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https://issues.apache.org/jira/browse/SOLR-9529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17433279#comment-17433279
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David Eric Pugh commented on SOLR-9529:
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Time has gone by, and most of what is in the PR refers to files that no longer
ship with Solr in 9... However, the underlying cleanups in the PR DO appear
to apply to the {{sample_techproducts_configs}}. I haven't checked
{{_default. I'll take this Jira as I'd like to review the default configs.}}
> Dates Dynamic Field Inconsistently Defined in Schemas
> -----------------------------------------------------
>
> Key: SOLR-9529
> URL: https://issues.apache.org/jira/browse/SOLR-9529
> Project: Solr
> Issue Type: Bug
> Reporter: Trey Grainger
> Priority: Minor
>
> There is a nice convention across all of the schemas that ship with Solr to
> include field types for single valued fields (i.e. "string" -> "*_s",
> "boolean" -> "*_b") and separate field types for multivalued fields (i.e.
> "strings" -> "*_ss", "booleans" -> "*_bs"). Those definitions all follow the
> pattern (using "string" as an example):
> <fieldType name="string" class="solr.StrField" sortMissingLast="true"/>
> <fieldType name="strings" class="solr.StrField" sortMissingLast="true"
> multiValued="true"/>
> <dynamicField name="*_s" type="strings" indexed="true" stored="true"/>
> <dynamicField name="*_ss" type="strings" indexed="true" stored="true"/>
> For some reason, however, the "date" field type doesn't follow this pattern,
> and is instead defined (inconsistently) as follows:
> <fieldType name="date" class="solr.TrieDateField" positionIncrementGap="0"
> precisionStep="0"/>
> <fieldType name="dates" class="solr.TrieDateField" positionIncrementGap="0"
> multiValued="true" precisionStep="0"/>
> <dynamicField name="*_dt" type="date" indexed="true" stored="true"/>
> <dynamicField name="*_dts" type="date" multiValued="true" indexed="true"
> stored="true"/>
> Note specifically that the "*_dts" field should instead be referencing the
> "dates" type and not the "date" type, and that subsequently the
> multiValued="true" setting would become unnecessary on the "*_dts"
> dynamicField definition.
> I'll get a patch posted for this. Note that nothing is functionally broken,
> it's just inconsistent and could be confusing for someone looking through the
> schema or seeing their multivalued dates getting indexed into the field type
> defined for single valued dates.
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