1606 lines
44 KiB
Plaintext
1606 lines
44 KiB
Plaintext
--
|
|
-- STRINGS
|
|
-- Test various data entry syntaxes.
|
|
--
|
|
-- SQL92 string continuation syntax
|
|
-- E021-03 character string literals
|
|
SELECT 'first line'
|
|
' - next line'
|
|
' - third line'
|
|
AS "Three lines to one";
|
|
Three lines to one
|
|
-------------------------------------
|
|
first line - next line - third line
|
|
(1 row)
|
|
|
|
-- illegal string continuation syntax
|
|
SELECT 'first line'
|
|
' - next line' /* this comment is not allowed here */
|
|
' - third line'
|
|
AS "Illegal comment within continuation";
|
|
ERROR: syntax error at or near "' - third line'"
|
|
LINE 3: ' - third line'
|
|
^
|
|
-- Unicode escapes
|
|
SET standard_conforming_strings TO on;
|
|
SELECT U&'d\0061t\+000061' AS U&"d\0061t\+000061";
|
|
data
|
|
------
|
|
data
|
|
(1 row)
|
|
|
|
SELECT U&'d!0061t\+000061' UESCAPE '!' AS U&"d*0061t\+000061" UESCAPE '*';
|
|
dat\+000061
|
|
-------------
|
|
dat\+000061
|
|
(1 row)
|
|
|
|
SELECT U&' \' UESCAPE '!' AS "tricky";
|
|
tricky
|
|
--------
|
|
\
|
|
(1 row)
|
|
|
|
SELECT 'tricky' AS U&"\" UESCAPE '!';
|
|
\
|
|
--------
|
|
tricky
|
|
(1 row)
|
|
|
|
SELECT U&'wrong: \061';
|
|
ERROR: invalid Unicode escape value at or near "\061'"
|
|
LINE 1: SELECT U&'wrong: \061';
|
|
^
|
|
SELECT U&'wrong: \+0061';
|
|
ERROR: invalid Unicode escape value at or near "\+0061'"
|
|
LINE 1: SELECT U&'wrong: \+0061';
|
|
^
|
|
SELECT U&'wrong: +0061' UESCAPE '+';
|
|
ERROR: invalid Unicode escape character at or near "+'"
|
|
LINE 1: SELECT U&'wrong: +0061' UESCAPE '+';
|
|
^
|
|
SET standard_conforming_strings TO off;
|
|
SELECT U&'d\0061t\+000061' AS U&"d\0061t\+000061";
|
|
ERROR: unsafe use of string constant with Unicode escapes
|
|
LINE 1: SELECT U&'d\0061t\+000061' AS U&"d\0061t\+000061";
|
|
^
|
|
DETAIL: String constants with Unicode escapes cannot be used when standard_conforming_strings is off.
|
|
SELECT U&'d!0061t\+000061' UESCAPE '!' AS U&"d*0061t\+000061" UESCAPE '*';
|
|
ERROR: unsafe use of string constant with Unicode escapes
|
|
LINE 1: SELECT U&'d!0061t\+000061' UESCAPE '!' AS U&"d*0061t\+000061...
|
|
^
|
|
DETAIL: String constants with Unicode escapes cannot be used when standard_conforming_strings is off.
|
|
SELECT U&' \' UESCAPE '!' AS "tricky";
|
|
ERROR: unsafe use of string constant with Unicode escapes
|
|
LINE 1: SELECT U&' \' UESCAPE '!' AS "tricky";
|
|
^
|
|
DETAIL: String constants with Unicode escapes cannot be used when standard_conforming_strings is off.
|
|
SELECT 'tricky' AS U&"\" UESCAPE '!';
|
|
\
|
|
--------
|
|
tricky
|
|
(1 row)
|
|
|
|
SELECT U&'wrong: \061';
|
|
ERROR: unsafe use of string constant with Unicode escapes
|
|
LINE 1: SELECT U&'wrong: \061';
|
|
^
|
|
DETAIL: String constants with Unicode escapes cannot be used when standard_conforming_strings is off.
|
|
SELECT U&'wrong: \+0061';
|
|
ERROR: unsafe use of string constant with Unicode escapes
|
|
LINE 1: SELECT U&'wrong: \+0061';
|
|
^
|
|
DETAIL: String constants with Unicode escapes cannot be used when standard_conforming_strings is off.
|
|
SELECT U&'wrong: +0061' UESCAPE '+';
|
|
ERROR: unsafe use of string constant with Unicode escapes
|
|
LINE 1: SELECT U&'wrong: +0061' UESCAPE '+';
|
|
^
|
|
DETAIL: String constants with Unicode escapes cannot be used when standard_conforming_strings is off.
