F807086521 Msewtz Apex Tabular Forms

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APEX 4.0 New Features – Enhanced Tabular FormsMarc Sewtz | Software Development Manager | Oracle Application ExpressOracle USA Inc.520 Madison Avenue, New York, NY [email protected]

The following is intended to outline Oracle’s general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions.The development, release, and timing of any features or functionality described for Oracle’s products remain at the sole discretion of Oracle.

Agenda

• Oracle APEX 4.0 - Overview

• Tabular Forms and Master-Detail Forms

• Tabular Form Enhancements in Oracle APEX 4.0

Oracle APEX 4.0Overview

Easy to develop • Easy to deploy • Easy to manage

Oracle Application Express Overview

• Unique Rapid Application Development (RAD) tool for the Oracle Database

• Browser based for Development, Deployment and Use

• Allows to declaratively build professional Web 2.0 applications that are fast and secure

• Leverages full Oracle database capabilities and existing SQL & PL/SQL skills

• Standard component of the database

• Fully supported, “no-cost” option with all editions of the Oracle Database

Data-driven ApplicationsDevelop opportunistic and departmental productivity applications

Online ReportingBuild SQL-based reporting applications on existing database schemas

Access ReplacementConsolidate outgrown Access applications to the Oracle database with an APEX Web front end

Spreadsheet Web-ificationConvert spreadsheets to Web applications where they can be concurrently viewed and edited

Oracle Forms Modernization

Leverage SQL & PL/SQL declarative programming skills to move Forms applications to HTML / Web 2.0

Oracle APEX – Typical Use Cases

Tabular Forms and Master-Detail Forms

Oracle APEX 4.0 – Tabular Forms

• Create, Update, Delete Operations on multiple records

• Built-In automatic DML processes

• Customization using public PL/SQL APIs


• Wizard-generated Tabular Forms• Based on Table or View• Tabular Form region source is a SQL query• Multi-Row Update process references schema, table and

primary key column(s) • New rows identified by having primary key values be NULL

• Delete Rows process deletes checked rows based on row number and corresponding primary key value(s)

• Add Rows: In APEX 4.0, the add row functionality is implemented on the client via JavaScript, i.e. add-row process and additional MRU process, which was called when adding rows on the server, are no longer needed


• Generated tabular form defaults:• Sorting & AJAX pagination enabled by default• Row Selector for multi-row delete, using “Delete” button• “Submit” button to submit form to database• “Add Row” button for adding one or more additional rows


• Column Display-Types• Display as Text (Standard Report Column)• Display as Text (based on LOV)• Display as Text (saves state / escape special characters)• Text Field• Text Area• Date Picker *) & Date Picker Classic• Select List• Radio Group *)

• Popup LOV and Popup Key LOV *)

• Simple Checkbox *)

• Hidden*) new display types introduces in APEX 4.0


• Optimistic Locking• Preventing lost updates, i.e. updating data modified by other users• Checksum on column data computed when rendering tabular form• Checksums stored in tabular forms page using hidden items• Checksums compared with current data in database on submit• Any mismatches cause update to be rejected


• Creating Tabular Forms with the Create Application Wizard• Create Application Wizard includes Tabular Form and

Master-Detail Form Page Types• Simplified interface requiring certain criteria to be met:

• Tables must of primary keys defined• Primary keys populated through triggers• For master-detail, foreign key constrains required

• Customization options for column headings, display types, etc in popup page edit window

• Fully customizable after application is created


• Creating Tabular Forms with the Create Page Wizard• Build tabular forms on tables and views, additional options:

• Choose allowed operations• Selecting display-only and updateable columns• Selecting primary key column and source


• Master-Detail Forms with the Create Page Wizard• Build Master-Detail forms on related and unrelated tables• Choose display-only and updateable columns• Choose primary-key column(s) and primary key source• Foreign-Key relationship derived from constrains - if defined• For new rows, detail rows foreign key column populated with

master row’s primary key value(s)• Choice of two- and three-page master-detail forms

• Two-Page: Detail Rows shown in Tabular Form• Three-Page: Detail Rows shown as report with links to

single-record forms


• Master-Detail Forms

D E M O N S T R A T I O N

Tabular Forms

Customizing Tabular Forms

Oracle APEX 4.0 – Customizing Tabular Forms

• Report Column Attributes


• Report Column Attributes• Changing Display-Types• Using Date and Number Format Masks• Excluding Columns vs. Hidden Columns• List of Values• Using Defaults


• Custom Tabular Forms• APEX_ITEM PL/SQL API

• Use in SQL source query to render columns as form items• Provides control over use of tabular form item arrays

• APEX_ITEM vs. Built-In Display Types• Using Built-In Display types provides better performance with

long result sets, because calls to underlying APEX_ITEM API limited to rows shown on current age

• Modifying the tabular form source query • Source query customizable, but caution should be taken• Joins possible, but only one table updateable

• Manual Tabular Form validations and processes can be implemented using apex_application.f_xx arrays


Tabular Form Customizations


Tabular Forms - New Features

Oracle APEX 4.0 – Tabular Forms New Features

• Declarative Validations• Tabular Form / Column Validations can be created using the

same declarative wizards used for standard page items• Standard validation types available, including Not-Null, Is-Date,

Column value equal to Expression, etc• Customizable error message with #COLUMN_HEADER#

substitution• Validations executed on submit• Failed column values highlighted and error messages shown on

top of page along with link to field• Data entered by user prior to submit is recovered, i.e. no

changes are lost


• Radio-Groups• New LOV based item type• Works similar to select lists• Allows selecting one value per column for each record• Implementation using array of hidden items, radio groups

disabled on submit and hidden values submitted to server


• Popup-Key LOV• New LOV based item type• Similar to existing popup-key LOVs, however display values

shown in report instead of return values• Return values stored and submitted using array of hidden fields


• Simple Checkbox• Easy to use checkbox display type• Based on one- or two-value LOV• When using LOV with one value, this value is submitted

when checkbox is checked, otherwise NULL• When using LOV with two values, the first value is submitted

when checkbox is checked, otherwise second value• Full array of values submitted to server, i.e.

apex_application.g_fxx array contains elements for each row, nor just those checked

• Implementation using array of hidden items, checkboxes disabled on submit and hidden values submitted to server


• Other new tabular form features• LOV based sorting

• Columns using LOV based display types now sorted by display value, rather than return value

• FMAP array• Additional array of hidden fields included on tabular form

pages, used to map arrays to underlying table columns• Highlighting of unsaved changes

• Paginating to subsequent or previous rows in a tabular form does not save any changes, however the user is now prompted whether or not to discard any unsaved changes and updated fields are highlighted

• Tabular form JavaScript code moved into APEX JavaScript libraries, no longer rendered on page


Tabular FormsNew Features

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Information:

http://otn.oracle.com/apex

Hosted Development:

http://apex.oracle.com

© 2008 Oracle Corporation – Proprietary

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