Class: Innodb::DataDictionary

Inherits:
Object
  • Object
show all
Defined in:
lib/innodb/data_dictionary.rb

Defined Under Namespace

Classes: MysqlType, SysColumnsPrimary, SysFieldsPrimary, SysIndexesPrimary, SysTablesId, SysTablesPrimary

Constant Summary collapse

DATA_DICTIONARY_RECORD_DESCRIBERS =

A hash of hashes of table name and index name to describer class.

{
  SYS_TABLES: {
    PRIMARY: SysTablesPrimary,
    ID: SysTablesId,
  }.freeze,
  SYS_COLUMNS: { PRIMARY: SysColumnsPrimary }.freeze,
  SYS_INDEXES: { PRIMARY: SysIndexesPrimary }.freeze,
  SYS_FIELDS: { PRIMARY: SysFieldsPrimary }.freeze,
}.freeze
MYSQL_TYPE =

A hash of MySQL’s internal type system to the stored values for those types, and the ‘external’ SQL type. rubocop:disable Layout/HashAlignment rubocop:disable Layout/CommentIndentation

{
# DECIMAL:      MysqlType.new(value: 0,   type: :DECIMAL),
  TINY:         MysqlType.new(value: 1,   type: :TINYINT),
  SHORT:        MysqlType.new(value: 2,   type: :SMALLINT),
  LONG:         MysqlType.new(value: 3,   type: :INT),
  FLOAT:        MysqlType.new(value: 4,   type: :FLOAT),
  DOUBLE:       MysqlType.new(value: 5,   type: :DOUBLE),
# NULL:         MysqlType.new(value: 6,   type: nil),
  TIMESTAMP:    MysqlType.new(value: 7,   type: :TIMESTAMP),
  LONGLONG:     MysqlType.new(value: 8,   type: :BIGINT),
  INT24:        MysqlType.new(value: 9,   type: :MEDIUMINT),
# DATE:         MysqlType.new(value: 10,  type: :DATE),
  TIME:         MysqlType.new(value: 11,  type: :TIME),
  DATETIME:     MysqlType.new(value: 12,  type: :DATETIME),
  YEAR:         MysqlType.new(value: 13,  type: :YEAR),
  NEWDATE:      MysqlType.new(value: 14,  type: :DATE),
  VARCHAR:      MysqlType.new(value: 15,  type: :VARCHAR),
  BIT:          MysqlType.new(value: 16,  type: :BIT),
  NEWDECIMAL:   MysqlType.new(value: 246, type: :CHAR),
# ENUM:         MysqlType.new(value: 247, type: :ENUM),
# SET:          MysqlType.new(value: 248, type: :SET),
  TINY_BLOB:    MysqlType.new(value: 249, type: :TINYBLOB),
  MEDIUM_BLOB:  MysqlType.new(value: 250, type: :MEDIUMBLOB),
  LONG_BLOB:    MysqlType.new(value: 251, type: :LONGBLOB),
  BLOB:         MysqlType.new(value: 252, type: :BLOB),
# VAR_STRING:   MysqlType.new(value: 253, type: :VARCHAR),
  STRING:       MysqlType.new(value: 254, type: :CHAR),
  GEOMETRY:     MysqlType.new(value: 255, type: :GEOMETRY),
}.freeze
MYSQL_TYPE_BY_VALUE =

A hash of MYSQL_TYPE keys by value :value key.

MYSQL_TYPE.transform_values(&:value).invert.freeze
COLUMN_MTYPE =

A hash of InnoDB’s internal type system to the values stored for each type.

{
  VARCHAR: 1,
  CHAR: 2,
  FIXBINARY: 3,
  BINARY: 4,
  BLOB: 5,
  INT: 6,
  SYS_CHILD: 7,
  SYS: 8,
  FLOAT: 9,
  DOUBLE: 10,
  DECIMAL: 11,
  VARMYSQL: 12,
  MYSQL: 13,
}.freeze
COLUMN_MTYPE_BY_VALUE =

A hash of COLUMN_MTYPE keys by value.

COLUMN_MTYPE.invert.freeze
COLUMN_PRTYPE_FLAG =

A hash of InnoDB ‘precise type’ bitwise flags.

