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Commit55d015b

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Add _bt_binsrch() scantid assertion to nbtree.
Assert that _bt_binsrch() binary searches with scantid set in insertionscankey cannot be performed on leaf pages. Leaf-level binary searcheswhere scantid is set must use _bt_binsrch_insert() instead._bt_binsrch_insert() is likely to have additional responsibilities inthe future, such as searching within GIN-style posting lists usingscantid. It seems like a good idea to tighten things up now.
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‎src/backend/access/nbtree/nbtsearch.c

Lines changed: 5 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -347,12 +347,14 @@ _bt_binsrch(Relation rel,
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int32result,
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cmpval;
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350-
/* Requesting nextkey semantics while using scantid seems nonsensical */
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Assert(!key->nextkey||key->scantid==NULL);
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page=BufferGetPage(buf);
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opaque= (BTPageOpaque)PageGetSpecialPointer(page);
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353+
/* Requesting nextkey semantics while using scantid seems nonsensical */
354+
Assert(!key->nextkey||key->scantid==NULL);
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/* scantid-set callers must use _bt_binsrch_insert() on leaf pages */
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Assert(!P_ISLEAF(opaque)||key->scantid==NULL);
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low=P_FIRSTDATAKEY(opaque);
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high=PageGetMaxOffsetNumber(page);
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