def describe_synonym(schema_name, synonym_name) #:nodoc:
      select_first(
        "SELECT table_owner, table_name FROM all_synonyms WHERE owner = :owner AND synonym_name = :synonym_name",
        schema_name.to_s.upcase, synonym_name.to_s.upcase)
    end
def describe_synonym(schema_name, synonym_name) #:nodoc:
      select_first(
        "SELECT table_owner, table_name FROM all_synonyms WHERE owner = :owner AND synonym_name = :synonym_name",
        schema_name.to_s.upcase, synonym_name.to_s.upcase)
    end
all_synonyms view is quite slow therefore
 this implementation is overriden in OCI connection with faster native OCI method