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Able to Filter Engine When Scanning System Tables

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This commit is contained in:
jsc0218 2023-11-15 20:30:36 +00:00
parent 44830555da
commit 0d2acf9eec
1 changed files with 10 additions and 4 deletions
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14
src/Storages/System/StorageSystemTables.cpp
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@ -74,18 +74,24 @@ namespace
ColumnPtr getFilteredDatabases(const SelectQueryInfo & query_info, ContextPtr context)
{
MutableColumnPtr column = ColumnString::create();
MutableColumnPtr database_column = ColumnString::create();
MutableColumnPtr engine_column = ColumnString::create();
const auto databases = DatabaseCatalog::instance().getDatabases();
for (const auto & database_name : databases | boost::adaptors::map_keys)
for (const auto & [database_name, database] : databases)
{
if (database_name == DatabaseCatalog::TEMPORARY_DATABASE)
continue; /// We don't want to show the internal database for temporary tables in system.tables
column->insert(database_name);
database_column->insert(database_name);
engine_column->insert(database->getEngineName());
}
Block block { ColumnWithTypeAndName(std::move(column), std::make_shared<DataTypeString>(), "database") };
Block block
{
ColumnWithTypeAndName(std::move(database_column), std::make_shared<DataTypeString>(), "database"),
ColumnWithTypeAndName(std::move(engine_column), std::make_shared<DataTypeString>(), "engine")
};
VirtualColumnUtils::filterBlockWithQuery(query_info.query, block, context);
return block.getByPosition(0).column;
}