Product Documentation

FairCom JDBC

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Define

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

//

private static void Define ()

{

System.out.println("DEFINE");

// delete tables ...

Delete_Tables();

// ...and re-create them with constraints

Create_CustomerMaster_Table();

Create_ItemMaster_Table();

Create_CustomerOrders_Table();

Create_OrderItems_Table();

try

{

conn.commit();

}

catch (SQLException e)

{

Handle_Exception(e);

}

}

//

// Delete_Tables()

//

// This function removes all existing tables

//

private static void Delete_Tables ()

{

try

{

stmt.executeUpdate("DROP TABLE ordritem");

}

catch (SQLException e)

{

Handle_Exception(e);

}

try

{

stmt.executeUpdate("DROP TABLE custordr");

}

catch (SQLException e)

{

Handle_Exception(e);

}

try

{

stmt.executeUpdate("DROP TABLE custmast");

}

catch (SQLException e)

{

Handle_Exception(e);

}

try

{

stmt.executeUpdate("DROP TABLE itemmast");

}

catch (SQLException e)

{

Handle_Exception(e);

}

}

//

// Create_CustomerMaster_Table()

//

// Create the table CustomerMaster

//

private static void Create_CustomerMaster_Table ()

{

// define table CustomerMaster

System.out.println("\ttable CustomerMaster");

try

{

stmt.executeUpdate("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))"

);

}

catch (SQLException e)

{

Handle_Exception(e);

}

}

//

// Create_CustomerOrders_Table()

//

// Create the table CustomerOrders

//

private static void Create_CustomerOrders_Table ()

{

// define table CustomerOrders

System.out.println("\ttable CustomerOrders");

try

{

stmt.executeUpdate("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)"

);

}

catch (SQLException e)

{

Handle_Exception(e);

}

}

//

// Create_OrderItems_Table()

//

// Create the table OrderItems

//

private static void Create_OrderItems_Table ()

{

// define table OrderItems

System.out.println("\ttable OrderItems");

try

{

stmt.executeUpdate("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)"

);

}

catch (SQLException e)

{

Handle_Exception(e);

}

}

//

// Create_ItemMaster_Table()

//

// Create the table ItemMaster

//

private static void Create_ItemMaster_Table ()

{

// define table ItemMaster

System.out.println("\ttable ItemMaster");

try

{

stmt.executeUpdate("CREATE TABLE itemmast (" +

"im_itemwght INTEGER, " +

"im_itempric MONEY, " +

"im_itemnumb CHAR(5) PRIMARY KEY, " +

"im_itemdesc VARCHAR(47))"

);

}

catch (SQLException e)

{

Handle_Exception(e);

}

}

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