SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Identifier d32 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function generateRandom (children 1) ExpressionList (children 4) Literal \'d32 Date32\' Literal UInt64_1 Literal UInt64_10 Literal UInt64_10 Literal UInt64_10