Date: Wed, 5 Jul 2023 23:25:59 +0200 (CEST)
From: Erik Wienhold <ewie@ewie.name>
To: M Sarwar <sarwarmd02@outlook.com>,
	"pgsql-admin@lists.postgresql.org" <pgsql-admin@lists.postgresql.org>
Message-ID: <1539000886.854641.1688592359041@office.mailbox.org>
In-Reply-To: 
 <DM4PR19MB597845608FD03283CC6EEB1DD32FA@DM4PR19MB5978.namprd19.prod.outlook.com>
References: 
 <PH2P110MB0922161A06BF0F0AF502C420FF2FA@PH2P110MB0922.NAMP110.PROD.OUTLOOK.COM>
 <DM4PR19MB59789AC5B76EA5829DF176E9D32FA@DM4PR19MB5978.namprd19.prod.outlook.com>
 <DM4PR19MB597845608FD03283CC6EEB1DD32FA@DM4PR19MB5978.namprd19.prod.outlook.com>
Subject: Re: SQL is fetching results BLANK checks but the data has no BLANKS
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Importance: Normal
Archived-At: 
 <https://www.postgresql.org/message-id/1539000886.854641.1688592359041%40office.mailbox.org>
Precedence: bulk

> On 05/07/2023 23:10 CEST M Sarwar <sarwarmd02@outlook.com> wrote:
>
> Data in the database is uploaded using python.
>
> I have tried to test the same results by creating a sample table where I
> inserted some sample data. In my sample test, I do not see any discrepanc=
ies.
>
> ------------------------------
> From: M Sarwar <sarwarmd02@outlook.com>
>  Sent: Wednesday, July 5, 2023 5:01 PM
>  To: pgsql-admin@lists.postgresql.org <pgsql-admin@lists.postgresql.org>
>  Subject: SQL is fetching results BLANK checks but the data has no BLANKS
>
> SELECT TEST_NUMBER
>  FROM BRONX.TEST_TEST_DETAILS_ALL_MCM
>  WHERE LEFT(TEST_DESCRIPTION, 1) =3D ' '
> ;
> The above SQL is fetching lot of data but when I take closer look at the =
data
> in the table TEST_TEST_DETAILS_ALL_MCM, I see no prefixed BLANKS in the c=
olumn
> TEST_DESCRIPTION.
>
> test_description character varying(50) COLLATE pg_catalog."default", -- T=
EST_DESCRIPTION, type
>
> What could be the reason here for fetching the data when I do not have th=
e
> data which has prefixes of BLANK , =E2=80=98 =E2=80=98.

Is there a functional index on left(test_description, 1) ?  My guess is tha=
t
the index is corrupted.  This can be fixed with REINDEX.

--
Erik