Adjust regex for test with opening parenthesis in character classes

As written, the test was throwing an error because of an unbalanced
parenthesis.  The regex used in the test is adjusted to not fail and to
test the case of an opening parenthesis in a character class after some
nested square brackets.

Oversight in d46911e584d4.

Discussion: https://postgr.es/m/16ab039d1af455652bdf4173402ddda145f2c73b.camel@cybertec.at

diff --git a/src/test/regress/expected/strings.out b/src/test/regress/expected/strings.out
index 28c72ebf67b792a51125b71bc61be7579fc056bd..9ec909e030fce3cb5224f9157c0dcef508975132 100644 (file)
--- a/src/test/regress/expected/strings.out
+++ b/src/test/regress/expected/strings.out
@@ -606,8 +606,13 @@ EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '$[$[:alnum:]$]$'
 (2 rows)
 
 -- Opening parenthesis "("
-EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '([([:alnum:](](';
-ERROR:  invalid regular expression: parentheses () not balanced
+EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '()[([:alnum:](]()';
+                      QUERY PLAN                      
+------------------------------------------------------
+ Seq Scan on text_tbl
+   Filter: (f1 ~ '^(?:(?:)[([:alnum:](](?:))$'::text)
+(2 rows)
+
 -- Caret "^"
 EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '^[^[:alnum:]^[^^][[^^]][\^][[\^]]\^]^';
                                QUERY PLAN                               

diff --git a/src/test/regress/sql/strings.sql b/src/test/regress/sql/strings.sql
index 7667307e21ebf75b9244bcdf35149f60ee6d6c27..0e31e5814b732b5cf7ba1465ad8624a8a495ae79 100644 (file)
--- a/src/test/regress/sql/strings.sql
+++ b/src/test/regress/sql/strings.sql
@@ -198,7 +198,7 @@ EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '.[.[:alnum:].].'
 -- Dollar "$"
 EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '$[$[:alnum:]$]$';
 -- Opening parenthesis "("
-EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '([([:alnum:](](';
+EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '()[([:alnum:](]()';
 -- Caret "^"
 EXPLAIN (COSTS OFF) SELECT * FROM TEXT_TBL WHERE f1 SIMILAR TO '^[^[:alnum:]^[^^][[^^]][\^][[\^]]\^]^';
 -- Closing square bracket "]" at the beginning of character class