postgresql/src/test/regress/sql/text.sql

--
-- TEXT
--

SELECT text 'this is a text string' = text 'this is a text string' AS true;

SELECT text 'this is a text string' = text 'this is a text strin' AS false;

CREATE TABLE TEXT_TBL (f1 text);

INSERT INTO TEXT_TBL VALUES ('doh!');
INSERT INTO TEXT_TBL VALUES ('hi de ho neighbor');

SELECT '' AS two, * FROM TEXT_TBL;

-- As of 8.3 we have removed most implicit casts to text, so that for example
-- this no longer works:

select length(42);

-- But as a special exception for usability's sake, we still allow implicit
-- casting to text in concatenations, so long as the other input is text or
-- an unknown literal.  So these work:

select 'four: '::text || 2+2;
select 'four: ' || 2+2;

-- but not this:

select 3 || 4.0;

/*
 * string functions
 */
select concat('one');
select concat(1,2,3,'hello',true, false, to_date('20100309','YYYYMMDD'));
select concat_ws('#','one');
select concat_ws('#',1,2,3,'hello',true, false, to_date('20100309','YYYYMMDD'));
select concat_ws(',',10,20,null,30);
select concat_ws('',10,20,null,30);
select concat_ws(NULL,10,20,null,30) is null;
select reverse('abcde');
select i, left('ahoj', i), right('ahoj', i) from generate_series(-5, 5) t(i) order by i;
select quote_literal('');
select quote_literal('abc''');
select quote_literal(e'\\');