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I have installed Postgres 9.5 in an attempt to install GitLab. As part of the process the trigram extension (pg_trgm) needs to be created on the database. When I issue the create statement I get the following error:

ERROR: could not open extension control file "/usr/share/postgresql/9.1/extension/pg_trgm.control": No such file or directory

Presumably there was a version of Postgres 9.1 on the server previously and the extension control file is currently found at /usr/share/postgresql/9.5/extension/pg_trgm.control. How do I get the psql instance to see the extension in the 9.5 directory?

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  • Have you checked if your postgres config(s) might still be pointing to the 9.1 directory? Did you also check what version of PG is in fact running currently? Apr 24, 2017 at 17:03
  • The error was having some 9.1 and 9.3 packages still installed. I had tried removing the packages but apparently not gotten all of them. I don't know if this qualifies as an answer-worthy response.
    – FluxIX
    Apr 28, 2017 at 2:40
  • This error can also occur if you're missing the postgresql-contrib package on ubuntu/debian.
    – amdfan
    Jun 8, 2017 at 7:15

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