Description
The echo Streaming Expression takes a text string as an argument and emits a single tuple that "echos" the text string.
This will allow constructs that "echo" text to various decorators such as select, cartesianProduct, update and classify.
Sample syntax:
select(echo("hello world"), analyze(echo, analyzerField) as out)
Commit d5e5b5e948e151f61cddf1c57eda2940aebcc07d in lucene-solr's branch refs/heads/master from jbernste
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=d5e5b5e ]
SOLR-10504: Add echo Streaming Expression