[IMPALA-10012] ds_hll_sketch() results ascii codec decoding error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Component/s: Backend
• Epic Color: ghx-label-2
• Assignee: Adam Tamas
• Reporter: Gabor Kaszab
• Created: 28/Jul/20 13:04
• Updated: 17/Nov/20 11:18
• Resolved: 17/Nov/20 11:18

Description

select ds_hll_sketch(l_orderkey) from tpch_parquet.lineitem;

Unknown Exception : 'ascii' codec can't decode byte 0x86 in position 20: ordinal not in range(128)
Traceback (most recent call last):
  File "/home/gaborkaszab/shadow/Impala-upstream/shell/impala_shell.py", line 1183, in _execute_stmt
    for rows in rows_fetched:
  File "/home/gaborkaszab/shadow/Impala-upstream/shell/impala_client.py", line 1098, in fetch
    yield [row.split('\t') for row in result.data]
UnicodeDecodeError: 'ascii' codec can't decode byte 0x86 in position 20: ordinal not in range(128)
[Not connected] >

Even though there is no point of calling ds_hll_sketch() on its own, we should still make this foolproof and prevent Impala from crashing.

Issue Links

• Is contained by: IMPALA-9593 Implement count(distinct) function (DataSketches/HLL)