|
|
RESET standard_conforming_strings;
|
|
-- bytea
|
|
SET bytea_output TO hex;
|
|
SELECT E'\\xDeAdBeEf'::bytea;
|
|
bytea
|
|
------------
|
|
\xdeadbeef
|
|
(1 row)
|
|
|
|
SELECT E'\\x De Ad Be Ef '::bytea;
|
|
bytea
|
|
------------
|
|
\xdeadbeef
|
|
(1 row)
|
|
|
|
SELECT E'\\xDeAdBeE'::bytea;
|
|
ERROR: invalid hexadecimal data: odd number of digits
|
|
LINE 1: SELECT E'\\xDeAdBeE'::bytea;
|
|
^
|
|
SELECT E'\\xDeAdBeEx'::bytea;
|
|
ERROR: invalid hexadecimal digit: "x"
|
|
LINE 1: SELECT E'\\xDeAdBeEx'::bytea;
|
|
^
|
|
SELECT E'\\xDe00BeEf'::bytea;
|
|
bytea
|
|
------------
|
|
\xde00beef
|
|
(1 row)
|
|
|
|
SELECT E'DeAdBeEf'::bytea;
|
|
bytea
|
|
--------------------
|
|
\x4465416442654566
|
|
(1 row)
|
|
|
|
SELECT E'De\\000dBeEf'::bytea;
|
|
bytea
|
|
--------------------
|
|
\x4465006442654566
|
|
(1 row)
|
|
|
|
SELECT E'De\123dBeEf'::bytea;
|
|
bytea
|
|
--------------------
|
|
\x4465536442654566
|
|
(1 row)
|
|
|
|
SELECT E'De\\123dBeEf'::bytea;
|
|
bytea
|
|
--------------------
|
|
\x4465536442654566
|
|
(1 row)
|
|
|
|
SELECT E'De\\678dBeEf'::bytea;
|
|
ERROR: invalid input syntax for type bytea
|
|
LINE 1: SELECT E'De\\678dBeEf'::bytea;
|
|
^
|
|
SET bytea_output TO escape;
|
|
SELECT E'\\xDeAdBeEf'::bytea;
|
|
bytea
|
|
------------------
|
|
\336\255\276\357
|
|
(1 row)
|
|
|
|
SELECT E'\\x De Ad Be Ef '::bytea;
|
|
bytea
|
|
------------------
|
|
\336\255\276\357
|
|
(1 row)
|
|
|
|
SELECT E'\\xDe00BeEf'::bytea;
|
|
bytea
|
|
------------------
|
|
\336\000\276\357
|
|
(1 row)
|
|
|
|
SELECT E'DeAdBeEf'::bytea;
|
|
bytea
|
|
----------
|
|
DeAdBeEf
|
|
(1 row)
|
|
|
|
SELECT E'De\\000dBeEf'::bytea;
|
|
bytea
|
|
-------------
|
|
De\000dBeEf
|
|
(1 row)
|
|
|
|
SELECT E'De\\123dBeEf'::bytea;
|
|
bytea
|
|
----------
|
|
DeSdBeEf
|
|
(1 row)
|
|
|
|
--
|
|
-- 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;
|
|
text(char)
|
|
------------
|
|
a
|
|
ab
|
|
abcd
|
|
abcd
|
|
(4 rows)
|
|
|
|
SELECT CAST(f1 AS text) AS "text(varchar)" FROM VARCHAR_TBL;
|
|
text(varchar)
|
|
---------------
|
|
a
|
|
ab
|
|
abcd
|
|
abcd
|
|
(4 rows)
|
|
|
|
SELECT CAST(name 'namefield' AS text) AS "text(name)";
|
|
text(name)
|
|
------------
|
|
namefield
|
|
(1 row)
|
|
|
|
-- since this is an explicit cast, it should truncate w/o error:
|
|
SELECT CAST(f1 AS char(10)) AS "char(text)" FROM TEXT_TBL;
|
|
char(text)
|
|
------------
|
|
doh!
|
|
hi de ho n
|
|
(2 rows)
|
|
|
|
-- note: implicit-cast case is tested in char.sql
|
|
SELECT CAST(f1 AS char(20)) AS "char(text)" FROM TEXT_TBL;
|
|
char(text)
|
|
----------------------
|
|
doh!
|
|
hi de ho neighbor
|
|
(2 rows)
|
|
|
|
SELECT CAST(f1 AS char(10)) AS "char(varchar)" FROM VARCHAR_TBL;
|
|
char(varchar)
|
|
---------------
|
|
a
|
|
ab
|
|
abcd
|
|
abcd
|
|
(4 rows)
|
|
|
|
SELECT CAST(name 'namefield' AS char(10)) AS "char(name)";
|
|
char(name)
|
|
------------
|
|
namefield
|
|
(1 row)
|
|
|
|
SELECT CAST(f1 AS varchar) AS "varchar(text)" FROM TEXT_TBL;
|
|
varchar(text)
|
|
-------------------
|
|
doh!
