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
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() 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
1567 def column_aliases
1568   if @table_expr.is_a?(AliasedExpression)
1569     @table_expr.columns
1570   end
1571 end
table() click to toggle source

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

     # 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() 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
1559 def table_alias
1560   if @table_expr.is_a?(AliasedExpression)
1561     @table_expr.alias
1562   end
1563 end