orientdb: passing an Array to a query using 'IN' on an OType.LINKLIST field

问题

I'm trying to pass an array of Category POJOs to the query using IN in the SQL:

public ShareObject[] search(String name, Category[] categories) {
...
OSQLSynchQuery<ODocument> query = new OSQLSynchQuery<ODocument>("SELECT FROM ShareObject WHERE name LIKE ? AND categories IN ?");
List<ODocument> result = db.command(query).execute(name, categories);

This will return an empty list. If I change the SQL to the following I get a result:
"SELECT FROM ShareObject WHERE name LIKE ? AND categories IN [#10:0,#10:1]"

I also tried this, without sucess:

OSQLSynchQuery<ODocument> query = new OSQLSynchQuery<ODocument>("SELECT FROM ShareObject WHERE name LIKE ? AND categories IN ?");
List<ODocument> result = db.command(query).execute(name, new String[] { "#10:0", "#10:1" });

How do I have to pass the array to the query, IDs or objects?
Do I have to change the SQL statement?
Is this even possible?

回答1:

Try this code:

OSQLSynchQuery<ODocument> query = new OSQLSynchQuery<ODocument>("SELECT FROM ShareObject WHERE name like ? AND categories IN (?)");
List<ODocument> result = db.command(query).execute(name,"[#10:0,#10:1]");

回答2:

You can try this:

String category="[";
Category[] categories={new Category("#11:3"),new Category("#11:0")};
for(int i=0;i<categories.length;i++){
    if(i==categories.length-1)
        category+=categories[i].getRid()+"]";
    else
        category+=categories[i].getRid()+",";
}
OSQLSynchQuery<ODocument> query = new OSQLSynchQuery<ODocument>("SELECT FROM ShareObject WHERE name like ? AND categories IN (?)");
List<ODocument> result = db.command(query).execute(name,category);

来源：https://stackoverflow.com/questions/34391006/orientdb-passing-an-array-to-a-query-using-in-on-an-otype-linklist-field

标签

java

sql

OrientDB

nosql