class Sequel::SQL::JoinClause

Represents an SQL JOIN clause, used for joining tables.

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) click to toggle source

Create an object with the given join_type and table expression.

     # File lib/sequel/sql.rb
1549 def initialize(join_type, table_expr)
1550   @join_type = join_type
1551   @table_expr = table_expr
1552   freeze
1553 end

Public Instance Methods

column_aliases() click to toggle source

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

     # File lib/sequel/sql.rb
1574 def column_aliases
1575   if @table_expr.is_a?(AliasedExpression)
1576     @table_expr.columns
1577   end
1578 end

table() click to toggle source

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

     # File lib/sequel/sql.rb
1556 def table
1557   if @table_expr.is_a?(AliasedExpression)
1558     @table_expr.expression
1559   else
1560     @table_expr
1561   end
1562 end

table_alias() click to toggle source

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

     # File lib/sequel/sql.rb
1566 def table_alias
1567   if @table_expr.is_a?(AliasedExpression)
1568     @table_expr.alias
1569   end
1570 end