CreateQuery t_sparse_s3 (children 3) Identifier t_sparse_s3 Columns definition (children 1) ExpressionList (children 3) ColumnDeclaration id (children 1) DataType UInt32 ColumnDeclaration cond (children 1) DataType UInt8 ColumnDeclaration s (children 1) DataType String Storage definition (children 3) Function MergeTree Identifier id Set