Query metadata from HIVE using MySQL as metastore

问题:

I am looking for a way to query the metadata of my HIVE data with a HiveQL command.

I configured a MySQL metastore, but it is necessary to query the metadata via HIVE command because then I want to access the data with ODBC connection to the HIVE system.

Thanks in advanced.

回答1:

You can do it currently using Hive JDBC StorageHandler: https://github.com/qubole/Hive-JDBC-Storage-Handler

Example of table creation from their page:

DROP TABLE HiveTable;
CREATE EXTERNAL TABLE HiveTable(
  id INT,
  id_double DOUBLE,
  names STRING,
  test INT
)
STORED BY 'org.apache.hadoop.hive.jdbc.storagehandler.JdbcStorageHandler'
TBLPROPERTIES (
  "mapred.jdbc.driver.class"="com.mysql.jdbc.Driver",
  "mapred.jdbc.url"="jdbc:mysql://localhost:3306/rstore",
  "mapred.jdbc.username"="root",
  "mapred.jdbc.input.table.name"="JDBCTable",
  "mapred.jdbc.output.table.name"="JDBCTable",
  "mapred.jdbc.password"="",
  "mapred.jdbc.hive.lazy.split"= "false"
);

I tested, it works fine with MySQL. And FilterPushDown also works.