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Diffstat (limited to 'src/test/regress/sql/strings.sql')
| -rw-r--r-- | src/test/regress/sql/strings.sql | 761 |
1 files changed, 761 insertions, 0 deletions
diff --git a/src/test/regress/sql/strings.sql b/src/test/regress/sql/strings.sql new file mode 100644 index 0000000..2c50253 --- /dev/null +++ b/src/test/regress/sql/strings.sql @@ -0,0 +1,761 @@ +-- +-- STRINGS +-- Test various data entry syntaxes. +-- + +-- SQL string continuation syntax +-- E021-03 character string literals +SELECT 'first line' +' - next line' + ' - third line' + AS "Three lines to one"; + +-- illegal string continuation syntax +SELECT 'first line' +' - next line' /* this comment is not allowed here */ +' - third line' + AS "Illegal comment within continuation"; + +-- Unicode escapes +SET standard_conforming_strings TO on; + +SELECT U&'d\0061t\+000061' AS U&"d\0061t\+000061"; +SELECT U&'d!0061t\+000061' UESCAPE '!' AS U&"d*0061t\+000061" UESCAPE '*'; +SELECT U&'a\\b' AS "a\b"; + +SELECT U&' \' UESCAPE '!' AS "tricky"; +SELECT 'tricky' AS U&"\" UESCAPE '!'; + +SELECT U&'wrong: \061'; +SELECT U&'wrong: \+0061'; +SELECT U&'wrong: +0061' UESCAPE +; +SELECT U&'wrong: +0061' UESCAPE '+'; + +SELECT U&'wrong: \db99'; +SELECT U&'wrong: \db99xy'; +SELECT U&'wrong: \db99\\'; +SELECT U&'wrong: \db99\0061'; +SELECT U&'wrong: \+00db99\+000061'; +SELECT U&'wrong: \+2FFFFF'; + +-- while we're here, check the same cases in E-style literals +SELECT E'd\u0061t\U00000061' AS "data"; +SELECT E'a\\b' AS "a\b"; +SELECT E'wrong: \u061'; +SELECT E'wrong: \U0061'; +SELECT E'wrong: \udb99'; +SELECT E'wrong: \udb99xy'; +SELECT E'wrong: \udb99\\'; +SELECT E'wrong: \udb99\u0061'; +SELECT E'wrong: \U0000db99\U00000061'; +SELECT E'wrong: \U002FFFFF'; + +SET standard_conforming_strings TO off; + +SELECT U&'d\0061t\+000061' AS U&"d\0061t\+000061"; +SELECT U&'d!0061t\+000061' UESCAPE '!' AS U&"d*0061t\+000061" UESCAPE '*'; + +SELECT U&' \' UESCAPE '!' AS "tricky"; +SELECT 'tricky' AS U&"\" UESCAPE '!'; + +SELECT U&'wrong: \061'; +SELECT U&'wrong: \+0061'; +SELECT U&'wrong: +0061' UESCAPE '+'; + +RESET standard_conforming_strings; + +-- bytea +SET bytea_output TO hex; +SELECT E'\\xDeAdBeEf'::bytea; +SELECT E'\\x De Ad Be Ef '::bytea; +SELECT E'\\xDeAdBeE'::bytea; +SELECT E'\\xDeAdBeEx'::bytea; +SELECT E'\\xDe00BeEf'::bytea; +SELECT E'DeAdBeEf'::bytea; +SELECT E'De\\000dBeEf'::bytea; +SELECT E'De\123dBeEf'::bytea; +SELECT E'De\\123dBeEf'::bytea; +SELECT E'De\\678dBeEf'::bytea; + +SET bytea_output TO escape; +SELECT E'\\xDeAdBeEf'::bytea; +SELECT E'\\x De Ad Be Ef '::bytea; +SELECT E'\\xDe00BeEf'::bytea; +SELECT E'DeAdBeEf'::bytea; +SELECT E'De\\000dBeEf'::bytea; +SELECT E'De\\123dBeEf'::bytea; + +-- +-- test conversions between various string types +-- E021-10 implicit casting among the character data types +-- + +SELECT CAST(f1 AS text) AS "text(char)" FROM CHAR_TBL; + +SELECT CAST(f1 AS text) AS "text(varchar)" FROM VARCHAR_TBL; + +SELECT CAST(name 'namefield' AS text) AS "text(name)"; + +-- since this is an explicit cast, it should truncate w/o error: +SELECT CAST(f1 AS char(10)) AS "char(text)" FROM TEXT_TBL; +-- note: implicit-cast case is tested in char.sql + +SELECT CAST(f1 AS char(20)) AS "char(text)" FROM TEXT_TBL; + +SELECT CAST(f1 AS char(10)) AS "char(varchar)" FROM VARCHAR_TBL; + +SELECT CAST(name 