6.23 ndb_select_all — Print Rows from an NDB Table

ndb_select_all prints all rows from an NDB table to stdout.

Usage

ndb_select_all -c connection_string tbl_name -d db_name [> file_name]

The following table includes options that are specific to the NDB Cluster native backup restoration program ndb_select_all. Additional descriptions follow the table. For options common to most NDB Cluster programs (including ndb_select_all), see Section 6.29, “Options Common to NDB Cluster Programs — Options Common to NDB Cluster Programs”.

Table 6.18 Command-line options used with the program ndb_select_all

Format	Description	Added, Deprecated, or Removed
--database=dbname, -d	Name of database in which table is found	(Supported in all NDB releases based on MySQL 5.6)
--parallelism=#, -p	Degree of parallelism	(Supported in all NDB releases based on MySQL 5.6)
--lock=#, -l	Lock type	(Supported in all NDB releases based on MySQL 5.6)
--order=index, -o	Sort resultset according to index having this name	(Supported in all NDB releases based on MySQL 5.6)
--descending, -z	Sort resultset in descending order (requires --order)	(Supported in all NDB releases based on MySQL 5.6)
--header, -h	Print header (set to 0|FALSE to disable headers in output)	(Supported in all NDB releases based on MySQL 5.6)
--useHexFormat, -x	Output numbers in hexadecimal format	(Supported in all NDB releases based on MySQL 5.6)
--delimiter=char, -D	Set column delimiter	(Supported in all NDB releases based on MySQL 5.6)
--disk	Print disk references (useful only for Disk Data tables having nonindexed columns)	(Supported in all NDB releases based on MySQL 5.6)
--rowid	Print row ID	(Supported in all NDB releases based on MySQL 5.6)
--gci	Include GCI in output	(Supported in all NDB releases based on MySQL 5.6)
--gci64	Include GCI and row epoch in output	(Supported in all NDB releases based on MySQL 5.6)
--tupscan, -t	Scan in tup order	(Supported in all NDB releases based on MySQL 5.6)
--nodata	Do not print table column data	(Supported in all NDB releases based on MySQL 5.6)

• --database=dbname, -d dbname

  Name of the database in which the table is found. The default value is TEST_DB.

• parallelism=#, -p #

  Specifies the degree of parallelism.

• --lock=lock_type, -l lock_type

  Employs a lock when reading the table. Possible values for lock_type are:

  • 0: Read lock

  • 1: Read lock with hold

  • 2: Exclusive read lock

  There is no default value for this option.

• --order=index_name, -o index_name

  Orders the output according to the index named index_name.

  Note

  This is the name of an index, not of a column, and that the index must have been explicitly named when created.

• --descending, -z

  Sorts the output in descending order. This option can be used only in conjunction with the -o (--order) option.

• --header=FALSE

  Excludes column headers from the output.

• --useHexFormat -x

  Causes all numeric values to be displayed in hexadecimal format. This does not affect the output of numerals contained in strings or datetime values.

• --delimiter=character, -D character

  Causes the character to be used as a column delimiter. Only table data columns are separated by this delimiter.

  The default delimiter is the tab character.

• --disk

  Adds a disk reference column to the output. The column is nonempty only for Disk Data tables having nonindexed columns.

• --rowid

  Adds a ROWID column providing information about the fragments in which rows are stored.

• --gci

  Adds a GCI column to the output showing the global checkpoint at which each row was last updated. See Chapter 3, NDB Cluster Overview, and Section 7.3.2, “NDB Cluster Log Events”, for more information about checkpoints.

• --gci64

  Adds a ROW$GCI64 column to the output showing the global checkpoint at which each row was last updated, as well as the number of the epoch in which this update occurred.

• --tupscan, -t

  Scan the table in the order of the tuples.

• --nodata

  Causes any table data to be omitted.

Sample Output

Output from a MySQL SELECT statement:

mysql> SELECT * FROM ctest1.fish;
+----+-----------+
| id | name      |
+----+-----------+
|  3 | shark     |
|  6 | puffer    |
|  2 | tuna      |
|  4 | manta ray |
|  5 | grouper   |
|  1 | guppy     |
+----+-----------+
6 rows in set (0.04 sec)

Output from the equivalent invocation of ndb_select_all:

shell> ./ndb_select_all -c localhost fish -d ctest1
id      name
3       [shark]
6       [puffer]
2       [tuna]
4       [manta ray]
5       [grouper]
1       [guppy]
6 rows returned
NDBT_ProgramExit: 0 - OK

All string values are enclosed by square brackets ([...]) in the output of ndb_select_all. Now consider the table created and populated as shown here:

CREATE TABLE dogs (
    id INT(11) NOT NULL AUTO_INCREMENT,
    name VARCHAR(25) NOT NULL,
    breed VARCHAR(50) NOT NULL,
    PRIMARY KEY pk (id),
    KEY ix (name)
)
TABLESPACE ts STORAGE DISK
ENGINE=NDBCLUSTER;
INSERT INTO dogs VALUES
    ('', 'Lassie', 'collie'),
    ('', 'Scooby-Doo', 'Great Dane'),
    ('', 'Rin-Tin-Tin', 'Alsatian'),
    ('', 'Rosscoe', 'Mutt');

This demonstrates the use of several additional ndb_select_all options:

shell> ./ndb_select_all -d ctest1 dogs -o ix -z --gci --disk
GCI     id name          breed        DISK_REF
834461  2  [Scooby-Doo]  [Great Dane] [ m_file_no: 0 m_page: 98 m_page_idx: 0 ]
834878  4  [Rosscoe]     [Mutt]       [ m_file_no: 0 m_page: 98 m_page_idx: 16 ]
834463  3  [Rin-Tin-Tin] [Alsatian]   [ m_file_no: 0 m_page: 34 m_page_idx: 0 ]
835657  1  [Lassie]      [Collie]     [ m_file_no: 0 m_page: 66 m_page_idx: 0 ]
4 rows returned
NDBT_ProgramExit: 0 - OK