Thread

Re: [BUGS] General Bug Report: prefix stringsearch doesn't return results

Michael Richards <miker@scifair.acadiau.ca> — 1999-06-10T03:36:33Z

On Fri, 28 May 1999, Oleg Bartunov wrote:

> On Fri, 28 May 1999, Unprivileged user wrote:
> 
> > Date: Fri, 28 May 1999 07:32:22 -0400 (EDT)
> > From: Unprivileged user <nobody@hub.org>
> > Reply-To: Josef Moser <jmoser@iicm.edu>
> > To: pgsql-bugs@postgreSQL.org
> > Subject: [BUGS] General Bug Report: prefix stringsearch doesn't return results
> > 
> > 
> > ============================================================================
> >                         POSTGRESQL BUG REPORT TEMPLATE
> > ============================================================================
> > 
> > 
> > Your name               : Josef Moser
> > Your email address      : jmoser@iicm.edu
> > 
> > Category                : runtime: back-end: SQL
> > Severity                : serious
> > 
> > Summary: prefix stringsearch doesn't return results
> > 
> > System Configuration
> > --------------------
> >   Operating System   : Linux 2.2.7 SUSE6.0; OSF1 V4.0 564 alpha
> > 
> >   PostgreSQL version : snapshot from: ftp.postgresql.org (May 28 03:06) and (May 26 03:06)
> > 
> >   Compiler used      : Linux: egcs-2.91.60 ; dec: cc (Digital UNIX Compiler Driver 3.11)
> > 
> > Hardware:
> > ---------
> > Pentium II (Deschutes), 512 MB Ram: Linux xfind 2.2.7 #4 SMP Tue May 4 14:21:58 MEST 1999 i686 unknown and
> > DEC ALPHA 248MB Ram : OSF1 www V4.0 564 alpha
> > 
> > Versions of other tools:
> > ------------------------
> > linux:GNU Make version 3.76.1, flex version 2.5.4
> > dec:GNU Make version 3.74 ,flex version 2.5.4
> > 
> > --------------------------------------------------------------------------
> > 
> > Problem Description:
> > --------------------
> > the command SELECT * FROM test_t WHERE word LIKE 'hello%';
> > returns no results even when there are some hellos in the 
> > database.
> > 
> > --------------------------------------------------------------------------
> > 
> > Test Case:
> > ----------
> > CREATE TABLE bug_t(word TEXT);
> > INSERT INTO bug_t VALUES('hello1');
> > INSERT INTO bug_t VALUES('hello2');
> > SELECT * FROM bug_t where word like 'hello%';
> > -- returns 0 results.....
> > SELECT * FROM bug_t where word like '%hello%';
> > -- returns 2 results
> > 
> 
> Hmm,
> 15:59[mira]:~/app/egcs/obj>psql test
> Welcome to the POSTGRESQL interactive sql monitor:
>   Please read the file COPYRIGHT for copyright terms of POSTGRESQL
> [PostgreSQL 6.5.0 on i586-pc-linux-gnulibc1, compiled by gcc egcs-2.91.66]
> 
>    type \? for help on slash commands
>    type \q to quit
>    type \g or terminate with semicolon to execute query
>  You are currently connected to the database: test
> 
> test=> CREATE TABLE bug_t(word TEXT);
> CREATE
> test=> INSERT INTO bug_t VALUES('hello1');
> INSERT 60937 1
> test=> INSERT INTO bug_t VALUES('hello2');
> INSERT 60938 1
> test=> SELECT * FROM bug_t where word like 'hello%';
> word
> ------
> hello1
> hello2
> (2 rows)
> test=> SELECT * FROM bug_t where word like '%hello%';
> word
> ------
> hello1
> hello2
> (2 rows)
> 
> No problem. This is Linux x86, 2.0.36, 6.5 current

Hmmmm....

psql 
Welcome to the POSTGRESQL interactive sql monitor:
  Please read the file COPYRIGHT for copyright terms of POSTGRESQL
[PostgreSQL 6.5.0 on i386-unknown-freebsd3.1, compiled by gcc 2.7.2.1]

   type \? for help on slash commands
   type \q to quit
   type \g or terminate with semicolon to execute query
 You are currently connected to the database: miker

miker=> CREATE TABLE bug_t(word TEXT);
CREATE
miker=> INSERT INTO bug_t VALUES('hello1');
INSERT 558121 1
miker=> INSERT INTO bug_t VALUES('hello2');
INSERT 558122 1
miker=> SELECT * FROM bug_t where word like 'hello%';
word
----
(0 rows)

miker=> SELECT * FROM bug_t where word like '%hello%';
word  
------
hello1
hello2
(2 rows)

miker=> SELECT * FROM bug_t where word like 'hello_';
word  
------
hello1
hello2
(2 rows)

-Michael