class Sequel::JDBC::Derby::Dataset

  1. lib/sequel/adapters/jdbc/derby.rb
Superclass: Dataset

Public Instance methods

case_expression_sql_append(sql, ce)

Derby doesn’t support an expression between CASE and WHEN, so remove conditions.

[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
190 def case_expression_sql_append(sql, ce)
191   super(sql, ce.with_merged_expression)
192 end
cast_sql_append(sql, expr, type)

If the type is String, trim the extra spaces since CHAR is used instead of varchar. This can cause problems if you are casting a char/varchar to a string and the ending whitespace is important.

[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
197 def cast_sql_append(sql, expr, type)
198   if type == String
199     sql << "RTRIM("
200     super
201     sql << ')'
202   else
203     super
204   end
205 end
complex_expression_sql_append(sql, op, args)
[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
207 def complex_expression_sql_append(sql, op, args)
208   case op
209   when :%, :'B~'
210     complex_expression_emulate_append(sql, op, args)
211   when :&, :|, :^, :<<, :>>
212     raise Error, "Derby doesn't support the #{op} operator"
213   when :**
214     sql << 'exp('
215     literal_append(sql, args[1])
216     sql << ' * ln('
217     literal_append(sql, args[0])
218     sql << "))"
219   when :extract
220     sql << args[0].to_s << '('
221     literal_append(sql, args[1])
222     sql << ')'
223   else
224     super
225   end
226 end
supports_group_rollup?()

Derby supports GROUP BY ROLLUP (but not CUBE)

[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
229 def supports_group_rollup?
230   true
231 end
supports_is_true?()

Derby does not support IS TRUE.

[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
234 def supports_is_true?
235   false
236 end
supports_merge?()

Derby 10.11+ supports MERGE.

[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
239 def supports_merge?
240   db.svn_version >= 1616546
241 end
supports_multiple_column_in?()

Derby does not support IN/NOT IN with multiple columns

[show source] 
    # File lib/sequel/adapters/jdbc/derby.rb
244 def supports_multiple_column_in?
245   false
246 end