overlapping regular-expression match replaced by the replacement string.

Signatures

Returns: Updated string; unchanged if there is no match; NULL if the haystack is NULL

REGEX_REPLACE_ALL(string: VARCHAR, pattern: VARCHAR, replacement: VARCHAR) → VARCHAR

Notes

• All non-overlapping matches are replaced; use REGEX_REPLACE_FIRST for a single replacement
• If the pattern does not match, the original string is returned unchanged

Aliases

• REGEXP_REPLACE_ALL

See also

• String functions

Examples

SELECT
    -- Replace all digit groups
    f1 := REGEX_REPLACE_ALL('abc123def456', '[0-9]+', 'NUM'),
    -- All occurrences replaced
    f2 := REGEX_REPLACE_ALL('foo bar foo', 'foo', 'baz'),
    -- Normalize whitespace
    f3 := REGEX_REPLACE_ALL('  extra   spaces  ', '\s+', ' '),
    -- No match returns original
    f4 := REGEX_REPLACE_ALL('no match', '[0-9]+', 'X'),
    -- NULL haystack
    f5 := REGEX_REPLACE_ALL(NULL(VARCHAR), 'a', 'b')
;