Result of boolean expression can not be concatenated with string literal
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Key: CORE-5408
URL: http://tracker.firebirdsql.org/browse/CORE-5408
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.1, 4.0 Initial
Reporter: Pavel Zotov
SQL> select true || 'aaa' from rdb$database;
CONCATENATION
=============
TRUEaaa
(OK, expected)
SQL> select (true = true)|| 'aaa' from rdb$database;
Statement failed, SQLSTATE = 42000
Dynamic SQL Error
-SQL error code = -104
-Token unknown - line 1, column 21
-||
SQL> select (true is true)|| 'aaa' from rdb$database;
Statement failed, SQLSTATE = 42000
Dynamic SQL Error
-SQL error code = -104
-Token unknown - line 1, column 22
-||
SQL> select 'aaa' || true from rdb$database;
CONCATENATION
=============
aaaTRUE
(OK, expected; note that here order of boolean and string is changed comparing
with sample #1)
SQL> select 'aaa' || (true = true) from rdb$database;
Statement failed, SQLSTATE = 42000
Dynamic SQL Error
-SQL error code = -104
-Token unknown - line 1, column 23
-=
SQL> select 'aaa' || (true is true) from rdb$database;
Statement failed, SQLSTATE = 42000
Dynamic SQL Error
-SQL error code = -104
-Token unknown - line 1, column 23
-is
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