Task.lastSuccess does not return last successful task run time #3430

[zcattacz]

#3430 still stands in InfluxDB v2.7.7 (git: e9e0f744fa) build_date: 2024-07-11T18:45:02Z
Always return orTime.

[sanderson]

@zcattacz In what context are you running this function? Is it in a task, or just a one-off query?

[zcattacz]

Hi thanks for replying.
I use it in the following script. Which is run in query for debugging and then in task for the job. I intent to reporting for the issue in Task.

import "sql"
import "strings"
import "experimental/array"
import "join"
import "date"
import "influxdata/influxdb/tasks"
import "types"

// without this the webUI for Task wouldn't let me save, 
// "Invalid flux script. Please check your query text."
// though with this the webUI sometimes underlines "task", 
// hinting "Avoid using `task` as an identifier name ... it may be provided at runtime.
// I checked task name is identical.
// not sure if this is related or what is the right way to handle this
option task = {name: "cq_mstat_5m", every: 5m, offset: 30s}

cnlTbl =
    sql.from(
        driverName: "postgres",
        dataSourceName: "postgresql://...",
        query:"...",
    )

arrCnls =
    cnlTbl
        |> tableFind(fn: (key) => true)
        |> getColumn(column: "cnl_num")

_tDstEnd =
    from(bucket: "cache_mach_stat_5m")
        |> range(start: time(v: "2020-01-01T00:00:00.00Z"))
        |> max(column: "_time")
        |> last(column: "_time")
        |> tableFind(fn: (key) => true)
        |> getColumn(column: "_time")
tDstEnd = _tDstEnd[0]

//_tPrevTaskSucc =
//    from(bucket: "cq_task_param")
//        |> range(start: time(v: "2020-01-01T00:00:00Z"))
//        |> filter(fn: (r) => r._measurement == "cq_mstat_5m" and r._field == "lastSucc")
//        |> sort(columns: ["_time"], desc: true)
//        |> first()
//        |> tableFind(fn: (key) => true)
//        |> getColumn(column: "_time")

//It was,
tPrevTaskSucc = tasks.lastSuccess(orTime: tDstEnd)

//tPrevTaskSucc = _tPrevTaskSucc[0]

tDstEnd1 =
    if tDstEnd < tPrevTaskSucc then
        date.add(d: 7d, to: tDstEnd)
    else
        date.add(d: task.every, to: tPrevTaskSucc)

array.from(
    rows: [
        {"_time": now(), "_field": "tPrevTaskSucc", "_value": tPrevTaskSucc},
        //{"_time": now(), "_field": "tDstEnd", "_value": tDstEnd},
        //{"_time": now(), "_field": "tSrcEnd", "_value": tSrcEnd[0]},
    ],
)
    |> set(key: "_measurement", value: "rplc_cq")
    |> to(bucket: "rplc1_cq_param")

//...

I add this as task then manually repeatedly executed for a few times, the WebUI always report success, later when I check the rplc1_cq_param bucket, tPrevTaskSucc is always the same value.

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