|
|
hi de ho neighbor
|
|
(2 rows)
|
|
|
|
SELECT CAST(f1 AS varchar) AS "varchar(char)" FROM CHAR_TBL;
|
|
varchar(char)
|
|
---------------
|
|
a
|
|
ab
|
|
abcd
|
|
abcd
|
|
(4 rows)
|
|
|
|
SELECT CAST(name 'namefield' AS varchar) AS "varchar(name)";
|
|
varchar(name)
|
|
---------------
|
|
namefield
|
|
(1 row)
|
|
|
|
--
|
|
-- test SQL92 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";
|
|
bunch o blanks
|
|
----------------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT TRIM(LEADING FROM ' bunch o blanks ') = 'bunch o blanks ' AS "bunch o blanks ";
|
|
bunch o blanks
|
|
------------------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT TRIM(TRAILING FROM ' bunch o blanks ') = ' bunch o blanks' AS " bunch o blanks";
|
|
bunch o blanks
|
|
------------------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT TRIM(BOTH 'x' FROM 'xxxxxsome Xsxxxxx') = 'some Xs' AS "some Xs";
|
|
some Xs
|
|
---------
|
|
t
|
|
(1 row)
|
|
|
|
-- E021-06 substring expression
|
|
SELECT SUBSTRING('1234567890' FROM 3) = '34567890' AS "34567890";
|
|
34567890
|
|
----------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT SUBSTRING('1234567890' FROM 4 FOR 3) = '456' AS "456";
|
|
456
|
|
-----
|
|
t
|
|
(1 row)
|
|
|
|
-- T581 regular expression substring (with SQL99's bizarre regexp syntax)
|
|
SELECT SUBSTRING('abcdefg' FROM 'a#"(b_d)#"%' FOR '#') AS "bcd";
|
|
bcd
|
|
-----
|
|
bcd
|
|
(1 row)
|
|
|
|
-- No match should return NULL
|
|
SELECT SUBSTRING('abcdefg' FROM '#"(b_d)#"%' FOR '#') IS NULL AS "True";
|
|
True
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
-- Null inputs should return NULL
|
|
SELECT SUBSTRING('abcdefg' FROM '(b|c)' FOR NULL) IS NULL AS "True";
|
|
True
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT SUBSTRING(NULL FROM '(b|c)' FOR '#') IS NULL AS "True";
|
|
True
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT SUBSTRING('abcdefg' FROM NULL FOR '#') IS NULL AS "True";
|
|
True
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
-- PostgreSQL extension to allow omitting the escape character;
|
|
-- here the regexp is taken as Posix syntax
|
|
SELECT SUBSTRING('abcdefg' FROM 'c.e') AS "cde";
|
|
cde
|
|
-----
|
|
cde
|
|
(1 row)
|
|
|
|
-- With a parenthesized subexpression, return only what matches the subexpr
|
|
SELECT SUBSTRING('abcdefg' FROM 'b(.*)f') AS "cde";
|
|
cde
|
|
-----
|
|
cde
|
|
(1 row)
|
|
|
|
-- PostgreSQL extension to allow using back reference in replace string;
|
|
SELECT regexp_replace('1112223333', E'(\\d{3})(\\d{3})(\\d{4})', E'(\\1) \\2-\\3');
|
|
regexp_replace
|
|
----------------
|
|
(111) 222-3333
|
|
(1 row)
|
|
|
|
SELECT regexp_replace('AAA BBB CCC ', E'\\s+', ' ', 'g');
|
|
regexp_replace
|
|
----------------
|
|
AAA BBB CCC
|
|
(1 row)
|
|
|
|
SELECT regexp_replace('AAA', '^|$', 'Z', 'g');
|
|
regexp_replace
|
|
----------------
|
|
ZAAAZ
|
|
(1 row)
|
|
|
|
SELECT regexp_replace('AAA aaa', 'A+', 'Z', 'gi');
|
|
regexp_replace
|
|
----------------
|
|
Z Z
|
|
(1 row)
|
|
|
|
-- invalid regexp option
|
|
SELECT regexp_replace('AAA aaa', 'A+', 'Z', 'z');
|
|
ERROR: invalid regexp option: "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)$re$);
|
|
regexp_matches
|
|
----------------
|
|
{bar,beque}
|
|
(1 row)
|
|
|
|
-- test case insensitive
|
|
SELECT regexp_matches('foObARbEqUEbAz', $re$(bar)(beque)$re$, 'i');
|
|
regexp_matches
|
|
----------------
|
|
{bAR,bEqUE}
|
|
(1 row)
|
|
|
|
-- global option - more than one match
|
|
SELECT regexp_matches('foobarbequebazilbarfbonk', $re$(b[^b]+)(b[^b]+)$re$, 'g');
|
|
regexp_matches
|
|
----------------
|
|
{bar,beque}
|
|
{bazil,barf}
|
|
(2 rows)
|
|
|
|
-- empty capture group (matched empty string)
|
|
SELECT regexp_matches('foobarbequebaz', $re$(bar)(.*)(beque)$re$);
|
|
regexp_matches
|
|
----------------
|
|
{bar,"",beque}
|
|
(1 row)
|
|
|
|
-- no match
|
|
SELECT regexp_matches('foobarbequebaz', $re$(bar)(.+)(beque)$re$);
|
|
regexp_matches
|
|
----------------
|
|
(0 rows)
|
|
|
|
-- optional capture group did not match, null entry in array
|
|
SELECT regexp_matches('foobarbequebaz', $re$(bar)(.+)?(beque)$re$);
|
|
regexp_matches
|
|
------------------
|
|
{bar,NULL,beque}
|
|
(1 row)
|
|
|
|
-- no capture groups
|
|
SELECT regexp_matches('foobarbequebaz', $re$barbeque$re$);
|
|
regexp_matches
|
|
----------------
|
|
{barbeque}
|
|
(1 row)
|
|
|
|
-- give me errors
|
|
SELECT regexp_matches('foobarbequebaz', $re$(bar)(beque)$re$, 'gz');
|
|
ERROR: invalid regexp option: "z"
|
|
SELECT regexp_matches('foobarbequebaz', $re$(barbeque$re$);
|
|
ERROR: invalid regular expression: parentheses () not balanced
|
|
