Unable to update column to null.

[ivanbolcina]

If using impl_update and updating some column to null, and that column currently has some value in database, then impl_update simply ignores this value.

so it is not possible to do this with impl_update:

update TABLE1 set COLUMN1='test', COLUMN2=NULL where ID=10

The problem is in this line

#[$crate::py_sql("update ${table_name} set
trim ',':
for k,v in table:
if k == column || v== null:
continue:
${k}=#{v},
",$sql_where)]

Please provide an option to update all columns to impl_update macro or provide another macro that does this or a macro that receives whole update statement.