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Code Issues

Fix #8290: 'Unique scan' is incorrectly reported in the explained plan for unique index and IS NULL predicate

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This commit is contained in:
Dmitry Yemanov 2024-10-24 12:43:01 +03:00
parent 5293f232e6
commit eb44a7ecdb
1 changed files with 8 additions and 1 deletions
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9
src/jrd/recsrc/RecordSource.cpp
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@ -150,6 +150,7 @@ void RecordSource::printInversion(thread_db* tdbb, const InversionNode* inversio
plan += "Bitmap" + printIndent(++level);
const index_desc& idx = retrieval->irb_desc;
const bool primaryIdx = (idx.idx_flags & idx_primary);
const bool uniqueIdx = (idx.idx_flags & idx_unique);
const USHORT segCount = idx.idx_count;
@ -161,7 +162,13 @@ void RecordSource::printInversion(thread_db* tdbb, const InversionNode* inversio
const bool fullscan = (maxSegs == 0);
const bool list = (retrieval->irb_list != nullptr);
const bool unique = !list && uniqueIdx && equality && (minSegs == segCount);
bool unique = false;
if (!list && equality && minSegs == segCount)
{
unique = (retrieval->irb_generic & irb_ignore_null_value_key) ?
uniqueIdx : primaryIdx;
}
string bounds;
if (!unique && !fullscan)