Class: Sequel::SQL::QualifiedColumnRef

Inherits:

Expression

• Object
• Expression
• Sequel::SQL::QualifiedColumnRef

Defined in:

lib/sequel_core/sql.rb

Overview

Represents a qualified (column with table) reference. Used when joining tables to disambiguate columns.

Constant Summary

Constants included from ColumnMethods

ColumnMethods::AS, ColumnMethods::ASC, ColumnMethods::DESC

Instance Attribute Summary

• #column ⇒ Object readonly

  The table and column to reference.

• #table ⇒ Object readonly

  The table and column to reference.

Instance Method Summary

• #initialize(table, column) ⇒ QualifiedColumnRef constructor

  Set the attributes to the given arguments.

• #to_s(ds) ⇒ Object

  Delegate the creation of the resulting SQL to the given dataset, since it may be database dependent.

Methods inherited from Expression

#lit

Methods included from ColumnMethods

#as, #asc, #cast_as, #desc

Constructor Details

#initialize(table, column) ⇒ QualifiedColumnRef

Set the attributes to the given arguments

# File 'lib/sequel_core/sql.rb', line 455

def initialize(table, column)
  @table, @column = table, column
end

Instance Attribute Details

#column ⇒ Object (readonly)

The table and column to reference

# File 'lib/sequel_core/sql.rb', line 452

def column
  @column
end

#table ⇒ Object (readonly)

The table and column to reference

# File 'lib/sequel_core/sql.rb', line 452

def table
  @table
end

Instance Method Details

#to_s(ds) ⇒ Object

Delegate the creation of the resulting SQL to the given dataset, since it may be database dependent.

# File 'lib/sequel_core/sql.rb', line 461

def to_s(ds)
  ds.qualified_column_ref_sql(self)
end