Suggestion to improve query performance of data validation in proc.

You should read through the and the contained linked FAQ - note especially
the concept and recommendation for “cross-posting”.

https://wiki.postgresql.org/wiki/Mailing_Lists#Email_etiquette_mechanics

On Thursday, May 21, 2020, postgann2020 s <postgann2020@gmail.com> wrote:

We have multiple long procs that are having 100s of data validations and
currently we have written as below.

***********

if (SELECT 1 FROM SCHEMA.TABLE WHERE column=data AND column=data) then
statements
etc..

***********

Are there any other ways to validate the data, which will help us to
improve the performance of the query?

I have no idea what your are trying to get at here. You should try
providing SQL that actually runs. Though at first glance it seems quite
probable your are doing useless work anyway.

David J.

Hi David,

Thanks for your feedback.

We are using the below kind of validation throughout the proc in multiple
locations and for validation we are using the below statements.

--check Data available or not for structure_id1
IF EXISTS(SELECT 1 FROM schema.table_name WHERE
column1=structure_id1) THEN
is_exists1 :=true;
END IF;

We are looking for a better query than "*SELECT 1 FROM schema.table_name
WHERE column1=structure_id1*" this query for data validation.

Please suggest is there any other ways to validate this kind of queries
which will improve the overall performance.

Regards,
Postgann.

On Fri, May 22, 2020 at 12:36 PM David G. Johnston <
david.g.johnston@gmail.com> wrote:

On Friday, May 22, 2020, postgann2020 s <postgann2020@gmail.com> wrote:

We are looking for a better query than "*SELECT 1 FROM schema.table_name
WHERE column1=structure_id1*" this query for data validation.

There is no more simple a query that involve records on a single,table.

Please suggest is there any other ways to validate this kind of queries

which will improve the overall performance.

Abandon procedural logic and embrace the declarative set oriented nature of
SQL.

David J.

On Fri, May 22, 2020 at 2:09 AM David G. Johnston <
david.g.johnston@gmail.com> wrote:

On Friday, May 22, 2020, postgann2020 s <postgann2020@gmail.com> wrote:

We are looking for a better query than "*SELECT 1 FROM
schema.table_name WHERE column1=structure_id1*" this query for data
validation.

If many rows match potentially, then wrapping the query with select
exists(old_query) would allow the execution to bail asap.