SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function replaceRegexpOne (children 1)
     ExpressionList (children 3)
      Identifier explain
      Literal \'^[ ]*(.*)\'
      Literal \'\\\\1\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function viewExplain (children 1)
              ExpressionList (children 3)
               Literal \'EXPLAIN\'
               Literal \'actions = 1\'
               Subquery (children 1)
                SelectWithUnionQuery (children 1)
                 ExpressionList (children 1)
                  SelectQuery (children 3)
                   ExpressionList (children 2)
                    Function plus (alias a1) (children 1)
                     ExpressionList (children 2)
                      Function intDiv (children 1)
                       ExpressionList (children 2)
                        Identifier a
                        Literal UInt64_2
                      Literal UInt64_1
                    Function intDiv (alias b1) (children 1)
                     ExpressionList (children 2)
                      Identifier b
                      Literal UInt64_3
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier t10
                   ExpressionList (children 3)
                    Identifier a1
                    Identifier b1
                    Function pi (children 1)
                     ExpressionList
   Function like (children 1)
    ExpressionList (children 2)
     Identifier explain
     Literal \'%Skip merging: %\'