Thread

Re: [BUGS] General Bug Report: regexp beginning of line doesn't work properly

Tatsuo Ishii <t-ishii@sra.co.jp> — 1999-02-04T00:57:49Z

Couldn't reproduce here.

FreeBSD 2.2.6-RELEASE
PostgreSQL 6.4.2
gcc 2.7.2.1
configure --with-mb=EUC_JP

>============================================================================
>                        POSTGRESQL BUG REPORT TEMPLATE
>============================================================================
>
>
>Your name		: Petr Hubeny
>Your email address	: psh@seznam.cz
>
>Category		: runtime: back-end
>Severity		: serious
>
>Summary: regexp beginning of line doesn't work properly
>
>System Configuration
>--------------------
>  Operating System   : Linux 2.2.1 ELF
>
>  PostgreSQL version : 6.4.2
>
>  Compiler used      : gcc 2.7.2.3
>
>Hardware:
>---------
>PII-300MHz, 64M RAM
>Linux agatha 2.2.1pcsp #6 (IZ(Bt $B(Bor 2 16:17:30 CET 1999 i686 unknown
>
>Versions of other tools:
>------------------------
>GNU Make version 3.76.1
>flex version 2.5.4
>GNU Bison version 1.25
>
>
>--------------------------------------------------------------------------
>
>Problem Description:
>--------------------
>"select...where a ~ '^A'" doesn't return anything,
>while "select...where a ~ '^[A]'" does. Also LIKE is
>affected.
>
>
>--------------------------------------------------------------------------
>
>Test Case:
>----------
>create table test (a text);
>insert into test values ('ABC');
>insert into test values ('DEF');
>select * from test where a ~ '^A'; -- NOTHING!!!, Query 1
>select * from test where a ~ '^[A]'; -- ABC, Query 2
>select * from test where a LIKE 'A%'; -- NOTHING
>select * from test where a LIKE '%A%'; -- ABC
>select * from test where a LIKE '%F'; -- DEF
>
>
>--------------------------------------------------------------------------
>
>Solution:
>---------
>Well, I suspect the parser and I tried to dig through
>the code, and this is how far I was able to get:
>
>with query 1 is function transformStmt()
>erroneously called with 
>
>((A_Expr*)((SelectStmt*)parseTree)->whereClause)->oper == 263
>
>with query 2 is
>
>((A_Expr*)((SelectStmt*)parseTree)->whereClause)->oper == 465
>
>Hope it helps,
>
>Psh
>
>--------------------------------------------------------------------------
>
>