====== Exemple de cargaments amb CSV ======

  * lo fichièr es un nommat loadCantalausa.cql
  * l'escript es passat a l'interpretor del lengatge : cypher-shell


<code:bash>../bin/cypher-shell -u user -p passwd --debug < loadCantalausa.cql</code>
==== loadCantalausa.cql ====
<code sql>
MATCH (p:Phrase) DETACH DELETE p;
MATCH (c:Category) DELETE c;
MATCH (r:Response) DELETE r;
// Tables deleted

CREATE CONSTRAINT ON (p:Phrase) ASSERT p.id IS UNIQUE;
CREATE CONSTRAINT ON (r:Response) ASSERT r.id IS UNIQUE;
CREATE CONSTRAINT ON (c:Category) ASSERT c.name IS UNIQUE;
// Indices created

//Phrase
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM 'file:///cantalausa_phrase.csv' AS row
WITH row
CREATE (p:Phrase{id:TOINT(row.pid), name:row.phrase});

//Category
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM 'file:///cantalausa_tag.csv' AS row
WITH row
CREATE (c:Category{id:TOINT(row.tid), name:row.label});

//Response
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM 'file:///cantalausa_responsa.csv' AS row
WITH row
CREATE (r:Response{id:TOINT(row.rid), name:row.responsa});

// creation of the relations  

// creation of a fake node for the relation
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM 'file:///cantalausa_phrase_tags.csv' AS row
WITH row
CREATE (r:hasCategory{from:TOINT(row.pid), to:TOINT(row.tid)});

// relationship creation
MATCH (h:hasCategory) 
MATCH (c:Category{id:h.to})
MATCH (p:Phrase{id:h.from})
CREATE (p)-[:HAS_CATEGORY]->(c);

// destroying fake relation node
MATCH (h:hasCategory) DELETE h;
</code>