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avoid calling FindFile twice in TwoLevelIterator for PlainTable

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Summary:
this is to reclaim the regression introduced in
https://reviews.facebook.net/D17853

Test Plan: make all check

Reviewers: igor, haobo, sdong, dhruba, yhchiang

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D17985
This commit is contained in:
Lei Jin
2014-04-25 12:23:07 -07:00
parent d642c60bdc
commit ccaca59bee
9 changed files with 23 additions and 58 deletions
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18
table/two_level_iterator.cc
View File

@@ -77,16 +77,18 @@ TwoLevelIterator::TwoLevelIterator(TwoLevelIteratorState* state,
: state_(state), first_level_iter_(first_level_iter) {}
void TwoLevelIterator::Seek(const Slice& target) {
if (state_->prefix_enabled && !state_->PrefixMayMatch(target)) {
if (state_->check_prefix_may_match &&
!state_->PrefixMayMatch(target)) {
SetSecondLevelIterator(nullptr);
} else {
first_level_iter_.Seek(target);
InitDataBlock();
if (second_level_iter_.iter() != nullptr) {
second_level_iter_.Seek(target);
}
SkipEmptyDataBlocksForward();
return;
}
first_level_iter_.Seek(target);
InitDataBlock();
if (second_level_iter_.iter() != nullptr) {
second_level_iter_.Seek(target);
}
SkipEmptyDataBlocksForward();
}
void TwoLevelIterator::SeekToFirst() {