Module: Sequel::SQLite::DatabaseMethods
- Extended by:
- Database::ResetIdentifierMangling
- Included in:
- Amalgalite::Database, DataObjects::SQLite::DatabaseMethods, JDBC::SQLite::DatabaseMethods, Database, Sequel::Swift::SQLite::DatabaseMethods
- Defined in:
- lib/sequel/adapters/shared/sqlite.rb
Overview
No matter how you connect to SQLite, the following Database options can be used to set PRAGMAs on connections in a thread-safe manner: :auto_vacuum, :foreign_keys, :synchronous, and :temp_store.
Constant Summary collapse
- AUTO_VACUUM =
[:none, :full, :incremental].freeze
- PRIMARY_KEY_INDEX_RE =
/\Asqlite_autoindex_/.freeze
- SYNCHRONOUS =
[:off, :normal, :full].freeze
- TABLES_FILTER =
"type = 'table' AND NOT name = 'sqlite_sequence'".freeze
- TEMP_STORE =
[:default, :file, :memory].freeze
- VIEWS_FILTER =
"type = 'view'".freeze
- TRANSACTION_MODE =
{ :deferred => "BEGIN DEFERRED TRANSACTION".freeze, :immediate => "BEGIN IMMEDIATE TRANSACTION".freeze, :exclusive => "BEGIN EXCLUSIVE TRANSACTION".freeze, nil => Sequel::Database::SQL_BEGIN, }.freeze
Instance Attribute Summary collapse
-
#integer_booleans ⇒ Object
Whether to use integers for booleans in the database.
-
#transaction_mode ⇒ Object
A symbol signifying the value of the default transaction mode.
-
#use_timestamp_timezones ⇒ Object
writeonly
Override the default setting for whether to use timezones in timestamps.
Instance Method Summary collapse
-
#auto_vacuum ⇒ Object
A symbol signifying the value of the auto_vacuum PRAGMA.
-
#auto_vacuum=(value) ⇒ Object
Set the auto_vacuum PRAGMA using the given symbol (:none, :full, or :incremental).
-
#case_sensitive_like=(value) ⇒ Object
Set the case_sensitive_like PRAGMA using the given boolean value, if using SQLite 3.2.3+.
-
#database_type ⇒ Object
SQLite uses the :sqlite database type.
-
#foreign_key_list(table, opts = OPTS) ⇒ Object
Return the array of foreign key info hashes using the foreign_key_list PRAGMA, including information for the :on_update and :on_delete entries.
-
#foreign_keys ⇒ Object
Boolean signifying the value of the foreign_keys PRAGMA, or nil if not using SQLite 3.6.19+.
-
#foreign_keys=(value) ⇒ Object
Set the foreign_keys PRAGMA using the given boolean value, if using SQLite 3.6.19+.
-
#indexes(table, opts = OPTS) ⇒ Object
Use the index_list and index_info PRAGMAs to determine the indexes on the table.
-
#pragma_get(name) ⇒ Object
Get the value of the given PRAGMA.
-
#pragma_set(name, value) ⇒ Object
Set the value of the given PRAGMA to value.
-
#set_integer_booleans ⇒ Object
Set the integer_booleans option using the passed in :integer_boolean option.
-
#sqlite_version ⇒ Object
The version of the server as an integer, where 3.6.19 = 30619.
-
#supports_create_table_if_not_exists? ⇒ Boolean
SQLite supports CREATE TABLE IF NOT EXISTS syntax since 3.3.0.
-
#supports_deferrable_foreign_key_constraints? ⇒ Boolean
SQLite 3.6.19+ supports deferrable foreign key constraints.
-
#supports_partial_indexes? ⇒ Boolean
SQLite 3.8.0+ supports partial indexes.
-
#supports_savepoints? ⇒ Boolean
SQLite 3.6.8+ supports savepoints.
-
#synchronous ⇒ Object
A symbol signifying the value of the synchronous PRAGMA.
-
#synchronous=(value) ⇒ Object
Set the synchronous PRAGMA using the given symbol (:off, :normal, or :full).
-
#tables(opts = OPTS) ⇒ Object
Array of symbols specifying the table names in the current database.
-
#temp_store ⇒ Object
A symbol signifying the value of the temp_store PRAGMA.
-
#temp_store=(value) ⇒ Object
Set the temp_store PRAGMA using the given symbol (:default, :file, or :memory).
-
#use_timestamp_timezones? ⇒ Boolean
SQLite supports timezones in timestamps, since it just stores them as strings, but it breaks the usage of SQLite’s datetime functions.
