go-sqlite3

Latest stable version is v1.14 or later, not v2.

Description

A sqlite3 driver that conforms to the built-in database/sql interface.

Supported Golang version: See .github/workflows/go.yaml.

This package follows the official Golang Release Policy.

Overview

• go-sqlite3
• Description
  • Overview
• Installation
• API Reference
• Connection String
• DSN Examples
• Features
  • Usage
  • Feature / Extension List
• Compilation
• Android
• ARM
• Cross Compile
• Compiling
• Linux
  • Alpine
  • Fedora
  • Ubuntu
• macOS
• Windows
• Errors
• User Authentication
• Compile
• Usage
  • Create protected database
  • Password Encoding
  • Available Encoders
  • Restrictions
  • Support
  • User Management
  • SQL
    • Examples
  • *SQLiteConn
  • Attached database
• Extensions
• Spatialite
• FAQ
• License
• Author

Installation

This package can be installed with the go get command:

go get github.com/mattn/go-sqlite3

go-sqlite3 is cgo package. If you want to build your app using go-sqlite3, you need gcc.

Important: because this is a CGO enabled package, you are required to set the environment variable CGO_ENABLED=1 and have a gcc compiler present within your path.

API Reference

API documentation can be found here.

Examples can be found under the examples directory.

Connection String

When creating a new SQLite database or connection to an existing one, with the file name additional options can be given. This is also known as a DSN (Data Source Name) string.

Options are append after the filename of the SQLite database. The database filename and options are separated by an ? (Question Mark). Options should be URL-encoded (see url.QueryEscape).

This also applies when using an in-memory database instead of a file.

Options can be given using the following format: KEYWORD=VALUE and multiple options can be combined with the & ampersand.

This library supports DSN options of SQLite itself and provides additional options.

Boolean values can be one of: * 0 no false off * 1 yes true on

Name	Key	Value(s)	Description
UA - Create	_auth	-	Create User Authentication, for more information see User Authentication
UA - Username	_auth_user	string	Username for User Authentication, for more information see User Authentication
UA - Password	_auth_pass	string	Password for User Authentication, for more information see User Authentication
UA - Crypt	_auth_crypt	SHA1 SSHA1 SHA256 SSHA256 SHA384 SSHA384 SHA512 SSHA512	Password encoder to use for User Authentication, for more information see User Authentication
UA - Salt	_auth_salt	string	Salt to use if the configure password encoder requires a salt, for User Authentication, for more information see User Authentication
Auto Vacuum	_auto_vacuum | _vacuum	0 | none 1 | full 2 | incremental	For more information see PRAGMA auto_vacuum
Busy Timeout	_busy_timeout | _timeout	int	Specify value for sqlite3_busy_timeout. For more information see PRAGMA busy_timeout
Case Sensitive LIKE	_case_sensitive_like | _cslike	boolean	For more information see PRAGMA case_sensitive_like
Defer Foreign Keys	_defer_foreign_keys | _defer_fk	boolean	For more information see PRAGMA defer_foreign_keys
Foreign Keys	_foreign_keys | _fk	boolean	For more information see PRAGMA foreign_keys
Ignore CHECK Constraints	_ignore_check_constraints	boolean	For more information see PRAGMA ignore_check_constraints
Immutable	immutable	boolean	For more information see Immutable
Journal Mode	_journal_mode | _journal	DELETE TRUNCATE PERSIST MEMORY WAL OFF	For more information see PRAGMA journal_mode
Locking Mode	_locking_mode | _locking	NORMAL EXCLUSIVE	For more information see PRAGMA locking_mode
Mode	mode	ro rw rwc memory	Access Mode of the database. For more information see SQLite Open
Mutex Locking	_mutex	no full	Specify mutex mode.
Query Only	_query_only	boolean	For more information see PRAGMA query_only
Recursive Triggers	_recursive_triggers | _rt	boolean	For more information see PRAGMA recursive_triggers
Secure Delete	_secure_delete	boolean | FAST	For more information see PRAGMA secure_delete
Shared-Cache Mode	cache	shared private	Set cache mode for more information see sqlite.org
Synchronous	_synchronous | _sync	0 | OFF 1 | NORMAL 2 | FULL 3 | EXTRA	For more information see PRAGMA synchronous
Time Zone Location	_loc	auto	Specify location of time format.
Transaction Lock	_txlock	immediate deferred exclusive	Specify locking behavior for transactions.
Writable Schema	_writable_schema	Boolean	When this pragma is on, the SQLITE_MASTER tables in which database can be changed using ordinary UPDATE, INSERT, and DELETE statements. Warning: misuse of this pragma can easily result in a corrupt database file.
Cache Size	_cache_size	int	Maximum cache size; default is 2000K (2M). See PRAGMA cache_size
Statement Cache Size	_stmt_cache_size	int	Maximum number of prepared statements cached per connection; default is 0 (disabled). Note that sql.DB is a connection pool, so each connection maintains its own independent cache.

DSN Examples

file:test.db?cache=shared&mode=memory

Features

This package allows additional configuration of features available within SQLite3 to be enabled or disabled by golang build constraints also known as build tags.

Click here for more information about build tags / constraints.

Usage

If you wish to build this library with additional extensions / features, use the following command:

go build -tags "<FEATURE>"

For available features, see the extension list. When using multiple build tags, all the different tags should be space delimited.

Example:

go build -tags "icu json1 fts5 secure_delete"

Feature / Extension List

Extension	Build Tag	Description
Additional Statistics	sqlite_stat4	This option adds additional logic to the ANALYZE command and to the query planner that can help SQLite to chose a better query plan under certain situations. The ANALYZE command is enhanced to collect histogram data from all columns of every index and store that data in the sqlite_stat4 table.

The query planner will then use the histogram data to help it make better index choices. The downside of this compile-time option is that it violates the query planner stability guarantee making it more difficult to ensure consistent performance in mass-produced applications.

SQLITE_ENABLE_STAT4 is an enhancement of SQLITE_ENABLE_STAT3. STAT3 only recorded histogram data for the left-most column of each index whereas the STAT4 enhancement records histogram data from all columns of each index.

The SQLITE_ENABLE_STAT3 compile-time option is a no-op and is ignored if the SQLITE_ENABLE_STAT4 compile-time option is used | | Allow URI Authority | sqlite_allow_uri_authority | URI filenames normally throws an error if the authority section is not either empty or "localhost".

However, if SQLite is compiled with the SQLITE_ALLOW_URI_AUTHORITY compile-time option, then the URI is converted into a Uniform Naming Convention (UNC) filename and passed down to the underlying operating system that way | | App Armor | sqlite_app_armor | When defined, this C-preprocessor macro activates extra code that attempts to detect misuse of the SQLite API, such as passing in NULL pointers to required parameters or using objects after they have been destroyed.

App Armor is not available under Windows. | | Disable Load Extensions | sqlite_omit_load_extension | Loading of external extensions is enabled by default.

To disable extension loading add the build tag sqlite_omit_load_extension. | | Enable Serialization with libsqlite3 | sqlite_serialize | Serialization and deserialization of a SQLite database is available by default, unless the build tag libsqlite3 is set.

To enable this functionality even if libsqlite3 is set, add the build tag sqlite_serialize. | | Foreign Keys | sqlite_foreign_keys | This macro determines whether enforcement of foreign key constraints is enabled or disabled by default for new database connections.

Each database connection can always turn enforcement of foreign key constraints on and off and run-time using the foreign_keys pragma.

Enforcement of foreign key constraints is normally off by default, but if this compile-time parameter is set to 1, enforcement of foreign key constraints will be on by default | | Full Auto Vacuum | sqlite_vacuum_full | Set the default auto vacuum to full | | Incremental Auto Vacuum | sqlite_vacuum_incr | Set the default auto vacuum to incremental | | Full Text Search Engine | sqlite_fts5 | When this option is defined in the amalgamation, versions 5 of the full-text search engine (fts5) is added to the build automatically | | International Components for Unicode | sqlite_icu | This option causes the International Components for Unicode or "ICU" extension to SQLite to be added to the build | | Introspect PRAGMAS | sqlite_introspect | This option adds some extra PRAGMA statements.

• PRAGMA function_list
• PRAGMA module_list
• PRAGMA pragma_list

| | JSON SQL Functions | sqlite_json | When this option is defined in the amalgamation, the JSON SQL functions are added to the build automatically | | Math Functions | sqlite_math_functions | This compile-time option enables built-in scalar math functions. For more information see Built-In Mathematical SQL Functions | | OS Trace | sqlite_os_trace | This option enables OSTRACE() debug logging. This can be verbose and should not be used in production. | | Percentile | sqlite_percentile | This option enables The Percentile Extension. | | Pre Update Hook | sqlite_preupdate_hook | Registers a callback function that is invoked prior to each INSERT, UPDATE, and DELETE operation on a database table. | | Secure Delete | sqlite_secure_delete | This compile-time option changes the default setting of the secure_delete pragma.

When this option is not used, secure_delete defaults to off. When this option is present, secure_delete defaults to on.

The secure_delete setting causes deleted content to be overwritten with zeros. There is a small performance penalty since additional I/O must occur.

On the other hand, secure_delete can prevent fragments of sensitive information from lingering in unused parts of the database file after it has been delete