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ITS#8299 fix page_merge cursor fixup

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The parent's mc_ki has changed. We need to fix that up as well
in other cursors.
This commit is contained in:
Howard Chu 2015-11-04 17:03:48 +00:00
parent caca4d8be6
commit c62b77b661
1 changed files with 5 additions and 3 deletions
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8
libraries/liblmdb/mdb.c
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@ -7794,6 +7794,7 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
/* Adjust other cursors pointing to mp */
MDB_cursor *m2, *m3;
MDB_dbi dbi = csrc->mc_dbi;
unsigned int top = csrc->mc_top;
for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
if (csrc->mc_flags & C_SUB)
@ -7802,9 +7803,10 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
m3 = m2;
if (m3 == csrc) continue;
if (m3->mc_snum < csrc->mc_snum) continue;
if (m3->mc_pg[csrc->mc_top] == psrc) {
m3->mc_pg[csrc->mc_top] = pdst;
m3->mc_ki[csrc->mc_top] += nkeys;
if (m3->mc_pg[top] == psrc) {
m3->mc_pg[top] = pdst;
m3->mc_ki[top] += nkeys;
m3->mc_ki[top-1] = cdst->mc_ki[top-1];
}
}
}