Class: Sequel::Amalgalite::Database

Inherits:
Database show all
Includes:
SQLite::DatabaseMethods
Defined in:
lib/sequel/adapters/amalgalite.rb

Overview

Database class for SQLite databases used with Sequel and the amalgalite driver.

Constant Summary

Constants included from SQLite::DatabaseMethods

SQLite::DatabaseMethods::AUTO_VACUUM, SQLite::DatabaseMethods::PRIMARY_KEY_INDEX_RE, SQLite::DatabaseMethods::SYNCHRONOUS, SQLite::DatabaseMethods::TABLES_FILTER, SQLite::DatabaseMethods::TEMP_STORE

Constants inherited from Database

Database::ADAPTERS, Database::AUTOINCREMENT, Database::CASCADE, Database::COMMA_SEPARATOR, Database::MYSQL_TIMESTAMP_RE, Database::NOT_NULL, Database::NO_ACTION, Database::NULL, Database::POSTGRES_DEFAULT_RE, Database::PRIMARY_KEY, Database::RESTRICT, Database::SET_DEFAULT, Database::SET_NULL, Database::SQL_BEGIN, Database::SQL_COMMIT, Database::SQL_RELEASE_SAVEPOINT, Database::SQL_ROLLBACK, Database::SQL_ROLLBACK_TO_SAVEPOINT, Database::SQL_SAVEPOINT, Database::STRING_DEFAULT_RE, Database::TEMPORARY, Database::TRANSACTION_BEGIN, Database::TRANSACTION_COMMIT, Database::TRANSACTION_ROLLBACK, Database::UNDERSCORE, Database::UNIQUE, Database::UNSIGNED

Instance Attribute Summary

Attributes inherited from Database

#default_schema, #loggers, #opts, #pool, #prepared_statements

Instance Method Summary collapse

Methods included from SQLite::DatabaseMethods

#alter_table, #auto_vacuum, #auto_vacuum=, #indexes, #pragma_get, #pragma_set, #supports_savepoints?, #synchronous, #synchronous=, #tables, #temp_store, #temp_store=

Methods inherited from Database

#<<, #[], adapter_class, adapter_scheme, #add_column, #add_index, #alter_table, #call, #cast_type_literal, connect, #create_or_replace_view, #create_table, #create_table!, #create_table?, #create_view, #disconnect, #drop_column, #drop_index, #drop_table, #drop_view, #dump_indexes_migration, #dump_schema_migration, #dump_table_schema, #fetch, #from, #get, #identifier_input_method, identifier_input_method, #identifier_input_method=, identifier_input_method=, #identifier_output_method, identifier_output_method, #identifier_output_method=, identifier_output_method=, #initialize, #inspect, #literal, #log_info, #logger=, #query, #quote_identifiers=, quote_identifiers=, #quote_identifiers?, #rename_column, #rename_table, #schema, #select, #serial_primary_key_options, #set_column_default, #set_column_type, single_threaded=, #single_threaded?, #supports_savepoints?, #synchronize, #table_exists?, #test_connection, #transaction, #typecast_value, #uri, #url

Methods included from Metaprogramming

#meta_def

Constructor Details

This class inherits a constructor from Sequel::Database

Instance Method Details

#connect(server) ⇒ Object

Connect to the database. Since SQLite is a file based database, the only options available are :database (to specify the database name), and :timeout, to specify how long to wait for the database to be available if it is locked, given in milliseconds (default is 5000).



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# File 'lib/sequel/adapters/amalgalite.rb', line 66

def connect(server)
  opts = server_opts(server)
  opts[:database] = ':memory:' if blank_object?(opts[:database])
  db = ::Amalgalite::Database.new(opts[:database])
  db.busy_handler(::Amalgalite::BusyTimeout.new(opts.fetch(:timeout, 5000)/50, 50))
  db.type_map = SequelTypeMap.new
  db
end

#database_type ⇒ Object

Amalgalite is just the SQLite database without a separate SQLite installation.



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# File 'lib/sequel/adapters/amalgalite.rb', line 76

def database_type
  :sqlite
end

#dataset(opts = nil) ⇒ Object

Return instance of Sequel::Amalgalite::Dataset with the given options.



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# File 'lib/sequel/adapters/amalgalite.rb', line 81

def dataset(opts = nil)
  Amalgalite::Dataset.new(self, opts)
end

#execute(sql, opts = {}) ⇒ Object

Run the given SQL with the given arguments and yield each row.



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# File 'lib/sequel/adapters/amalgalite.rb', line 102

def execute(sql, opts={})
  retried = false
  _execute(sql, opts) do |conn|
    conn.prepare(sql) do |stmt|
      begin
       stmt.result_meta
      rescue NoMethodError
        conn.reload_schema!
        stmt.result_meta
      end
      yield stmt
    end
  end
end

#execute_ddl(sql, opts = {}) ⇒ Object

Run the given SQL with the given arguments and reload the schema. Returns nil.



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# File 'lib/sequel/adapters/amalgalite.rb', line 86

def execute_ddl(sql, opts={})
  _execute(sql, opts){|conn| conn.execute_batch(sql); conn.reload_schema!}
  nil
end

#execute_dui(sql, opts = {}) ⇒ Object

Run the given SQL with the given arguments and return the number of changed rows.



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# File 'lib/sequel/adapters/amalgalite.rb', line 92

def execute_dui(sql, opts={})
  _execute(sql, opts){|conn| conn.execute_batch(sql); conn.row_changes}
end

#execute_insert(sql, opts = {}) ⇒ Object

Run the given SQL with the given arguments and return the last inserted row id.



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# File 'lib/sequel/adapters/amalgalite.rb', line 97

def execute_insert(sql, opts={})
  _execute(sql, opts){|conn| conn.execute_batch(sql); conn.last_insert_rowid}
end

#single_value(sql, opts = {}) ⇒ Object

Run the given SQL with the given arguments and return the first value of the first row.



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# File 'lib/sequel/adapters/amalgalite.rb', line 118

def single_value(sql, opts={})
  _execute(sql, opts){|conn| conn.first_value_from(sql)}
end