R: Special index for "like"-based query

[Job <Job@xxxxxxxxxxxxxxxxxxxx>]

I tried to create a GIST/GIN index on a timestamp without time zone field but it does not work.

Are there alternatives index types or timezone could speed query up?

Thank you

/F

 

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Da: pgsql-general-owner@xxxxxxxxxxxxxx [pgsql-general-owner@xxxxxxxxxxxxxx] per conto di Job [Job@xxxxxxxxxxxxxxxxxxxx]
Inviato: venerdì 30 dicembre 2016 10.55
A: David G. Johnston
Cc: pgsql-general@xxxxxxxxxxxxxx
Oggetto: R: [GENERAL] Special index for "like"-based query

>>GIST​

>>https://www.postgresql.org/docs/9.6/static/pgtrgm.html

>>​https://www.postgresql.org/docs/9.6/static/btree-gist.html

 

I tried with a GIST-like index and queries improves a lot, thank you!

 

Furthermore, this type of index is also suitable for a timestamp query, where we can mix date and time parameters?

Thank you again!
/F

 

 

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Da: David G. Johnston [david.g.johnston@xxxxxxxxx]
Inviato: venerdì 30 dicembre 2016 0.33
A: Job
Cc: pgsql-general@xxxxxxxxxxxxxx
Oggetto: Re: [GENERAL] Special index for "like"-based query

On Thu, Dec 29, 2016 at 4:21 PM, Job <Job@xxxxxxxxxxxxxxxxxxxx> wrote:

Hello,

in Postgresql 9.6 we have a query running on a very large table based, in some cases, on a like statement:

... WHERE FIELD='CODE' OR FIELD LIKE 'CODE_%'

Which type of index can i create to speed to the search when the "like" case happens?

​GIST​

https://www.postgresql.org/docs/9.6/static/pgtrgm.html

​https://www.postgresql.org/docs/9.6/static/btree-gist.html

​

David J.