With TypeORM
Copy typeORM patch-package from example dir yarn add react-native-quick-sqlite typeorm npx pod-install Enable decorators and configure babel
Low level bindings only
yarn add react-native-quick-sqlite
npx pod-install
Quick SQLite embeds the latest version of SQLite and provides a low-level API to execute SQL queries, uses fast bindings via JSI. By using an embedded SQLite you get access the latest security patches and latest features.
Inspired/compatible with react-native-sqlite-storage and react-native-sqlite2.
Gotchas
- Javascript cannot represent integers larger than 53 bits, be careful when loading data if it came from other systems. Read more.
- It's not possible to use a browser to debug a JSI app, use Flipper (for android Flipper also has SQLite Database explorer).
- Your app will now include C++, you will need to install the NDK on your machine for android.
API
interface QueryResult {
status?: 0 | 1; // 0 for correct execution
insertId?: number;
rowsAffected: number;
message?: string;
rows?: {
/** Raw array with all dataset */
_array: any[];
/** The length of the dataset */
length: number;
};
/**
* Query metadata, available only for select query results
*/
metadata?: ColumnMetadata[];
}
/**
* Column metadata
* Describes some information about columns fetched by the query
* columnDeclaredType - declared column type for this column, when fetched directly from a table or a View resulting from a table column. "UNKNOWN" for dynamic values, like function returned ones.
*/
interface ColumnMetadata = {
columnName: string;
columnDeclaredType: string;
columnIndex: number;
};
interface BatchQueryResult {
status?: 0 | 1;
rowsAffected?: number;
message?: string;
}
interface ISQLite {
open: (dbName: string, location?: string) => { status: 0 | 1 };
close: (dbName: string) => { status: 0 | 1 };
executeSql: (
dbName: string,
query: string,
params: any[] | undefined
) => QueryResult;
asyncExecuteSql: (
dbName: string,
query: string,
params: any[] | undefined,
cb: (res: QueryResult) => void
) => void;
executeSqlBatch: (
dbName: string,
commands: SQLBatchParams[]
) => BatchQueryResult;
asyncExecuteSqlBatch: (
dbName: string,
commands: SQLBatchParams[],
cb: (res: BatchQueryResult) => void
) => void;
loadSqlFile: (dbName: string, location: string) => FileLoadResult;
asyncLoadSqlFile: (
dbName: string,
location: string,
cb: (res: FileLoadResult) => void
) => void;
}Usage
Import as early as possible, auto-installs bindings in a thread-safe manner.
// Thanks to @mrousavy for this installation method, see one example: https://github.com/mrousavy/react-native-mmkv/blob/75b425db530e26cf10c7054308583d03ff01851f/src/createMMKV.ts#L56
import 'react-native-quick-sqlite';
// Afterwards `sqlite` is a globally registered object, so you can directly call it from anywhere in your javascript
const dbOpenResult = sqlite.open('myDatabase', 'databases');
// status === 1, operation failed
if (dbOpenResult.status) {
console.error('Database could not be opened');
}Simple queries
The basic query is synchronous, it will block rendering on large operations, below there are async versions.
let { status, rows } = sqlite.executeSql(
'myDatabase',
'SELECT somevalue FROM sometable'
);
if (!status) {
rows.forEach((row) => {
console.log(row);
});
}
let { status, rowsAffected } = sqlite.executeSql(
'myDatabase',
'UPDATE sometable SET somecolumn = ? where somekey = ?',
[0, 1]
);
if (!status) {
console.log(`Update affected ${rowsAffected} rows`);
}Transactions
Transactions are supported. However, due to the library being opinionated and mostly not throwing errors you need to return a boolean (true for correct execution, false for incorrect execution) to either commit or rollback the transaction.
JSI bindings are fast but there is still some overhead calling executeSql for single queries, if you want to execute a large set of commands as fast as possible you should use the executeSqlBatch method below, it still uses transactions, but only transmits data between JS and native once.
sqlite.transaction('myDatabase', (tx) => {
const {
status,
} = tx.executeSql('UPDATE sometable SET somecolumn = ? where somekey = ?', [
0,
1,
]);
if (status) {
return false;
}
return true;
});Batch operation
Batch execution allows transactional execution of a set of commands
const commands = [
['CREATE TABLE TEST (id integer)'],
['INSERT INTO TABLE TEST (id) VALUES (?)', [1]][
('INSERT INTO TABLE TEST (id) VALUES (?)', [2])
][('INSERT INTO TABLE TEST (id) VALUES (?)', [[3], [4], [5], [6]])],
];
const result = sqlite.executeSqlBatch('myDatabase', commands);
if (!result.status) {
// result.status undefined or 0 === success
console.log(`Batch affected ${result.rowsAffected} rows`);
}Dynamic Column Metadata
In some scenarios, dynamic applications may need to get some metadata information about the returned result set.
This can be done testing the returned data directly, but in some cases may not be enough, for example when data is stored outside sqlite datatypes. When fetching data directly from tables or views linked to table columns, SQLite is able to identify the table declared types:
let { status, metadata } = sqlite.executeSql(
'myDatabase',
'SELECT int_column_1, bol_column_2 FROM sometable'
);
if (!status) {
metadata.forEach((column) => {
// Output:
// int_column_1 - INTEGER
// bol_column_2 - BOOLEAN
console.log(`${column.columnName} - ${column.columnDeclaredType}`);
});
}Async operations
You might have too much SQL to process and it will cause your application to freeze. There are async versions for some of the operations. This will offload the SQLite processing to a different thread.
sqlite.asyncExecuteSql(
'myDatabase',
'SELECT * FROM "User";',
[],
({ status, rows }) => {
if (status === 0) {
console.log('users', rows);
}
}
);Use TypeORM
This package offers a low-level API to raw execute SQL queries. I strongly recommend to use TypeORM (with patch-package). TypeORM already has a sqlite-storage driver. In the example project on the patch folder you can a find a patch for TypeORM.
Follow the instructions to make TypeORM work with React Native (enable decorators, configure babel, etc), then apply the example patch via patch-package.
More
If you want to learn how to make your own JSI module buy my JSI/C++ Cheatsheet, I'm also available for freelance work!
License
react-native-quick-sqlite is licensed under MIT.