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Expose the table properties to application

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Summary: Provide a public API for users to access the table properties for each SSTable.

Test Plan: Added a unit tests to test the function correctness under differnet conditions.

Reviewers: haobo, dhruba, sdong

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D16083
This commit is contained in:
kailiu
2014-02-13 16:28:21 -08:00
parent b2e7ee8b41
commit 63690625cd
12 changed files with 272 additions and 65 deletions
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26
db/table_cache.cc
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@@ -163,6 +163,32 @@ Status TableCache::Get(const ReadOptions& options,
}
return s;
}
Status TableCache::GetTableProperties(
const EnvOptions& toptions,
const InternalKeyComparator& internal_comparator,
const FileMetaData& file_meta,
std::shared_ptr<const TableProperties>* properties, bool no_io) {
Status s;
auto table_handle = file_meta.table_reader_handle;
// table already been pre-loaded?
if (table_handle) {
auto table = GetTableReaderFromHandle(table_handle);
*properties = table->GetTableProperties();
return s;
}
bool table_io;
s = FindTable(toptions, internal_comparator, file_meta.number,
file_meta.file_size, &table_handle, &table_io, no_io);
if (!s.ok()) {
return s;
}
assert(table_handle);
auto table = GetTableReaderFromHandle(table_handle);
*properties = table->GetTableProperties();
ReleaseHandle(table_handle);
return s;
}
bool TableCache::PrefixMayMatch(const ReadOptions& options,
const InternalKeyComparator& icomparator,