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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
contrib/hstore/hstore_io.c
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@ -322,6 +322,11 @@ hstoreUniquePairs(Pairs *a, int32 l, int32 *buflen)
}
qsort((void *) a, l, sizeof(Pairs), comparePairs);
/*
* We can't use qunique here because we have some clean-up code to run on
* removed elements.
*/
ptr = a + 1;
res = a;
while (ptr - a < l)