{
  NOT_NULL: 256,
  UNSIGNED: 512,
  BINARY: 1024,
  LONG_TRUE_VARCHAR: 4096,
}.freeze
COLUMN_PRTYPE_FLAG_BY_VALUE =

A hash of COLUMN_PRTYPE keys by value.

COLUMN_PRTYPE_FLAG.invert.freeze
COLUMN_PRTYPE_MYSQL_TYPE_MASK =

The bitmask to extract the MySQL internal type from the InnoDB ‘precise type’.

0xFF
INDEX_TYPE_FLAG =

A hash of InnoDB’s index type flags.

{
  CLUSTERED: 1,
  UNIQUE: 2,
  UNIVERSAL: 4,
  IBUF: 8,
  CORRUPT: 16,
  FTS: 32,
}.freeze
INDEX_TYPE_FLAG_BY_VALUE =

A hash of INDEX_TYPE_FLAG keys by value.

INDEX_TYPE_FLAG.invert.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(system_space) ⇒ DataDictionary

Returns a new instance of DataDictionary.



227
228
229
 
# File 'lib/innodb/data_dictionary.rb', line 227

def initialize(system_space)
  @system_space = system_space
end

Instance Attribute Details

#system_space ⇒ Object (readonly)

Returns the value of attribute system_space.



225
226
227
 
# File 'lib/innodb/data_dictionary.rb', line 225

def system_space
  @system_space
end

Class Method Details

.mtype_prtype_to_data_type(mtype, prtype, len, prec) ⇒ Object

Return a full data type given an mtype and prtype, such as [‘VARCHAR(10)’, :NOT_NULL] or [:INT, :UNSIGNED].



214
215
216
217
218
219
220
221
222
223
 
# File 'lib/innodb/data_dictionary.rb', line 214

def self.mtype_prtype_to_data_type(mtype, prtype, len, prec)
  type = mtype_prtype_to_type_string(mtype, prtype, len, prec)
  raise "Unsupported type (mtype #{mtype}, prtype #{prtype})" unless type

  data_type = [type]
  data_type << :NOT_NULL if prtype & COLUMN_PRTYPE_FLAG[:NOT_NULL] != 0
  data_type << :UNSIGNED if prtype & COLUMN_PRTYPE_FLAG[:UNSIGNED] != 0

  data_type
end

.mtype_prtype_to_type_string(mtype, prtype, len, prec) ⇒ Object

Return the ‘external’ SQL type string (such as ‘VARCHAR’ or ‘INT’) given the stored mtype and prtype from the InnoDB data dictionary. Note that not all types are extractable into fully defined SQL types due to the lossy nature of the MySQL-to-InnoDB interface regarding types.



174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
 
# File 'lib/innodb/data_dictionary.rb', line 174

def self.mtype_prtype_to_type_string(mtype, prtype, len, prec)
  mysql_type = prtype & COLUMN_PRTYPE_MYSQL_TYPE_MASK
  internal_type = MYSQL_TYPE_BY_VALUE[mysql_type]
  external_type = MYSQL_TYPE[internal_type].type

  case external_type
  when :VARCHAR
    # One-argument: length.
    "%s(%i)" % [external_type, len]
  when :FLOAT, :DOUBLE
    # Two-argument: length and precision.
    "%s(%i,%i)" % [external_type, len, prec]
  when :CHAR
    if COLUMN_MTYPE_BY_VALUE[mtype] == :MYSQL
      # When the mtype is :MYSQL, the column is actually
      # stored as VARCHAR despite being a CHAR. This is
      # done for CHAR columns having multi-byte character
      # sets in order to limit size. Note that such data
      # are still space-padded to at least len.
      "VARCHAR(%i)" % [len]
    else
      "CHAR(%i)" % [len]
    end
  when :DECIMAL
    # The DECIMAL type is designated as DECIMAL(M,D)
    # however the M and D definitions are not stored
    # in the InnoDB data dictionary. We need to define
    # the column as something which will extract the
    # raw bytes in order to read the column, but we
    # can't figure out the right decimal type. The
    # len stored here is actually the on-disk storage
    # size.
    "CHAR(%i)" % [len]
  else
    external_type
  end
end

Instance Method Details

#_make_column_description(type, record) ⇒ Object

Produce a Innodb::RecordDescriber-compatible column description given a type (:key, :row) and data dictionary SYS_COLUMNS record.



