SelectWithUnionQuery (children 2) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Function throwIf (children 1) ExpressionList (children 1) Function notEquals (children 1) ExpressionList (children 2) Function count (children 1) ExpressionList Literal UInt64_4 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function remote (children 1) ExpressionList (children 3) Literal \'127.0.0.{1,2}\' Function currentDatabase (children 1) ExpressionList Identifier t3 ExpressionList (children 1) Identifier a Identifier Null