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- 1 Version 4.0 -- 5/1/89 bcp_control
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- NAME: bcp_control
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- FUNCTION:
- Change various control parameter default settings.
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- SYNTAX:
- RETCODE bcp_control(dbproc, field, value)
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- DBPROCESS *dbproc;
- int field;
- DBINT value;
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- bcp_control Version 4.0 -- 5/1/89 2
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- COMMENTS:
-
- o This function sets various control parameters for bulk copy
- operations, including the number of errors allowed before
- aborting a bulk copy, the numbers of the first and last rows to
- copy, and the batch size.
- o These control parameters are only meaningful when copying
- between a host file and a SQL Server table. Control parameter
- settings have no effect on bcp_bind() row transfers.
-
- o The following program fragment illustrates bcp_control():
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- LOGINREC *login;
- DBPROCESS *dbproc;
- DBINT rowsread;
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- /* Initialize DB-Library. */
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- if (dbinit() == FAIL)
- exit(ERREXIT);
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- /* Install error-handler and message-handler. */
- dberrhandle(err_handler);
- dbmsghandle(msg_handler);
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- /* Open a DBPROCESS. */
- login = dblogin();
- BCP_SETL(login, TRUE);
- dbproc = dbopen(login, NULL);
-
- /* Initialize bcp. */
- if (bcp_init(dbproc, "comdb..address", "address.add", "addr.error", DB_IN) == FAIL)
- exit(ERREXIT);
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- /* Set the number of rows per batch. */
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- if (bcp_control(dbproc, BCPBATCH, 1000) == FAIL)
- {
- printf("bcp_control failed to set batching behavior.\n");
- exit(ERREXIT);
- }
-
- /* Set host column count. */
- if (bcp_columns(dbproc, 1) == FAIL)
- {
- printf("bcp_columns failed.\n");
- exit(ERREXIT);
- }
-
- /* Set the host-file format. */
- if (bcp_colfmt(dbproc, 1, 0, 0, -1, (BYTE *)("\n"), 1, 1) == FAIL)
- {
- printf("bcp_colformat failed.\n");
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- exit(ERREXIT);
- }
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- /* Now, execute the bulk copy. */
- if (bcp_exec(dbproc, &rowsread) == FAIL)
- {
- printf("Incomplete bulk copy. Only %ld row%c copied.\n",
- rowsread, (rowsread == 1) ? ' ': 's');
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- exit(ERREXIT);
- }
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- o For information on the bcp utility program, see its manual page
- in the Commands Reference.
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- PARAMETERS:
- dbproc - A pointer to the DBPROCESS structure that provides the
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- connection for a particular front-end/SQL Server process. It
- contains all the information that DB-Library uses to manage
- communications and data between the front end and SQL Server.
- field - The field can be one of the following:
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- Field Description
- BCPMAXERRS The number of errors allowed before giving up. The
- default is 10.
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- BCPFIRST The first row to copy. The default is 1. A value of
- less than 1 resets this field to its default value of 1.
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- BCPLAST The last row to copy. The default is to copy all rows.
- A value less than 1 resets this field to its default value.
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- BCPBATCH The number of rows per batch. The default is 0, which
- means that the entire bulk copy will be done in one
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- batch. This field is only meaningful when copying from
- a host file into SQL Server.
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- value - The value for the specified field.
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- RETURNS:
- SUCCEED or FAIL.
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- SEE ALSO:
- bcp_batch, bcp_bind, bcp_colfmt, bcp_collen, bcp_colptr,
- bcp_columns, bcp_done, bcp_exec, bcp_init
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