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Sub-query in SQLQuery

Hello

In documentation ( http://www.gigaspaces.com/wiki/displa... ) there is written that SQLQuery supports "Sub-query - only for IN operations" but is not said how to use this feature. Could somebody post example of sub-query usage in SQLQuery ?

Regards Lukasz

{quote}This thread was imported from the previous forum. For your reference, the original is [available here|http://forum.openspaces.org/thread.jspa?threadID=3503]{quote}

asked 2010-09-17 13:58:01 -0600

lukmac gravatar image

updated 2013-08-08 09:52:00 -0600

jaissefsfex gravatar image
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Here is a simple code example that is using both IN and ORDER BY:

SQLQuery<MyClass> query = new SQLQuery<MyClass> (MyClass.class , "num IN (1,2,3) ORDER BY num");        
MyClass ret [] = gigapace.readMultiple(query, Integer.MAX_VALUE);

The space class:

public class MyClass {
    Integer num;
    String str;
    Integer id;
    @SpaceIndex (type=SpaceIndexType.BASIC)
    public Integer getNum() {
        return num;
    }
    public void setNum(Integer num) {
        this.num = num;
    }
    @SpaceIndex (type=SpaceIndexType.BASIC)
    public String getStr() {
        return str;
    }
    public void setStr(String str) {
        this.str = str;
    }
    @SpaceId (autoGenerate = false)
    @SpaceRouting
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
}

answered 2010-09-18 10:56:18 -0600

shay hassidim gravatar image
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Comments

Thank you for your answer. Let say that we have following class:

public class MyClass2 { Integer num; Date myDate;

}

And I would like to obtain something like this in sql:

Select * from MyClass m where m.num IN (Select num from MyClass2 where myDate < to_date(2000-01-01))

So in place of 1,2,3 I would like to run some query. Is this possible in SQLQuery in GigaSpace ?

lukmac gravatar imagelukmac ( 2010-09-20 00:58:02 -0600 )edit

You will have to break this into 2 separate queries. The result of the first one should be used with the second one. You can use GigaSpaces Dynamic Query support to simplify the query construction: http://www.gigaspaces.com/wiki/displa...

Shah

shay hassidim gravatar imageshay hassidim ( 2010-09-20 07:48:14 -0600 )edit

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Asked: 2010-09-17 13:58:01 -0600

Seen: 269 times

Last updated: Sep 18 '10