Skip to content
Snippets Groups Projects
Commit 77ba6108 authored by Tom Lane's avatar Tom Lane
Browse files

Revert "Use Foreign Key relationships to infer multi-column join selectivity".

This commit reverts 137805f8 as well as the associated commits 015e8894,
5306df28, and 68d704ed.  We found multiple bugs in this feature, and
there was concern about possible planner slowdown (though to be fair,
exhibiting a very large slowdown proved difficult).  The way forward
requires a considerable rewrite, which may or may not be possible to
accomplish in time for beta2.  In my judgment reviewing the rewrite will
be easier to accomplish starting from a clean slate, so let's temporarily
revert what's there now.  This also leaves us in a safe state if it turns
out to be necessary to postpone the rewrite to the next development cycle.

Discussion: <20160429102531.GA13701@huehner.biz>
parent 5c6d2a5e
Branches
Tags
No related merge requests found
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment