Allow conversion from/to BLOBs and others types in the API functions (XSQLVAR
or blr messages)
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Key: CORE-3446
URL: http://tracker.firebirdsql.org/browse/CORE-3446
Project: Firebird Core
Issue Type: Improvement
Components: API / Client Library, Engine
Reporter: Adriano dos Santos Fernandes
It's allowed to use XSQLVAR (or blr messages) between different types like
number->varchar (or vice-versa) but it's not allowed to use different types
when one of them is a blob.
DSQL moves data using MOVD_move, which do it like a client move. This was ok
before, cause DSQL was not part of the engine and blobs wasn't very integrated
with others types. Now it's very inconsistent.
The proposed change makes possible to move blobs to/from different types in the
execute and fetch calls.
For input parameters, it is specially good as user can put the parameter as
string without need to create and fill a blob from the client side.
For output (execute or fetch), it's good when the application knows it's data
and may describe a blob as a string with its maximum length.
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