Joined feature class with table from same file geodatabase executes without errors, but the joined fields are all null. The fields that are being attempted to join are both type "text" and length 20.
The behavior is no longer reproducible at ArcGIS Pro 3.1 and newer.
解决办法
If calculating a text field with values from a number field, it works but those values in the new text field can not be found when performing a join and can not be found by the select by attributes tool. Rcalculating the field using str(!fieldname!) does not fix the problem. If deleting and re-creating the field and calculate the numbers into the text field as a string using the str() function the first time, there are no search or join issues with the field