module Sequel::SQL::QualifyingMethods

Includes a qualify method that created QualifiedIdentifiers, used for qualifying column names with a table or table names with a schema, and the * method for returning all columns in the identifier if no arguments are given.

Public Instance Methods

*(ce=(arg=false;nil)) click to toggle source

If no arguments are given, return an SQL::ColumnAll:

Sequel[:a__b].*  # a.b.*
Calls superclass method
# File lib/sequel/sql.rb, line 949
def *(ce=(arg=false;nil))
  if arg == false
    Sequel::SQL::ColumnAll.new(self)
  else
    super(ce)
  end
end
[](identifier) click to toggle source

Qualify the receiver with the given qualifier (table for column/schema for table).

Sequel[:table][:column]          # "table"."column"
Sequel[:schema][:table]          # "schema"."table"
Sequel[:schema][:table][:column] # "schema"."table"."column"
# File lib/sequel/sql.rb, line 971
def [](identifier)
  QualifiedIdentifier.new(self, identifier)
end
qualify(qualifier) click to toggle source

Qualify the receiver with the given qualifier (table for column/schema for table).

Sequel[:column].qualify(:table)                  # "table"."column"
Sequel[:table].qualify(:schema)                  # "schema"."table"
Sequel.qualify(:table, :column).qualify(:schema) # "schema"."table"."column"
# File lib/sequel/sql.rb, line 962
def qualify(qualifier)
  QualifiedIdentifier.new(qualifier, self)
end