SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 1) ExpressionList (children 2) Function toUInt64 (alias key) (children 1) ExpressionList (children 1) Literal UInt64_1 Function dictGet (children 1) ExpressionList (children 3) Literal \'01785_db.simple_key_cache_dictionary\' Literal \'value\' Identifier key