[openCypher Compatibility] Support for parameters

[randomJoe211]

I can't create nodes from a list parameter because nGQL does not support parameters yet.

[czpmango]

This is the format of openCypher's tck test case.
It is recommended to execute the statement in the neo4j console to ensure the accuracy of the description.

[czpmango]

:param events=>[{ year : 2014, id : 1},{ year : 2014, id : 2}];
unwind $events as event
merge (y:Year {year:event.year})
merge (y)<-[:IN]-(e:Event {id:event.id})
return e.id as x
order by x;

[czpmango]

This is my test in neo4j console:

neo4j@neo4j> :param events=>[{ year : 2014, id : 1},{ year : 2014, id : 2}];
neo4j@neo4j> unwind $events as event
             merge (y:Year {year:event.year})
             merge (y)<-[:IN]-(e:Event {id:event.id})
             return e.id as x
             order by x;
+---+
| x |
+---+
| 1 |
| 2 |
+---+

2 rows available after 1376 ms, consumed after another 830 ms
Added 3 nodes, Created 2 relationships, Set 3 properties, Added 3 labels

[czpmango]

@randomJoe211
You could use the markdown format to describe the issue instead of the picture. Because the picture is not convenient to copy.

[randomJoe211]

@randomJoe211
You could use the markdown format to describe the issue instead of the picture. Because the picture is not convenient to copy.

Sure. I'll do that. Thanks.

[CPWstatic]

Please keep track with vesoft-inc/nebula#2593