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https://issues.apache.org/jira/browse/CASSANDRA-10092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sam Tunnicliffe updated CASSANDRA-10092:
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Reviewer: Sam Tunnicliffe
> Generalize PerRowSecondaryIndex validation
> ------------------------------------------
>
> Key: CASSANDRA-10092
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10092
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Andrés de la Peña
> Priority: Minor
> Labels: 2i, secondary_index, validation
> Fix For: 2.1.x, 2.2.x
>
> Attachments: improve_2i_validation.patch
>
>
> Index validation is currently done in a per-cell basis. However, per-row
> secondary index developers can be interested in validating all the written
> columns at once, because some implementations need to check the validity of a
> row write by comparing some column values against others. For example, a per
> row 2i implementation indexing time ranges (composed by a start date column
> and an end date column) should check that the start date is before the stop
> date.
> I'm attaching a patch adding a new method to {{PerRowSecondaryIndex}}:
> {code:java}
> public void validate(ByteBuffer key, ColumnFamily cf) throws
> InvalidRequestException {}
> {code}
> and a new method to {{SecondaryIndexManager}}:
> {code:java}
> public void validateRowLevelIndexes(ByteBuffer key, ColumnFamily cf) throws
> InvalidRequestException
> {
> for (SecondaryIndex index : rowLevelIndexMap.values())
> {
> ((PerRowSecondaryIndex) index).validate(key, cf);
> }
> }
> {code}
> This method is invoked in CQL {{UpdateStatement#validateIndexedColumns}}.
> This way, {{PerRowSecondaryIndex}} could perform complex write validation.
> I have tried to do the patch in the least invasive way possible. Maybe the
> current method {{SecondaryIndex#validate(ByteBuffer, Cell)}} should be moved
> to {{PerColumnSecondaryIndex}}, and the {{InvalidRequestException}} that
> informs about the particular 64k limitation should be thrown by
> {{AbstractSimplePerColumnSecondaryIndex}}. However, given the incoming
> [CASSANDRA-9459|https://issues.apache.org/jira/browse/CASSANDRA-9459], I
> think that the proposed patch is more than enough to provide rich validation
> features to 2i implementations based on 2.1.x and 2.2.x.
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