### Home Classes Methods

### In Files

- lib/sequel/adapters/amalgalite.rb

### Parent

Sequel::Database

### Methods

- #_execute
- #connect
- #connection_pool_default_options
- #database_error_classes
- #database_type
- #disconnect_connection
- #execute
- #execute_ddl
- #execute_dui
- #execute_insert
- #single_value

### Included Modules

- ::Sequel::SQLite::DatabaseMethods

### Files

- CHANGELOG
- MIT-LICENSE
- README.rdoc
- active_record.rdoc
- advanced_associations.rdoc
- association_basics.rdoc
- cheat_sheet.rdoc
- dataset_basics.rdoc
- dataset_filtering.rdoc
- mass_assignment.rdoc
- migration.rdoc
- model_hooks.rdoc
- opening_databases.rdoc
- prepared_statements.rdoc
- querying.rdoc
- reflection.rdoc
- 1.0.txt
- 1.1.txt
- 1.3.txt
- 1.4.0.txt
- 1.5.0.txt
- 2.0.0.txt
- 2.1.0.txt
- 2.10.0.txt
- 2.11.0.txt
- 2.12.0.txt
- 2.2.0.txt
- 2.3.0.txt
- 2.4.0.txt
- 2.5.0.txt
- 2.6.0.txt
- 2.7.0.txt
- 2.8.0.txt
- 2.9.0.txt
- 3.0.0.txt
- 3.1.0.txt
- 3.10.0.txt
- 3.11.0.txt
- 3.12.0.txt
- 3.13.0.txt
- 3.14.0.txt
- 3.15.0.txt
- 3.16.0.txt
- 3.17.0.txt
- 3.18.0.txt
- 3.19.0.txt
- 3.2.0.txt
- 3.20.0.txt
- 3.21.0.txt
- 3.22.0.txt
- 3.23.0.txt
- 3.24.0.txt
- 3.25.0.txt
- 3.26.0.txt
- 3.27.0.txt
- 3.28.0.txt
- 3.29.0.txt
- 3.3.0.txt
- 3.30.0.txt
- 3.31.0.txt
- 3.32.0.txt
- 3.33.0.txt
- 3.4.0.txt
- 3.5.0.txt
- 3.6.0.txt
- 3.7.0.txt
- 3.8.0.txt
- 3.9.0.txt
- schema_modification.rdoc
- sharding.rdoc
- sql.rdoc
- testing.rdoc
- transactions.rdoc
- validations.rdoc
- virtual_rows.rdoc

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No matching classes.

# Sequel::Amalgalite::Database

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

### Public Instance Methods

connect(server) click to toggle source

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).

        # File lib/sequel/adapters/amalgalite.rb, line 76
    76:       def connect(server)
    77:         opts = server_opts(server)
    78:         opts[:database] = ':memory:' if blank_object?(opts[:database])
    79:         db = ::Amalgalite::Database.new(opts[:database])
    80:         db.busy_handler(::Amalgalite::BusyTimeout.new(opts.fetch(:timeout, 5000)/50, 50))
    81:         db.type_map = SequelTypeMap.new(self)
    82:         connection_pragmas.each{|s| log_yield(s){db.execute_batch(s)}}
    83:         db
    84:       end

database_type() click to toggle source

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

        # File lib/sequel/adapters/amalgalite.rb, line 87
    87:       def database_type
    88:         :sqlite
    89:       end

execute(sql, opts={}) click to toggle source

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

         # File lib/sequel/adapters/amalgalite.rb, line 108
    108:       def execute(sql, opts={})
    109:         _execute(sql, opts) do |conn|
    110:           begin
    111:             yield(stmt = log_yield(sql){conn.prepare(sql)})
    112:           ensure
    113:             stmt.close if stmt
    114:           end
    115:         end
    116:       end

execute_ddl(sql, opts={}) click to toggle source

Run the given SQL with the given arguments. Returns nil.

        # File lib/sequel/adapters/amalgalite.rb, line 92
    92:       def execute_ddl(sql, opts={})
    93:         _execute(sql, opts){|conn| log_yield(sql){conn.execute_batch(sql)}}
    94:         nil
    95:       end

execute_dui(sql, opts={}) click to toggle source

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

         # File lib/sequel/adapters/amalgalite.rb, line 98
     98:       def execute_dui(sql, opts={})
     99:         _execute(sql, opts){|conn| log_yield(sql){conn.execute_batch(sql)}; conn.row_changes}
    100:       end

execute_insert(sql, opts={}) click to toggle source

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

         # File lib/sequel/adapters/amalgalite.rb, line 103
    103:       def execute_insert(sql, opts={})
    104:         _execute(sql, opts){|conn| log_yield(sql){conn.execute_batch(sql)}; conn.last_insert_rowid}
    105:       end

single_value(sql, opts={}) click to toggle source

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

         # File lib/sequel/adapters/amalgalite.rb, line 119
    119:       def single_value(sql, opts={})
    120:         _execute(sql, opts){|conn| log_yield(sql){conn.first_value_from(sql)}}
    121:       end

### Private Instance Methods

_execute(sql, opts) click to toggle source

Yield an available connection. Rescue any Amalgalite::Errors and turn them into DatabaseErrors.

         # File lib/sequel/adapters/amalgalite.rb, line 127
    127:       def _execute(sql, opts)
    128:         begin
    129:           synchronize(opts[:server]){|conn| yield conn}
    130:         rescue ::Amalgalite::Error, ::Amalgalite::SQLite3::Error => e
    131:           raise_error(e)
    132:         end
    133:       end

connection_pool_default_options() click to toggle source

The Amagalite adapter does not need the pool to convert exceptions. Also, force the max connections to 1 if a memory database is being used, as otherwise each connection gets a separate database.

         # File lib/sequel/adapters/amalgalite.rb, line 138
    138:       def connection_pool_default_options
    139:         o = super.dup
    140:         # Default to only a single connection if a memory database is used,
    141:         # because otherwise each connection will get a separate database
    142:         o[:max_connections] = 1 if @opts[:database] == ':memory:' || blank_object?(@opts[:database])
    143:         o
    144:       end

database_error_classes() click to toggle source

Both main error classes that Amalgalite raises

         # File lib/sequel/adapters/amalgalite.rb, line 147
    147:       def database_error_classes
    148:         [::Amalgalite::Error, ::Amalgalite::SQLite3::Error]
    149:       end

disconnect_connection(c) click to toggle source

Disconnect given connections from the database.

         # File lib/sequel/adapters/amalgalite.rb, line 152
    152:       def disconnect_connection(c)
    153:         c.close
    154:       end

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