AW: How to surround a selected value with double quotes? - Mailing list pgsql-novice
| From | Subramanian,Ramachandran |
|---|---|
| Subject | AW: How to surround a selected value with double quotes? |
| Date | |
| Msg-id | a62288386ffc42dd9003313e172fa03c@alte-leipziger.de Whole thread |
| In response to | Re: How to surround a selected value with double quotes? (Laurenz Albe <laurenz.albe@cybertec.at>) |
| List | pgsql-novice |
Thank you so much!!! Yes I ment bash script.
QUOTE_IDENT() worked like black magic!!
Postgres puts quotes for the names that need them and no quotes for those that do not need them 😊 😊
LG
Ram
11657 | data | 5432 | "7464128"."rel_7464128_m2m_story_relatedProjects_project"
| 8192
11655 | data | 5432 | "7464128"."rel_7464128_m2m_story_requiredStories_story"
| 0
11527 | data | 5432 |
catemplate_backup_version_250605_1756913256437."rel_1_m2m_companies_commercialContactPersons_persons" | 0
11527 | data | 5432 |
catemplate_backup_version_250908_1760965502453."rel_1_m2m_companies_commercialContactPersons_persons" | 0
Freundliche Grüße
i. A. Ramachandran Subramanian
Zentralbereich Informationstechnologie
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-----Ursprüngliche Nachricht-----
Von: Laurenz Albe <laurenz.albe@cybertec.at>
Gesendet: Montag, 22. Juni 2026 10:26
An: Subramanian,Ramachandran IT-md-db <ramachandran.subramanian@alte-leipziger.de>; pgsql-novice@lists.postgresql.org
Betreff: Re: How to surround a selected value with double quotes?
On Mon, 2026-06-22 at 07:46 +0000, Subramanian,Ramachandran wrote:
> I wrote a script to analyze and run vacuum on tables that need it.
I assume you are talking about a bash script.
> Sadly at the time I wrote the script, I never expected a schema name
> to be pure numbers.
>
> So my Script does not work now.
>
> I want to add double quote marks to each schema name and table name select.
> I tried using the CONCAT function, but it does not work as I expected it to.
>
> I would be grateful if someone can help me understand the mistake I am making with the CONCAT.
You are a victim of (self-inflicted) SQL injection.
Just surrounding the schema name with double quotes is not enough.
What if the schema name itself contains a double quote?
You should use PostgreSQL's functions to properly quote an identifier.
With a shell script, I think your only choice is to use SQL:
#!/bin/bash
schema='12345 43'
table='tab"567'
quoted_schema=$(psql -Atq -v var="$schema" <<EOF SELECT quote_ident(:'var'); EOF
)
quoted_table=$(psql -Atq -v var="$table" <<EOF SELECT quote_ident(:'var'); EOF
)
sql="SELECT col FROM $quoted_schema.$quoted_table"
Yours,
Laurenz Albe
pgsql-novice by date: