Steps to create a custom table

You can create a custom table.

1. Copy the install_dir/repository/entity/extensions/Extensions.xml.sample file as install_dir/extensions/global/entities/your_filename.xml file OR modify your existing extension XML file. For example, assume that ABC_CUSTOMER_ORDER_LINE is a custom table.
2. Edit the your_filename.xml file to create custom tables as shown in the following example. For a description of the XML attributes, see the table that follows the example.

   <DBSchema> 
     <Entities> 
        <Entity ApiNeeded="Y/N" AuditRequired="Y" Description="" 
         XMLName="OPTIONAL" Name="OPTIONAL" HasHistory="Y/N" Prefix="ABC" 
         TableName="ABC_CUSTOMER_ORDER_LINE" KeyType="Random" > 
         <!-- table columns --> 
         <Attributes> 
            <Attribute ColumnName="CREATETS" DataType="TimeStamp"  
              DefaultValue="sysdate" Description="Create TimeStamp" /> 
            <Attribute ColumnName="MODIFYTS" DataType="TimeStamp" 
              DefaultValue="sysdate" Description="Modify TimeStamp" /> 
            <Attribute ColumnName="CREATEUSERID" DataType="UserId" 
              DefaultValue="&apos; &apos;" Description="Creating User ID" /> 
            <Attribute ColumnName="MODIFYUSERID" DataType="UserId" 
              DefaultValue="&apos; &apos;" Description="Modifying User ID" /> 
            <Attribute ColumnName="CREATEPROGID" DataType="ProgramID" 
              DefaultValue="&apos; &apos;" Description="Creating Program ID" /> 
            <Attribute ColumnName="MODIFYPROGID" DataType="ProgramID" 
              DefaultValue="&apos; &apos;" Description="Modifying Program ID" /> 
            <Attribute ColumnName="LOCKID" DataType="Lockid" 
              DefaultValue="0" Description="Lock ID" /> 
            <Attribute ColumnName="TABLE_KEY" DataType="Key" DefaultValue=" " 
              Description="" Nullable="True/False" XMLName="TableKey" />        
            . 
             . 
         </Attributes> 
         <!-- PrimaryKey is a mandatory attribute in entity definition. 
           This element can have ONLY ONE attribute element --> 
         <PrimaryKey Name="TABLE_NAME_PK"> 
              <Attribute ColumnName="TABLE_KEY" /> 
         </PrimaryKey> 
         <!-- Indices --> 
         <Indices> 
             <Index Name="INDEX_I1" Unique="True/False"> 
                 <Column Name="Attribute2" /> 
                 . 
                 . 
              </Index> 
              . 
              . 
          </Indices> 
          <!-- Relationship --> 
          <Parent ParentTableName="YFS_ORDER_LINE" XMLName="YFSOrderLine" > 
          <Attribute ColumnName="CUSTOM_ORDER_KEY" 
            ParentColumnName="ORDER_LINE_KEY" /> 
          . 
          . 
          </Parent> 
          <!-- ForeignKeys --> 
          <ForeignKeys> 
            <ForeignKey ParentTableName="PARENT_ORDER_LINE" 
              XMLName="PARENTName1" > 
                <Attribute ColumnName="CUSTOM_ORDER_KEY" 
                  ParentColumnName="PARENT_COLUMN_KEY" /> 
                . 
                . 
            </ForeignKey> 
            . 
            . 
          </ForeignKeys> 
          <!-- AuditReferences --> 
          <AuditReferences> 
            <Reference ColumnName="TABLE_KEY" /> 
             . 
             . 
          </AuditReferences> 
      </Entity> 
     </Entities> 
   </DBSchema>

   Notes:

   • If TableName is specified using a non-ASCII character set, the attributes XMLName and Name are required for this table/entity.
   • If ColumnName is specified using a non-ASCII character set, the attributes XMLName and Name are required for this column/attribute.
3. The following table explain the attributes in the entity XML:

   Attribute	Description
   Entity
   ApiNeeded	Indicate whether or not APIs should be generated. Valid values are Y or N. A default set of APIs are generated if Y is passed. For example in the ABC_CUSTOMER_ORDER_LINE tables, the application creates the following APIs when the database extension jar file is generated: getABCCustomerOrderLine() getABCCustomerOrderLineList() createABCCustomerOrderLine() changeABCCustomerOrderLine() deleteABCCustomerOrderLine() These APIs can be accessed as services using the Service Definition Framework.
   AuditRequired	If set to Y, an audit record for this entity is created.
   HasHistory	This flag indicates whether the custom table can have a history table associated with it. The default value is N. If the flag is set to Y, the appropriate scripts for generating database scripts for creating and altering the history table is generated by dbverify. For a custom table, the HasHistory flag must be set to Y for generating history tables. However, if a Parent relationship is defined in the entity XML, this flag is copied from the parent table definition, and all child entities cannot override this flag.
   Prefix	The prefix added to your custom tables. It is recommended that you do not use a prefix starting with Y.
   TableName	The name given to your custom table.
   KeyType	Optional. The valid value is Random. When the value is set to Random, the logic used to generate primary keys for the table results in random primary keys rather than sequential primary keys being generated. That is, when KeyType=”Random”, two random digits are included in the primary keys. For example, the format of generated primary keys is YYYYMMDDHHRRMM(SS)NNNNNNNN, where RR represents the two random digits.
   Entity/Attributes/Attribute
   ColumnName	The names of the column that comprise the table.
   DataType	The data type of the column. Valid data types are given in the install_dir/repository/datatypes/datatypes.xml file. Note: BLOB datatype is not supported.
   CompressionSupported	Optional. Attribute used to indicate whether or not the data compression is supported for this column. Valid values are True or False. If True compression support is enabled. Note: If the data inserted into a column has both CompressionSupported and UseCompression attributes set to True, then this attribute should not be set back to False. Doing so would result in all compressed data being retrieved without any decompression.
   UseCompression	Optional. Attribute used to compress data for this column. Valid values are True or False. If True data is compressed. Note: The value of this attribute should be set to True only if the CompressionSupported attribute is set to True.
   QueryAllowed	Optional. Attribute used to enable a compressible column to be used for queries in a List API. Valid values are True or False. If True the column can be used for queries in the List APIs. Note: If the value of the CompressionSupported attribute is set to true then the value of this attribute should also be set to True.
   DefaultValue	Default value for the column.
   Description	A description of the columns that could be used in the Javadoc or ERD.
   Nullable	Optional. Attribute used to describe the nullable value of a field. Default is false. Nullable=true is allowed for all columns except Primary Key Attributes and Entity Relationships.
   XMLName	Optional. XML name of the attribute, if it is different from the name of the attribute. Note: If ColumnName is specified using a non-ASCII character set, this attribute is required. Choose a name that does not conflict with the base extension. It is recommended that you use Extn as a prefix. It is also strongly recommended that you use the same convention for arriving at the XMLName as the base product does: Make each letter following the underscore in the column name upper case, and the rest lower case. Then, remove the underscores. Thus, Extn_Item_Id should be: ExtnItemId.
   Name	Mandatory. The name of the database class.
   Entity/PrimaryKey
   Name	Name of the unique index created for the primary key. Note: The name of the primary key in the extension XML should end with _PK.
   ColumnName	The name of the table column that is identified as the primary key.
   Entity/Indices/Index
   Name	The index name. This value cannot exceed 18 characters.
   Unique	This key is present only for custom entities. Valid values are True or False. If True a unique index is created.
   AllowCompressedColumns	Optional. If True, the index is allowed to contain columns marked with CompressionSupported attribute set to True.
   Column/ Name	The table column name associated with the index.
   Entity/Parent
   ParentTableName	Name of the other table this entity has foreign key relationship.
   XMLName	The XML name of the parent attribute. It should start with the prefix mentioned in the parent table. By default the parent table name is assumed.
   Parent/Attribute Level
   ParentColumnName	Column name in the parent table. Note: To create relationships among entities, the data type of parent column must be of type CHAR or VARCHAR.
   ColumnName	Column name in this custom entity.
   Entity/ForeignKeys/ForeignKey
   ParentTableName	The name of the table with which the entity has a foreign key relationship.
   XMLName	XML representation of the element name. By default the parent table name is assumed.
   Entity/ForeignKeys/ForeignKey/Attribute
   ParentColumnName	Column name of the parent table. Note: To create foreign keys among entities, the data type of parent column must be of type CHAR or VARCHAR.
   ColumnName	Column name in this custom entity.
   Entity/AuditReferences/Reference
   ColumnName	Reference Column name in the audit table.

   Note: In entity definition, relationship can be defined under Parent and ForeignKey elements.
4. The relationship defined under the ForeignKey element indicates:
   1. If the foreign table is an application database table, for a single record in the foreign table, zero or many records in this custom table may exist.
   2. This is a read-only relationship, hence deletion of a record from the foreign table does not result in the deletion of a matching record from this custom table.
5. The relationship defined under the Parent element indicates:
   1. For a single record in the parent table, multiple child records may exist.
   2. Deletion of a record from the parent table results in the deletion of matching records from the child table, if any.
6. Extend the corresponding API templates (for example, getOrderDetails()API) by following the instructions in Extending API Templates.
   Note: The APIs generated by the application for the custom tables can be invoked as a service and through a multiAPI wrapper component.
7. Build and deploy your extensions.