How to Import From Mysql to Avro with Impala
This blog explains how to Import from Mysql to Avro with Impala and and Hive Query
Command Line for Sqoop :
[cloudera@quickstart ~]$ sqoop import-all-tables \
-m 1 \
–connect jdbc:mysql://quickstart:3306/retail_db \
When this command is complete, confirm that your Avro data files exist in HDFS.
[cloudera@quickstart ~]$ hadoop fs -ls /user/hive/warehouse
Sqoop should also have created schema files for this data in your home directory.
Avro schema files:
[cloudera@quickstart ~]$ ls -l *.avsc
Apache Hive will need the schema files too, so let’s copy them into HDFS where Hive can easily access them.
[cloudera@quickstart ~]$ sudo -u hdfs hadoop fs -mkdir /user/examples
[cloudera@quickstart ~]$ sudo -u hdfs hadoop fs -chmod +rw /user/examples
[cloudera@quickstart ~]$ hadoop fs -copyFromLocal ~/*.avsc /user/examples/
With Impala, import all this schema avro tables
CREATE EXTERNAL TABLE categories STORED AS AVRO
CREATE EXTERNAL TABLE customers STORED AS AVRO
CREATE EXTERNAL TABLE departments STORED AS AVRO
CREATE EXTERNAL TABLE orders STORED AS AVRO
CREATE EXTERNAL TABLE order_items STORED AS AVRO
CREATE EXTERNAL TABLE products STORED AS AVRO
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