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btree_gist: Fix memory allocation formula
2025年12月18日 02:01:43 +0000 (11:01 +0900)
2025年12月18日 02:01:43 +0000 (11:01 +0900)
This change has been suggested by the two authors listed in this commit,
both of them providing an incomplete solution (David's formula relied on
a "bytea *", while Bertrand's did not use palloc_array()). The solution
provided in this commit uses GBT_VARKEY instead of the inconsistent
bytea for the allocation size, with a palloc_array().

The change related to Vsrt is one I am flipping to a more consistent
style, in passing.

Author: David Geier <geidav.pg@gmail.com>
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/ad0748d4-3080-436e-b0bc-ac8f86a3466a@gmail.com
Discussion: https://postgr.es/m/aTrG3Fi4APtfiCvQ@ip-10-97-1-34.eu-west-3.compute.internal


diff --git a/contrib/btree_gist/btree_utils_var.c b/contrib/btree_gist/btree_utils_var.c
index 7fbea0cfb7bfd38ddc302728cbcd8bf6f9696c1e..40e06ae4908288f5886635340b17c0e2b3f96172 100644 (file)
--- a/contrib/btree_gist/btree_utils_var.c
+++ b/contrib/btree_gist/btree_utils_var.c
@@ -467,7 +467,7 @@ gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
GBT_VARKEY **sv = NULL;
gbt_vsrt_arg varg;
- arr = (Vsrt *) palloc((maxoff + 1) * sizeof(Vsrt));
+ arr = palloc_array(Vsrt, maxoff + 1);
nbytes = (maxoff + 2) * sizeof(OffsetNumber);
v->spl_left = (OffsetNumber *) palloc(nbytes);
v->spl_right = (OffsetNumber *) palloc(nbytes);
@@ -476,7 +476,7 @@ gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
v->spl_nleft = 0;
v->spl_nright = 0;
- sv = palloc(sizeof(bytea *) * (maxoff + 1));
+ sv = palloc_array(GBT_VARKEY *, maxoff + 1);
/* Sort entries */
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