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A bash script that deletes Redis keys by pattern using SCAN
#!/bin/bash
if [ $# -ne 3 ]
then
echo "Delete keys from Redis matching a pattern using SCAN & DEL"
echo "Usage: $0 <host> <port> <pattern>"
exit 1
fi
cursor=-1
keys=""
while [ $cursor -ne 0 ]; do
if [ $cursor -eq -1 ]
then
cursor=0
fi
reply=`redis-cli -h $1 -p $2 SCAN $cursor MATCH $3`
cursor=`expr "$reply" : '\([0-9]*[0-9 ]\)'`
keys=${reply##[0-9]*[0-9 ]}
redis-cli -h $1 -p $2 DEL $keys
done
@OmriManor

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commented May 18, 2016

Hi Itamar,

You have a serious bug in line 21. It should be instead keys=${reply/[0-9]+ /}. Your code (wrongly) assumes that keys never have any digits in them.

Best regards,
Dynamic Yield ltd.

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