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help / color / mirror / Atom feedFrom: Subramanian,Ramachandran <[email protected]>
To: [email protected] <[email protected]>
Cc: [email protected] <[email protected]>
Subject: AW: How to surround a selected value with double quotes?
Date: Mon, 22 Jun 2026 10:59:03 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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<[email protected]>
Hello,
thank you for your reply. I tried FORMAT(%I.%I,schema,tablename) and it works too. I have altered my script accordingly.
Now to the question why CONCAT and || , I am extremely new to Postgres and Linux .I am working on PG/Linux only since Last November. 😊 I come from 30 yrs of working on mainframes ( DB2 / IMS / REXX) and I tend to simply use what works in DB2 and fix only what does not work. The short answer is , lack of knowledge and experience.
Thank you so much for taking the time to reply to my question 😊
LG
Ram
Freundliche Grüße
i. A. Ramachandran Subramanian
Zentralbereich Informationstechnologie
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-----Ursprüngliche Nachricht-----
Von: [email protected] <[email protected]>
Gesendet: Montag, 22. Juni 2026 12:09
An: Subramanian,Ramachandran IT-md-db <[email protected]>
Cc: [email protected]
Betreff: Re: How to surround a selected value with double quotes?
On Mon, Jun 22, 2026 at 07:46:09AM +0000, Subramanian,Ramachandran wrote:
> #Build the SQL needed to get the list of tables that are approaching the SAFE_XID_GAP
> LIST_OLDEST_UNFROZEN_XID_SQL=" SELECT \
> cast (age(PGCL.relfrozenxid) as integer) as GAP, \
> INTB.table_catalog as DB_NAME, \
> "$PORT_NO" , \
> CONCAT('"',INTB.table_schema,'"') || '.' || \
> CONCAT('"',PGCL.relname,'"') as TABLE_NAME, \
> pg_table_size(PGCL.oid) as TABLE_SIZE \
*NEVER* concatenate identifiers. It will lead to bugs. Instead use
format() function (I find it MUCH simpler than quote_ident):
In your case, instead of the concat calls (why concat, if you can do ||, anyway?
select
format('%I.%I', INTB.table_schema, PGCL.relname) FROM …
depesz
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