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From "William Preston (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-15042) cqlsh tracing output reports all secondary "Index mean cardinalities" are 1.
Date Mon, 04 Mar 2019 20:42:00 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-15042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

William Preston updated CASSANDRA-15042:
----------------------------------------
    Description: 
Cassandra 3.11.4
 Running a query in cqlsh with TRACING ON

Secondary indexes all report cardinalities as *1*.

trace output:
{code:java}
Index mean cardinalities are country_idx:1,company_idx:1,source_idx:1,domain_idx:1. Scanning
with country_idx.
{code}
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."

 

  was:
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."

 


> 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
>            Priority: Minor
>
> Cassandra 3.11.4
>  Running a query in cqlsh with TRACING ON
> Secondary indexes all report cardinalities as *1*.
> trace output:
> {code:java}
> Index mean cardinalities are country_idx:1,company_idx:1,source_idx:1,domain_idx:1. Scanning
with country_idx.
> {code}
> 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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