539
540
541
542
543
544
545
546
547
548
549
550
 
# File 'lib/innodb/data_dictionary.rb', line 539

def _make_column_description(type, record)
  {
    type: type,
    name: record["NAME"],
    description: self.class.mtype_prtype_to_data_type(
      record["MTYPE"],
      record["PRTYPE"],
      record["LEN"],
      record["PREC"]
    ),
  }
end

#clustered_index_name_by_table_name(table_name) ⇒ Object

Return the name of the clustered index (usually ‘PRIMARY’, but not always) for a given table name.



529
530
531
532
533
534
535
 
# File 'lib/innodb/data_dictionary.rb', line 529

def clustered_index_name_by_table_name(table_name)
  table_record = table_by_name(table_name)
  raise "Table #{table_name} not found" unless table_record

  index_record = object_by_two_fields(:each_index, "TABLE_ID", table_record["ID"], "TYPE", 3)
  index_record["NAME"] if index_record
end

#column_by_name(table_name, column_name) ⇒ Object

Lookup a column by table name and column name.



401
402
403
404
405
406
 
# File 'lib/innodb/data_dictionary.rb', line 401

def column_by_name(table_name, column_name)
  table = table_by_name(table_name)
  return unless table

  object_by_two_fields(:each_column, "TABLE_ID", table["ID"], "NAME", column_name)
end

#data_dictionary_index(table_name, index_name) ⇒ Object

Return an Innodb::Index object initialized to the internal data dictionary index with an appropriate record describer so that records can be recursed.



277
278
279
280
281
282
283
284
285
286
287
288
 
# File 'lib/innodb/data_dictionary.rb', line 277

def data_dictionary_index(table_name, index_name)
  table_entry = data_dictionary_indexes[table_name]
  raise "Unknown data dictionary table #{table_name}" unless table_entry

  index_root_page = table_entry[index_name]
  raise "Unknown data dictionary index #{table_name}.#{index_name}" unless index_root_page

  # If we have a record describer for this index, load it.
  record_describer = data_dictionary_index_describer(table_name, index_name)

  system_space.index(index_root_page, record_describer)
end

#data_dictionary_index?(table_name, index_name) ⇒ Boolean

Returns:

  • (Boolean) 


262
263
264
265
266
 
# File 'lib/innodb/data_dictionary.rb', line 262

def data_dictionary_index?(table_name, index_name)
  return unless data_dictionary_table?(table_name)

  DATA_DICTIONARY_RECORD_DESCRIBERS[table_name.to_sym].include?(index_name.to_sym)
end

#data_dictionary_index_describer(table_name, index_name) ⇒ Object 



268
269
270
271
272
 
# File 'lib/innodb/data_dictionary.rb', line 268

def data_dictionary_index_describer(table_name, index_name)
  return unless data_dictionary_index?(table_name, index_name)

  DATA_DICTIONARY_RECORD_DESCRIBERS[table_name.to_sym][index_name.to_sym].new
end

#data_dictionary_index_ids ⇒ Object 



238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
 
# File 'lib/innodb/data_dictionary.rb', line 238

def data_dictionary_index_ids
  return @data_dictionary_index_ids if @data_dictionary_index_ids

  # TODO: This could probably be done a lot more Ruby-like.
  @data_dictionary_index_ids = {}
  data_dictionary_indexes.each do |table, indexes|
    indexes.each do |index, root_page_number|
      root_page = system_space.page(root_page_number)
      next unless root_page

      @data_dictionary_index_ids[root_page.index_id] = {
        table: table,
        index: index,
      }
    end
  end

  @data_dictionary_index_ids
end

#data_dictionary_indexes ⇒ Object

A helper method to reach inside the system space and retrieve the data dictionary index locations from the data dictionary header.



234
235
236
 
# File 'lib/innodb/data_dictionary.rb', line 234

def data_dictionary_indexes
  system_space.data_dictionary_page.data_dictionary_header[:indexes]
end

#data_dictionary_table?(table_name) ⇒ Boolean

Returns:

  • (Boolean) 


258
259
260
 
# File 'lib/innodb/data_dictionary.rb', line 258

def data_dictionary_table?(table_name)
  DATA_DICTIONARY_RECORD_DESCRIBERS.include?(table_name.to_sym)
end

#each_column ⇒ Object

Iterate through the records in the SYS_COLUMNS data dictionary table.



