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From: Curtis Boyden <cboyden@pentaho.com>
To: "dev@hive.apache.org" <dev@hive.apache.org>
Date: Thu, 28 Apr 2011 13:25:13 -0500
Subject: Hive's JDBC Driver version
Thread-Topic: Hive's JDBC Driver version
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Hello Hive People!

               I need to know what version of the Hive JDBC Driver I am wor=
king with so that I know what to expect back for column names when I execut=
e a Select statement. For example in 0.5.0 "SELECT account_id FROM account"=
 yields the column name "_col0" whereas in 0.6.0 the same query returns the=
 column name "account_id".

               My question regards the correct way to store the driver vers=
ion information. I see in HiveDatabaseMetaData I see that getVersion() fetc=
hes a full string from the manifest file while getDriverMajorVersion() and =
getDriverMinorVersion() return a local, static 0. The HiveDriver also provi=
des Driver version information through its methods getMajorVersion() and ge=
tMinorVersion() and they both return static int 0 that are scoped to the cl=
ass.

               I am primarily interested in the HiveDriver.get...Version() =
methods as I do not want to create a DB connection first to check the Datab=
aseMetaData, and my first thought is to update the MAJOR_VERSION/MINOR_VERS=
ION values accordingly. Next I was going to change the ..._VERSION static i=
nt values to be package visible and use them in HiveDatabaseMeta's getDrive=
rMajorVersion()/getDriverMinorVersion().
               The cost is that someone must manually update the static int=
 values on HiveDriver for each version revision.

               So I was wondering if it would be preferred that all version=
 information is pulled from the manifest file, or if I should move forward =
with my usage of the HiveDriver static final ints.

               If the manifest version is to be used, should we create two =
new fields for Major Version / Minor Version or parse the already existing =
"Implementation-Version".


               Thank you for your direction,
               -Curtis

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