| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| if [ "$1" = '' ]; then |
| echo "Usage: compute_stats '<table_name>(<comma separated column list>)'" |
| exit 1 |
| fi |
| d=`mktemp -d compute_stats_XXXX` |
| echo -n "Removing hive temp tables from previous runs if any..." |
| test=`/mnt/vol/hive/stable/cluster/bin/hadoop dfs -ls compute_stats_test 2>>$d/err` |
| if [ "$test" != '' ]; then |
| /mnt/vol/hive/stable/cluster/bin/hadoop dfs -rmr compute_stats_test >>$d/err 2>&1 |
| /mnt/vol/hive/stable/cluster/bin/hadoop dfs -rmr /Trash/Current/compute_stats_test >> $d/err 2>&1 |
| fi |
| echo "Done" |
| |
| echo -n "Project out columns to test table using hive..." |
| /mnt/vol/hive/stable/cluster/bin/hadoop jar /mnt/vol/hive/stable/lib/hive/fb_hive.jar com.facebook.hive.streaming.HiveStreaming -select $1 -sample 1/1024 -output compute_stats_test -numReduceTasks 0 >> $d/err 2>&1 |
| echo "Done" |
| |
| test=`/mnt/vol/hive/stable/cluster/bin/hadoop dfs -ls compute_stats_test 2>>$d/err` |
| if [ "$test" != '' ]; then |
| echo -n "Generate single local file out of hdfs table..." |
| /mnt/vol/hive/stable/cluster/bin/hadoop dfs -cat /user/`whoami`/compute_stats_test/* 2>>$d/err | gzip > $d/sample.gz |
| echo "Done" |
| n=`zcat $d/sample.gz | head -1 | tr ',' '\n' | wc -l` |
| echo "Generate stats for each of the projected columns..." |
| for ((i=1;i<=$n;i+=1)); do |
| echo " column $i" |
| zcat $d/sample.gz | cut -f$i -d',' | sort | uniq -c > $d/$i.stats; |
| count=`cat $d/$i.stats | wc -l`; |
| echo $i $count >> $d/overall.stats; |
| done |
| echo "Done" |
| echo "Stats in $d" |
| else |
| echo "Error extracting columns from table!"; |
| fi |