341
342
343
344
345
346
347
348
349
 
# File 'lib/innodb/data_dictionary.rb', line 341

def each_column
  return enum_for(:each_column) unless block_given?

  each_record_from_data_dictionary_index(:SYS_COLUMNS, :PRIMARY) do |record|
    yield record.fields
  end

  nil
end

#each_column_by_table_id(table_id) ⇒ Object

Iterate through all columns in a table by table ID.



479
480
481
482
483
484
485
486
487
 
# File 'lib/innodb/data_dictionary.rb', line 479

def each_column_by_table_id(table_id)
  return enum_for(:each_column_by_table_id, table_id) unless block_given?

  each_column do |record|
    yield record if record["TABLE_ID"] == table_id
  end

  nil
end

#each_column_by_table_name(table_name, &block) ⇒ Object

Iterate through all columns in a table by table name.



490
491
492
493
494
495
496
497
 
# File 'lib/innodb/data_dictionary.rb', line 490

def each_column_by_table_name(table_name, &block)
  return enum_for(:each_column_by_table_name, table_name) unless block_given?
  raise "Table #{table_name} not found" unless (table = table_by_name(table_name))

  each_column_by_table_id(table["ID"], &block)

  nil
end

#each_column_description_by_index_name(table_name, index_name) ⇒ Object

Iterate through Innodb::RecordDescriber-compatible column descriptions for a given index by table name and index name.



554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
 
# File 'lib/innodb/data_dictionary.rb', line 554

def each_column_description_by_index_name(table_name, index_name)
  return enum_for(:each_column_description_by_index_name, table_name, index_name) unless block_given?

  unless (index = index_by_name(table_name, index_name))
    raise "Index #{index_name} for table #{table_name} not found"
  end

  columns_in_index = {}
  each_column_in_index_by_name(table_name, index_name) do |record|
    columns_in_index[record["NAME"]] = 1
    yield _make_column_description(:key, record)
  end

  if (index["TYPE"] & INDEX_TYPE_FLAG[:CLUSTERED]).zero?
    clustered_index_name = clustered_index_name_by_table_name(table_name)

    each_column_in_index_by_name(table_name, clustered_index_name) do |record|
      yield _make_column_description(:row, record)
    end
  else
    each_column_by_table_name(table_name) do |record|
      yield _make_column_description(:row, record) unless columns_in_index.include?(record["NAME"])
    end
  end

  nil
end

#each_column_in_index_by_name(table_name, index_name) ⇒ Object

Iterate through all columns in an index by table name and index name.



500
501
502
503
504
505
506
507
508
 
# File 'lib/innodb/data_dictionary.rb', line 500

def each_column_in_index_by_name(table_name, index_name)
  return enum_for(:each_column_in_index_by_name, table_name, index_name) unless block_given?

  each_field_by_index_name(table_name, index_name) do |record|
    yield column_by_name(table_name, record["COL_NAME"])
  end

  nil
end

#each_column_not_in_index_by_name(table_name, index_name) ⇒ Object

Iterate through all columns not in an index by table name and index name. This is useful when building index descriptions for secondary indexes.



512
513
514
515
516
517
518
519
520
521
522
523
524
525
 
# File 'lib/innodb/data_dictionary.rb', line 512

def each_column_not_in_index_by_name(table_name, index_name)
  return enum_for(:each_column_not_in_index_by_name, table_name, index_name) unless block_given?

  columns_in_index = {}
  each_column_in_index_by_name(table_name, index_name) do |record|
    columns_in_index[record["NAME"]] = 1
  end

  each_column_by_table_name(table_name) do |record|
    yield record unless columns_in_index.include?(record["NAME"])
  end

  nil
end

#each_data_dictionary_index ⇒ Object

Iterate through all data dictionary indexes, yielding the table name, index name, and the index itself as an Innodb::Index.



