Michael Fu created SPARK-22113:
----------------------------------
Summary: Dataset shows in Hive is inconsistent with JDBC
Key: SPARK-22113
URL: https://issues.apache.org/jira/browse/SPARK-22113
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.2.0
Environment: version 2.2.0
Reporter: Michael Fu
I am trying to query data from Hive in spark. According spark-sql document,
there're two ways to do this:
The first way is Init session with _enableHiveSupport_
{code:java}
SparkSession session = SparkSession.builder().enableHiveSupport().getOrCreate();
session.sql("select dw_date from tfdw.dwd_dim_date limit 10").show();
{code}
the dataset shows the correct result
!https://i.stack.imgur.com/gBJCj.png!
The second way is through JDBC
{code:java}
Dataset<Row> ds = session.read()
.format("jdbc")
.option("driver", "org.apache.hive.jdbc.HiveDriver")
.option("url", "jdbc:hive2://iZ11syxr6afZ:21050/;auth=noSasl")
.option("dbtable", "tfdw.dwd_dim_date")
.load();
ds.select("dw_date").limit(10).show();
{code}
But the dataset only show the column name in the result rather than the data in
the column
!https://i.stack.imgur.com/FBMDN.png!
The two pictures should be consistent I think. Any outstanding I missed ? Many
thanks!
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
