115 lines
4.0 KiB
SQL
115 lines
4.0 KiB
SQL
--
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-- TEXT
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--
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SELECT text 'this is a text string' = text 'this is a text string' AS true;
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SELECT text 'this is a text string' = text 'this is a text strin' AS false;
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-- text_tbl was already created and filled in test_setup.sql.
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SELECT * FROM TEXT_TBL;
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-- As of 8.3 we have removed most implicit casts to text, so that for example
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-- this no longer works:
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select length(42);
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-- But as a special exception for usability's sake, we still allow implicit
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-- casting to text in concatenations, so long as the other input is text or
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-- an unknown literal. So these work:
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select 'four: '::text || 2+2;
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select 'four: ' || 2+2;
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-- but not this:
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select 3 || 4.0;
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/*
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* various string functions
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*/
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select concat('one');
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select concat(1,2,3,'hello',true, false, to_date('20100309','YYYYMMDD'));
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select concat_ws('#','one');
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select concat_ws('#',1,2,3,'hello',true, false, to_date('20100309','YYYYMMDD'));
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select concat_ws(',',10,20,null,30);
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select concat_ws('',10,20,null,30);
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select concat_ws(NULL,10,20,null,30) is null;
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select reverse('abcde');
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select i, left('ahoj', i), right('ahoj', i) from generate_series(-5, 5) t(i) order by i;
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select quote_literal('');
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select quote_literal('abc''');
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select quote_literal(e'\\');
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-- check variadic labeled argument
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select concat(variadic array[1,2,3]);
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select concat_ws(',', variadic array[1,2,3]);
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select concat_ws(',', variadic NULL::int[]);
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select concat(variadic NULL::int[]) is NULL;
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select concat(variadic '{}'::int[]) = '';
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--should fail
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select concat_ws(',', variadic 10);
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/*
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* format
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*/
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select format(NULL);
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select format('Hello');
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select format('Hello %s', 'World');
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select format('Hello %%');
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select format('Hello %%%%');
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-- should fail
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select format('Hello %s %s', 'World');
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select format('Hello %s');
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select format('Hello %x', 20);
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-- check literal and sql identifiers
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select format('INSERT INTO %I VALUES(%L,%L)', 'mytab', 10, 'Hello');
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select format('%s%s%s','Hello', NULL,'World');
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select format('INSERT INTO %I VALUES(%L,%L)', 'mytab', 10, NULL);
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select format('INSERT INTO %I VALUES(%L,%L)', 'mytab', NULL, 'Hello');
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-- should fail, sql identifier cannot be NULL
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select format('INSERT INTO %I VALUES(%L,%L)', NULL, 10, 'Hello');
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-- check positional placeholders
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select format('%1$s %3$s', 1, 2, 3);
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select format('%1$s %12$s', 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
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-- should fail
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select format('%1$s %4$s', 1, 2, 3);
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select format('%1$s %13$s', 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
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select format('%0$s', 'Hello');
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select format('%*0$s', 'Hello');
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select format('%1$', 1);
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select format('%1$1', 1);
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-- check mix of positional and ordered placeholders
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select format('Hello %s %1$s %s', 'World', 'Hello again');
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select format('Hello %s %s, %2$s %2$s', 'World', 'Hello again');
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-- check variadic labeled arguments
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select format('%s, %s', variadic array['Hello','World']);
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select format('%s, %s', variadic array[1, 2]);
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select format('%s, %s', variadic array[true, false]);
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select format('%s, %s', variadic array[true, false]::text[]);
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-- check variadic with positional placeholders
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select format('%2$s, %1$s', variadic array['first', 'second']);
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select format('%2$s, %1$s', variadic array[1, 2]);
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-- variadic argument can be array type NULL, but should not be referenced
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select format('Hello', variadic NULL::int[]);
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-- variadic argument allows simulating more than FUNC_MAX_ARGS parameters
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select format(string_agg('%s',','), variadic array_agg(i))
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from generate_series(1,200) g(i);
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-- check field widths and left, right alignment
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select format('>>%10s<<', 'Hello');
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select format('>>%10s<<', NULL);
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select format('>>%10s<<', '');
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select format('>>%-10s<<', '');
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select format('>>%-10s<<', 'Hello');
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select format('>>%-10s<<', NULL);
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select format('>>%1$10s<<', 'Hello');
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select format('>>%1$-10I<<', 'Hello');
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select format('>>%2$*1$L<<', 10, 'Hello');
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select format('>>%2$*1$L<<', 10, NULL);
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select format('>>%2$*1$L<<', -10, NULL);
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select format('>>%*s<<', 10, 'Hello');
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select format('>>%*1$s<<', 10, 'Hello');
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select format('>>%-s<<', 'Hello');
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select format('>>%10L<<', NULL);
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select format('>>%2$*1$L<<', NULL, 'Hello');
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select format('>>%2$*1$L<<', 0, 'Hello');
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