Re: [geomesa-users] -EXT- Need Help with Adding Attribute to GeoMesa Sch

["Lahr-Vivaz, Emilio" <Emilio.Lahr-Vivaz@xxxxxxxxxxx>]

Hello,

I think you just need to copy the feature-type user data into the updated object, i.e.:

https://github.com/locationtech/geomesa/blob/7e7aa244cfaf94e9703516cbd1a87461d52f5980/geomesa-tools/src/main/scala/org/locationtech/geomesa/tools/data/UpdateSchemaCommand.scala#L95-L96

Otherwise, it thinks you're trying to make changes that you aren't intending.

Thanks,

Emilio Lahr-Vivaz

General Atomics, CCRi

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From: geomesa-users <geomesa-users-bounces@xxxxxxxxxxx> on behalf of Rinchin Gomboev via geomesa-users <geomesa-users@xxxxxxxxxxx>
Sent: Friday, January 17, 2025 11:34 AM
To: Geomesa project user mailing list <geomesa-users@xxxxxxxxxxx>
Cc: Rinchin Gomboev <gomboev.rinchin@xxxxxxxxx>
Subject: -EXT-[geomesa-users] Need Help with Adding Attribute to GeoMesa Schema Programmatically

 

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Hi everyone. I’ve encountered an issue while trying to add a new attribute to an existing schema programmatically, and I was hoping you could assist me in resolving it.

The schema configuration is as follows:

./geomesa-accumulo get-sft-config -c myNamespace.geomesa -z 127.0.0.1 -i accumulo -u root -p GisPwd -f SignalBuilder --format spec

Result:

*geo:Point,time:Date,cam:String:keep-stats=true,imei:String,dir:Double,alt:Double,vlc:Double,sl:Integer,ds:Integer,dir_y:Double,poi_azimuth_x:Double,poi_azimuth_y:Double; geomesa.stats.enable='true',geomesa.z.splits='4',geomesa.feature.expiry='time(30 days)',geomesa.table.partition='time',geomesa.index.dtg='time', geomesa.indices='z3:7:3:geo:time,z2:5:3:geo,attr:8:3:cam:time',geomesa.attr.splits='4',geomesa.z3.interval='week'

I tried to add a new attribute sourceType to this schema programmatically using the following code:

private void createOrUpdateSchema(DataStore ds, String typeName) throws IOException {
    SimpleFeatureType existingSFT = ds.getSchema(typeName);

    if (existingSFT != null) {
        if (existingSFT.getDescriptor("sourceType") == null) {
            SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
            builder.init(existingSFT);
            builder.add("sourceType", String.class);
            SimpleFeatureType updatedSFT = builder.buildFeatureType();
            ds.updateSchema(typeName, updatedSFT);
        }
    }
}

However, when I run this code, it throws the following exception:

java.lang.UnsupportedOperationException: Changing the default date attribute is not supported

At the same time, when I use the GeoMesa CLI tool to add the same attribute, it works without any issues:

./geomesa-accumulo update-schema -c myNamespace.geomesa -z 127.0.0.1 -i accumulo -u root -p GisPwd -f SignalBuilder --add-attribute sourceType:String

INFO  Preparing to update schema 'SignalBuilder':
  1: Adding attribute 'sourceType' of type java.lang.String
Continue (y/n)? y
INFO  Updating, please wait...
INFO  Update complete

Question:

Why does adding a new attribute via the Java API (updateSchema) fail with the error Changing the default date attribute is not supported, while the same operation using the CLI tool succeeds? How can I achieve this programmatically without using the CLI?

I appreciate your time and any guidance you can provide.

--

Best regards,

Rinchin Gomboev