DataBlade API Programmer's Manual Chapter 12: DataBlade API Function Descriptions

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mi_integer mi_value_by_name(row, column_name, retbuf, retlen)

		MI_ROW *row;

		char *column;

		MI_DATUM *retbuf;

		mi_integer *retlen; 


row
is the row from which values are being extracted.

column
is name of the column for which the value is to be returned.

retbuf
is a pointer to a location in the user space that will be set to the address of a buffer that contains the returned value. The buffer is allocated within the mi_value() call. The user does not need to supply the buffer to hold the returned value.
The pointer returned in retbuf is valid until a new mi_exec() function is run or until the statement is dropped via mi_drop_prepared_statement(). If you need to save the data for later use, copy the data to which retbuf points into a variable that you have defined.

retlen
is the length of the returned element.





 



Valid in Client Application?

Valid in Server Routine?

Yes
Yes