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Remove an assertion for single-delete in MergeHelper::MergeUntil

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Summary:
Previously we have an assertion which triggers when we issue Merges
after a single delete.  However, merges after a single delete are
unrelated to that single delete.  Thus this behavior should be
allowed.

This will address a flakyness of db_stress.

Test Plan: db_stress

Reviewers: IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D64923
This commit is contained in:
Yueh-Hsuan Chiang 2016-10-13 14:26:57 -07:00
parent 8cbe3e10ca
commit 040328a30d
1 changed files with 1 additions and 10 deletions
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11
db/merge_helper.cc
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@ -128,17 +128,8 @@ Status MergeHelper::MergeUntil(InternalIterator* iter,
assert(IsValueType(ikey.type));
if (ikey.type != kTypeMerge) {
if (ikey.type != kTypeValue && ikey.type != kTypeDeletion) {
// Merges operands can only be used with puts and deletions, single
// deletions are not supported.
assert(false);
// release build doesn't have asserts, so we return error status
return Status::InvalidArgument(
" Merges operands can only be used with puts and deletions, single "
"deletions are not supported.");
}
// hit a put/delete
// hit a put/delete/single delete
// => merge the put value or a nullptr with operands_
// => store result in operands_.back() (and update keys_.back())
// => change the entry type to kTypeValue for keys_.back()