'namefield' AS char(10)) AS "char(name)"; + +SELECT CAST(f1 AS varchar) AS "varchar(text)" FROM TEXT_TBL; + +SELECT CAST(f1 AS varchar) AS "varchar(char)" FROM CHAR_TBL; + +SELECT CAST(name 'namefield' AS varchar) AS "varchar(name)"; + +-- +-- test SQL string functions +-- E### and T### are feature reference numbers from SQL99 +-- + +-- E021-09 trim function +SELECT TRIM(BOTH FROM ' bunch o blanks ') = 'bunch o blanks' AS "bunch o blanks"; + +SELECT TRIM(LEADING FROM ' bunch o blanks ') = 'bunch o blanks ' AS "bunch o blanks "; + +SELECT TRIM(TRAILING FROM ' bunch o blanks ') = ' bunch o blanks' AS " bunch o blanks"; + +SELECT TRIM(BOTH 'x' FROM 'xxxxxsome Xsxxxxx') = 'some Xs' AS "some Xs"; + +-- E021-06 substring expression +SELECT SUBSTRING('1234567890' FROM 3) = '34567890' AS "34567890"; + +SELECT SUBSTRING('1234567890' FROM 4 FOR 3) = '456' AS "456"; + +-- test overflow cases +SELECT SUBSTRING('string' FROM 2 FOR 2147483646) AS "tring"; +SELECT SUBSTRING('string' FROM -10 FOR 2147483646) AS "string"; +SELECT SUBSTRING('string' FROM -10 FOR -2147483646) AS "error"; + +-- T581 regular expression substring (with SQL's bizarre regexp syntax) +SELECT SUBSTRING('abcdefg' SIMILAR 'a#"(b_d)#"%' ESCAPE '#') AS "bcd"; +-- obsolete SQL99 syntax +SELECT SUBSTRING('abcdefg' FROM 'a#"(b_d)#"%' FOR '#') AS "bcd"; + +-- No match should return NULL +SELECT SUBSTRING('abcdefg' SIMILAR '#"(b_d)#"%' ESCAPE '#') IS NULL AS "True"; + +-- Null inputs should return NULL +SELECT SUBSTRING('abcdefg' SIMILAR '%' ESCAPE NULL) IS NULL AS "True"; +SELECT SUBSTRING(NULL SIMILAR '%' ESCAPE '#') IS NULL AS "True"; +SELECT SUBSTRING('abcdefg' SIMILAR NULL ESCAPE '#') IS NULL AS "True"; + +-- The first and last parts should act non-greedy +SELECT SUBSTRING('abcdefg' SIMILAR 'a#"%#"g' ESCAPE '#') AS "bcdef"; +SELECT SUBSTRING('abcdefg' SIMILAR 'a*#"%#"g*' ESCAPE '#') AS "abcdefg"; + +-- Vertical bar in any part affects only that part +SELECT SUBSTRING('abcdefg' SIMILAR 'a|b#"%#"g' ESCAPE '#') AS "bcdef"; +SELECT SUBSTRING('abcdefg' SIMILAR 'a#"%#"x|g' ESCAPE '#') AS "bcdef"; +SELECT SUBSTRING('abcdefg' SIMILAR 'a#"%|ab#"g' ESCAPE '#') AS "bcdef"; + +-- Can't have more than two part separators +SELECT SUBSTRING('abcdefg' SIMILAR 'a*#"%#"g*#"x' ESCAPE '#') AS "error"; + +-- Postgres extension: with 0 or 1 separator, assume parts 1 and 3 are empty +SELECT SUBSTRING('abcdefg' SIMILAR 'a#"%g' ESCAPE '#') AS "bcdefg"; +SELECT SUBSTRING('abcdefg' SIMILAR 'a%g' ESCAPE '#') AS "abcdefg"; + +-- substring() with just two arguments is not allowed by SQL spec; +-- we accept it, but we interpret the pattern as a POSIX regexp not SQL +SELECT SUBSTRING('abcdefg' FROM 'c.e') AS "cde"; + +-- With a parenthesized subexpression, return only what matches the subexpr +SELECT SUBSTRING('abcdefg' FROM 'b(.*)f') AS "cde"; + +-- Check behavior of SIMILAR TO, which uses largely the same regexp variant +SELECT 'abcdefg' SIMILAR TO '_bcd%' AS true; +SELECT 'abcdefg' SIMILAR TO 'bcd%' AS false; +SELECT 'abcdefg' SIMILAR TO '_bcd#%' ESCAPE '#' AS false; +SELECT 'abcd%' SIMILAR TO '_bcd#%' ESCAPE '#' AS true; +-- Postgres uses '\' as the default escape character, which is not per spec +SELECT 'abcdefg' SIMILAR TO '_bcd\%' AS false; +-- and an empty string to mean "no escape", which is also not per spec +SELECT 'abcd\efg' SIMILAR TO '_bcd\%' ESCAPE '' AS true; +-- these