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https://issues.apache.org/jira/browse/HIVE-11327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yannik Zuehlke updated HIVE-11327:
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Tags: hive, predicatepushdown, hbase (was: hive predicatepushdown)
> HiveQL to HBase - Predicate Pushdown for composite key not working
> ------------------------------------------------------------------
>
> Key: HIVE-11327
> URL: https://issues.apache.org/jira/browse/HIVE-11327
> Project: Hive
> Issue Type: Bug
> Components: HBase Handler, Hive
> Affects Versions: 0.14.0
> Reporter: Yannik Zuehlke
> Priority: Blocker
>
> I am using Hive 0.14 and Hbase 0.98.8 I would like to use HiveQL for
> accessing a HBase "table".
> I created a table with a complex composite rowkey:
> ----
> {quote}
> CREATE EXTERNAL TABLE db.hive_hbase (rowkey struct<p1:string, p2:string,
> p3:string>, column1 string, column2 string)
> ROW FORMAT DELIMITED FIELDS TERMINATED BY ','
> COLLECTION ITEMS TERMINATED BY ';'
> STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
> WITH SERDEPROPERTIES ("hbase.columns.mapping" =
> ":key,cf:c1,cf:c2")
> TBLPROPERTIES("hbase.table.name"="hbase_table");
> {quote}
> ----
> The table is getting successfully created, but the HiveQL query is taking
> forever:
> ----
> {quote}
> SELECT * from db.hive_hbase WHERE rowkey.p1 = 'xyz';
> {quote}
> ----
> I am working with 1 TB of data (around 1,5 bn records) and this queries takes
> forever (It ran over night, but did not finish in the morning).
> I changed the log4j properties to 'DEBUG' and found some interesting
> information:
> ----
> {quote}
> 2015-07-15 15:56:41,232 INFO ppd.OpProcFactory
> (OpProcFactory.java:logExpr(823)) - Pushdown Predicates of FIL For Alias :
> hive_hbase
> 2015-07-15 15:56:41,232 INFO ppd.OpProcFactory
> (OpProcFactory.java:logExpr(826)) - (rowkey.p1 = 'xyz')
> {quote}
> ----
> But some lines later:
> ----
> {quote}
> 2015-07-15 15:56:41,430 DEBUG ppd.OpProcFactory
> (OpProcFactory.java:pushFilterToStorageHandler(1051)) - No pushdown possible
> for predicate: (rowkey.p1 = 'xyz')
> {quote}
> ----
> So my guess is: HiveQL over HBase does not do any predicate pushdown but
> starts a MapReduce job.
> The normal HBase scan (via the HBase Shell) takes around 5 seconds.
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