SELECT regexp_matches('foobarbequebaz', $re$(bar)(beque){2,1}$re$);
|
|
ERROR: invalid regular expression: invalid repetition count(s)
|
|
-- split string on regexp
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumped over the lazy dog', $re$\s+$re$) AS foo;
|
|
foo | length
|
|
--------+--------
|
|
the | 3
|
|
quick | 5
|
|
brown | 5
|
|
fox | 3
|
|
jumped | 6
|
|
over | 4
|
|
the | 3
|
|
lazy | 4
|
|
dog | 3
|
|
(9 rows)
|
|
|
|
SELECT regexp_split_to_array('the quick brown fox jumped over the lazy dog', $re$\s+$re$);
|
|
regexp_split_to_array
|
|
------------------------------------------------
|
|
{the,quick,brown,fox,jumped,over,the,lazy,dog}
|
|
(1 row)
|
|
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumped over the lazy dog', $re$\s*$re$) AS foo;
|
|
foo | length
|
|
-----+--------
|
|
t | 1
|
|
h | 1
|
|
e | 1
|
|
q | 1
|
|
u | 1
|
|
i | 1
|
|
c | 1
|
|
k | 1
|
|
b | 1
|
|
r | 1
|
|
o | 1
|
|
w | 1
|
|
n | 1
|
|
f | 1
|
|
o | 1
|
|
x | 1
|
|
j | 1
|
|
u | 1
|
|
m | 1
|
|
p | 1
|
|
e | 1
|
|
d | 1
|
|
o | 1
|
|
v | 1
|
|
e | 1
|
|
r | 1
|
|
t | 1
|
|
h | 1
|
|
e | 1
|
|
l | 1
|
|
a | 1
|
|
z | 1
|
|
y | 1
|
|
d | 1
|
|
o | 1
|
|
g | 1
|
|
(36 rows)
|
|
|
|
SELECT regexp_split_to_array('the quick brown fox jumped over the lazy dog', $re$\s*$re$);
|
|
regexp_split_to_array
|
|
---------------------------------------------------------------------------
|
|
{t,h,e,q,u,i,c,k,b,r,o,w,n,f,o,x,j,u,m,p,e,d,o,v,e,r,t,h,e,l,a,z,y,d,o,g}
|
|
(1 row)
|
|
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumped over the lazy dog', '') AS foo;
|
|
foo | length
|
|
-----+--------
|
|
t | 1
|
|
h | 1
|
|
e | 1
|
|
| 1
|
|
q | 1
|
|
u | 1
|
|
i | 1
|
|
c | 1
|
|
k | 1
|
|
| 1
|
|
b | 1
|
|
r | 1
|
|
o | 1
|
|
w | 1
|
|
n | 1
|
|
| 1
|
|
f | 1
|
|
o | 1
|
|
x | 1
|
|
| 1
|
|
j | 1
|
|
u | 1
|
|
m | 1
|
|
p | 1
|
|
e | 1
|
|
d | 1
|
|
| 1
|
|
o | 1
|
|
v | 1
|
|
e | 1
|
|
r | 1
|
|
| 1
|
|
t | 1
|
|
h | 1
|
|
e | 1
|
|
| 1
|
|
l | 1
|
|
a | 1
|
|
z | 1
|
|
y | 1
|
|
| 1
|
|
d | 1
|
|
o | 1
|
|
g | 1
|
|
(44 rows)
|
|
|
|
SELECT regexp_split_to_array('the quick brown fox jumped over the lazy dog', '');
|
|
regexp_split_to_array
|
|
-----------------------------------------------------------------------------------------------------------
|
|
{t,h,e," ",q,u,i,c,k," ",b,r,o,w,n," ",f,o,x," ",j,u,m,p,e,d," ",o,v,e,r," ",t,h,e," ",l,a,z,y," ",d,o,g}
|
|
(1 row)
|
|
|
|
-- case insensitive
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('thE QUick bROWn FOx jUMPed ovEr THE lazy dOG', 'e', 'i') AS foo;
|
|
foo | length
|
|
-----------------------+--------
|
|
th | 2
|
|
QUick bROWn FOx jUMP | 21
|
|
d ov | 4
|
|
r TH | 4
|
|
lazy dOG | 9
|
|
(5 rows)
|
|
|
|
SELECT regexp_split_to_array('thE QUick bROWn FOx jUMPed ovEr THE lazy dOG', 'e', 'i');
|
|
regexp_split_to_array
|
|
--------------------------------------------------------
|
|
{th," QUick bROWn FOx jUMP","d ov","r TH"," lazy dOG"}
|
|
(1 row)
|
|
|
|
-- no match of pattern
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('the quick brown fox jumped over the lazy dog', 'nomatch') AS foo;
|
|
foo | length
|
|
----------------------------------------------+--------
|
|
the quick brown fox jumped over the lazy dog | 44
|
|
(1 row)
|
|
|
|
SELECT regexp_split_to_array('the quick brown fox jumped over the lazy dog', 'nomatch');
|
|
regexp_split_to_array
|
|
--------------------------------------------------
|
|
{"the quick brown fox jumped over the lazy dog"}
|
|
(1 row)
|
|
|
|
-- some corner cases
|
|
SELECT regexp_split_to_array('123456','1');
|
|
regexp_split_to_array
|
|
-----------------------
|
|
{"",23456}
|
|
(1 row)
|
|
|
|
SELECT regexp_split_to_array('123456','6');
|
|
regexp_split_to_array
|
|
-----------------------
|
|
{12345,""}
|
|
(1 row)
|
|
|
|
SELECT regexp_split_to_array('123456','.');
|
|
regexp_split_to_array
|
|
------------------------
|
|
{"","","","","","",""}
|
|
(1 row)
|
|
|
|
-- errors
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('thE QUick bROWn FOx jUMPed ovEr THE lazy dOG', 'e', 'zippy') AS foo;
|
|
ERROR: invalid regexp option: "z"
|
|
SELECT regexp_split_to_array('thE QUick bROWn FOx jUMPed ovEr THE lazy dOG', 'e', 'iz');
|
|
ERROR: invalid regexp option: "z"
|
|
-- global option meaningless for regexp_split
|
|
SELECT foo, length(foo) FROM regexp_split_to_table('thE QUick bROWn FOx jUMPed ovEr THE lazy dOG', 'e', 'g') AS foo;
|
|
ERROR: regexp_split does not support the global option
|
|
SELECT regexp_split_to_array('thE QUick bROWn FOx jUMPed ovEr THE lazy dOG', 'e', 'g');
|
|
ERROR: regexp_split does not support the global option
|
|
-- change NULL-display back
|
