Expand functionality of null indicator in API
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Key: CORE-5483
URL: http://tracker.firebirdsql.org/browse/CORE-5483
Project: Firebird Core
Issue Type: Improvement
Components: API / Client Library
Reporter: Dimitry Sibiryakov
Currently in input SQLDA/messsage null indicator can have two meaningful
values: 0 for not null data and -1 for null indication.
It would be useful to add more:
1) A value indicating "set field to default", which is API support for
CORE-5449.
2) A value with meaning "do not change value of field" which is effectively the
same as (1) for inserts and for updates would leave current value as is instead
of resetting it to default or provided value.
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