When creating a JoinTableDataSource with a DynamicMapLayer and a QueryTableDataSource, columns from the DynamicMapLayer have a random table name.

解决办法

Option 1:

Set the rightTableSource to a TableDataSource instead of a QueryTableDataSource. However, the entire table is joined by performing this. Refer to:

• TableDataSource: https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-Sublayer.html#TableDataSource
• QueryTableDataSource: https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-Sublayer.html#QueryTableDataSource

Option 2:

The random column names from the DynamicMapLayer for further steps such as query are in the 'fields' of the Sublayer. Refer to:

• Sublayer.fields: https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-Sublayer.html#fields

重现步骤