|
\pset null ''
|
|
-- E021-11 position expression
|
|
SELECT POSITION('4' IN '1234567890') = '4' AS "4";
|
|
4
|
|
---
|
|
t
|
|
(1 row)
|
|
|
|
SELECT POSITION('5' IN '1234567890') = '5' AS "5";
|
|
5
|
|
---
|
|
t
|
|
(1 row)
|
|
|
|
-- T312 character overlay function
|
|
SELECT OVERLAY('abcdef' PLACING '45' FROM 4) AS "abc45f";
|
|
abc45f
|
|
--------
|
|
abc45f
|
|
(1 row)
|
|
|
|
SELECT OVERLAY('yabadoo' PLACING 'daba' FROM 5) AS "yabadaba";
|
|
yabadaba
|
|
----------
|
|
yabadaba
|
|
(1 row)
|
|
|
|
SELECT OVERLAY('yabadoo' PLACING 'daba' FROM 5 FOR 0) AS "yabadabadoo";
|
|
yabadabadoo
|
|
-------------
|
|
yabadabadoo
|
|
(1 row)
|
|
|
|
SELECT OVERLAY('babosa' PLACING 'ubb' FROM 2 FOR 4) AS "bubba";
|
|
bubba
|
|
-------
|
|
bubba
|
|
(1 row)
|
|
|
|
--
|
|
-- 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";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT LIKE 'h%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' LIKE 'H%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT LIKE 'H%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' LIKE 'indio%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT LIKE 'indio%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' LIKE 'h%eye' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT LIKE 'h%eye' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'indio' LIKE '_ndio' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'indio' NOT LIKE '_ndio' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'indio' LIKE 'in__o' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'indio' NOT LIKE 'in__o' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'indio' LIKE 'in_o' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'indio' NOT LIKE 'in_o' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
-- unused escape character
|
|
SELECT 'hawkeye' LIKE 'h%' ESCAPE '#' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT LIKE 'h%' ESCAPE '#' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'indio' LIKE 'ind_o' ESCAPE '$' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'indio' NOT LIKE 'ind_o' ESCAPE '$' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
-- escape character
|
|
-- E061-05 like predicate with escape clause
|
|
SELECT 'h%' LIKE 'h#%' ESCAPE '#' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'h%' NOT LIKE 'h#%' ESCAPE '#' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'h%wkeye' LIKE 'h#%' ESCAPE '#' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'h%wkeye' NOT LIKE 'h#%' ESCAPE '#' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'h%wkeye' LIKE 'h#%%' ESCAPE '#' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'h%wkeye' NOT LIKE 'h#%%' ESCAPE '#' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'h%awkeye' LIKE 'h#%a%k%e' ESCAPE '#' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'h%awkeye' NOT LIKE 'h#%a%k%e' ESCAPE '#' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'indio' LIKE '_ndio' ESCAPE '$' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'indio' NOT LIKE '_ndio' ESCAPE '$' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'i_dio' LIKE 'i$_d_o' ESCAPE '$' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'i_dio' NOT LIKE 'i$_d_o' ESCAPE '$' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'i_dio' LIKE 'i$_nd_o' ESCAPE '$' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'i_dio' NOT LIKE 'i$_nd_o' ESCAPE '$' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'i_dio' LIKE 'i$_d%o' ESCAPE '$' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'i_dio' NOT LIKE 'i$_d%o' ESCAPE '$' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
-- escape character same as pattern character
|
|
SELECT 'maca' LIKE 'm%aca' ESCAPE '%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'maca' NOT LIKE 'm%aca' ESCAPE '%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'ma%a' LIKE 'm%a%%a' ESCAPE '%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'ma%a' NOT LIKE 'm%a%%a' ESCAPE '%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'bear' LIKE 'b_ear' ESCAPE '_' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'bear' NOT LIKE 'b_ear' ESCAPE '_' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'be_r' LIKE 'b_e__r' ESCAPE '_' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'be_r' NOT LIKE 'b_e__r' ESCAPE '_' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'be_r' LIKE '__e__r' ESCAPE '_' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'be_r' NOT LIKE '__e__r' ESCAPE '_' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
--
|
|
-- test ILIKE (case-insensitive LIKE)
|
|
-- Be sure to form every test as an ILIKE/NOT ILIKE pair.
