module Sequel::SQL::QualifyingMethods
Includes a qualify
and []
methods that create QualifiedIdentifier
s, 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))
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If no arguments are given, return an SQL::ColumnAll:
Sequel[:a].* # a.*
Calls superclass method
# File lib/sequel/sql.rb 897 def *(ce=(arg=false;nil)) 898 if arg == false 899 Sequel::SQL::ColumnAll.new(self) 900 else 901 super(ce) 902 end 903 end
[](identifier)
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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 919 def [](identifier) 920 QualifiedIdentifier.new(self, identifier) 921 end
qualify(qualifier)
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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 910 def qualify(qualifier) 911 QualifiedIdentifier.new(qualifier, self) 912 end