I have a huge point vector data (around 3 million point; in a gdb) with attributes and I have table (created with Near analysis.). I want to copy one of the field values to data. So I joined the table and tried the field calculator to do the trick, but after 16 hours I realized it just froze (it worked with similar data). So the next that could work I think is the UpdateCursor. Unfortunately I got an Error: "TypeError: cannot update join table"
field1 = '!temp_Features.leftd!' field2 = '!leftt:NEAR_DIST!'
cursor = arcpy.da.UpdateCursor("layer2",(field1,field2))
fields = ['temp_Features:leftd', 'leftt:NEAR_DIST']
cursor = arcpy.da.UpdateCursor("layer2",fields)
Same error every time.
(I have ArcGIS with advanced license)