chaisql/sqltests/SELECT/STRINGS/trim.sql

-- setup:
CREATE TABLE test(
    pk INT PRIMARY KEY,
    a TEXT
);

INSERT INTO test (pk, a) VALUES (1, ' hello '), (2, '!hello!'),  (3, '     !hello!  ');

-- test: TRIM TEXT default
SELECT TRIM(a) FROM test;
/* result:
{
    "TRIM(a)": 'hello'
}
{
    "TRIM(a)": '!hello!'
}
{
    "TRIM(a)": '!hello!'
}
*/

-- test: TRIM TEXT with param
SELECT TRIM(a, '!') FROM test;
/* result:
{
    "TRIM(a, '!')": ' hello '
}
{
    "TRIM(a, '!')": 'hello'
}
{
    "TRIM(a, '!')": '     !hello!  '
}
*/

-- test: TRIM TEXT with multiple char params
SELECT TRIM(a, ' !') FROM test;
/* result:
{
    "TRIM(a, ' !')": 'hello'
}
{
    "TRIM(a, ' !')": 'hello'
}
{
    "TRIM(a, ' !')": 'hello'
}
*/


-- test: TRIM TEXT with multiple char params
SELECT TRIM(a, 'hel !') FROM test;
/* result:
{
    "TRIM(a, 'hel !')": 'o'
}
{
    "TRIM(a, 'hel !')": 'o'
}
{
    "TRIM(a, 'hel !')": 'o'
}
*/


-- test: TRIM BOOL
SELECT TRIM(true);
/* result:
{
    "TRIM(true)": NULL
}
*/

-- test: TRIM INT
SELECT TRIM(42);
/* result:
{
    "TRIM(42)": NULL
}
*/

-- test: TRIM DOUBLE
SELECT TRIM(42.42);
/* result:
{
    "TRIM(42.42)": NULL
}
*/

-- test: TRIM STRING wrong param
SELECT TRIM(' hello ', 42);
/* result:
{
    "TRIM(' hello ', 42)": NULL
}
*/