CreateQuery datetime64_index_tbl (children 3) Identifier datetime64_index_tbl Columns definition (children 1) ExpressionList (children 1) ColumnDeclaration ts (children 1) DataType DateTime64 (children 1) ExpressionList (children 2) Literal UInt64_3 Literal \'UTC\' Storage definition (children 2) Function MergeTree Identifier ts