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Wrong column type when use wildcard with @Measurement  #609

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@kalwinskidawid

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@kalwinskidawid
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Steps to reproduce:

@Getter
public abstract class InfluxDbDefaultPoint<T> {

    @Column(timestamp = true)
    private final Instant time;
    @Column(tag = true)
    private final Long deviceId;
    @Column
    private final T value;

    public InfluxDbDefaultPoint(final Long deviceId, final T value) {
        this.time = Instant.now();
        this.deviceId = deviceId;
        this.value = value;
    }
}

@Measurement(name = "temperature")
public class InfluxDbTemperaturePoint extends InfluxDbDefaultPoint<Double> {

    public InfluxDbTemperaturePoint(Long deviceId, Double value) {
        super(deviceId, value);
    }
}

public static void main(String[] args) {
        final InfluxDBClient database = InfluxDBClientFactory.create("http://localhost:8200","<token>".toCharArray(),"<org>","<bucket>");
        database.getWriteApiBlocking().writeMeasurement(WritePrecision.S, new InfluxDbTemperaturePoint(0L,30.0));
    }

When I try to send such a prepared model to influxdb, I get an error: HTTP status code: 422; Message: failure writing points to database: partial write: field type conflict: input field "value" on measurement "temperature" is type string, already exists as type float dropped=1.

Previously I had an InfluxDbTemperaturePoint object without wildcard and it worked fine - it saved double

Expected behavior:
It should save the value 30.0 as float/dobule.

Actual behavior:
It tries to save the value 30.0 as a string.

Specifications:

  • Client Version: 6.9.0
  • InfluxDB Version: v2.7.1
  • JDK Version: Java(TM) SE Runtime Environment (build 19.0.2+7-44)
  • Platform: Windows

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