Module: Sequel::MySQL::DatabaseMethods

Constants

 'AUTO_INCREMENT'.freeze
 {String=>:CHAR, Integer=>:SIGNED, Time=>:DATETIME, DateTime=>:DATETIME, Numeric=>:DECIMAL, BigDecimal=>:DECIMAL, File=>:BINARY}
 'PRIMARY'.freeze

Public Instance methods

cast_type_literal(type)

MySQL‘s cast rules are restrictive in that you can‘t just cast to any possible database type.

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 29
29:       def cast_type_literal(type)
30:         CAST_TYPES[type] || super
31:       end

database_type()

MySQL uses the :mysql database type

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 34
34:       def database_type
35:         :mysql
36:       end

indexes(table, opts={})

Use SHOW INDEX FROM to get the index information for the table.

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 39
39:       def indexes(table, opts={})
40:         indexes = {}
41:         remove_indexes = []
42:         m = output_identifier_meth
43:         im = input_identifier_meth
44:         metadata_dataset.with_sql("SHOW INDEX FROM ?", SQL::Identifier.new(im.call(table))).each do |r|
45:           name = r[:Key_name]
46:           next if name == PRIMARY
47:           name = m.call(name)
48:           remove_indexes << name if r[:Sub_part]
49:           i = indexes[name] ||= {:columns=>[], :unique=>r[:Non_unique] != 1}
50:           i[:columns] << m.call(r[:Column_name])
51:         end
52:         indexes.reject{|k,v| remove_indexes.include?(k)}
53:       end

server_version()

Get version of MySQL server, used for determined capabilities.

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 56
56:       def server_version
57:         m = /(\d+)\.(\d+)\.(\d+)/.match(get(SQL::Function.new(:version)))
58:         @server_version ||= (m[1].to_i * 10000) + (m[2].to_i * 100) + m[3].to_i
59:       end

supports_savepoints?()

MySQL supports savepoints

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 71
71:       def supports_savepoints?
72:         true
73:       end

tables(opts={})

Return an array of symbols specifying table names in the current database.

Options:

:server - Set the server to use

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 65
65:       def tables(opts={})
66:         m = output_identifier_meth
67:         metadata_dataset.with_sql('SHOW TABLES').server(opts[:server]).map{|r| m.call(r.values.first)}
68:       end

use(db_name)

Changes the database in use by issuing a USE statement. I would be very careful if I used this.

[Source]

    # File lib/sequel/adapters/shared/mysql.rb, line 77
77:       def use(db_name)
78:         disconnect
79:         @opts[:database] = db_name if self << "USE #{db_name}"
80:         @schemas = {}
81:         self
82:       end