Module: Sequel::SqlAnywhere::DatasetMethods

Includes:
Dataset::ColumnsLimit1
Included in:
JDBC::SqlAnywhere::Dataset, Dataset
Defined in:
lib/sequel/adapters/shared/sqlanywhere.rb

Constant Summary

Constants included from Dataset::ColumnsLimit1

Dataset::ColumnsLimit1::COLUMNS_CLONE_OPTIONS

Instance Method Summary collapse

Methods included from Dataset::ColumnsLimit1

#columns!

Instance Method Details

#complex_expression_sql_append(sql, op, args) ⇒ Object



302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 302

def complex_expression_sql_append(sql, op, args)
  case op
  when :'||'
    super(sql, :+, args)
  when :<<, :>>
    complex_expression_emulate_append(sql, op, args)
  when :LIKE, :"NOT LIKE"
    sql << '('
    literal_append(sql, args[0])
    sql << (op == :LIKE ? ' REGEXP ' : ' NOT REGEXP ')
    pattern = String.new
    last_c = ''
    args[1].each_char do |c|
      if  c == '_' and not pattern.end_with?('\\') and last_c != '\\'
        pattern << '.'
      elsif c == '%' and not pattern.end_with?('\\') and last_c != '\\'
        pattern << '.*'
      elsif c == '[' and not pattern.end_with?('\\') and last_c != '\\'
        pattern << '\['
      elsif c == ']' and not pattern.end_with?('\\') and last_c != '\\'
        pattern << '\]'
      elsif c == '*' and not pattern.end_with?('\\') and last_c != '\\'
        pattern << '\*'
      elsif c == '?' and not pattern.end_with?('\\') and last_c != '\\'
        pattern << '\?'
      else
        pattern << c
      end
      if c == '\\' and last_c == '\\'
        last_c = ''
      else
        last_c = c
      end
    end
    literal_append(sql, pattern)
    sql << " ESCAPE "
    literal_append(sql, "\\")
    sql << ')'
  when :ILIKE, :"NOT ILIKE"
    super(sql, (op == :ILIKE ? :LIKE : :"NOT LIKE"), args)
  when :extract
    sql << 'datepart('
    literal_append(sql, args[0])
    sql << ','
    literal_append(sql, args[1])
    sql << ')'
  else
    super
  end
end

#constant_sql_append(sql, constant) ⇒ Object

Use today() for CURRENT_DATE and now() for CURRENT_TIMESTAMP and CURRENT_TIME



359
360
361
362
363
364
365
366
367
368
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 359

def constant_sql_append(sql, constant)
  case constant
  when :CURRENT_DATE
    sql << 'today()'
  when :CURRENT_TIMESTAMP, :CURRENT_TIME
    sql << 'now()'
  else
    super
  end
end

#convert_smallint_to_boolObject

Whether to convert smallint to boolean arguments for this dataset. Defaults to the IBMDB module setting.



250
251
252
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 250

def convert_smallint_to_bool
  opts.has_key?(:convert_smallint_to_bool) ? opts[:convert_smallint_to_bool] : db.convert_smallint_to_bool
end

#cross_apply(table) ⇒ Object

Uses CROSS APPLY to join the given table into the current dataset.



293
294
295
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 293

def cross_apply(table)
  join_table(:cross_apply, table)
end

#escape_like(string) ⇒ Object

SqlAnywhere uses \ to escape metacharacters, but a ‘]’ should not be escaped



354
355
356
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 354

def escape_like(string)
  string.gsub(/[\\%_\[]/){|m| "\\#{m}"}
end

#into(table) ⇒ Object

Specify a table for a SELECT … INTO query.



371
372
373
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 371

def into(table)
  clone(:into => table)
end

#recursive_cte_requires_column_aliases?Boolean

SqlAnywhere requires recursive CTEs to have column aliases.

Returns:

  • (Boolean)


298
299
300
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 298

def recursive_cte_requires_column_aliases?
  true
end

#supports_cte?(type = :select) ⇒ Boolean

Returns:

  • (Boolean)


259
260
261
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 259

def supports_cte?(type=:select)
  type == :select
end

#supports_grouping_sets?Boolean

SQLAnywhere supports GROUPING SETS

Returns:

  • (Boolean)


264
265
266
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 264

def supports_grouping_sets?
  true
end

#supports_is_true?Boolean

Returns:

  • (Boolean)


276
277
278
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 276

def supports_is_true?
  false
end

#supports_join_using?Boolean

Returns:

  • (Boolean)


280
281
282
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 280

def supports_join_using?
  false
end

#supports_multiple_column_in?Boolean

Returns:

  • (Boolean)


268
269
270
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 268

def supports_multiple_column_in?
  false
end

#supports_where_true?Boolean

Returns:

  • (Boolean)


272
273
274
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 272

def supports_where_true?
  false
end

#supports_window_clause?Boolean

Returns:

  • (Boolean)


284
285
286
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 284

def supports_window_clause?
  true
end

#supports_window_functions?Boolean

Returns:

  • (Boolean)


288
289
290
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 288

def supports_window_functions?
  true
end

#with_convert_smallint_to_bool(v) ⇒ Object

Return a cloned dataset with the convert_smallint_to_bool option set.



255
256
257
# File 'lib/sequel/adapters/shared/sqlanywhere.rb', line 255

def with_convert_smallint_to_bool(v)
  clone(:convert_smallint_to_bool=>v)
end