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 intDiv (alias a1) (children 1)
                     ExpressionList (children 2)
                      Identifier a
                      Literal UInt64_3
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier t9
                   ExpressionList (children 1)
                    Identifier a1
   Function like (children 1)
    ExpressionList (children 2)
     Identifier explain
     Literal \'%Skip merging: %\'