behaviors are per spec, though: +SELECT 'abcdefg' SIMILAR TO '_bcd%' ESCAPE NULL AS null; +SELECT 'abcdefg' SIMILAR TO '_bcd#%' ESCAPE '##' AS error; + +-- Test back reference in regexp_replace +SELECT regexp_replace('1112223333', E'(\\d{3})(\\d{3})(\\d{4})', E'(\\1) \\2-\\3'); +SELECT regexp_replace('AAA BBB CCC ', E'\\s+', ' ', 'g'); +SELECT regexp_replace('AAA', '^|$', 'Z', 'g'); +SELECT regexp_replace('AAA aaa', 'A+', 'Z', 'gi'); +-- invalid regexp option +SELECT regexp_replace('AAA aaa', 'A+', 'Z', 'z'); + +-- set so we can tell NULL from empty string +\pset null '\\N' + +-- return all matches from regexp +SELECT regexp_matches('foobarbequebaz', $re$(bar)(beque)$re$); + +-- test case insensitive +SELECT regexp_matches('foObARbEqUEbAz', $re$(bar)(beque)$re$, 'i'); + +-- global option - more than one match +SELECT regexp_matches('foobarbequebazilbarfbonk', $re$(b[^b]+)(b[^b]+)$re$, 'g'); + +-- empty capture group (matched empty string) +SELECT regexp_matches('foobarbequebaz', $re$(bar)(.*)(beque)$re$); +-- no match +SELECT regexp_matches('foobarbequebaz', $re$(bar)(.+)(beque)$re$); +-- optional capture group did not match, null entry in array +SELECT regexp_matches('foobarbequebaz', $re$(bar)(.+)?(beque)$re$); + +-- no capture groups +SELECT regexp_matches('foobarbequebaz', $re$barbeque$re$); + +-- start/end-of-line matches are of zero length +SELECT regexp_matches('foo' || chr(10) || 'bar' || chr(10) || 'bequq' || chr(10) || 'baz', '^', 'mg'); +SELECT regexp_matches('foo' || chr(10) || 'bar' || chr(10) || 'bequq' || chr(10) || 'baz', '$', 'mg'); +SELECT regexp_matches('1' || chr(10) || '2' || chr(10) || '3' || chr(10) || '4' || chr(10), '^.?', 'mg'); +SELECT regexp_matches(chr(10) || '1' || chr(10) || '2' || chr(10) || '3' || chr(10) || '4' || chr(10), '.?$', 'mg'); +SELECT regexp_matches(chr(10) || '1' || chr(10) || '2' || chr(10) || '3' || chr(10) || '4', '.?$', 'mg'); + +-- give me errors +SELECT regexp_matches('foobarbequebaz', $re$(bar)(beque)$re$, 'gz'); +SELECT regexp_matches('foobarbequebaz', $re$(barbeque$re$); +SELECT regexp_matches('foobarbequebaz', $re$(bar)(beque){2,1}$re$); + +-- split string on regexp +SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumps over the lazy dog', $re$\s+$re$) AS foo; +SELECT regexp_split_to_array('the quick brown fox jumps over the lazy dog', $re$\s+$re$); + +SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumps over the lazy dog', $re$\s*$re$) AS foo; +SELECT regexp_split_to_array('the quick brown fox jumps over the lazy dog', $re$\s*$re$); +SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumps over the lazy dog', '') AS foo; +SELECT regexp_split_to_array('the quick brown fox jumps over the lazy dog', ''); +-- case insensitive +SELECT foo, length(foo) FROM regexp_split_to_table('thE QUick bROWn FOx jUMPs ovEr The lazy dOG', 'e', 'i') AS foo; +SELECT regexp_split_to_array('thE QUick bROWn FOx jUMPs ovEr The lazy dOG', 'e', 'i'); +-- no match of pattern +SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumps over the lazy dog', 'nomatch') AS foo; +SELECT regexp_split_to_array('the quick brown fox jumps over the lazy dog', 'nomatch'); +-- some corner cases +SELECT regexp_split_to_array('123456','1'); +SELECT regexp_split_to_array('123456','6'); +SELECT regexp_split_to_array('123456','.'); +SELECT regexp_split_to_array('123456',''); +SELECT