Support Return Clause after Create Clause

Create Clause passes information to the next clause from the previous
clause

Create Clause supports variables

Create Rescan method for CREATE clause. It will throw an error

Author: JoshInnis

regress/expected/cypher_create.out

@@ -102,10 +102,75 @@ SELECT * FROM cypher('cypher_create', $$
 	CREATE (a)-[:e_var {name: a.name + ' -> new node'}]->(:n_other_node)
 $$) as (a agtype);
 
+SELECT * FROM cypher('cypher_create', $$
+	MATCH (a:n_var)
+	WHERE a.name = 'Node A'
+	CREATE (a)-[b:e_var]->()
+$$) as (a agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE (a)-[:b_var]->()
+	RETURN a, id(a)
+$$) as (a agtype, b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE ()-[b:e_var]->()
+	RETURN b, id(b)
+$$) as (a agtype, b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE (a)-[b:e_var {id: 0}]->()
+	RETURN a, b, b.id, b.id + 1
+$$) as (a agtype, b agtype, c agtype, d agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	MATCH (a:n_var)
+	CREATE (a)-[b:e_var]->(a)
+	RETURN a, b
+$$) as (a agtype, b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	MATCH (a:n_var)
+	CREATE (a)-[b:e_var]->(c)
+	RETURN a, b, c
+$$) as (a agtype, b agtype, c agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE (a)-[:e_var]->()
+	RETURN a
+$$) as (b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE ()-[b:e_var]->()
+	RETURN b
+$$) as (b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE p=()-[:e_var]->()
+	RETURN p
+$$) as (b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE p=(a {id:0})-[:e_var]->(a)
+	RETURN p
+$$) as (b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	MATCH (a:n_var)
+	CREATE p=(a)-[:e_var]->(a)
+	RETURN p
+$$) as (b agtype);
+
+SELECT * FROM cypher('cypher_create', $$
+	CREATE p=(a)-[:e_var]->(), (a)-[b:e_var]->(a)
+	RETURN p, b
+$$) as (a agtype, b agtype);
+
 SELECT * FROM cypher('cypher_create', $$
 	MATCH (a:n_var)
 	WHERE a.name = 'Node Z'
-	CREATE (a)-[:e_var {name: a.name + ' -> doesn''t exist'}]->(:n_other_node)
+	CREATE (a)-[:e_var {name: a.name + ' -> doesnt exist'}]->(:n_other_node)
+	RETURN a
 $$) as (a agtype);
 
 SELECT * FROM cypher_create.n_var;
@@ -135,11 +200,27 @@ SELECT * FROM cypher('cypher_create', $$
 $$) as (a agtype);
 
 SELECT * FROM cypher('cypher_create', $$
-	MATCH (a:n_var)
+	MATCH (a:n_var)-[b]-()
 	WHERE a.name = 'Node A'
 	CREATE (a)-[b:e_var]->()
 $$) as (a agtype);
 
+-- Not a valid path
+SELECT * FROM cypher('cypher_create', $$
+	CREATE p=(a)
+	RETURN p
+$$) as (a agtype);
+
+--CREATE with joins
+SELECT *
+FROM cypher('cypher_create', $$
+	CREATE (a)
+	RETURN a
+$$) as q(a agtype),
+cypher('cypher_create', $$
+	CREATE (b)
+	RETURN b
+$$) as t(b agtype);
 
 -- column definition list for CREATE clause must contain a single agtype
 -- attribute