|
|
--
|
|
SELECT 'hawkeye' ILIKE 'h%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT ILIKE 'h%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' ILIKE 'H%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT ILIKE 'H%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' ILIKE 'H%Eye' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'hawkeye' NOT ILIKE 'H%Eye' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
SELECT 'Hawkeye' ILIKE 'h%' AS "true";
|
|
true
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT 'Hawkeye' NOT ILIKE 'h%' AS "false";
|
|
false
|
|
-------
|
|
f
|
|
(1 row)
|
|
|
|
--
|
|
-- test %/_ combination cases, cf bugs #4821 and #5478
|
|
--
|
|
SELECT 'foo' LIKE '_%' as t, 'f' LIKE '_%' as t, '' LIKE '_%' as f;
|
|
t | t | f
|
|
---+---+---
|
|
t | t | f
|
|
(1 row)
|
|
|
|
SELECT 'foo' LIKE '%_' as t, 'f' LIKE '%_' as t, '' LIKE '%_' as f;
|
|
t | t | f
|
|
---+---+---
|
|
t | t | f
|
|
(1 row)
|
|
|
|
SELECT 'foo' LIKE '__%' as t, 'foo' LIKE '___%' as t, 'foo' LIKE '____%' as f;
|
|
t | t | f
|
|
---+---+---
|
|
t | t | f
|
|
(1 row)
|
|
|
|
SELECT 'foo' LIKE '%__' as t, 'foo' LIKE '%___' as t, 'foo' LIKE '%____' as f;
|
|
t | t | f
|
|
---+---+---
|
|
t | t | f
|
|
(1 row)
|
|
|
|
SELECT 'jack' LIKE '%____%' AS t;
|
|
t
|
|
---
|
|
t
|
|
(1 row)
|
|
|
|
--
|
|
-- test implicit type conversion
|
|
--
|
|
-- E021-07 character concatenation
|
|
SELECT 'unknown' || ' and unknown' AS "Concat unknown types";
|
|
Concat unknown types
|
|
----------------------
|
|
unknown and unknown
|
|
(1 row)
|
|
|
|
SELECT text 'text' || ' and unknown' AS "Concat text to unknown type";
|
|
Concat text to unknown type
|
|
-----------------------------
|
|
text and unknown
|
|
(1 row)
|
|
|
|
SELECT char(20) 'characters' || ' and text' AS "Concat char to unknown type";
|
|
Concat char to unknown type
|
|
-----------------------------
|
|
characters and text
|
|
(1 row)
|
|
|
|
SELECT text 'text' || char(20) ' and characters' AS "Concat text to char";
|
|
Concat text to char
|
|
---------------------
|
|
text and characters
|
|
(1 row)
|
|
|
|
SELECT text 'text' || varchar ' and varchar' AS "Concat text to varchar";
|
|
Concat text to varchar
|
|
------------------------
|
|
text and varchar
|
|
(1 row)
|
|
|
|
--
|
|
-- 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 SQL92.
|
|
SELECT substr(f1, -1, 5) from toasttest;
|
|
substr
|
|
--------
|
|
123
|
|
123
|
|
123
|
|
123
|
|
(4 rows)
|
|
|
|
-- If the length is less than zero, an ERROR is thrown.
|
|
SELECT substr(f1, 5, -1) from toasttest;
|
|
ERROR: negative substring length not allowed
|
|
-- If no third argument (length) is provided, the length to the end of the
|
|
-- string is assumed.
|
|
SELECT substr(f1, 99995) from toasttest;
|
|
substr
|
|
--------
|
|
567890
|
|
567890
|
|
567890
|
|
567890
|
|
(4 rows)
|
|
|
|
-- If start plus length is > string length, the result is truncated to
|
|
-- string length
|
|
SELECT substr(f1, 99995, 10) from toasttest;
|
|
substr
|
|
--------
|
|
567890
|
|
567890
|
|
567890
|
|
567890
|
|
(4 rows)
|
|
|
|
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 SQL92.
|
|
SELECT substr(f1, -1, 5) from toasttest;
|
|
substr
|
|
--------
|
|
123
|
|
123
|
|
123
|
|
123
|
|
(4 rows)
|
|
|
|
-- If the length is less than zero, an ERROR is thrown.
|
|
SELECT substr(f1, 5, -1) from toasttest;
|
|
ERROR: negative substring length not allowed
|
|
-- If no third argument (length) is provided, the length to the end of the
|
|
-- string is assumed.
|
|
SELECT substr(f1, 99995) from toasttest;
|
|
substr
|
|
--------
|
|
567890
|
|
567890
|
|
567890
|
|
567890
|
|
(4 rows)
|
|
|
|
-- If start plus length is > string length, the result is truncated to
|
|
-- string length
|
|
SELECT substr(f1, 99995, 10) from toasttest;
|
|
substr
|
|
--------
|
|
567890
|
|
567890
|
|
567890
|
|
567890
|
|
(4 rows)
|
|
|
|
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;
|
|
length | c
|
|
--------+---
|
|
1 | x
|
|
(1 row)
|
|
|
|
SELECT c FROM toasttest;
|
|
c
|
|
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|
x
|
|
(1 row)
|
|
|
|
DROP TABLE toasttest;
|
|
--
|
|
-- test length
|
|
--
|
|
SELECT length('abcdef') AS "length_6";
|
|
length_6
|
|
----------
|
|
6
|
|
(1 row)
|
|
|
|
--
|
|
-- test strpos
|
|
--
|
|
SELECT strpos('abcdef', 'cd') AS "pos_3";
|
|
pos_3
|
|
-------
|
|
3
|
|
(1 row)
|
|
|
|
SELECT strpos('abcdef', 'xy') AS "pos_0";
|
|
pos_0
|
|
-------
|
|
0
|
|
(1 row)
|
|
|
|
--
|
|
-- test replace
|
|
--
|
|
SELECT replace('abcdef', 'de', '45') AS "abc45f";
|
|
abc45f
|
|
--------
|
|
abc45f
|
|
(1 row)
|
|
|
|
SELECT replace('yabadabadoo', 'ba', '123') AS "ya123da123doo";