-
#views(opts = OPTS) ⇒ Object
Array of symbols specifying the view names in the current database.
Methods included from Database::ResetIdentifierMangling
Instance Attribute Details
#integer_booleans ⇒ Object
Whether to use integers for booleans in the database. SQLite recommends booleans be stored as integers, but historically Sequel has used ‘t’/‘f’.
26 27 28 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 26 def integer_booleans @integer_booleans end |
#transaction_mode ⇒ Object
A symbol signifying the value of the default transaction mode
49 50 51 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 49 def transaction_mode @transaction_mode end |
#use_timestamp_timezones=(value) ⇒ Object (writeonly)
Override the default setting for whether to use timezones in timestamps. For backwards compatibility, it is set to true
by default. Anyone wanting to use SQLite’s datetime functions should set it to false
using this method. It’s possible that the default will change in a future version, so anyone relying on timezones in timestamps should set this to true
.
167 168 169 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 167 def (value) @use_timestamp_timezones = value end |
Instance Method Details
#auto_vacuum ⇒ Object
A symbol signifying the value of the auto_vacuum PRAGMA.
29 30 31 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 29 def auto_vacuum AUTO_VACUUM[pragma_get(:auto_vacuum).to_i] end |
#auto_vacuum=(value) ⇒ Object
Set the auto_vacuum PRAGMA using the given symbol (:none, :full, or :incremental). See pragma_set. Consider using the :auto_vacuum Database option instead.
36 37 38 39 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 36 def auto_vacuum=(value) value = AUTO_VACUUM.index(value) || (raise Error, "Invalid value for auto_vacuum option. Please specify one of :none, :full, :incremental.") pragma_set(:auto_vacuum, value) end |
#case_sensitive_like=(value) ⇒ Object
Set the case_sensitive_like PRAGMA using the given boolean value, if using SQLite 3.2.3+. If not using 3.2.3+, no error is raised. See pragma_set. Consider using the :case_sensitive_like Database option instead.
44 45 46 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 44 def case_sensitive_like=(value) pragma_set(:case_sensitive_like, !!value ? 'on' : 'off') if sqlite_version >= 30203 end |
#database_type ⇒ Object
SQLite uses the :sqlite database type.
61 62 63 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 61 def database_type :sqlite end |
#foreign_key_list(table, opts = OPTS) ⇒ Object
Return the array of foreign key info hashes using the foreign_key_list PRAGMA, including information for the :on_update and :on_delete entries.
80 81 82 83 84 85 86 87 88 89 90 91 92 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 80 def foreign_key_list(table, opts=OPTS) m = output_identifier_meth h = {} .with_sql("PRAGMA foreign_key_list(?)", input_identifier_meth.call(table)).each do |row| if r = h[row[:id]] r[:columns] << m.call(row[:from]) r[:key] << m.call(row[:to]) if r[:key] else h[row[:id]] = {:columns=>[m.call(row[:from])], :table=>m.call(row[:table]), :key=>([m.call(row[:to])] if row[:to]), :on_update=>on_delete_sql_to_sym(row[:on_update]), :on_delete=>on_delete_sql_to_sym(row[:on_delete])} end end h.values end |
#foreign_keys ⇒ Object
Boolean signifying the value of the foreign_keys PRAGMA, or nil if not using SQLite 3.6.19+.
67 68 69 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 67 def foreign_keys pragma_get(:foreign_keys).to_i == 1 if sqlite_version >= 30619 end |
#foreign_keys=(value) ⇒ Object
Set the foreign_keys PRAGMA using the given boolean value, if using SQLite 3.6.19+. If not using 3.6.19+, no error is raised. See pragma_set. Consider using the :foreign_keys Database option instead.
74 75 76 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 74 def foreign_keys=(value) pragma_set(:foreign_keys, !!value ? 'on' : 'off') if sqlite_version >= 30619 end |
#indexes(table, opts = OPTS) ⇒ Object
Use the index_list and index_info PRAGMAs to determine the indexes on the table.
95 96 97 98 99 100 101 102 103 104 105 106 107 108 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 95 def indexes(table, opts=OPTS) m = output_identifier_meth im = input_identifier_meth indexes = {} .with_sql("PRAGMA index_list(?)", im.call(table)).each do |r| # :only_autocreated internal option can be used to get only autocreated indexes next if (!!(r[:name] =~ PRIMARY_KEY_INDEX_RE) ^ !!opts[:only_autocreated]) indexes[m.call(r[:name])] = {:unique=>r[:unique].to_i==1} end indexes.each do |k, v| v[:columns] = .with_sql("PRAGMA index_info(?)", im.call(k)).map(:name).map{|x| m.call(x)} end indexes end |
#pragma_get(name) ⇒ Object
Get the value of the given PRAGMA.
