| Class | Proc | 
| In: | lib/sequel/extensions/sql_expr.rb | 
| Parent: | Object | 
Evaluates the proc as a virtual row block. If a hash or array of two element arrays is returned, they are converted to a Sequel::SQL::BooleanExpression. Otherwise, unless the object returned is already an Sequel::SQL::Expression, convert the object to an Sequel::SQL::GenericComplexExpression.
  proc{a(b)}.sql_expr + 1  # a(b) + 1
  proc{{a=>b}}.sql_expr | true  # (a = b) OR TRUE
  proc{1}.sql_expr + :a  # 1 + a
          
          
    # File lib/sequel/extensions/sql_expr.rb, line 89
89:   def sql_expr
90:     o = Sequel.virtual_row(&self)
91:     if Sequel.condition_specifier?(o)
92:       Sequel::SQL::BooleanExpression.from_value_pairs(o, :AND)
93:     elsif o.is_a?(Sequel::SQL::Expression)
94:       o
95:     else
96:       Sequel::SQL::GenericComplexExpression.new(:NOOP, o)
97:     end
98:   end