|
|
ya123da123doo
|
|
---------------
|
|
ya123da123doo
|
|
(1 row)
|
|
|
|
SELECT replace('yabadoo', 'bad', '') AS "yaoo";
|
|
yaoo
|
|
------
|
|
yaoo
|
|
(1 row)
|
|
|
|
--
|
|
-- test split_part
|
|
--
|
|
select split_part('joeuser@mydatabase','@',0) AS "an error";
|
|
ERROR: field position must be greater than zero
|
|
select split_part('joeuser@mydatabase','@',1) AS "joeuser";
|
|
joeuser
|
|
---------
|
|
joeuser
|
|
(1 row)
|
|
|
|
select split_part('joeuser@mydatabase','@',2) AS "mydatabase";
|
|
mydatabase
|
|
------------
|
|
mydatabase
|
|
(1 row)
|
|
|
|
select split_part('joeuser@mydatabase','@',3) AS "empty string";
|
|
empty string
|
|
--------------
|
|
|
|
(1 row)
|
|
|
|
select split_part('@joeuser@mydatabase@','@',2) AS "joeuser";
|
|
joeuser
|
|
---------
|
|
joeuser
|
|
(1 row)
|
|
|
|
--
|
|
-- test to_hex
|
|
--
|
|
select to_hex(256*256*256 - 1) AS "ffffff";
|
|
ffffff
|
|
--------
|
|
ffffff
|
|
(1 row)
|
|
|
|
select to_hex(256::bigint*256::bigint*256::bigint*256::bigint - 1) AS "ffffffff";
|
|
ffffffff
|
|
----------
|
|
ffffffff
|
|
(1 row)
|
|
|
|
--
|
|
-- MD5 test suite - from IETF RFC 1321
|
|
-- (see: ftp://ftp.rfc-editor.org/in-notes/rfc1321.txt)
|
|
--
|
|
select md5('') = 'd41d8cd98f00b204e9800998ecf8427e' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('a') = '0cc175b9c0f1b6a831c399e269772661' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('abc') = '900150983cd24fb0d6963f7d28e17f72' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('message digest') = 'f96b697d7cb7938d525a2f31aaf161d0' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('abcdefghijklmnopqrstuvwxyz') = 'c3fcd3d76192e4007dfb496cca67e13b' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789') = 'd174ab98d277d9f5a5611c2c9f419d9f' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('12345678901234567890123456789012345678901234567890123456789012345678901234567890') = '57edf4a22be3c955ac49da2e2107b67a' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5(''::bytea) = 'd41d8cd98f00b204e9800998ecf8427e' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('a'::bytea) = '0cc175b9c0f1b6a831c399e269772661' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('abc'::bytea) = '900150983cd24fb0d6963f7d28e17f72' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('message digest'::bytea) = 'f96b697d7cb7938d525a2f31aaf161d0' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('abcdefghijklmnopqrstuvwxyz'::bytea) = 'c3fcd3d76192e4007dfb496cca67e13b' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'::bytea) = 'd174ab98d277d9f5a5611c2c9f419d9f' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
select md5('12345678901234567890123456789012345678901234567890123456789012345678901234567890'::bytea) = '57edf4a22be3c955ac49da2e2107b67a' AS "TRUE";
|
|
TRUE
|
|
------
|
|
t
|
|
(1 row)
|
|
|
|
--
|
|
-- 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;
|
|
escape_string_warning
|
|
-----------------------
|
|
off
|
|
(1 row)
|
|
|
|
show standard_conforming_strings;
|
|
standard_conforming_strings
|
|
-----------------------------
|
|
off
|
|
(1 row)
|
|
|
|
set escape_string_warning = on;
|
|
set standard_conforming_strings = on;
|
|
show escape_string_warning;
|
|
escape_string_warning
|
|
-----------------------
|
|
on
|
|
(1 row)
|
|
|
|
show standard_conforming_strings;
|
|
standard_conforming_strings
|
|
-----------------------------
|
|
on
|
|
(1 row)
|
|
|
|
select 'a\bcd' as f1, 'a\b''cd' as f2, 'a\b''''cd' as f3, 'abcd\' as f4, 'ab\''cd' as f5, '\\' as f6;
|
|
f1 | f2 | f3 | f4 | f5 | f6
|
|
-------+--------+---------+-------+--------+----
|
|
a\bcd | a\b'cd | a\b''cd | abcd\ | ab\'cd | \\
|
|
(1 row)
|
|
|
|
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;
|
|
WARNING: nonstandard use of \\ in a string literal
|
|
LINE 1: select 'a\\bcd' as f1, 'a\\b\'cd' as f2, 'a\\b\'''cd' as f3,...
|
|
^
|
|
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
|
|
WARNING: nonstandard use of \\ in a string literal
|
|
LINE 1: select 'a\\bcd' as f1, 'a\\b\'cd' as f2, 'a\\b\'''cd' as f3,...
|
|
^
|
|
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
|
|
WARNING: nonstandard use of \\ in a string literal
|
|
LINE 1: select 'a\\bcd' as f1, 'a\\b\'cd' as f2, 'a\\b\'''cd' as f3,...
|
|
^
|
|
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
|
|
WARNING: nonstandard use of \\ in a string literal
|
|
LINE 1: ...bcd' as f1, 'a\\b\'cd' as f2, 'a\\b\'''cd' as f3, 'abcd\\' ...
|
|
^
|
|
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
|
|
WARNING: nonstandard use of \\ in a string literal
|
|
LINE 1: ...'cd' as f2, 'a\\b\'''cd' as f3, 'abcd\\' as f4, 'ab\\\'cd'...