111 112 113 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 111 def pragma_get(name) self["PRAGMA #{name}"].single_value end |
#pragma_set(name, value) ⇒ Object
Set the value of the given PRAGMA to value.
This method is not thread safe, and will not work correctly if there are multiple connections in the Database’s connection pool. PRAGMA modifications should be done when the connection is created, using an option provided when creating the Database object.
121 122 123 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 121 def pragma_set(name, value) execute_ddl("PRAGMA #{name} = #{value}") end |
#set_integer_booleans ⇒ Object
Set the integer_booleans option using the passed in :integer_boolean option.
126 127 128 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 126 def set_integer_booleans @integer_booleans = @opts.has_key?(:integer_booleans) ? typecast_value_boolean(@opts[:integer_booleans]) : true end |
#sqlite_version ⇒ Object
The version of the server as an integer, where 3.6.19 = 30619. If the server version can’t be determined, 0 is used.
132 133 134 135 136 137 138 139 140 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 132 def sqlite_version return @sqlite_version if defined?(@sqlite_version) @sqlite_version = begin v = fetch('SELECT sqlite_version()').single_value [10000, 100, 1].zip(v.split('.')).inject(0){|a, m| a + m[0] * Integer(m[1])} rescue 0 end end |
#supports_create_table_if_not_exists? ⇒ Boolean
SQLite supports CREATE TABLE IF NOT EXISTS syntax since 3.3.0.
143 144 145 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 143 def supports_create_table_if_not_exists? sqlite_version >= 30300 end |
#supports_deferrable_foreign_key_constraints? ⇒ Boolean
SQLite 3.6.19+ supports deferrable foreign key constraints.
148 149 150 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 148 def supports_deferrable_foreign_key_constraints? sqlite_version >= 30619 end |
#supports_partial_indexes? ⇒ Boolean
SQLite 3.8.0+ supports partial indexes.
153 154 155 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 153 def supports_partial_indexes? sqlite_version >= 30800 end |
#supports_savepoints? ⇒ Boolean
SQLite 3.6.8+ supports savepoints.
158 159 160 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 158 def supports_savepoints? sqlite_version >= 30608 end |
#synchronous ⇒ Object
A symbol signifying the value of the synchronous PRAGMA.
176 177 178 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 176 def synchronous SYNCHRONOUS[pragma_get(:synchronous).to_i] end |
#synchronous=(value) ⇒ Object
Set the synchronous PRAGMA using the given symbol (:off, :normal, or :full). See pragma_set. Consider using the :synchronous Database option instead.
182 183 184 185 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 182 def synchronous=(value) value = SYNCHRONOUS.index(value) || (raise Error, "Invalid value for synchronous option. Please specify one of :off, :normal, :full.") pragma_set(:synchronous, value) end |
#tables(opts = OPTS) ⇒ Object
Array of symbols specifying the table names in the current database.
Options:
- :server
-
Set the server to use.
191 192 193 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 191 def tables(opts=OPTS) tables_and_views(TABLES_FILTER, opts) end |
#temp_store ⇒ Object
A symbol signifying the value of the temp_store PRAGMA.
196 197 198 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 196 def temp_store TEMP_STORE[pragma_get(:temp_store).to_i] end |
#temp_store=(value) ⇒ Object
Set the temp_store PRAGMA using the given symbol (:default, :file, or :memory). See pragma_set. Consider using the :temp_store Database option instead.
202 203 204 205 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 202 def temp_store=(value) value = TEMP_STORE.index(value) || (raise Error, "Invalid value for temp_store option. Please specify one of :default, :file, :memory.") pragma_set(:temp_store, value) end |
#use_timestamp_timezones? ⇒ Boolean
SQLite supports timezones in timestamps, since it just stores them as strings, but it breaks the usage of SQLite’s datetime functions.
171 172 173 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 171 def defined?(@use_timestamp_timezones) ? @use_timestamp_timezones : (@use_timestamp_timezones = false) end |
#views(opts = OPTS) ⇒ Object
Array of symbols specifying the view names in the current database.
Options:
- :server
-
Set the server to use.
211 212 213 |
# File 'lib/sequel/adapters/shared/sqlite.rb', line 211 def views(opts=OPTS) tables_and_views(VIEWS_FILTER, opts) end |