Tejaskriya Madhan created HDDS-11546:
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Summary: Implement regex matching operation for --filter option of
ldb scan command
Key: HDDS-11546
URL: https://issues.apache.org/jira/browse/HDDS-11546
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Tejaskriya Madhan
Assignee: Tejaskriya Madhan
Currently, `ozone debug ldb scan` command has a `--filter` option supporting
the following operations for the records stored in the rocksDB: `EQUALS, MIN,
MAX`.
Adding support for matching with regex will be useful while debugging as any
pattern of keys can be found with it.
For example, if a value has many fields like [name, location->[address, DN,
IP], version, lastUpdateTime]:
using the option `--filter=\{name:regex:^a.*}` will display records with name
that start with the letter 'a'
A fields along with the regex that should be used to is given to the command,
and only those records passing the condition it will be shown.
{code:java}
eg.) ozone debug ldb --db=/data/metadata/om.db scan --cf=volumeTable
--filter="usedNamespace:greater:2,adminName:regex:^a.*a$"
--> Will show only the records having usedNamespace>2 and adminName starting
and ending with the letter 'a'.{code}
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