class Sequel::SQL::JoinClause

  1. lib/sequel/sql.rb
Superclass: Expression

Represents an SQL JOIN clause, used for joining tables.

Methods

Public Class

  1. new

Public Instance

  1. column_aliases
  2. join_type
  3. table
  4. table_alias
  5. table_expr

Attributes

join_type [R]

The type of join to do
table_expr [R]

The expression representing the table/set related to the JOIN. Is an AliasedExpression if the JOIN uses an alias.

Public Class methods

new(join_type, table_expr)

Create an object with the given join_type and table expression.

[show source] 
     # File lib/sequel/sql.rb
1542 def initialize(join_type, table_expr)
1543   @join_type = join_type
1544   @table_expr = table_expr
1545   freeze
1546 end

Public Instance methods

column_aliases()

The column aliases to use for the JOIN , or nil if the JOIN does not use a derived column list.

[show source] 
     # File lib/sequel/sql.rb
1567 def column_aliases
1568   if @table_expr.is_a?(AliasedExpression)
1569     @table_expr.columns
1570   end
1571 end
table()

The table/set related to the JOIN, without any alias.

[show source] 
     # File lib/sequel/sql.rb
1549 def table
1550   if @table_expr.is_a?(AliasedExpression)
1551     @table_expr.expression
1552   else
1553     @table_expr
1554   end
1555 end
table_alias()

The table alias to use for the JOIN , or nil if the JOIN does not alias the table.

[show source] 
     # File lib/sequel/sql.rb
1559 def table_alias
1560   if @table_expr.is_a?(AliasedExpression)
1561     @table_expr.alias
1562   end
1563 end