SQLite in Adobe AIR

SQLite in Adobe AIR Peter Elst | May 23th 2008 - 2M08

Why SQLite in Adobe AIR?

Why Koen?

Why SQLite in Adobe AIR?

Why SQLite in Adobe AIR? Embedded SQL Database Engine

Why SQLite in Adobe AIR? Embedded SQL Database Engine Implements most of SQL92

Why SQLite in Adobe AIR? Embedded SQL Database Engine Implements most of SQL92 Light-weight, cross-platform, open source

Why SQLite in Adobe AIR? Embedded SQL Database Engine Implements most of SQL92 Light-weight, cross-platform, open source No setup, conﬁguration or server required

Why SQLite in Adobe AIR? Embedded SQL Database Engine Implements most of SQL92 Light-weight, cross-platform, open source No setup, conﬁguration or server required Each database is contained within a single ﬁle

How do you use it?

How do you use it? 1.Create a File reference

How do you use it? 1.Create a File reference 2.Create an instance of ﬂash.data.SQLConnection and ﬂash.data.SQLStatement

How do you use it? 1.Create a File reference 2.Create an instance of ﬂash.data.SQLConnection and ﬂash.data.SQLStatement 3.Open the database connection

How do you use it? 1.Create a File reference 2.Create an instance of ﬂash.data.SQLConnection and ﬂash.data.SQLStatement 3.Open the database connection 4.Specify the connection and SQL query to run

How do you use it? 1.Create a File reference 2.Create an instance of ﬂash.data.SQLConnection and ﬂash.data.SQLStatement 3.Open the database connection 4.Specify the connection and SQL query to run 5.Run SQLStatement.execute()

How do you use it?

How do you use it? import flash.filesystem.File; import flash.data.*; var dbFile:File = File.applicationStorageDirectory. ↵ resolvePath(quot;contacts.dbquot;);

How do you use it? import flash.filesystem.File; import flash.data.*; var dbFile:File = File.applicationStorageDirectory. ↵ resolvePath(quot;contacts.dbquot;); var sqlConn:SQLConnection = new SQLConnection(); var sqlStatement:SQLStatement = new SQLStatement();

How do you use it? import flash.filesystem.File; import flash.data.*; var dbFile:File = File.applicationStorageDirectory. ↵ resolvePath(quot;contacts.dbquot;); var sqlConn:SQLConnection = new SQLConnection(); var sqlStatement:SQLStatement = new SQLStatement(); sqlConn.open(dbFile);

How do you use it? import flash.filesystem.File; import flash.data.*; var dbFile:File = File.applicationStorageDirectory. ↵ resolvePath(quot;contacts.dbquot;); var sqlConn:SQLConnection = new SQLConnection(); var sqlStatement:SQLStatement = new SQLStatement(); sqlConn.open(dbFile); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contactsquot;;

How do you use it? import flash.filesystem.File; import flash.data.*; var dbFile:File = File.applicationStorageDirectory. ↵ resolvePath(quot;contacts.dbquot;); var sqlConn:SQLConnection = new SQLConnection(); var sqlStatement:SQLStatement = new SQLStatement(); sqlConn.open(dbFile); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contactsquot;; sqlStatement.execute(); var result:Array = sqlStatement.getResult().data;

Synchronous versus Async

Synchronous versus Async Synchronous - blocks application until result is available var sqlConn:SQLConnection = new SQLConnection(); sqlConn.open(dbFile); var result:SQLResult = sqlConn.getResult().result;

Synchronous versus Async Synchronous - blocks application until result is available var sqlConn:SQLConnection = new SQLConnection(); sqlConn.open(dbFile); var result:SQLResult = sqlConn.getResult().result; Asynchronous - uses events and event listeners var sqlConn:SQLConnection = new SQLConnection(); sqlConn.addEventListener(SQLResultEvent.RESULT, onSQLResult); sqlConn.addEventListener(SQLResultEvent.ERROR,onSQLError); sqlConn.openAsync(dbFile);

