[IMPALA-12990] impala-shell broken if Iceberg delete deletes 0 rows

• Type: Bug
• Status: In Progress
• Priority: Major
• Resolution: Unresolved
• Component/s: Clients
• Labels: iceberg
• Epic Color: ghx-label-14
• Assignee: Csaba Ringhofer
• Reporter: Csaba Ringhofer
• Created: 10/Apr/24 13:40
• Updated: 22/Apr/24 14:21

Description

Happens only with Python 3

impala-python3 shell/impala_shell.py

create table icebergupdatet (i int, s string) stored as iceberg;
alter table icebergupdatet set tblproperties("format-version"="2");
delete from icebergupdatet where i=0;
Unknown Exception : '>' not supported between instances of 'NoneType' and 'int'
Traceback (most recent call last):
  File "shell/impala_shell.py", line 1428, in _execute_stmt
    if is_dml and num_rows == 0 and num_deleted_rows > 0:
TypeError: '>' not supported between instances of 'NoneType' and 'int'

The same erros should also happen when the delete removes > 0 rows, but the impala server has an older version that doesn't set TDmlResult.rows_deleted

Issue Links

• is related to: IMPALA-12978 IMPALA-12544 made impala-shell incompatible with old impala servers