regexp_split_to_array('123456','(?:)'); +SELECT regexp_split_to_array('1',''); +-- errors +SELECT foo, length(foo) FROM regexp_split_to_table('thE QUick bROWn FOx jUMPs ovEr The lazy dOG', 'e', 'zippy') AS foo; +SELECT regexp_split_to_array('thE QUick bROWn FOx jUMPs ovEr The lazy dOG', 'e', 'iz'); +-- global option meaningless for regexp_split +SELECT foo, length(foo) FROM regexp_split_to_table('thE QUick bROWn FOx jUMPs ovEr The lazy dOG', 'e', 'g') AS foo; +SELECT regexp_split_to_array('thE QUick bROWn FOx jUMPs ovEr The lazy dOG', 'e', 'g'); + +-- change NULL-display back +\pset null '' + +-- E021-11 position expression +SELECT POSITION('4' IN '1234567890') = '4' AS "4"; + +SELECT POSITION('5' IN '1234567890') = '5' AS "5"; + +-- T312 character overlay function +SELECT OVERLAY('abcdef' PLACING '45' FROM 4) AS "abc45f"; + +SELECT OVERLAY('yabadoo' PLACING 'daba' FROM 5) AS "yabadaba"; + +SELECT OVERLAY('yabadoo' PLACING 'daba' FROM 5 FOR 0) AS "yabadabadoo"; + +SELECT OVERLAY('babosa' PLACING 'ubb' FROM 2 FOR 4) AS "bubba"; + +-- +-- test LIKE +-- Be sure to form every test as a LIKE/NOT LIKE pair. +-- + +-- simplest examples +-- E061-04 like predicate +SELECT 'hawkeye' LIKE 'h%' AS "true"; +SELECT 'hawkeye' NOT LIKE 'h%' AS "false"; + +SELECT 'hawkeye' LIKE 'H%' AS "false"; +SELECT 'hawkeye' NOT LIKE 'H%' AS "true"; + +SELECT 'hawkeye' LIKE 'indio%' AS "false"; +SELECT 'hawkeye' NOT LIKE 'indio%' AS "true"; + +SELECT 'hawkeye' LIKE 'h%eye' AS "true"; +SELECT 'hawkeye' NOT LIKE 'h%eye' AS "false"; + +SELECT 'indio' LIKE '_ndio' AS "true"; +SELECT 'indio' NOT LIKE '_ndio' AS "false"; + +SELECT 'indio' LIKE 'in__o' AS "true"; +SELECT 'indio' NOT LIKE 'in__o' AS "false"; + +SELECT 'indio' LIKE 'in_o' AS "false"; +SELECT 'indio' NOT LIKE 'in_o' AS "true"; + +SELECT 'abc'::name LIKE '_b_' AS "true"; +SELECT 'abc'::name NOT LIKE '_b_' AS "false"; + +SELECT 'abc'::bytea LIKE '_b_'::bytea AS "true"; +SELECT 'abc'::bytea NOT LIKE '_b_'::bytea AS "false"; + +-- unused escape character +SELECT 'hawkeye' LIKE 'h%' ESCAPE '#' AS "true"; +SELECT 'hawkeye' NOT LIKE 'h%' ESCAPE '#' AS "false"; + +SELECT 'indio' LIKE 'ind_o' ESCAPE '$' AS "true"; +SELECT 'indio' NOT LIKE 'ind_o' ESCAPE '$' AS "false"; + +-- escape character +-- E061-05 like predicate with escape clause +SELECT 'h%' LIKE 'h#%' ESCAPE '#' AS "true"; +SELECT 'h%' NOT LIKE 'h#%' ESCAPE '#' AS "false"; + +SELECT 'h%wkeye' LIKE 'h#%' ESCAPE '#' AS "false"; +SELECT 'h%wkeye' NOT LIKE 'h#%' ESCAPE '#' AS "true"; + +SELECT 'h%wkeye' LIKE 'h#%%' ESCAPE '#' AS "true"; +SELECT 'h%wkeye' NOT LIKE 'h#%%' ESCAPE '#' AS "false"; + +SELECT 'h%awkeye' LIKE 'h#%a%k%e' ESCAPE '#' AS "true"; +SELECT 'h%awkeye' NOT LIKE 'h#%a%k%e' ESCAPE '#' AS "false"; + +SELECT 'indio' LIKE '_ndio' ESCAPE '$' AS "true"; +SELECT 'indio' NOT LIKE '_ndio' ESCAPE '$' AS "false"; + +SELECT 'i_dio' LIKE 'i$_d_o' ESCAPE '$' AS "true"; +SELECT 'i_dio' NOT LIKE 'i$_d_o' ESCAPE '$' AS "false"; + +SELECT 'i_dio' LIKE 'i$_nd_o' ESCAPE '$' AS "false"; +SELECT 'i_dio' NOT LIKE 'i$_nd_o' ESCAPE '$' AS "true"; + +SELECT 'i_dio' LIKE 'i$_d%o' ESCAPE '$' AS "true"; +SELECT 'i_dio' NOT LIKE 'i$_d%o' ESCAPE '$' AS "false"; + +SELECT 'a_c'::bytea LIKE 'a$__'::bytea ESCAPE '$'::bytea AS "true"; +SELECT 'a_c'::bytea NOT LIKE 'a$__'::bytea ESCAPE '$'::bytea AS "false"; + +-- escape character same as pattern