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Viewing changes to drizzled/plugin/storage_engine.cc

Fix issue where there are too many files in data directory. We now only
cache files with correct ext. AKA... we no longer keep all the filenames in
memory. The comparison operation will have us holding the lock on directory
a little longer (aka... whatever the OS is doing).

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Lines of Context:
drizzled/plugin/storage_engine.cc
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Registry<plugin::StorageEngine *> all_engines;
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static std::vector<plugin::StorageEngine *> vector_of_engines;
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static std::vector<plugin::StorageEngine *> vector_of_transactional_engines;
 
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static std::set<std::string> set_of_table_definition_ext;
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plugin::StorageEngine::StorageEngine(const string name_arg,
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                                     const bitset<HTON_BIT_SIZE> &flags_arg,
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  if (engine->check_flag(HTON_BIT_DOES_TRANSACTIONS))
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    vector_of_transactional_engines.push_back(engine);
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  if (engine->getTableDefinotionExt().length())
 
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  {
 
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    assert(engine->getTableDefinotionExt().length() == MAX_STORAGE_ENGINE_FILE_EXT);
 
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    set_of_table_definition_ext.insert(engine->getTableDefinotionExt());
 
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  }
 
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  return false;
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}
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  build_table_filename(tmp_path, sizeof(tmp_path), db.c_str(), "", false);
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  CachedDirectory directory(tmp_path);
 
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  CachedDirectory directory(tmp_path, set_of_table_definition_ext);
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  if (db.compare("information_schema"))
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  {