CreateQuery t0 (children 3)
 Identifier t0
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration json (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType JSON
 Storage definition (children 3)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
  Set