character +SELECT 'maca' LIKE 'm%aca' ESCAPE '%' AS "true"; +SELECT 'maca' NOT LIKE 'm%aca' ESCAPE '%' AS "false"; + +SELECT 'ma%a' LIKE 'm%a%%a' ESCAPE '%' AS "true"; +SELECT 'ma%a' NOT LIKE 'm%a%%a' ESCAPE '%' AS "false"; + +SELECT 'bear' LIKE 'b_ear' ESCAPE '_' AS "true"; +SELECT 'bear' NOT LIKE 'b_ear' ESCAPE '_' AS "false"; + +SELECT 'be_r' LIKE 'b_e__r' ESCAPE '_' AS "true"; +SELECT 'be_r' NOT LIKE 'b_e__r' ESCAPE '_' AS "false"; + +SELECT 'be_r' LIKE '__e__r' ESCAPE '_' AS "false"; +SELECT 'be_r' NOT LIKE '__e__r' ESCAPE '_' AS "true"; + + +-- +-- test ILIKE (case-insensitive LIKE) +-- Be sure to form every test as an ILIKE/NOT ILIKE pair. +-- + +SELECT 'hawkeye' ILIKE 'h%' AS "true"; +SELECT 'hawkeye' NOT ILIKE 'h%' AS "false"; + +SELECT 'hawkeye' ILIKE 'H%' AS "true"; +SELECT 'hawkeye' NOT ILIKE 'H%' AS "false"; + +SELECT 'hawkeye' ILIKE 'H%Eye' AS "true"; +SELECT 'hawkeye' NOT ILIKE 'H%Eye' AS "false"; + +SELECT 'Hawkeye' ILIKE 'h%' AS "true"; +SELECT 'Hawkeye' NOT ILIKE 'h%' AS "false"; + +SELECT 'ABC'::name ILIKE '_b_' AS "true"; +SELECT 'ABC'::name NOT ILIKE '_b_' AS "false"; + +-- +-- test %/_ combination cases, cf bugs #4821 and #5478 +-- + +SELECT 'foo' LIKE '_%' as t, 'f' LIKE '_%' as t, '' LIKE '_%' as f; +SELECT 'foo' LIKE '%_' as t, 'f' LIKE '%_' as t, '' LIKE '%_' as f; + +SELECT 'foo' LIKE '__%' as t, 'foo' LIKE '___%' as t, 'foo' LIKE '____%' as f; +SELECT 'foo' LIKE '%__' as t, 'foo' LIKE '%___' as t, 'foo' LIKE '%____' as f; + +SELECT 'jack' LIKE '%____%' AS t; + + +-- +-- basic tests of LIKE with indexes +-- + +CREATE TABLE texttest (a text PRIMARY KEY, b int); +SELECT * FROM texttest WHERE a LIKE '%1%'; + +CREATE TABLE byteatest (a bytea PRIMARY KEY, b int); +SELECT * FROM byteatest WHERE a LIKE '%1%'; + +DROP TABLE texttest, byteatest; + + +-- +-- test implicit type conversion +-- + +-- E021-07 character concatenation +SELECT 'unknown' || ' and unknown' AS "Concat unknown types"; + +SELECT text 'text' || ' and unknown' AS "Concat text to unknown type"; + +SELECT char(20) 'characters' || ' and text' AS "Concat char to unknown type"; + +SELECT text 'text' || char(20) ' and characters' AS "Concat text to char"; + +SELECT text 'text' || varchar ' and varchar' AS "Concat text to varchar"; + +-- +-- test substr with toasted text values +-- +CREATE TABLE toasttest(f1 text); + +insert into toasttest values(repeat('1234567890',10000)); +insert into toasttest values(repeat('1234567890',10000)); + +-- +-- Ensure that some values are uncompressed, to test the faster substring +-- operation used in that case +-- +alter table toasttest alter column f1 set storage external; +insert into toasttest values(repeat('1234567890',10000)); +insert into toasttest values(repeat('1234567890',10000)); + +-- If the starting position is zero or less, then return from the start of the string +-- adjusting the length to be consistent with the "negative start" per SQL. +SELECT substr(f1, -1, 5) from toasttest; + +-- If the length is less than zero, an ERROR is thrown. +SELECT substr(f1, 5, -1) from toasttest; + +-- If no third argument (length) is provided, the length to the end of the +-- string is assumed. +SELECT substr(f1, 99995) from toasttest; + +-- If start plus length is > string length, the result is truncated to +-- string length +SELECT substr(f1, 99995, 10) from toasttest; + +TRUNCATE TABLE