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Define() establishes specific data definitions. This involves defining columns/fields and creating the tables/files with optional indexes.
Below is the code for Define():
/*
* Define()
*
* Create the tables
*/
void Define(void)
{
CTSQLRET rc;
printf("DEFINE\n");
/* delete tables... */
Delete_Tables();
/* ...and re-create them with constraints */
Create_CustomerMaster_Table();
Create_CustomerOrders_Table();
Create_OrderItems_Table();
Create_ItemMaster_Table();
if ((rc = ctsqlCommit(hConn)) != CTSQLRET_OK)
Handle_Error("ctsqlCommit()");
}
/*
* Create_CustomerMaster_Table()
*
* Create the table CustomerMaster
*/
void Create_CustomerMaster_Table(void)
{
CTSQLRET rc;
/* define table CustomerMaster */
printf("\ttable CustomerMaster\n");
if ((rc = ctsqlExecuteDirect(hCmd,
CT_STRING_LITERAL("CREATE TABLE custmast ( \
cm_custnumb CHAR(4) PRIMARY KEY, \
cm_custzipc CHAR(9), \
cm_custstat CHAR(2), \
cm_custrtng CHAR(1), \
cm_custname VARCHAR(47), \
cm_custaddr VARCHAR(47), \
cm_custcity VARCHAR(47))")
)) != CTSQLRET_OK)
Handle_Error("ctsqlExecuteDirect(CREATE TABLE)");
}
/*
* Create_CustomerOrders_Table()
*
* Create the table CustomerOrders
*/
void Create_CustomerOrders_Table(void)
{
CTSQLRET rc;
/* define table CustomerOrders */
printf("\ttable CustomerOrders\n");
if ((rc = ctsqlExecuteDirect(hCmd,
CT_STRING_LITERAL("CREATE TABLE custordr ( \
co_ordrdate DATE, \
co_promdate DATE, \
co_ordrnumb CHAR(6) PRIMARY KEY, \
co_custnumb CHAR(4), \
FOREIGN KEY (co_custnumb) REFERENCES custmast)")
)) != CTSQLRET_OK)
Handle_Error("ctsqlExecuteDirect(CREATE TABLE)");
}
/*
* Create_OrderItems_Table()
*
* Create the table OrderItems
*/
void Create_OrderItems_Table(void)
{
CTSQLRET rc;
/* define table OrderItems */
printf("\ttable OrderItems\n");
if ((rc = ctsqlExecuteDirect(hCmd,
CT_STRING_LITERAL("CREATE TABLE ordritem ( \
oi_sequnumb SMALLINT, \
oi_quantity SMALLINT, \
oi_ordrnumb CHAR(6), \
oi_itemnumb CHAR(5), \
FOREIGN KEY (oi_itemnumb) REFERENCES itemmast, \
FOREIGN KEY (oi_ordrnumb) REFERENCES custordr)")
)) != CTSQLRET_OK)
Handle_Error("ctsqlExecuteDirect(CREATE TABLE)");
}
/*
* Create_ItemMaster_Table()
*
* Create the table ItemMaster
*/
void Create_ItemMaster_Table(void)
{
CTSQLRET rc;
/* define table ItemMaster */
printf("\ttable ItemMaster\n");
if ((rc = ctsqlExecuteDirect(hCmd,
CT_STRING_LITERAL("CREATE TABLE itemmast ( \
im_itemwght INTEGER, \
im_itempric MONEY, \
im_itemnumb CHAR(5) PRIMARY KEY, \
im_itemdesc VARCHAR(47))")
)) != CTSQLRET_OK)
Handle_Error("ctsqlExecuteDirect(CREATE TABLE)");
}
