25.5.25 ndb_select_all — Print Rows from an NDB Table (original) (raw)

25.5.25 ndb_select_all — Print Rows from an NDB Table

ndb_select_all prints all rows from anNDB table tostdout.

Usage

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

Options that can be used with ndb_select_all are shown in the following table. Additional descriptions follow the table.

Table 25.46 Command-line options used with the program ndb_select_all

• --character-sets-dir

  Command-Line Format	--character-sets-dir=path
  Removed	8.0.31
  Directory containing character sets.

• --connect-retries

  Command-Line Format	--connect-retries=#
  Type	Integer
  Default Value	12
  Minimum Value	0
  Maximum Value	12
  Number of times to retry connection before giving up.

• --connect-retry-delay

  Command-Line Format	--connect-retry-delay=#
  Type	Integer
  Default Value	5
  Minimum Value	0
  Maximum Value	5
  Number of seconds to wait between attempts to contact management server.

• --connect-string

  Command-Line Format	--connect-string=connection_string
  Type	String
  Default Value	[none]
  Same as--ndb-connectstring.

• --core-file

  Command-Line Format	--core-file
  Removed	8.0.31
  Write core file on error; used in debugging.

• --database=dbname,-d dbname
  Name of the database in which the table is found. The default value is TEST_DB.
• --descending,-z
  Sorts the output in descending order. This option can be used only in conjunction with the -o (--order) option.
• --defaults-extra-file

  Command-Line Format	--defaults-extra-file=path
  Type	String
  Default Value	[none]
  Read given file after global files are read.

• --defaults-file

  Command-Line Format	--defaults-file=path
  Type	String
  Default Value	[none]
  Read default options from given file only.

• --defaults-group-suffix

  Command-Line Format	--defaults-group-suffix=string
  Type	String
  Default Value	[none]
  Also read groups with concat(group, suffix).

• --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.
• --gci
  Adds a GCI column to the output showing the global checkpoint at which each row was last updated. See Section 25.2, “NDB Cluster Overview”, andSection 25.6.3.2, “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.
• --help

  Command-Line Format	--help
  Display help text and exit.

• --lock=lock_type,-l _`locktype`_
  Employs a lock when reading the table. Possible values for_locktype_ are:
  • 0: Read lock
  • 1: Read lock with hold
  • 2: Exclusive read lock
    There is no default value for this option.
• --login-path

  Command-Line Format	--login-path=path
  Type	String
  Default Value	[none]
  Read given path from login file.

• --header=FALSE
  Excludes column headers from the output.
• --nodata
  Causes any table data to be omitted.
• --ndb-connectstring

  Command-Line Format	--ndb-connectstring=connection_string
  Type	String
  Default Value	[none]
  Set connect string for connecting to ndb_mgmd. Syntax: "[nodeid=id;][host=]hostname[:port]". Overrides entries in NDB_CONNECTSTRING and my.cnf.

• --ndb-mgmd-host

  Command-Line Format	--ndb-mgmd-host=connection_string
  Type	String
  Default Value	[none]
  Same as--ndb-connectstring.

• --ndb-nodeid

  Command-Line Format	--ndb-nodeid=#
  Type	Integer
  Default Value	[none]
  Set node ID for this node, overriding any ID set by--ndb-connectstring.

• --ndb-optimized-node-selection

  Command-Line Format	--ndb-optimized-node-selection
  Removed	8.0.31
  Enable optimizations for selection of nodes for transactions. Enabled by default; use--skip-ndb-optimized-node-selection to disable.

• --no-defaults

  Command-Line Format	--no-defaults
  Do not read default options from any option file other than login file.

• --order=index_name,-o _`indexname`_
  Orders the output according to the index named_indexname_.
  Note
  This is the name of an index, not of a column; the index must have been explicitly named when created.
• parallelism=#,-p #
  Specifies the degree of parallelism.
• --print-defaults

  Command-Line Format	--print-defaults
  Print program argument list and exit.

• --rowid
  Adds a ROWID column providing information about the fragments in which rows are stored.
• --tupscan,-t
  Scan the table in the order of the tuples.
• --usage

  Command-Line Format	--usage
  Display help text and exit; same as--help.

• --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.
• --version

  Command-Line Format	--version
  Display version information and exit.

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 ofndb_select_all:

$> ./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

All string values are enclosed by square brackets ([...]) in the output ofndb_select_all. For another example, 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 additionalndb_select_all options:

$> ./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