SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Asterisk TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function s3 (children 1) ExpressionList (children 5) Literal \'http://localhost:11111/test/{a,b,c}.tsv\' Literal \'test\' Literal \'testtest\' Literal \'TSV\' Literal \'c1 UInt64, c2 UInt64, c3 UInt64\' ExpressionList (children 3) OrderByElement (children 1) Identifier c1 OrderByElement (children 1) Identifier c2 OrderByElement (children 1) Identifier c3