How to change analyzer of an existing Neo4j index using Cypher - indexing

Question

What is the best Cypher command to change the analyzer of an existing index in Neo4j?

Answer 1

To quote from the documentation:
The db.index.fulltext.createNodeIndex and
db.index.fulltext.createRelationshipIndex takes an optional fourth
argument, called config. The config parameter is a map from string to
string, and can be used to set index-specific configuration settings.
The analyzer setting can be used to configure an index-specific
analyzer. The possible values for the analyzer setting can be listed
with the db.index.fulltext.listAvailableAnalyzers procedure.
However, if you are running the Enterprise Edition of neo4j in a clustered environment, there is currently a warning:
Using index-specific settings via the config parameter is
experimental, because these settings currently do not get replicated
in a clustered environment. See the Fulltext Schema Indexes section of
the Operations Manual, for how to configure the default fulltext index
configurations in neo4j.conf.
Here is an example of how to create a fulltext index that uses the "lithuanian" analyzer:
CALL db.index.fulltext.createNodeIndex(
"titlesAndDescriptions",
["Movie", "Book"],
["title", "description"],
{analyzer: "lithuanian"}
)
But there does not seem to be a way, using Cypher, to change the analyzer of an existing fulltext index. In fact, even if that were possible, it may not be a good idea. Since the contents of an existing index would have been created using the previous analyzer and any new additions to the index would be made with the new analyzer, index lookups could lead to very strange or error-prone results. It would be better to create an new fulltext index instead.