306
307
308
309
310
311
312
313
314
315
316
317
 
# File 'lib/innodb/data_dictionary.rb', line 306

def each_data_dictionary_index
  return enum_for(:each_data_dictionary_index) unless block_given?

  data_dictionary_indexes.each do |table_name, indexes|
    indexes.each do |index_name, _root_page_number|
      yield table_name, index_name,
        data_dictionary_index(table_name, index_name)
    end
  end

  nil
end

#each_data_dictionary_index_root_page_number ⇒ Object

Iterate through all data dictionary indexes, yielding the table name, index name, and root page number.



292
293
294
295
296
297
298
299
300
301
302
 
# File 'lib/innodb/data_dictionary.rb', line 292

def each_data_dictionary_index_root_page_number
  return enum_for(:each_data_dictionary_index_root_page_number) unless block_given?

  data_dictionary_indexes.each do |table_name, indexes|
    indexes.each do |index_name, root_page_number|
      yield table_name, index_name, root_page_number
    end
  end

  nil
end

#each_field ⇒ Object

Iterate through the records in the SYS_FIELDS data dictionary table.



363
364
365
366
367
368
369
370
371
 
# File 'lib/innodb/data_dictionary.rb', line 363

def each_field
  return enum_for(:each_field) unless block_given?

  each_record_from_data_dictionary_index(:SYS_FIELDS, :PRIMARY) do |record|
    yield record.fields
  end

  nil
end

#each_field_by_index_id(index_id) ⇒ Object

Iterate through all fields in an index by index ID.



456
457
458
459
460
461
462
463
464
 
# File 'lib/innodb/data_dictionary.rb', line 456

def each_field_by_index_id(index_id)
  return enum_for(:each_field_by_index_id, index_id) unless block_given?

  each_field do |record|
    yield record if record["INDEX_ID"] == index_id
  end

  nil
end

#each_field_by_index_name(table_name, index_name, &block) ⇒ Object

Iterate through all fields in an index by index name.



467
468
469
470
471
472
473
474
475
476
 
# File 'lib/innodb/data_dictionary.rb', line 467

def each_field_by_index_name(table_name, index_name, &block)
  return enum_for(:each_field_by_index_name, table_name, index_name) unless block_given?

  index = index_by_name(table_name, index_name)
  raise "Index #{index_name} for table #{table_name} not found" unless index

  each_field_by_index_id(index["ID"], &block)

  nil
end

#each_index ⇒ Object

Iterate through the records in the SYS_INDEXES dictionary table.



352
353
354
355
356
357
358
359
360
 
# File 'lib/innodb/data_dictionary.rb', line 352

def each_index
  return enum_for(:each_index) unless block_given?

  each_record_from_data_dictionary_index(:SYS_INDEXES, :PRIMARY) do |record|
    yield record.fields
  end

  nil
end

#each_index_by_space_id(space_id) ⇒ Object

Iterate through indexes by space ID.



422
423
424
425
426
427
428
429
430
 
# File 'lib/innodb/data_dictionary.rb', line 422

def each_index_by_space_id(space_id)
  return enum_for(:each_index_by_space_id, space_id) unless block_given?

  each_index do |record|
    yield record if record["SPACE"] == space_id
  end

  nil
end

#each_index_by_table_id(table_id) ⇒ Object

Iterate through all indexes in a table by table ID.



433
434
435
436
437
438
439
440
441
 
# File 'lib/innodb/data_dictionary.rb', line 433

def each_index_by_table_id(table_id)
  return enum_for(:each_index_by_table_id, table_id) unless block_given?

  each_index do |record|
    yield record if record["TABLE_ID"] == table_id
  end

  nil
end

#each_index_by_table_name(table_name, &block) ⇒ Object

Iterate through all indexes in a table by table name.



444
445
446
447
448
449
450
451
452
453
 
# File 'lib/innodb/data_dictionary.rb', line 444

def each_index_by_table_name(table_name, &block)
  return enum_for(:each_index_by_table_name, table_name) unless block_given?

  table = table_by_name(table_name)
  raise "Table #{table_name} not found" unless table

  each_index_by_table_id(table["ID"], &block)

  nil
end

#each_record_from_data_dictionary_index(table, index, &block) ⇒ Object

Iterate through records from a data dictionary index yielding each record as a Innodb::Record object.



321
322
323
324
325
326
327
 
# File 'lib/innodb/data_dictionary.rb', line 321

def each_record_from_data_dictionary_index(table, index, &block)
  return enum_for(:each_record_from_data_dictionary_index, table, index) unless block_given?

  data_dictionary_index(table, index).each_record(&block)

  nil
end

#each_table ⇒ Object

Iterate through the records in the SYS_TABLES data dictionary table.



330
331
332
333
334
335
336
337
338
 
# File 'lib/innodb/data_dictionary.rb', line 330

def each_table
  return enum_for(:each_table) unless block_given?

  each_record_from_data_dictionary_index(:SYS_TABLES, :PRIMARY) do |record|
    yield record.fields
  end

  nil
end

#index_by_id(index_id) ⇒ Object

Lookup an index by index ID.



409
410
411
 
# File 'lib/innodb/data_dictionary.rb', line 409

def index_by_id(index_id)
  object_by_field(:each_index, "ID", index_id)
end

#index_by_name(table_name, index_name) ⇒ Object

Lookup an index by table name and index name.



414
415
416
417
418
419
 
# File 'lib/innodb/data_dictionary.rb', line 414

def index_by_name(table_name, index_name)
  table = table_by_name(table_name)
  return unless table

  object_by_two_fields(:each_index, "TABLE_ID", table["ID"], "NAME", index_name)
end

#object_by_field(method, field, value) ⇒ Object

A helper to iterate the method provided and return the first record where the record’s field matches the provided value.



375
376
377
 
# File 'lib/innodb/data_dictionary.rb', line 375

def object_by_field(method, field, value)
  send(method).select { |o| o[field] == value }.first
end

#object_by_two_fields(method, field1, value1, field2, value2) ⇒ Object

A helper to iterate the method provided and return the first record where the record’s fields f1 and f2 match the provided values v1 and v2.



381
382
383
 
# File 'lib/innodb/data_dictionary.rb', line 381

def object_by_two_fields(method, field1, value1, field2, value2)
  send(method).select { |o| o[field1] == value1 && o[field2] == value2 }.first
end

#record_describer_by_index_id(index_id) ⇒ Object

Return an Innodb::RecordDescriber object describing the records in a given index by index ID.



613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
 
# File 'lib/innodb/data_dictionary.rb', line 613

def record_describer_by_index_id(index_id)
  if (dd_index = data_dictionary_index_ids[index_id])
    return data_dictionary_index_describer(dd_index[:table], dd_index[:index])
  end

  unless (index = index_by_id(index_id))
    raise "Index #{index_id} not found"
  end

  unless (table = table_by_id(index["TABLE_ID"]))
    raise "Table #{INDEX['TABLE_ID']} not found"
  end

  record_describer_by_index_name(table["NAME"], index["NAME"])
end

#record_describer_by_index_name(table_name, index_name) ⇒ Object

Return an Innodb::RecordDescriber object describing records for a given index by table name and index name.



584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
 
# File 'lib/innodb/data_dictionary.rb', line 584

def record_describer_by_index_name(table_name, index_name)
  return data_dictionary_index_describer(table_name, index_name) if data_dictionary_index?(table_name, index_name)

  unless (index = index_by_name(table_name, index_name))
    raise "Index #{index_name} for table #{table_name} not found"
  end

  describer = Innodb::RecordDescriber.new

  if (index["TYPE"] & INDEX_TYPE_FLAG[:CLUSTERED]).zero?
    describer.type :secondary
  else
    describer.type :clustered
  end

  each_column_description_by_index_name(table_name, index_name) do |column|
    case column[:type]
    when :key
      describer.key column[:name], *column[:description]
    when :row
      describer.row column[:name], *column[:description]
    end
  end

  describer
end

#table_by_id(table_id) ⇒ Object

Lookup a table by table ID.



386
387
388
 
# File 'lib/innodb/data_dictionary.rb', line 386

def table_by_id(table_id)
  object_by_field(:each_table, "ID", table_id)
end

#table_by_name(table_name) ⇒ Object

Lookup a table by table name.



391
392
393
 
# File 'lib/innodb/data_dictionary.rb', line 391

def table_by_name(table_name)
  object_by_field(:each_table, "NAME", table_name)
end

#table_by_space_id(space_id) ⇒ Object

Lookup a table by space ID.



396
397
398
 
# File 'lib/innodb/data_dictionary.rb', line 396

def table_by_space_id(space_id)
  object_by_field(:each_table, "SPACE", space_id)
end