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https://issues.apache.org/jira/browse/HIVE-8330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14157160#comment-14157160
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Brock Noland commented on HIVE-8330:
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Hi [~spena],
Thank you for jumping on this!! I think it's possible for the members of
columnNames to be any case. Assuming that is true, then I think that in the
constructor of HiveBaseResultSet we'll have to copy the strings to a new list
normalizedColumnNames as lower case. Then we use that list to check for
existence in that list. The reason I think we should have a separate list is in
HiveResultSetMetaData we actually return the name of the column to the user and
we should be consistent with whatever case were returning previously...
Thank you!!
Brock
> HiveResultSet.findColumn() parameters are case sensitive
> --------------------------------------------------------
>
> Key: HIVE-8330
> URL: https://issues.apache.org/jira/browse/HIVE-8330
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.13.1
> Reporter: Sergio Peña
> Assignee: Sergio Peña
> Attachments: HIVE-8330.1.patch
>
>
> Look at the following code:
> {noformat}
> Class.forName("org.apache.hive.jdbc.HiveDriver");
> Connection db = null;
> Statement stmt = null;
> ResultSet rs = null;
> try {
> db =
> DriverManager.getConnection("jdbc:hive2://localhost:10000/default", "hive",
> "");
> stmt = db.createStatement();
> rs = stmt.executeQuery("SELECT * FROM sample_07 limit 1");
> ResultSetMetaData metaData = rs.getMetaData();
> for (int i = 1; i <= metaData.getColumnCount(); i++) {
> System.out.println("Column " + i + ": " +
> metaData.getColumnName(i));
> }
> while (rs.next()) {
> System.out.println(rs.findColumn("code"));
> }
> } finally {
> DbUtils.closeQuietly(db, stmt, rs);
> }
> {noformat}
> Above program will generate following result on my cluster:
> {noformat}
> Column 1: code
> Column 2: description
> Column 3: total_emp
> Column 4: salary
> 1
> {noformat}
> However, if the last print sentence is changed as following (using uppercase
> characters):
> {noformat}
> System.out.println(rs.findColumn("Code"));
> {noformat}
> The program will fail at exactly that line. The same happens if the column
> name is changed as "CODE"
> Based on the JDBC ResultSet documentation, this method should be case
> insensitive.
> "Column names used as input to getter methods are case insensitive"
> http://docs.oracle.com/javase/7/docs/api/java/sql/ResultSet.html
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