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 1474 def initialize(join_type, table_expr) 1475 @join_type = join_type 1476 @table_expr = table_expr 1477 freeze 1478 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 1499 def column_aliases 1500 if @table_expr.is_a?(AliasedExpression) 1501 @table_expr.columns 1502 end 1503 end
table()
click to toggle source
The table/set related to the JOIN, without any alias.
# File lib/sequel/sql.rb 1481 def table 1482 if @table_expr.is_a?(AliasedExpression) 1483 @table_expr.expression 1484 else 1485 @table_expr 1486 end 1487 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 1491 def table_alias 1492 if @table_expr.is_a?(AliasedExpression) 1493 @table_expr.alias 1494 end 1495 end