| From: | Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com> |
|---|---|
| To: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | [PATCH] fix GIN index search sometimes losing results |
| Date: | 2020-05-07 13:26:17 |
| Message-ID: | CALT9ZEE-aLotzBg-pOp2GFTesGWVYzXA3=mZKzRDa_OKnLF7Mg@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi, all
It appeared than GIN index sometimes lose results if simultaneously:
1 if query operand contains weight marks
2 if weight-marked operand is negated by ! operator
3 if there are only logical (not phrase) operators from this negation
towards the root of query tree.
e.g. '!crew:A'::tsquery refuse to find 'crew:BCD'::tsvector
Seems it is in all versions of PG.
The patch is intended to deal with the issue. Also it contains tests for
these rare condition.
Pavel Borisov.
| Attachment | Content-Type | Size |
|---|---|---|
| gin-weights-patch-v3.diff | application/octet-stream | 2.1 KB |
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