toasttest; +INSERT INTO toasttest values (repeat('1234567890',300)); +INSERT INTO toasttest values (repeat('1234567890',300)); +INSERT INTO toasttest values (repeat('1234567890',300)); +INSERT INTO toasttest values (repeat('1234567890',300)); +-- expect >0 blocks +SELECT pg_relation_size(reltoastrelid) = 0 AS is_empty + FROM pg_class where relname = 'toasttest'; + +TRUNCATE TABLE toasttest; +ALTER TABLE toasttest set (toast_tuple_target = 4080); +INSERT INTO toasttest values (repeat('1234567890',300)); +INSERT INTO toasttest values (repeat('1234567890',300)); +INSERT INTO toasttest values (repeat('1234567890',300)); +INSERT INTO toasttest values (repeat('1234567890',300)); +-- expect 0 blocks +SELECT pg_relation_size(reltoastrelid) = 0 AS is_empty + FROM pg_class where relname = 'toasttest'; + +DROP TABLE toasttest; + +-- +-- test substr with toasted bytea values +-- +CREATE TABLE toasttest(f1 bytea); + +insert into toasttest values(decode(repeat('1234567890',10000),'escape')); +insert into toasttest values(decode(repeat('1234567890',10000),'escape')); + +-- +-- Ensure that some values are uncompressed, to test the faster substring +-- operation used in that case +-- +alter table toasttest alter column f1 set storage external; +insert into toasttest values(decode(repeat('1234567890',10000),'escape')); +insert into toasttest values(decode(repeat('1234567890',10000),'escape')); + +-- If the starting position is zero or less, then return from the start of the string +-- adjusting the length to be consistent with the "negative start" per SQL. +SELECT substr(f1, -1, 5) from toasttest; + +-- If the length is less than zero, an ERROR is thrown. +SELECT substr(f1, 5, -1) from toasttest; + +-- If no third argument (length) is provided, the length to the end of the +-- string is assumed. +SELECT substr(f1, 99995) from toasttest; + +-- If start plus length is > string length, the result is truncated to +-- string length +SELECT substr(f1, 99995, 10) from toasttest; + +DROP TABLE toasttest; + +-- test internally compressing datums + +-- this tests compressing a datum to a very small size which exercises a +-- corner case in packed-varlena handling: even though small, the compressed +-- datum must be given a 4-byte header because there are no bits to indicate +-- compression in a 1-byte header + +CREATE TABLE toasttest (c char(4096)); +INSERT INTO toasttest VALUES('x'); +SELECT length(c), c::text FROM toasttest; +SELECT c FROM toasttest; +DROP TABLE toasttest; + +-- +-- test length +-- + +SELECT length('abcdef') AS "length_6"; + +-- +-- test strpos +-- + +SELECT strpos('abcdef', 'cd') AS "pos_3"; + +SELECT strpos('abcdef', 'xy') AS "pos_0"; + +SELECT strpos('abcdef', '') AS "pos_1"; + +SELECT strpos('', 'xy') AS "pos_0"; + +SELECT strpos('', '') AS "pos_1"; + +-- +-- test replace +-- +SELECT replace('abcdef', 'de', '45') AS "abc45f"; + +SELECT replace('yabadabadoo', 'ba', '123') AS "ya123da123doo"; + +SELECT replace('yabadoo', 'bad', '') AS "yaoo"; + +-- +-- test split_part +-- +select split_part('','@',1) AS "empty string"; + +select split_part('','@',-1) AS "empty string"; + +select split_part('joeuser@mydatabase','',1) AS "joeuser@mydatabase"; + +select split_part('joeuser@mydatabase','',2) AS "empty string"; + +select split_part('joeuser@mydatabase','',-1) AS "joeuser@mydatabase"; + +select split_part('joeuser@mydatabase','',-2) AS "empty string"; + +select split_part('joeuser@mydatabase','@',0) AS "an error"; + +select split_part('joeuser@mydatabase','@@',1) AS "joeuser@mydatabase"; + +select split_part('joeuser@mydatabase','@@',2) AS "empty string"; + +select split_part('joeuser@mydatabase','@',1) AS "joeuser"; + +select split_part('joeuser@mydatabase','@',2) AS "mydatabase"; + +select split_part('joeuser@mydatabase','@',3) AS "empty string"; + +select split_part('@joeuser@mydatabase@','@',2) AS "joeuser"; + +select split_part('joeuser@mydatabase','@',-1) AS "mydatabase"; + +select split_part('joeuser@mydatabase','@',-2) AS "joeuser"; + +select split_part('joeuser@mydatabase','@',-3) AS "empty string"; + +select split_part('@joeuser@mydatabase@','@',-2) AS "mydatabase"; + +-- +-- test to_hex +-- +select to_hex(256*256*256 - 1) AS "ffffff"; + +select to_hex(256::bigint*256::bigint*256::bigint*256::bigint - 1) AS "ffffffff"; + +-- +-- MD5 test suite - from IETF RFC 1321 +-- (see: ftp://ftp.rfc-editor.org/in-notes/rfc1321.txt) +-- +select md5('') = 'd41d8cd98f00b204e9800998ecf8427e' AS "TRUE"; + +select md5('a') = '0cc175b9c0f1b6a831c399e269772661' AS "TRUE"; + +select md5('abc') = '900150983cd24fb0d6963f7d28e17f72' AS "TRUE"; + +select md5('message digest') = 'f96b697d7cb7938d525a2f31aaf161d0' AS "TRUE"; + +select md5('abcdefghijklmnopqrstuvwxyz') = 'c3fcd3d76192e4007dfb496cca67e13b' AS "TRUE"; + +select md5('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789') = 'd174ab98d277d9f5a5611c2c9f419d9f' AS "TRUE"; + +select md5('12345678901234567890123456789012345678901234567890123456789012345678901234567890') = '57edf4a22be3c955ac49da2e2107b67a' AS "TRUE"; + +select md5(''::bytea) = 'd41d8cd98f00b204e9800998ecf8427e' AS "TRUE"; + +select md5('a'::bytea) = '0cc175b9c0f1b6a831c399e269772661' AS "TRUE"; + +select md5('abc'::bytea) = '900150983cd24fb0d6963f7d28e17f72' AS "TRUE"; + +select md5('message digest'::bytea) = 'f96b697d7cb7938d525a2f31aaf161d0' AS "TRUE"; + +select md5('abcdefghijklmnopqrstuvwxyz'::bytea) = 'c3fcd3d76192e4007dfb496cca67e13b' AS "TRUE"; + +select md5('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'::bytea) = 'd174ab98d277d9f5a5611c2c9f419d9f' AS "TRUE"; + +select md5('12345678901234567890123456789012345678901234567890123456789012345678901234567890'::bytea) = '57edf4a22be3c955ac49da2e2107b67a' AS "TRUE"; + +-- +-- SHA-2 +-- +SET bytea_output TO hex; + +SELECT sha224(''); +SELECT sha224('The quick brown fox jumps over the lazy dog.'); + +SELECT sha256(''); +SELECT sha256('The quick brown fox jumps over the lazy dog.'); + +SELECT sha384(''); +SELECT sha384('The quick brown fox jumps over the lazy dog.'); + +SELECT sha512(''); +SELECT sha512('The quick brown fox jumps over the lazy dog.'); + +-- +-- encode/decode +-- +SELECT encode('\x1234567890abcdef00', 'hex'); +SELECT decode('1234567890abcdef00', 'hex'); +SELECT encode(('\x' || repeat('1234567890abcdef0001', 7))::bytea, 'base64'); +SELECT decode(encode(('\x' || repeat('1234567890abcdef0001', 7))::bytea, + 'base64'), 'base64'); +SELECT encode('\x1234567890abcdef00', 'escape'); +SELECT decode(encode('\x1234567890abcdef00', 'escape'), 'escape'); + +-- +-- get_bit/set_bit etc +-- +SELECT get_bit('\x1234567890abcdef00'::bytea, 43); +SELECT get_bit('\x1234567890abcdef00'::bytea, 99); -- error +SELECT set_bit('\x1234567890abcdef00'::bytea, 