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Extended SQLite functionality for Android

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README.md

SQLiteProvider

A simplification of database access.

SQLiteProvider implements a ContentProvider for you that allows database access using Uri's

Download

Download the latest JAR or grab via

Gradle:

dependencies {
    compile 'com.novoda:sqliteprovider-core:1.0.1'
}

Maven:

<dependency>
   <groupId>com.novoda</groupId>
   <artifactId>sqliteprovider-core</artifactId>
   <version>1.0.1</version>
</dependency>

You will need to declare the Novoda repository:

Gradle:

buildscript {
    repositories {
        maven {
            url "http://ci.novoda.com/maven/releases/"
        }
    }
}

Maven:

<repositories>
    <repository>
      <id>public-mvn-repo-releases</id>
      <url>http://ci.novoda.com/maven/releases/</url>
    </repository>
</repositories>

Check the WIKI for further instruction

Usage

Simple example source code can be found in this demo module: Android Simple Demo

Advanced queries & source code can be found in this demo module: Android Extended Demo

Overview

The library is meant to augment the ContentProvider interface to fit SQLite in a more pronounced way. The aim is to set convention on queries via URI.

The following Uris are possible (some may not be supported yet):

General Uri by convention

Generic table support:

Uri: content://<authority>/tableName
Sql: select * from "tableName"

Primary key support:

Uri: content://<authority>/tableName/1
Sql: select * from "tableName" where _id=1

One to many support:

Uri: content://<authority>/tableName/1/child
Sql: select * from "child" where tableName_id=1

Group by & having support:

Uri: content://<authority>/tableName?groupBy=col&having=value
Sql: select * from tableName group by col having value

limit support:

Uri: content://<authority>/tableName?limit=number
Sql: select * from tableName limit number

distinct support:

Uri: content://<authority>/tableName?distinct=true
Sql: select distinct * from tableName limit number

join support (TODO):

Uri: content://<authority>/parent/1/child/2
Sql: select * from child inner join parent on parent._id=child.parent_id;

Info Uri

Gives the ability to query information from the table SQLITE_MASTER and versionning.

content://<authority>/_info

Querying the above will yield the following cursor:

type TEXT | name TEXT | tbl_name TEXT | rootpage INTEGER | sql TEXT

If you are interested to only get the table name, the following should be helpful:

getContentResolver().query(Uri.parse("content://<authority>/_info"), new String[] {"name"}, null, null, null);

To get the current version of the database similar to "select sqlite_version() AS sqlite_version":

content://<authority>/_info?version

returns the following cursor:

sqlite_version TEXT

Size management

Executing some file resizing using vacuum

content://<authority>/_vacuum

(TODO) set max size??

Pragma Uris

Ability to execute Pragma calls against SQLite. This is handy to get further info on table or set values such as "PRAGMA synchronous=OFF"

content://<authority>/_pragma?<pragma_name>=<value>

For instance the following will exectute "PRAGMA synchronous=OFF"

content://<authority>/_pragma?synchronous=OFF

The following will give back table information for a specific table:

content://<authority>/_pragma?table_info("tableName")

The resulting cursor is

column name | data type | can be NULL? | the default value for the column

Table creation

If you insert against

content://<authority>/_db?create=<tableName>&withId=<true|false>&foreignKey=[<comma_separated_list_of_parent_tables>]&createdAt=false&updatedAt=false

(TODO) alter?

tableName (mandatory): the table name
withId (optional): automatically add "_id PRIMARY KEY AUTOINCREMENT" - default is true
foreignKey (optional): automatically add <fk_name>_id as foreign key to table creation
createdAt (optional): will put a createdAt field which contains creation date - default to insert
updatedAt (optional): will put a updatedAt field which contains update date - default to insert

you should have content values put with "column name" mapped to a SQLite type (look at SQLiteType)

Uri uri = Uri.parse("content://authority/_db?create=table");
ContentValues values = new ContentValues();
values.put("name", "TEXT");
values.put("rid", "INTEGER");
getContentResolver().insert(uri, values);

License

(c) Copyright 2014 Novoda

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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