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 1)
                    Function plus (alias a1) (children 1)
                     ExpressionList (children 2)
                      Function intDiv (children 1)
                       ExpressionList (children 2)
                        Identifier a
                        Literal UInt64_2
                      Literal UInt64_1
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier t8
                   ExpressionList (children 1)
                    Identifier a1
   Function like (children 1)
    ExpressionList (children 2)
     Identifier explain
     Literal \'%Skip merging: %\'