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SQL Windowing Functions for Hadoop
This project forked from hbutani/sqlwindowing
SQL Windowing Functions for Hadoop
SQL Windowing ============= SQL Windowing provides a add-on component for Apache Hive for SQL Windowing clauses and table functions. Windowing Queries can be expressed on any hive Query or Table or on an HDFS file. The Engine generates a MR job to evaluate the windowing functions. Support for 16 functions divided into: Ranking, Aggregation and navigation. Support for both value and range boundaries for Windows. Table functions can be invoked as table expressions in Select statements; Table functions maybe chained together. Read a detailed introduction at https://github.com/hbutani/SQLWindowing/wiki; a writeup on the internal details is at https://github.com/hbutani/SQLWindowing/blob/master/docs/Windowing.pdf Getting Started ============== - download com.sap.hadoop.windowing-0.0.2-SNAPSHOT.jar - copy it to $HIVE_HOME/lib - download groovy-all-1.8.0.jar and copy it to $HIVE_HOME/lib. If you want a more recent version of groovy, download from http://groovy.codehaus.org/Download - cp $HIVE_HOME/bin/ext/cli.sh $HIVE_HOME/bin/ext/windowCli.sh - edit windowCli.sh; change to THISSERVICE=windowingCli export SERVICE_LIST="${SERVICE_LIST}${THISSERVICE} " windowingCli () { CLASS=com.sap.hadoop.windowing.WindowingHiveCliDriver if $cygwin; then HIVE_LIB=`cygpath -w "$HIVE_LIB"` fi JAR=${HIVE_LIB}/com.sap.hadoop.windowing-0.0.2-SNAPSHOT.jar exec $HADOOP jar $JAR $CLASS "$@" } windowingCli_help () { windowingCli "--help" } - to run invoke: hive --service windowingCli - in a session use wmode to switch between hive & windowing mode. For e.g.: wmode windowing; from census_q1 partition by county order by county, arealand desc with rank() as r select county, tract, arealand, r into path='/tmp/wout'; wmode hive; exit; Requirements ============ - Java 1.6 - Hadoop 0.20.x (x >= 1) - Hive > 0.7.1
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