Oracle Object FeaturesIn Forms

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Objectives

• Identify which object types are supported• Describe how object types are

represented within Form Builder• Create a block based on an object table• Create a block based on a relation table

with an object or an REF column• Populate a REF column with an LOV

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What is an Object Type?

interest

Close

withdraw

Check status

Attributes

Methods

ACCOUNTAc_no

Ac_typeDeposit

Open_date

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Overview on Objects

• Object tables• Object columns• Object views• REF Columns

REF

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Oracle 8i Features in Forms

Supported Oracle8i features• Large Objects: BLOB, CLOB, NCLOB, BFILE• User-defined objects

– Object table– Column object– REF column

Unsupported Oracle8i features• Collection types• Stored procedures that return object values

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How Form Treats Objects

Object_B

Attr_B1

Attr_B2

Attr_A3

Nested Objects

Attr_A1

Attr_A2

Object_A

Attr_A1

Object_A

Attr_A3

Attr_A2_B1

Attr_A2_B2

Items in a Form

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Creating Data Blocks

• Blocks based on object tables• Blocks based on object columns• Blocks with REF Lookups

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Block Based on Object Tables

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Block Based on Object Columns

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Blocks with REF Lookups

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Using REF Lookup Value

Select REF attribute columns: This causes the columns to appear as data items at run-time.Select the REF item itself: • This causes the item to be placed on a Null canvas.• The item does not appear at run time.• The item is available for coding purposes.

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LOVs for REFs

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Summary

• Identify supported Oracle8i object types• Define data blocks based on object tables• Define data blocks based on tables

with object columns or REF columns• Populate REF columns with an LOV

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