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Add reusable routine for making arrays unique.

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Introduce qunique() and qunique_arg(), which can be used after qsort()
and qsort_arg() respectively to remove duplicate values.  Use it where
appropriate.

Author: Thomas Munro
Reviewed-by: Tom Lane (in an earlier version)
Discussion: https://postgr.es/m/CAEepm%3D2vmFTNpAmwbGGD2WaryM6T3hSDVKQPfUwjdD_5XY6vAA%40mail.gmail.com
This commit is contained in:
Thomas Munro
2019-11-07 16:51:04 +13:00
parent 3feb6ace7c
commit 7815e7efdb
13 changed files with 115 additions and 208 deletions
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5
src/backend/utils/adt/tsvector.c
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@ -41,8 +41,9 @@ compareWordEntryPos(const void *a, const void *b)
}
/*
* Removes duplicate pos entries. If there's two entries with same pos
* but different weight, the higher weight is retained.
* Removes duplicate pos entries. If there's two entries with same pos but
* different weight, the higher weight is retained, so we can't use
* qunique here.
*
* Returns new length.
*/