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)
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Create an object with the given join_type
and table expression.
# File lib/sequel/sql.rb 1524 def initialize(join_type, table_expr) 1525 @join_type = join_type 1526 @table_expr = table_expr 1527 freeze 1528 end
Public Instance Methods
column_aliases()
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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 1549 def column_aliases 1550 if @table_expr.is_a?(AliasedExpression) 1551 @table_expr.columns 1552 end 1553 end
table()
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The table/set related to the JOIN, without any alias.
# File lib/sequel/sql.rb 1531 def table 1532 if @table_expr.is_a?(AliasedExpression) 1533 @table_expr.expression 1534 else 1535 @table_expr 1536 end 1537 end
table_alias()
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The table alias to use for the JOIN , or nil if the JOIN does not alias the table.
# File lib/sequel/sql.rb 1541 def table_alias 1542 if @table_expr.is_a?(AliasedExpression) 1543 @table_expr.alias 1544 end 1545 end