Error when run query from SQL Lab using json_agg/json_build_object

A clear and concise description of what the bug is. I need to run some query using json_agg/json_build_object in Postgres database, but I got an error pyarrow.lib.ArrowNotImplementedError: Not implemented type for list in DataFrameBlock: struct<table_name: string, database_id: int64>

My query:

SELECT id, json_agg(json_build_object(‘table_name’,table_name,‘database_id’,database_id)) FROM (SELECT * FROM tables) AS tables GROUP BY id

Error details:

ERROR:superset.sql_lab:Query 11: Not implemented type for list in DataFrameBlock: struct<table_name: string, database_id: int64> Traceback (most recent call last): File “/app/superset/sql_lab.py”, line 170, in get_sql_results log_params=log_params, File “/app/superset/sql_lab.py”, line 391, in execute_sql_statements expand_data, File “/app/superset/sql_lab.py”, line 291, in _serialize_and_expand_data df = result_set.to_pandas_df() File “/app/superset/result_set.py”, line 152, in to_pandas_df return self.convert_table_to_df(self.table) File “/app/superset/result_set.py”, line 129, in convert_table_to_df return table.to_pandas(integer_object_nulls=True) File “pyarrow/array.pxi”, line 468, in pyarrow.lib._PandasConvertible.to_pandas File “pyarrow/table.pxi”, line 1238, in pyarrow.lib.Table._to_pandas File “/usr/local/lib/python3.6/site-packages/pyarrow/pandas_compat.py”, line 704, in table_to_blockmanager blocks = _table_to_blocks(options, table, categories) File “/usr/local/lib/python3.6/site-packages/pyarrow/pandas_compat.py”, line 976, in _table_to_blocks result = pa.lib.table_to_blocks(options, block_table, categories) File “pyarrow/table.pxi”, line 780, in pyarrow.lib.table_to_blocks File “pyarrow/error.pxi”, line 86, in pyarrow.lib.check_status pyarrow.lib.ArrowNotImplementedError: Not implemented type for list in DataFrameBlock: struct<table_name: string, database_id: int64>

Screenshots

Environment

(please complete the following information):

• superset version: master branch
• python version: 3.6.9
• node.js version: 10
• npm version: 6.13.4

[graceguo-supercat]

@lxhoang97 #9007 fixed an issue for a nested type ARRAY<MAP<STRING,STRING>>. Do you want to test it in your environment. thanks!

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