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English speaking PostgreSQL public chat. This group is for discussions on PostgreSQL-related topics and strives to provide best-effort support as well.

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What is the best channel on YouTube to watch advance topics

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There might be other issues of course - anything that corrupts data in the OS or hardware could also corrupt an index.

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Perhaps you have upgraded the version of glibc(?) and that changed the sorting weights so that indexes are invalid? If so it is necessary to immediately reindex or else things like that can happen.

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(row or column-level filtering may require specific versions)

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You can of course make a physical replica and create a logical replica from it. Synchronisation of switching from that replica to the primary might be tricky but perhaps something could be done with slots if they exist that far back.

In my experience your best bet is to remove or exclude indexes from the structural backup and add any necessary after the initial replica is created. Importing large tables with many resulting index updates can be very slow vs. just creating the index after.

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Hi I am looking for a course please let me know if any one

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Ah! The wording input! ;-)

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Hi all, I wrote an article about searching on multiple columns in Postgres. It is written step-by-step from a very easy scenario all the way to a final complex one. I tried to write it from bottom up, that is, to explain every step, function and possibility of some not-so-obvious results. Feedback welcome :-D Enjoy!

https://aboutbits.it/blog/2025-08-27-multicolumn-search-in-postgres

ps. Thx @NickBluth for your valuable input.

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Those are my questions.... These are the ways we can add constraints + partitioning using pg_partman.

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Which part's link you want?

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"What is similarity? A bag of arbitrary distances..." 🧛‍♂️

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Thanks, I will think about your suggestion

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Hi all, I am currently writing an article, and I am wondering if the following explanation (in not too complicated/detailed words) is correct. I want to explain this SQL:

create extension pg_trgm;
create index person_name_idx on person using gin(name gin_trgm_ops);


... with these words:

> First, we must install the extension and create a GIN index using the gin(name gin_trgm_ops) indexing method. The GIN operator class gin_trgm_ops tells PostgreSQL to use the trigram operator class from pg_trgm, so the index knows how to break name into trigrams and which operators it should support. It maps operators, as for instance like or % (similarity operator) to the GIN index.

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Hi Folks, with the f**** happening over at bitnami, anyone aware If there are plans to provide Helmcharts for PostgreSQL *from* PostgreSQL??

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Ssd vs. spinning rust? 🤔

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Index is currently being used and is not invalid. If I insert the duplicate record it will not allow.

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Fixing it can be tricky, because you may need to target the invalid data without using an index. There are debug settings you can use to prevent e.g. index scans being used. https://www.postgresql.org/docs/15/runtime-config-query.html#RUNTIME-CONFIG-QUERY-ENABLE

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I found that postgres is having some problem with the primary key as it violate sometimes and duplicate records are created in the table. Has anyone else observed the same. I am using postgres 15.7. Is there any solution to this problem pls let me know.

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PostgreSQL

You could also exclude some data, possibly, if you don't need a complete replica for your purposes. Maybe some tables (or columns/rows within them) are unnecessary, merely containing transient data of temporary use.

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Question regard logical replication in version 10-13:
is it possible to set up the replication from pg_basebackup instead of waiting for the CREATE SUBSCRIPTION to start sync initial data?
what are my options to make the replica be ready as fast as possible?

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Hi All ,

I am looking for Postgresql 17 pre and post installation standards on windows. Can any one share ref docs please..

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You're welcome, albeit I don't remember giving input ;-)

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But as you have asked, here it is. Check the 1st section


https://github.com/pgpartman/pg_partman/blob/development/doc/pg_partman_howto.md#simple-time-based-1-partition-per-day

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Well, both, if you ask :)

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Mind adding a link to where in the docs you read about this?

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Hi all,

I'm reading pg_partman's document to understand the difference between below 2 cases but I'm unable to get it. Could someone please help me to understand it.
I know that template table is used as some of the properties of parent table don't get propagated to the child table by default.

1. Adding the partition key column in primary/unique constraint during table creation.

Vs

2. Creating a partition table without a primary/unique constraint.
Then create a template table.
Add primary/unique constraint to the template table.

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Sounds reasonable. Or revert the order to something like
"To teach a GIN index to break name into trigrams and to map operators like like or % (similarity operator) to use those trigrams, we must first install the extension and create the index like this: [...]"

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Hi i am Giving postgresql DBA offline interview suport in Hyderabad, call:8309555894

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Does anyone had recently issues with libpq5 on rhel systems? In my case rhel 9 with PostgreSQL 16. I found and old mail thread from 2021 with the same issue but I haven't enough working brain cells left for today to debug it further 🙈

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hello all, almost same servers, same write read statiticts of disk, almost same tables, index, size etc but one of doing datafileread with 500mb/s the other 50mb/s, what I am missing?

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