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https://issues.apache.org/jira/browse/CASSANDRA-15042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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William Preston updated CASSANDRA-15042:
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Component/s: Feature/SASI
> cqlsh tracing output reports all secondary "Index mean cardinalities" are 1.
> -----------------------------------------------------------------------------
>
> Key: CASSANDRA-15042
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15042
> Project: Cassandra
> Issue Type: Bug
> Components: Feature/SASI, Legacy/Tools, Observability/Tracing
> Reporter: William Preston
> Priority: Low
>
> Cassandra 3.11.4
> Running a query in cqlsh with TRACING ON
> Secondary indexes all report cardinalities as *1*.
> trace output:
> {noformat}
> Index mean cardinalities are
> country_idx:1,company_idx:1,source_idx:1,domain_idx:1. Scanning with
> country_idx.
> {noformat}
> Cassandra 2.2.x and its' predecessors reported cardinalities > 1 in cqlsh
> tracing output:
> {noformat}
> Candidate index mean cardinalities are
> CompositesIndexOnRegular{columnDefs=[ColumnDefinition
> {name=country, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR,
> componentIndex=0, indexName=country_idx, indexType=COMPOSITES}
> ]}:2, CompositesIndexOnRegular{columnDefs=[ColumnDefinition
> {name=company, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR,
> componentIndex=0, indexName=company_idx, indexType=COMPOSITES}
> ]}:1210, CompositesIndexOnRegular{columnDefs=[ColumnDefinition
> {name=source, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR,
> componentIndex=0, indexName=source_idx, indexType=COMPOSITES}
> ]}:501804, CompositesIndexOnRegular{columnDefs=[ColumnDefinition
> {name=domain, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR,
> componentIndex=0, indexName=domain, indexType=COMPOSITES}
> ]}:325801.
> Scanning with country_idx.{noformat}
>
>
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