CFR: Problem with sys.jobs_log table on sys-export operation

[amotl]

Problem

On a CrateDB database instance up for two days or so, I received this error when running ctk cfr --debug sys-export.

polars.exceptions.ComputeError: could not append value: "line 1:25: mismatched input '-' expecting {<EOF>, ';'}" of type: str to the builder; make sure that all rows have the same schema or consider increasing `infer_schema_length`

Details

14:05:17        [cratedb_toolkit.util.cli            ] ERROR   : could not append value: "line 1:25: mismatched input '-' expecting {<EOF>, ';'}" of type: str to the builder; make sure that all rows have the same schema or consider increasing `infer_schema_length`

it might also be that a value overflows the data-type's capacity
Traceback (most recent call last):
  File "/path/to/cratedb-toolkit/cratedb_toolkit/cfr/cli.py", line 50, in sys_export
    path = stc.save()
           ^^^^^^^^^^
  File "/path/to/cratedb-toolkit/cratedb_toolkit/cfr/systable.py", line 149, in save
    df = self.read_table(tablename=tablename)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/cratedb-toolkit/cratedb_toolkit/cfr/systable.py", line 107, in read_table
    return pl.read_database(
           ^^^^^^^^^^^^^^^^^
  File "/path/to/polars/io/database/functions.py", line 267, in read_database
    ).to_polars(
      ^^^^^^^^^^
  File "/path/to/polars/io/database/_executor.py", line 462, in to_polars
    frame = frame_init(
            ^^^^^^^^^^^
  File "/path/to/polars/io/database/_executor.py", line 274, in _from_rows
    return frames if iter_batches else next(frames)  # type: ignore[arg-type]
                                       ^^^^^^^^^^^^
  File "/path/to/polars/io/database/_executor.py", line 261, in <genexpr>
    DataFrame(
  File "/path/to/polars/dataframe/frame.py", line 376, in __init__
    self._df = sequence_to_pydf(
               ^^^^^^^^^^^^^^^^^
  File "/path/to/polars/_utils/construction/dataframe.py", line 433, in sequence_to_pydf
    return _sequence_to_pydf_dispatcher(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/functools.py", line 909, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/polars/_utils/construction/dataframe.py", line 644, in _sequence_of_tuple_to_pydf
    return _sequence_of_sequence_to_pydf(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/polars/_utils/construction/dataframe.py", line 561, in _sequence_of_sequence_to_pydf
    pydf = PyDataFrame.from_rows(
           ^^^^^^^^^^^^^^^^^^^^^^
polars.exceptions.ComputeError: could not append value: "line 1:25: mismatched input '-' expecting {<EOF>, ';'}" of type: str to the builder; make sure that all rows have the same schema or consider increasing `infer_schema_length`