Khurram Faraaz created DRILL-5947:
-------------------------------------
Summary: COUNT(<column-name>) on empty JSON results in schema
change error
Key: DRILL-5947
URL: https://issues.apache.org/jira/browse/DRILL-5947
Project: Apache Drill
Issue Type: Bug
Components: Execution - Flow
Affects Versions: 1.11.0
Reporter: Khurram Faraaz
Count over a field, from a non-empty and another empty JSON file results in
schema change error, "Streaming aggregate does not support schema changes"
{noformat}
OpenJDK 64-Bit Server VM warning: ignoring option MaxPermSize=512M; support was
removed in 8.0
apache drill 1.11.0-mapr
"drill baby drill"
0: jdbc:drill:schema=dfs.tmp> select count(id) from `diff_types`;
Error: UNSUPPORTED_OPERATION ERROR: Streaming aggregate does not support schema
changes
Prior schema :
BatchSchema [fields=[id(BIGINT:OPTIONAL)], selectionVector=NONE]
New schema :
BatchSchema [fields=[id(INT:OPTIONAL)], selectionVector=NONE]
Fragment 0:0
[Error Id: c1c77a0e-c7cf-494e-b8d2-ef2cc7e816e0 on centos-01.qa.lab:31010]
(state=,code=0)
0: jdbc:drill:schema=dfs.tmp> select id from `dif`Display all 872
possibilities? (y or n)
0: jdbc:drill:schema=dfs.tmp> select id from `diff_types/m1.json`;
+-------+
| id |
+-------+
| 1234 |
+-------+
1 row selected (0.157 seconds)
0: jdbc:drill:schema=dfs.tmp> select id from `diff_types/m2.json`;
+-------+
| id |
+-------+
| null |
+-------+
1 row selected (0.169 seconds)
0: jdbc:drill:schema=dfs.tmp> select * from `diff_types`;
+-------+
| id |
+-------+
| 1234 |
| null |
+-------+
2 rows selected (0.209 seconds)
0: jdbc:drill:schema=dfs.tmp> select count(*) from `diff_types`;
+---------+
| EXPR$0 |
+---------+
| 2 |
+---------+
1 row selected (0.208 seconds)
{noformat}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
