Long data: Use of SQL_LEN_DATA_AT_EXEC(0) and SQL_DATA_AT_EXEC

Hello,
What is the use of SQL_LEN_DATA_AT_EXEC(0) and what does it mean ?
I know that when StrLen_or_IndPtr buffer
pointer of SQLBindParameter is set to SQL_LEN_DATA_AT_EXEC or SQL_DATA_AT_EXEC
it means that the data for the parameter will be sent with SQLPutData. Also SQL_LEN_DATA_AT_EXEC(length)
is used when sending long data to a data source that needs to know how many bytes of long data will be sent so that it can preallocate space
But what should be the expected behavior when we set StrLen_or_IndPtr buffer
to:
1) SQL_LEN_DATA_AT_EXEC(0)
or 2) SQL_DATA_AT_EXEC
Thanks
Mukesh

Hi Elvis,
Thanks for reply!
But my question is what should be the expected behavior when we set StrLen_or_IndPtr buffer
to:
1) SQL_LEN_DATA_AT_EXEC(0)
or 2) SQL_DATA_AT_EXEC
I think it should insert all data using SQLPutaData limited by the length of columns size.
MSDN is silent in the case of SQL_LEN_DATA_AT_EXEC(0)
Thanks,
Mukesh

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Long data: Use of SQL_LEN_DATA_AT_EXEC(0) and SQL_DATA_AT_EXEC

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