Class: Bmg::Sql::Relation

Inherits:
Object
  • Object
show all
Includes:
Relation
Defined in:
lib/bmg/sql/relation.rb

Direct Known Subclasses

Bmg::Sequel::Relation

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Relation

#_count, #count, #debug, empty, #empty?, new, #one, #one_or_nil, #to_csv, #to_json, #to_xlsx, #visit, #with_type, #with_type_attrlist, #with_typecheck, #without_typecheck, #y_by_x, #ys_by_x

Methods included from Algebra

#allbut, #autosummarize, #autowrap, #constants, #extend, #group, #image, #join, #left_join, #matching, #materialize, #minus, #not_matching, #page, #project, #rename, #restrict, #spied, #summarize, #transform, #ungroup, #union, #unspied, #unwrap

Methods included from Algebra::Shortcuts

#cross_product, #exclude, #image, #images, #join, #left_join, #matching, #not_matching, #prefix, #rxmatch, #suffix, #ungroup, #unwrap, #where

Constructor Details

#initialize(type, builder, expr) ⇒ Relation

Returns a new instance of Relation.



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# File 'lib/bmg/sql/relation.rb', line 6

def initialize(type, builder, expr)
  @type = type
  @builder = builder
  @expr = expr
end

Instance Attribute Details

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/bmg/sql/relation.rb', line 12

def type
  @type
end

Instance Method Details

#bind(binding) ⇒ Object 



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# File 'lib/bmg/sql/relation.rb', line 20

def bind(binding)
  expr = before_use(self.expr)
  expr = Processor::Bind.new(binding, builder).call(expr)
  _instance(type, builder, expr)
end

#delete(*args, &bl) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/bmg/sql/relation.rb', line 30

def delete(*args, &bl)
  raise NotImplementedError
end

#each(&bl) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/bmg/sql/relation.rb', line 26

def each(&bl)
  raise NotImplementedError
end

#insert(*args, &bl) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/bmg/sql/relation.rb', line 34

def insert(*args, &bl)
  raise NotImplementedError
end

#to_ast ⇒ Object 



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# File 'lib/bmg/sql/relation.rb', line 238

def to_ast
  [:sql, to_sql]
end

#to_s ⇒ Object Also known as: inspect 



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# File 'lib/bmg/sql/relation.rb', line 242

def to_s
  "(sql #{to_sql})"
end

#to_sql ⇒ Object 



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# File 'lib/bmg/sql/relation.rb', line 234

def to_sql
  expr.to_sql("", Dialect.default)
end

#update(*args, &bl) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/bmg/sql/relation.rb', line 38

def update(*args, &bl)
  raise NotImplementedError
end