CreateQuery test_table (children 3)
 Identifier test_table
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType UInt32
   ColumnDeclaration value (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType UInt32
   ColumnDeclaration value_arr (children 1)
    DataType Variant (children 1)
     ExpressionList (children 2)
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType UInt32
      DataType Nothing
 Storage definition (children 2)
  Function CoalescingMergeTree (children 1)
   ExpressionList
  Identifier key
