CreateQuery type_json_src (children 3)
 Identifier type_json_src
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration data (children 1)
    DataType JSON
 Storage definition (children 2)
  Function MergeTree
  Identifier id
