Hello Hive People!
I need to know what version of the Hive JDBC Driver I am working
with so that I know what to expect back for column names when I execute 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 version
information. I see in HiveDatabaseMetaData I see that getVersion() fetches a
full string from the manifest file while getDriverMajorVersion() and
getDriverMinorVersion() return a local, static 0. The HiveDriver also provides
Driver version information through its methods getMajorVersion() and
getMinorVersion() and they both return static int 0 that are scoped to the
class.
I am primarily interested in the HiveDriver.get...Version()
methods as I do not want to create a DB connection first to check the
DatabaseMetaData, and my first thought is to update the
MAJOR_VERSION/MINOR_VERSION values accordingly. Next I was going to change the
..._VERSION static int values to be package visible and use them in
HiveDatabaseMeta's getDriverMajorVersion()/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
