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760f3c043a
Previously, the VARIADIC labeling was effectively ignored, but now these functions act as though the array elements had all been given as separate arguments. Pavel Stehule
99 lines
3.4 KiB
SQL
99 lines
3.4 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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CREATE TABLE TEXT_TBL (f1 text);
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INSERT INTO TEXT_TBL VALUES ('doh!');
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INSERT INTO TEXT_TBL VALUES ('hi de ho neighbor');
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SELECT '' AS two, * 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);
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select concat(variadic NULL) 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('%1s', 1);
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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 NULL, but should not be referenced
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select format('Hello', variadic NULL);
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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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