ﬂash.data.SQLConnection

ﬂash.data.SQLConnection Connects to the database ﬁle

ﬂash.data.SQLConnection Connects to the database ﬁle Provides events for asynchronous use

ﬂash.data.SQLConnection Connects to the database ﬁle Provides events for asynchronous use Schema access

ﬂash.data.SQLStatement

ﬂash.data.SQLStatement Executes a SQL query on the speciﬁed database connection

ﬂash.data.SQLStatement Executes a SQL query on the speciﬁed database connection Provides events for asynchronous use

ﬂash.data.SQLStatement Executes a SQL query on the speciﬁed database connection Provides events for asynchronous use Supports result paging

Storage types

Storage types NULL - NULL value (null)

Storage types NULL - NULL value (null) INTEGER - signed integer (int)

Storage types NULL - NULL value (null) INTEGER - signed integer (int) REAL - ﬂoating point (Number)

Storage types NULL - NULL value (null) INTEGER - signed integer (int) REAL - ﬂoating point (Number) TEXT - UTF16 text string (String)

Storage types NULL - NULL value (null) INTEGER - signed integer (int) REAL - ﬂoating point (Number) TEXT - UTF16 text string (String) BLOB - blob of data

SQLStatement Parameters

SQLStatement Parameters The parameters feature protects your SQL statements from SQL injection var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contacts WHERE id = @IDquot;; sqlStatement.parameters[quot;@IDquot;] = someVariable; sqlStatement.execute();

SQLStatement Parameters The parameters feature protects your SQL statements from SQL injection var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contacts WHERE id = @IDquot;; sqlStatement.parameters[quot;@IDquot;] = someVariable; sqlStatement.execute(); You can use the @ or : character to denote a parameter to be replaced sqlStatement.parameters[quot;:NAMEquot;] = someVariable;

SQLStatement Parameters

SQLStatement Parameters Using the ? character you can have unnamed parameters and an index based array var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contacts WHERE name = ? ↵ AND lastname = ?quot;; sqlStatement.parameters[0] = quot;Peterquot;; sqlStatement.parameters[1] = quot;Elstquot;; sqlStatement.execute();

Result Paging

Result Paging Paging allows you to limit the amount of rows you get returned when doing a select operation var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contactsquot;; sqlStatement.execute(10);

Result Paging Paging allows you to limit the amount of rows you get returned when doing a select operation var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;SELECT * FROM contactsquot;; sqlStatement.execute(10); You can get the next batch of rows returned by calling the next method on the SQLStatement instance sqlStatement.next();

ﬂash.data.SQLResult

ﬂash.data.SQLResult SQLResult.data - array of objects for each row of the result

ﬂash.data.SQLResult SQLResult.data - array of objects for each row of the result SQLResult.complete - returns a boolean indicating whether or not the full result was shown

ﬂash.data.SQLResult SQLResult.data - array of objects for each row of the result SQLResult.complete - returns a boolean indicating whether or not the full result was shown SQLResult.lastInsertRowID - return id for the last row that was inserted

ﬂash.data.SQLResult SQLResult.data - array of objects for each row of the result SQLResult.complete - returns a boolean indicating whether or not the full result was shown SQLResult.lastInsertRowID - return id for the last row that was inserted SQLResult.rowsAffected - number of rows affected by an insert, update or delete operation

Transactions

Transactions Transactions allow multiple SQL statements to run within one write operation to the database

Transactions Transactions allow multiple SQL statements to run within one write operation to the database Much more optimized way of handling large insert operations, allows rollback of the complete transaction if an error occurs

Transactions

Transactions var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;INSERT into contacts VALUES (@NAME, @EMAIL)quot;;

Transactions var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;INSERT into contacts VALUES (@NAME, @EMAIL)quot;; sqlConn.begin();

