SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Identifier tag1 (alias part_name)
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 2)
           Identifier tag1
           Function sum (alias is_covered) (children 1)
            ExpressionList (children 1)
             Identifier is_covered
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 3)
                 ExpressionList (children 3)
                  Identifier tag1
                  Identifier tag2
                  Function isMergeTreePartCoveredBy (alias is_covered) (children 1)
                   ExpressionList (children 2)
                    Identifier tag1
                    Identifier tag2
                 TablesInSelectQuery (children 3)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    TableIdentifier mt
                  TablesInSelectQueryElement (children 1)
                   ArrayJoin (children 1)
                    ExpressionList (children 1)
                     Identifier names (alias tag1)
                  TablesInSelectQueryElement (children 1)
                   ArrayJoin (children 1)
                    ExpressionList (children 1)
                     Identifier names (alias tag2)
                 Function notEquals (children 1)
                  ExpressionList (children 2)
                   Identifier tag1
                   Identifier tag2
          ExpressionList (children 1)
           Identifier tag1
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier is_covered
     Literal UInt64_0
   ExpressionList (children 2)
    OrderByElement (children 1)
     Function tupleElement (children 1)
      ExpressionList (children 2)
       Function mergeTreePartInfo (children 1)
        ExpressionList (children 1)
         Identifier part_name
       Literal \'partition_id\'
    OrderByElement (children 1)
     Function tupleElement (children 1)
      ExpressionList (children 2)
       Function mergeTreePartInfo (children 1)
        ExpressionList (children 1)
         Identifier part_name
       Literal \'min_block\'
