Cursor join with DB_SET_RANGE flag

Question

Dear experts,
Can I use "DB_SET_RANGE" flag with 'join cursor' ?
When I tested, I got an unexpected result.
Is it supported?
The type of underlying db and secondary dbs are BTree. And I'm using 4.7.25.
Thanks,

Answer 1

Dbc cursor_code ,cursor_time,*cursor_market;
Dbc carry[4];
Dbc *join_cursor;
Db * g_min;
Db *g_min_code; //index by code
Db *g_min_time;  //index by time
Db *g_min_market;  //index by market
key struct
char code[10];
flaot time;
WORD market;
data struct
int data;
omit the database create open , index database associate , cursor open
sprintf(qcode,"%06d",6);
qtime=8;
qmarket=18515;
key.set_data(&qmarket);
key.set_size(sizeof(qmarket));
ASSERT(cursormarket->get(&key,&data,DB_SET)==0);
key.set_data(qcode);
key.set_size(strlen(qcode));
ASSERT(cursorcode->get(&key,&data,DB_SET)==0);
key.set_data(&qtime);
key.set_size(sizeof(qtime));
ASSERT(cursortime->get(&key,&data,DB_SET_RANGE)==0); ///line 56
carry[0]=cursor_market;
carry[1]=cursor_time;
//carry[2]=cursor_time;
carry[2]=NULL;
ASSERT(gmin->join(carry,&join_carry,0)==0);
while(ret=join_carry->get(&key,&data,0)==0)
do
}while(ret=join_carry->get(&key,&data,DB_NEXT)==0); //when i use DB_NEXT this line throw a except by get function
when i use join ,how to use DB_SET_RANGE to get a range set
above code is inder to complete this MDL
select * from g_min where market=18515 and code="000006" and time>8
how can i do it?
thanks
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