ramtin created MAPREDUCE-6246:
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Summary: DBOutputFormat.java appending extra semicolon to query
which is incompatible with DB2
Key: MAPREDUCE-6246
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6246
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv1, mrv2
Affects Versions: 2.4.1
Environment: OS: RHEL 5.x, RHEL 6.x, SLES 11.x
Platform: xSeries, pSeries
Browser: Firefox, IE
Security Settings: No Security, Flat file, LDAP, PAM
File System: HDFS, GPFS FPO
Reporter: ramtin
Assignee: ramtin
In DBOutputFormat class there is constructQuery method that generates "INSERT
INTO" statement with semicolon(;) at the end.
Semicolon is ANSI SQL-92 standard character for a statement terminator but this
feature is disabled(OFF) as a default settings in IBM DB2.
Although by using -t we can turn it ON for db2.
(http://www-01.ibm.com/support/knowledgecenter/SSEPGG_9.7.0/com.ibm.db2.luw.admin.cmd.doc/doc/r0010410.html?cp=SSEPGG_9.7.0%2F3-6-2-0-2).
But there are some products that already built on top of this default setting
(OFF) so by turning ON this feature make them error prone.
I changed the current DBOutputFormat class by checking the product name from
connection object to see if it is DB2 then generates "INSERT INTO" command
without semicolon(;).
This technique is already used in DBInputFormat class for generating different
"SELECT" statements for Oracle and MySQL databases.
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