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Introduce parse_ident()

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SQL-layer function to split qualified identifier into array parts.

Author: Pavel Stehule with minor editorization by me and Jim Nasby
This commit is contained in:
Teodor Sigaev
2016-03-18 18:16:14 +03:00
parent 992b5ba30d
commit 3187d6de0e
10 changed files with 375 additions and 2 deletions
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66
src/test/regress/expected/name.out
View File

@ -124,3 +124,69 @@ SELECT '' AS two, c.f1 FROM NAME_TBL c WHERE c.f1 ~ '.*asdf.*';
(2 rows)
DROP TABLE NAME_TBL;
DO $$
DECLARE r text[];
BEGIN
r := parse_ident('Schemax.Tabley');
RAISE NOTICE '%', format('%I.%I', r[1], r[2]);
r := parse_ident('"SchemaX"."TableY"');
RAISE NOTICE '%', format('%I.%I', r[1], r[2]);
END;
$$;
NOTICE: schemax.tabley
NOTICE: "SchemaX"."TableY"
SELECT parse_ident('foo.boo');
parse_ident
-------------
{foo,boo}
(1 row)
SELECT parse_ident('foo.boo[]'); -- should fail
ERROR: identifier contains disallowed characters: "foo.boo[]"
SELECT parse_ident('foo.boo[]', strict => false); -- ok
parse_ident
-------------
{foo,boo}
(1 row)
-- should fail
SELECT parse_ident(' ');
ERROR: missing valid identifier: " "
SELECT parse_ident(' .aaa');
ERROR: missing valid identifier before "." symbol: " .aaa"
SELECT parse_ident(' aaa . ');
ERROR: missing valid identifier after "." symbol: " aaa . "
SELECT parse_ident('aaa.a%b');
ERROR: identifier contains disallowed characters: "aaa.a%b"
SELECT parse_ident(E'X\rXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX');
ERROR: identifier contains disallowed characters: "X\rXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
SELECT length(a[1]), length(a[2]) from parse_ident('"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx".yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy') as a ;
length | length
--------+--------
414 | 289
(1 row)
SELECT parse_ident(' first . " second " ." third ". " ' || repeat('x',66) || '"');
parse_ident
-----------------------------------------------------------------------------------------------------------
{first," second "," third "," xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"}
(1 row)
SELECT parse_ident(' first . " second " ." third ". " ' || repeat('x',66) || '"')::name[];
parse_ident
------------------------------------------------------------------------------------------------------
{first," second "," third "," xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"}
(1 row)
SELECT parse_ident(E'"c".X XXXX\002XXXXXX');
ERROR: identifier contains disallowed characters: ""c".X XXXX\u0002XXXXXX"
SELECT parse_ident('1020');
ERROR: missing valid identifier: "1020"
SELECT parse_ident('10.20');
ERROR: missing valid identifier: "10.20"
SELECT parse_ident('.');
ERROR: missing valid identifier before "." symbol: "."
SELECT parse_ident('.1020');
ERROR: missing valid identifier before "." symbol: ".1020"
SELECT parse_ident('xxx.1020');
ERROR: missing valid identifier after "." symbol: "xxx.1020"

33
src/test/regress/sql/name.sql
View File

@ -52,3 +52,36 @@ SELECT '' AS three, c.f1 FROM NAME_TBL c WHERE c.f1 ~ '[0-9]';
SELECT '' AS two, c.f1 FROM NAME_TBL c WHERE c.f1 ~ '.*asdf.*';
DROP TABLE NAME_TBL;
DO $$
DECLARE r text[];
BEGIN
r := parse_ident('Schemax.Tabley');
RAISE NOTICE '%', format('%I.%I', r[1], r[2]);
r := parse_ident('"SchemaX"."TableY"');
RAISE NOTICE '%', format('%I.%I', r[1], r[2]);
END;
$$;
SELECT parse_ident('foo.boo');
SELECT parse_ident('foo.boo[]'); -- should fail
SELECT parse_ident('foo.boo[]', strict => false); -- ok
-- should fail
SELECT parse_ident(' ');
SELECT parse_ident(' .aaa');
SELECT parse_ident(' aaa . ');
SELECT parse_ident('aaa.a%b');
SELECT parse_ident(E'X\rXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX');
SELECT length(a[1]), length(a[2]) from parse_ident('"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx".yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy') as a ;
SELECT parse_ident(' first . " second " ." third ". " ' || repeat('x',66) || '"');
SELECT parse_ident(' first . " second " ." third ". " ' || repeat('x',66) || '"')::name[];
SELECT parse_ident(E'"c".X XXXX\002XXXXXX');
SELECT parse_ident('1020');
SELECT parse_ident('10.20');
SELECT parse_ident('.');
SELECT parse_ident('.1020');
SELECT parse_ident('xxx.1020');