n=1000000
tmpTrades = table(n:0, colNames, colTypes)
lastMinute = [00:00:00.000]
colNames = `time`sym`vwap
colTypes = [MINUTE,SYMBOL,DOUBLE]
enableTableShareAndPersistence(table=streamTable(n:0, colNames, colTypes), tableName="vwap_stream")
go
def calcVwap(mutable vwap, mutable tmpTrades, mutable lastMinute, msg){
tmpTrades.append!(msg)
curMinute = time(msg.time.last().minute()*60000l)
t = select wavg(price, qty) as vwap from tmpTrades where time < curMinute, time >= lastMinute[0] group by time.minute(), sym
if(t.size() == 0) return
vwap.append!(t)
t = select * from tmpTrades where time >= curMinute
tmpTrades.clear!()
lastMinute[0] = curMinute
if(t.size() > 0) tmpTrades.append!(t)
}
subscribeTable(tableName="trades_stream", actionName="vwap", offset=-1, handler=calcVwap{vwap_stream, tmpTrades, lastMinute}, msgAsTable=true)
我的订阅是这样的，但是发现，即使上游的发布表vwap_stream的数据注入是5000条每批次，但是每次触发handler的最大条数是1024条，请问是怎么回事？
