removing zwnj character from string in postgres during select statement

Question

The utf encoded string contains Zwnj(zero width non joiner) at the end and is stored in database. Is it possible to remove that character during select statement. I tried trim() but doesn't work.

Answer 1

CREATE TABLE test (x text);
INSERT INTO test VALUES (E'abc');
INSERT INTO test VALUES (E'foo\u200C');  -- U+200C = ZERO WIDTH NON-JOINER
SELECT x, octet_length(x) FROM test;
  x  │ octet_length 
─────┼──────────────
 abc │            3
 foo │            6
(2 rows)

CREATE TABLE test2 AS SELECT replace(x, E'\u200C', '') AS x FROM test;
SELECT x, octet_length(x) FROM test2;
  x  │ octet_length 
─────┼──────────────
 abc │            3
 foo │            3
(2 rows)

Answer 2

You need to use replace(your_column, 'Zwnj','') instead of trim()