CreateQuery subcolumns (children 3)
 Identifier subcolumns
 Columns definition (children 1)
  ExpressionList (children 5)
   ColumnDeclaration t (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 3)
      NameTypePair a (children 1)
       DataType Array (children 1)
        ExpressionList (children 1)
         DataType Nullable (children 1)
          ExpressionList (children 1)
           DataType UInt32
      NameTypePair u (children 1)
       DataType UInt32
      NameTypePair s (children 1)
       DataType Nullable (children 1)
        ExpressionList (children 1)
         DataType String
   ColumnDeclaration arr (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType String
   ColumnDeclaration arr2 (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType Nullable (children 1)
         ExpressionList (children 1)
          DataType String
   ColumnDeclaration lc (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration nested (children 1)
    DataType Nested (children 1)
     ExpressionList (children 2)
      NameTypePair col1 (children 1)
       DataType String
      NameTypePair col2 (children 1)
       DataType Nullable (children 1)
        ExpressionList (children 1)
         DataType UInt32
 Storage definition (children 3)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
  Set