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bcp_colptr

Sets the program variable data address for the current copy into SQL Server.


RETCODE bcp_colptr (
        HDBC hdbc,
        LPCBYTE pData,
        INT idxServerCol);

hdbc

Is the bulk copy-enabled ODBC connection handle.

pData

Is a pointer to the data to copy. If the bound data type is large value type (such as SQLTEXT or SQLIMAGE), pData can be NULL. A NULL pData indicates long data values will be sent to SQL Server in chunks using bcp_moretext.

If pData is set to NULL and the column corresponding to the bound field is not a large value type, bcp_colptr fails.

For more information on large value types, see bcp_bind.

idxServerCol

Is the ordinal position of the column in the database table to which the data is copied. The first column in a table is column 1. The ordinal position of a column is reported by SQLColumns.

SUCCEED or FAIL.

The bcp_colptr function allows you to change the address of source data for a particular column when copying data to SQL Server with bcp_sendrow.

Initially, the pointer to user data is set by a call to bcp_bind. If the program variable data address changes between calls to bcp_sendrow, you can call bcp_colptr to reset the pointer to the data. The next call to bcp_sendrow sends the data addressed by the call to bcp_colptr.

There must be a separate bcp_colptr call for every column in the table whose data address you want to modify.

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