|
|
^
|
|
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
|
|
WARNING: nonstandard use of \\ in a string literal
|
|
LINE 1: ...'''cd' as f3, 'abcd\\' as f4, 'ab\\\'cd' as f5, '\\\\' as ...
|
|
^
|
|
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
|
|
f1 | f2 | f3 | f4 | f5 | f6
|
|
-------+--------+---------+-------+--------+----
|
|
a\bcd | a\b'cd | a\b''cd | abcd\ | ab\'cd | \\
|
|
(1 row)
|
|
|
|
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;
|
|
f1 | f2 | f3 | f4 | f5 | f6
|
|
-------+--------+---------+-------+--------+----
|
|
a\bcd | a\b'cd | a\b''cd | abcd\ | ab\'cd | \\
|
|
(1 row)
|
|
|
|
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;
|
|
f1 | f2 | f3 | f4 | f5 | f6
|
|
-------+--------+---------+-------+--------+----
|
|
a\bcd | a\b'cd | a\b''cd | abcd\ | ab\'cd | \\
|
|
(1 row)
|
|
|
|
--
|
|
-- Additional string functions
|
|
--
|
|
SELECT initcap('hi THOMAS');
|
|
initcap
|
|
-----------
|
|
Hi Thomas
|
|
(1 row)
|
|
|
|
SELECT lpad('hi', 5, 'xy');
|
|
lpad
|
|
-------
|
|
xyxhi
|
|
(1 row)
|
|
|
|
SELECT lpad('hi', 5);
|
|
lpad
|
|
-------
|
|
hi
|
|
(1 row)
|
|
|
|
SELECT lpad('hi', -5, 'xy');
|
|
lpad
|
|
------
|
|
|
|
(1 row)
|
|
|
|
SELECT lpad('hello', 2);
|
|
lpad
|
|
------
|
|
he
|
|
(1 row)
|
|
|
|
SELECT lpad('hi', 5, '');
|
|
lpad
|
|
------
|
|
hi
|
|
(1 row)
|
|
|
|
SELECT rpad('hi', 5, 'xy');
|
|
rpad
|
|
-------
|
|
hixyx
|
|
(1 row)
|
|
|
|
SELECT rpad('hi', 5);
|
|
rpad
|
|
-------
|
|
hi
|
|
(1 row)
|
|
|
|
SELECT rpad('hi', -5, 'xy');
|
|
rpad
|
|
------
|
|
|
|
(1 row)
|
|
|
|
SELECT rpad('hello', 2);
|
|
rpad
|
|
------
|
|
he
|
|
(1 row)
|
|
|
|
SELECT rpad('hi', 5, '');
|
|
rpad
|
|
------
|
|
hi
|
|
(1 row)
|
|
|
|
SELECT ltrim('zzzytrim', 'xyz');
|
|
ltrim
|
|
-------
|
|
trim
|
|
(1 row)
|
|
|
|
SELECT translate('', '14', 'ax');
|
|
translate
|
|
-----------
|
|
|
|
(1 row)
|
|
|
|
SELECT translate('12345', '14', 'ax');
|
|
translate
|
|
-----------
|
|
a23x5
|
|
(1 row)
|
|
|
|
SELECT ascii('x');
|
|
ascii
|
|
-------
|
|
120
|
|
(1 row)
|
|
|
|
SELECT ascii('');
|
|
ascii
|
|
-------
|
|
0
|
|
(1 row)
|
|
|
|
SELECT chr(65);
|
|
chr
|
|
-----
|
|
A
|
|
(1 row)
|
|
|
|
SELECT chr(0);
|
|
ERROR: null character not permitted
|
|
SELECT repeat('Pg', 4);
|
|
repeat
|
|
----------
|
|
PgPgPgPg
|
|
(1 row)
|
|
|
|
SELECT repeat('Pg', -4);
|
|
repeat
|
|
--------
|
|
|
|
(1 row)
|
|
|
|
SELECT trim(E'\\000'::bytea from E'\\000Tom\\000'::bytea);
|
|
btrim
|
|
-------
|
|
Tom
|
|
(1 row)
|
|
|
|
SELECT btrim(E'\\000trim\\000'::bytea, E'\\000'::bytea);
|
|
btrim
|
|
-------
|
|
trim
|
|
(1 row)
|
|
|
|
SELECT btrim(''::bytea, E'\\000'::bytea);
|
|
btrim
|
|
-------
|
|
|
|
(1 row)
|
|
|
|
SELECT btrim(E'\\000trim\\000'::bytea, ''::bytea);
|
|
btrim
|
|
--------------
|
|
\000trim\000
|
|
(1 row)
|
|
|
|
SELECT encode(overlay(E'Th\\000omas'::bytea placing E'Th\\001omas'::bytea from 2),'escape');
|
|
encode
|
|
-------------
|
|
TTh\x01omas
|
|
(1 row)
|
|
|
|
SELECT encode(overlay(E'Th\\000omas'::bytea placing E'\\002\\003'::bytea from 8),'escape');
|
|
encode
|
|
--------------------
|
|
Th\000omas\x02\x03
|
|
(1 row)
|
|
|
|
SELECT encode(overlay(E'Th\\000omas'::bytea placing E'\\002\\003'::bytea from 5 for 3),'escape');
|
|
encode
|
|
-----------------
|
|
Th\000o\x02\x03
|
|
(1 row)
|
|
|