43, 0); +SELECT set_bit('\x1234567890abcdef00'::bytea, 99, 0); -- error +SELECT get_byte('\x1234567890abcdef00'::bytea, 3); +SELECT get_byte('\x1234567890abcdef00'::bytea, 99); -- error +SELECT set_byte('\x1234567890abcdef00'::bytea, 7, 11); +SELECT set_byte('\x1234567890abcdef00'::bytea, 99, 11); -- error + +-- +-- test behavior of escape_string_warning and standard_conforming_strings options +-- +set escape_string_warning = off; +set standard_conforming_strings = off; + +show escape_string_warning; +show standard_conforming_strings; + +set escape_string_warning = on; +set standard_conforming_strings = on; + +show escape_string_warning; +show standard_conforming_strings; + +select 'a\bcd' as f1, 'a\b''cd' as f2, 'a\b''''cd' as f3, 'abcd\' as f4, 'ab\''cd' as f5, '\\' as f6; + +set standard_conforming_strings = off; + +select 'a\\bcd' as f1, 'a\\b\'cd' as f2, 'a\\b\'''cd' as f3, 'abcd\\' as f4, 'ab\\\'cd' as f5, '\\\\' as f6; + +set escape_string_warning = off; +set standard_conforming_strings = on; + +select 'a\bcd' as f1, 'a\b''cd' as f2, 'a\b''''cd' as f3, 'abcd\' as f4, 'ab\''cd' as f5, '\\' as f6; + +set standard_conforming_strings = off; + +select 'a\\bcd' as f1, 'a\\b\'cd' as f2, 'a\\b\'''cd' as f3, 'abcd\\' as f4, 'ab\\\'cd' as f5, '\\\\' as f6; + +reset standard_conforming_strings; + + +-- +-- Additional string functions +-- +SET bytea_output TO escape; + +SELECT initcap('hi THOMAS'); + +SELECT lpad('hi', 5, 'xy'); +SELECT lpad('hi', 5); +SELECT lpad('hi', -5, 'xy'); +SELECT lpad('hello', 2); +SELECT lpad('hi', 5, ''); + +SELECT rpad('hi', 5, 'xy'); +SELECT rpad('hi', 5); +SELECT rpad('hi', -5, 'xy'); +SELECT rpad('hello', 2); +SELECT rpad('hi', 5, ''); + +SELECT ltrim('zzzytrim', 'xyz'); + +SELECT translate('', '14', 'ax'); +SELECT translate('12345', '14', 'ax'); + +SELECT ascii('x'); +SELECT ascii(''); + +SELECT chr(65); +SELECT chr(0); + +SELECT repeat('Pg', 4); +SELECT repeat('Pg', -4); + +SELECT SUBSTRING('1234567890'::bytea FROM 3) "34567890"; +SELECT SUBSTRING('1234567890'::bytea FROM 4 FOR 3) AS "456"; +SELECT SUBSTRING('string'::bytea FROM 2 FOR 2147483646) AS "tring"; +SELECT SUBSTRING('string'::bytea FROM -10 FOR 2147483646) AS "string"; +SELECT SUBSTRING('string'::bytea FROM -10 FOR -2147483646) AS "error"; + +SELECT trim(E'\\000'::bytea from E'\\000Tom\\000'::bytea); +SELECT trim(leading E'\\000'::bytea from E'\\000Tom\\000'::bytea); +SELECT trim(trailing E'\\000'::bytea from E'\\000Tom\\000'::bytea); +SELECT btrim(E'\\000trim\\000'::bytea, E'\\000'::bytea); +SELECT btrim(''::bytea, E'\\000'::bytea); +SELECT btrim(E'\\000trim\\000'::bytea, ''::bytea); +SELECT encode(overlay(E'Th\\000omas'::bytea placing E'Th\\001omas'::bytea from 2),'escape'); +SELECT encode(overlay(E'Th\\000omas'::bytea placing E'\\002\\003'::bytea from 8),'escape'); +SELECT encode(overlay(E'Th\\000omas'::bytea placing E'\\002\\003'::bytea from 5 for 3),'escape'); + +SELECT bit_count('\x1234567890'::bytea); + +SELECT unistr('\0064at\+0000610'); +SELECT unistr('d\u0061t\U000000610'); +SELECT unistr('a\\b'); +-- errors: +SELECT unistr('wrong: \db99'); +SELECT unistr('wrong: \db99\0061'); +SELECT unistr('wrong: \+00db99\+000061'); +SELECT unistr('wrong: \+2FFFFF'); +SELECT unistr('wrong: \udb99\u0061'); +SELECT unistr('wrong: \U0000db99\U00000061'); +SELECT unistr('wrong: \U002FFFFF'); +SELECT unistr('wrong: \xyz'); |