William Preston created CASSANDRA-15042:
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Summary: 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: Legacy/Tools
Reporter: William Preston
Cassandra 3.11.4
Running a query in cqlsh with TRACING ON
Secondary indexes all report cardinalities as *1*.
trace output: "Index mean cardinalities are
country_idx:+*1*+,company_idx:_*1*_,source_idx:+*1*+,domain_idx:+*1*+. Scanning
with country_idx."
Cassandra 2.2.x and its' predecessors reported cardinalities > 1 in cqlsh
tracing output:
"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."
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