getTopicProcessedOffset
Syntax
getTopicProcessedOffset(topic)
Arguments
topic is the subscription topic returned by function subscribeTable
Details
- If parameter persistOffset of function
subscribeTable
is true, return the offset of the last subscribed message that has been processed. - If parameter persistOffset of function
subscribeTable
is false, return -1.
Examples
share streamTable(1000:0, `time`sym`qty, [TIMESTAMP, SYMBOL, INT]) as trades
trades_1 = streamTable(1000:0, `time`sym`qty, [TIMESTAMP, SYMBOL, INT])
topic=subscribeTable(tableName="trades", actionName="trades_1", offset=0, handler=append!{trades_1}, msgAsTable=true, persistOffset=true)
def writeData(n){
timev = 2018.10.08T01:01:01.001 + timestamp(1..n)
symv =take(`A`B, n)
qtyv = take(1, n)
insert into trades values(timev, symv, qtyv)
}
writeData(6);
select * from trades_1;
time | sym | qty |
---|---|---|
2018.10.08T01:01:01.002 | A | 1 |
2018.10.08T01:01:01.003 | B | 1 |
2018.10.08T01:01:01.004 | A | 1 |
2018.10.08T01:01:01.005 | B | 1 |
2018.10.08T01:01:01.006 | A | 1 |
2018.10.08T01:01:01.007 | B | 1 |
getTopicProcessedOffset(topic);
// output
5