Module: Sequel::Oracle::DatabaseMethods

Included in:
JDBC::Oracle::DatabaseMethods, Database
Defined in:
lib/sequel/adapters/shared/oracle.rb

Constant Summary collapse

IGNORE_OWNERS = 
%w'APEX_040000 CTXSYS EXFSYS MDSYS OLAPSYS ORDDATA ORDSYS SYS SYSTEM XDB XDBMETADATA XDBPM XFILES WMSYS'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#autosequence ⇒ Object

Returns the value of attribute autosequence.



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# File 'lib/sequel/adapters/shared/oracle.rb', line 18

def autosequence
  @autosequence
end

Instance Method Details

#create_sequence(name, opts = OPTS) ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 20

def create_sequence(name, opts=OPTS)
  self << create_sequence_sql(name, opts)
end

#create_trigger(*args) ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 24

def create_trigger(*args)
  self << create_trigger_sql(*args)
end

#current_user ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 28

def current_user
  @current_user ||= metadata_dataset.get{sys_context('USERENV', 'CURRENT_USER')}
end

#database_type ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 36

def database_type
  :oracle
end

#drop_sequence(name) ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 32

def drop_sequence(name)
  self << drop_sequence_sql(name)
end

#foreign_key_list(table, opts = OPTS) ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 40

def foreign_key_list(table, opts=OPTS)
  m = output_identifier_meth
  im = input_identifier_meth
  schema, table = schema_and_table(table)
  ds = metadata_dataset.
    from{[all_cons_columns.as(:pc), all_constraints.as(:p), all_cons_columns.as(:fc), all_constraints.as(:f)]}.
    where{{
      f[:table_name]=>im.call(table),
      f[:constraint_type]=>'R',
      p[:owner]=>f[:r_owner],
      p[:constraint_name]=>f[:r_constraint_name],
      pc[:owner]=>p[:owner],
      pc[:constraint_name]=>p[:constraint_name],
      pc[:table_name]=>p[:table_name],
      fc[:owner]=>f[:owner],
      fc[:constraint_name]=>f[:constraint_name],
      fc[:table_name]=>f[:table_name],
      fc[:position]=>pc[:position]}}.
    select{[p[:table_name].as(:table), pc[:column_name].as(:key), fc[:column_name].as(:column), f[:constraint_name].as(:name)]}.
    order{[:table, fc[:position]]}
  ds = ds.where{{f[:schema_name]=>im.call(schema)}} if schema

  fks = {}
  ds.each do |r|
    if fk = fks[r[:name]]
      fk[:columns] << m.call(r[:column])
      fk[:key] << m.call(r[:key])
    else
      fks[r[:name]] = {:name=>m.call(r[:name]), :columns=>[m.call(r[:column])], :table=>m.call(r[:table]), :key=>[m.call(r[:key])]}
    end
  end
  fks.values
end

#freeze ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 74

def freeze
  current_user
  server_version
  @conversion_procs.freeze
  super
end

#global_index_namespace? ⇒ Boolean

Oracle namespaces indexes per table.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/shared/oracle.rb', line 82

def global_index_namespace?
  false
end

#server_version(server = nil) ⇒ Object

The version of the Oracle server, used for determining capability.



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# File 'lib/sequel/adapters/shared/oracle.rb', line 122

def server_version(server=nil)
  return @server_version if @server_version
  @server_version = synchronize(server) do |conn|
    (conn.server_version rescue nil) if conn.respond_to?(:server_version)
  end
  unless @server_version
    @server_version = if m = /(\d+)\.(\d+)\.?(\d+)?\.?(\d+)?/.match(fetch("select version from PRODUCT_COMPONENT_VERSION where lower(product) like 'oracle%'").single_value)
      (m[1].to_i*1000000) + (m[2].to_i*10000) + (m[3].to_i*100) + m[4].to_i
    else
      0
    end
  end
  @server_version
end

#supports_deferrable_constraints? ⇒ Boolean

Oracle supports deferrable constraints.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/shared/oracle.rb', line 139

def supports_deferrable_constraints?
  true
end

#supports_transaction_isolation_levels? ⇒ Boolean

Oracle supports transaction isolation levels.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/shared/oracle.rb', line 144

def supports_transaction_isolation_levels?
  true
end

#tables(opts = OPTS) ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 88

def tables(opts=OPTS)
  m = output_identifier_meth
  metadata_dataset.from(:all_tables).
    server(opts[:server]).
    where(:dropped=>'NO').
    exclude(:owner=>IGNORE_OWNERS).
    select(:table_name).
    map{|r| m.call(r[:table_name])}
end

#view_exists?(name, opts = OPTS) ⇒ Boolean

Whether a view with a given name exists. By default, looks in all schemas other than system schemas. If the :current_schema option is given, looks in the schema for the current user.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/shared/oracle.rb', line 109

def view_exists?(name, opts=OPTS) 
  ds = metadata_dataset.from(:all_views).where(:view_name=>input_identifier_meth.call(name))
  
  if opts[:current_schema]
    ds = ds.where(:owner=>Sequel.function(:SYS_CONTEXT, 'userenv', 'current_schema'))
  else
    ds = ds.exclude(:owner=>IGNORE_OWNERS)
  end

  ds.count > 0
end

#views(opts = OPTS) ⇒ Object 



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# File 'lib/sequel/adapters/shared/oracle.rb', line 98

def views(opts=OPTS) 
  m = output_identifier_meth
  metadata_dataset.from(:all_views).
    server(opts[:server]).
    exclude(:owner=>IGNORE_OWNERS).
    select(:view_name).
    map{|r| m.call(r[:view_name])}
end