Takahiko Saito created HIVE-14005:
-------------------------------------
Summary: Changing a string column of ORC table to boolean change
values to be 'NULL'
Key: HIVE-14005
URL: https://issues.apache.org/jira/browse/HIVE-14005
Project: Hive
Issue Type: Bug
Components: Hive
Affects Versions: 2.1.1
Reporter: Takahiko Saito
{noformat]
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> set
hive.metastore.disallow.incompatible.col.type.changes=false;
No rows affected (0.015 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> set
hive.exec.dynamic.partition.mode=nonstrict;
No rows affected (0.003 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> drop table test;
No rows affected (0.224 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> create table test (s string)
stored as orc;
No rows affected (0.098 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> insert into table test values
('true');
No rows affected (1.091 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> select * from test;
+---------+--+
| test.s |
+---------+--+
| true |
+---------+--+
1 row selected (0.114 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> alter table test change column s
s boolean;
No rows affected (0.167 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> select * from test;
+---------+--+
| test.s |
+---------+--+
| NULL |
+---------+--+
1 row selected (0.098 seconds)
{noformat}
The issue is NOT seen with textfile formatted table:
{noformat}
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> set
hive.metastore.disallow.incompatible.col.type.changes=false;
No rows affected (0.013 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> set
hive.exec.dynamic.partition.mode=nonstrict;
No rows affected (0.006 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> drop table test;
No rows affected (0.224 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> create table test (s string)
stored as textfile;
No rows affected (0.116 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> insert into table test values
('true');
No rows affected (1.799 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> select * from test;
+---------+--+
| test.s |
+---------+--+
| true |
+---------+--+
1 row selected (0.085 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> alter table test change column s
s boolean;
No rows affected (0.141 seconds)
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2>
0: jdbc:hive2://os-r7-rcmpc-nat-u-hiveserver2> select * from test;
+---------+--+
| test.s |
+---------+--+
| true |
+---------+--+
1 row selected (0.093 seconds)
{noformat}
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