Class: Arel::Visitors::IBM_DB

Inherits:
Object
  • Object
show all
Defined in:
lib/arel_extensions/visitors/ibm_db.rb

Instance Method Summary collapse

Instance Method Details

#visit_ArelExtensions_Nodes_Ceil(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/ibm_db.rb', line 4

def visit_ArelExtensions_Nodes_Ceil o, collector
  collector << 'CEILING('
  collector = visit o.expr, collector
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_DateDiff(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/ibm_db.rb', line 21

def visit_ArelExtensions_Nodes_DateDiff o, collector
  collector << 'DAY('
  collector = visit o.left, collector
  collector << ','
  if o.right.is_a?(Arel::Attributes::Attribute)
    collector = visit o.right, collector
  else
    collector << "'#{o.right}'"
  end
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_Duration(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/ibm_db.rb', line 34

def visit_ArelExtensions_Nodes_Duration o, collector
  # visit left for period
  if o.left == 'd'
    collector << 'DAY('
  elsif o.left == 'm'
    collector << 'MONTH('
  elsif o.left == 'w'
    collector << 'WEEK'
  elsif o.left == 'y'
    collector << 'YEAR('
  end
  # visit right
  if o.right.is_a?(Arel::Attributes::Attribute)
    collector = visit o.right, collector
  else
    collector << "'#{o.right}'"
  end
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_IsNull(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/ibm_db.rb', line 55

def visit_ArelExtensions_Nodes_IsNull o, collector
  collector << 'COALESCE('
  collector = visit o.left, collector
  collector << ','
  if o.right.is_a?(Arel::Attributes::Attribute)
    collector = visit o.right, collector
  else
    collector << "'#{o.right}'"
  end
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_Trim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/ibm_db.rb', line 11

def visit_ArelExtensions_Nodes_Trim o, collector
  collector << 'LTRIM(RTRIM('
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << '))'
  collector
end