3.6 - Result Count on Full-text Indexes

[alexiudice]

This PR is on top of the story--luceneFulltextSort PR. Once that PR is merged this PR will reduce down to a single commit.

Changes

• Adds procedures db.index.fulltext.countNodes(<indexName>, <query>) and db.index.fulltext.countRelationships(<indexName>, <query>)
• Both procedures return a single row count that contains the number of matching nodes xor relationships found from the query.

Usage

Straightforward usage, first create a fulltext index and then you will be able to call the count procedure.

E.x.

CALL db.index.fulltext.countNodes("countIndex", "*") YIELD count
RETURN count

would return the total number of nodes in the countIndex.

CALL db.index.fulltext.countNodes("countIndex", "john") YIELD count
RETURN count

would return the total number of nodes that are found when querying for the string john.

[alexiudice]

New branch