Github user huaxingao commented on the pull request:
https://github.com/apache/spark/pull/10262#issuecomment-166033287
@yhuai
JDBCSuite uses H2 database. It seems that for char(n) data type, either H2
database doesn't pad, or the H2 JDBC driver already trims the empty space for
ResultSet.getString. So H2 database doesn't have this problem. To show the
problem, it will need DB2 and DB2 JDBC driver ( I guess Oracle has the same
problem too) , but I don't think the test system has DB2 JDBC driver. So I am
guessing maybe no need to add the test?
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