srv_paramdata

Returns the value of a remote stored procedure call parameter.

Important  This Open Data Services function or macro is only supported in Microsoft® SQL Server™ 2000 for backward compatibility.

For more information about Open Data Services functions or macros supported for backward compatibility, see Open Data Services (Level 3).

Syntax

void * srv_paramdata ( SRV_PROC * srvproc,
int n );

Arguments

srvproc

Is a pointer to the SRV_PROC structure that is the handle for a particular client connection (in this case, the handle that received the remote stored procedure call). The structure contains information the ODS Library uses to manage communication and data between the Open Data Services server application and the client.

n

Is the number of the parameter. The first parameter is number 1.

Returns

A pointer to the parameter value. If the nth parameter is NULL, there is no nth parameter, or there is no remote stored procedure, returns NULL. If the parameter value is a string, it might not be null-terminated. Use srv_paramlen to determine the length of the string.

This function returns the following values, if the parameter is one of the SQL Server data types. Pointer data includes whether the pointer for the data type is valid (VP), NULL, or not applicable (N/A), and the contents of the data pointed to.

New data types	Input data length
	NULL	ZERO	>=255	<255
BITN	VP NULL	VP NULL	N/A	N/A
BIGVARCHAR	NULL N/A	VP NULL	VP 255 chars*	VP actual data
BIGCHAR	NULL N/A	VP 255 spaces	VP 255 chars*	VP actual data + padding (up to 255)
BIGBINARY	NULL N/A	VP 255 0x00	VP 255 bytes	VP actual data + padding (up to 255)
BIGVARBINARY	NULL N/A	VP 0x00	VP 255 bytes	VP actual data
NCHAR	NULL N/A	VP 255 spaces	VP 255 chars*	VP actual data + padding (up to 255)
NVARCHAR	NULL N/A	VP NULL	VP 255 chars*	VP actual data
NTEXT	N/A	N/A	N/A	N/A

*    data is not null-terminated; no warning is issued on truncation for data >255 characters.

Remarks

If you know the parameter name, you can use srv_paramnumber to get the parameter number. To determine whether a parameter is NULL, use srv_paramlen.

When a remote stored procedure call is made with parameters, the parameters can be passed by name or by position (unnamed). If the remote stored procedure call is made with some parameters passed by name and some passed by position, an error occurs. If an error occurs, the SRV_RPC handler is still called, but it appears as if there were no parameters and srv_rpcparams returns 0.

See Also

srv_rpcparams