| From: | hieppso194(at)gmail(dot)com |
|---|---|
| To: | pgsql-bugs(at)postgresql(dot)org |
| Subject: | BUG #14696: true cardinality estimation |
| Date: | 2017-06-09 12:56:43 |
| Message-ID: | 20170609125643.26502.31641@wrigleys.postgresql.org |
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| Thread: | |
| Lists: | pgsql-bugs |
The following bug has been logged on the website:
Bug reference: 14696
Logged by: Hiep Pham
Email address: hieppso194(at)gmail(dot)com
PostgreSQL version: 10beta1
Operating system: Ubuntu 16.04
Description:
I am trying injecting true cardinality to Postgresql optimizer. To do that,
i calculate the return rows and total rows; then divide the first for the
second one. When use Load extension, postgreSQL throws the error:
pg_true_cardinality_extension.so: undefined symbol: PGfinish
Although, i included libpq to my source file and can make it to so file. But
when load to Postgresql, it can't link to libpq.
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