If the indexed field supports null values, one additional byte is used in the index key.

>I have a table with a field c(240). When I create an index for this field in this table, everything works as expected.
>But when I try to create an index in a CursorAdapter (same table structure) I receive an error 112 - Invalid key length.
>If I change the field length to 239 (in the CursorAdapter), create index works as expected.
>What is happening? What's the difference between a table and a cursor created by a CA?