Luke Kot-Zaniewski created SOLR-18071:
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Summary: Export Writer should support for stored-only fields via
parameter
Key: SOLR-18071
URL: https://issues.apache.org/jira/browse/SOLR-18071
Project: Solr
Issue Type: Improvement
Reporter: Luke Kot-Zaniewski
Add a new includeStoredFields parameter to the /export handler to retrieve
stored-only fields (fields without DocValues) alongside DocValues-based fields.
The /export handler currently only supports fields with DocValues enabled, as
it uses a streaming/sorting approach that relies on DocValues for efficient
iteration. However, there are valid use cases where users need to include
stored-only fields in export results. For instance, when storing very large
text fields, DocValues may not be an option.
The enhancement should: # Add a new parameter includeStoredFields. When
enabled, it should allow stored-only fields to be included in export results
# When a stored-only field is explicitly requested in fl without
includeStoredFields=true, the handler should return an error with a hint
suggesting the parameter
# When using glob patterns (e.g., fl=*) includeStoredFields=false (explicitly
or implicitly), stored-only fields should be silently skipped. With
includeStoredFields=true, stored-only fields should be included
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