getStreamEngine

Syntax

getStreamEngine(name)

Arguments

name is a string indicating the name of the stream engine. It is the only identifier of the stream engine. It can have letter, number and “_”. It must start with a letter.

Details

Return the handle of a stream engine. It can be used as the handler of a subscribeTable.

Examples

$ share streamTable(1000:0, `time`sym`qty, [TIMESTAMP, SYMBOL, INT]) as trades
$ outputTable = table(10000:0, `time`sym`sumQty, [TIMESTAMP, SYMBOL, INT])
$ tradesAggregator = createTimeSeriesEngine("StreamAggregatorDemo",3, 3, <[sum(qty)]>, trades, outputTable, `time, false,`sym, 50)
$ subscribeTable(, "trades", "tradesAggregator", 0, append!{tradesAggregator}, 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);
$ h = getStreamEngine("StreamAggregatorDemo")