Transactions var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;INSERT into contacts VALUES (@NAME, @EMAIL)quot;; sqlConn.begin(); for(var i:uint=0; i<contacts.length; i++) { sqlStatement.parameters[quot;@NAMEquot;] = contacts[i].name; sqlStatement.parameters[quot;@EMAILquot;] = contacts[i].email; sqlStatement.execute(); }

Transactions var sqlStatement:SQLStatement = new SQLStatement(); sqlStatement.sqlConnection = sqlConn; sqlStatement.text = quot;INSERT into contacts VALUES (@NAME, @EMAIL)quot;; sqlConn.begin(); for(var i:uint=0; i<contacts.length; i++) { sqlStatement.parameters[quot;@NAMEquot;] = contacts[i].name; sqlStatement.parameters[quot;@EMAILquot;] = contacts[i].email; sqlStatement.execute(); } sqlConn.commit();

Database schema

Database schema Allows you to introspect tables, views, columns, indices, triggers var sqlConn:SQLConnection = new SQLConnection(); sqlConn.open(dbFile); sqlConn.loadSchema(); var result:SQLSchemaResult = sqlConn.getSchemaResult(); var table:SQLTableSchema = result.tables[0]; var column:SQLColumnSchema = table.columns[0]; trace(column.name); // returns name of the first column in the first table

SQLite wrapper classes

SQLite wrapper classes You can use ActionScript 3.0 classes as MXML tags

SQLite wrapper classes You can use ActionScript 3.0 classes as MXML tags SQLite and Query classes <sql:SQLite id=quot;db_connquot; file=quot;contacts.dbquot; open=quot;contacts_query.execute()quot; /> <sql:Query id=quot;contacts_queryquot; connection=quot;{db_conn}quot; sql=quot;SELECT * FROM contactsquot; /> <mx:DataGrid id=quot;contacts_dgquot; dataProvider=quot;{contacts_query.data}quot; />

SQLite synchronisation

SQLite synchronisation Synchronizing an online and ofﬂine SQLite database

SQLite synchronisation Synchronizing an online and ofﬂine SQLite database Different strategies

SQLite synchronisation Synchronizing an online and ofﬂine SQLite database Different strategies Online database overwrites ofﬂine

SQLite synchronisation Synchronizing an online and ofﬂine SQLite database Different strategies Online database overwrites ofﬂine Check timestamp on each row, new overwrites old

Demo time

Demo time Contact Manager

Demo time Contact Manager SQLite Editor

Demo time Contact Manager SQLite Editor YouTube Database

Demo time Contact Manager SQLite Editor YouTube Database HTML/JavaScript + SQLite

SQLite on Mac OSX

Resources

Resources www.adobe.com/devnet/air/

Resources www.adobe.com/devnet/air/ onair.adobe.com

Resources www.adobe.com/devnet/air/ onair.adobe.com www.30onair.com

Resources www.adobe.com/devnet/air/ onair.adobe.com www.30onair.com www.peterelst.com

Resources www.adobe.com/devnet/air/ onair.adobe.com www.30onair.com www.peterelst.com Introduction to SQLite in Adobe AIR

Resources www.adobe.com/devnet/air/ onair.adobe.com www.30onair.com www.peterelst.com Introduction to SQLite in Adobe AIR AIR Badge WordPress plugin

Contact me

Contact me Questions, comments, feedback?

Contact me Questions, comments, feedback? Email: info@peterelst.com Blog: www.peterelst.com Twitter: www.twitter.com/peterelst LinkedIn: www.linkedin.com/in/peterelst

Contact me Questions, comments, feedback? Email: info@peterelst.com Blog: www.peterelst.com Twitter: www.twitter.com/peterelst LinkedIn: www.linkedin.com/in/peterelst Thanks and enjoy the rest of the day!

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SQLite in Adobe AIR

by Peter Elst on May 23, 2008

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SQLite in Adobe AIR — Presentation Transcript