ndb_desc1

Describe ndb tables

Usage

ndb_desc options

Overview

ndb_desc provides a detailed description of one or more NDB tables.

Usage:

ndb_desc -c connect_string tbl_name -d db_name

Sample Output:

MySQL table creation and population statements:

USE test;
CREATE TABLE fish (
    id INT(11) NOT NULL AUTO_INCREMENT,
    name VARCHAR(20),
    PRIMARY KEY pk (id),
    UNIQUE KEY uk (name)
) ENGINE=NDBCLUSTER;
INSERT INTO fish VALUES 
    ('','guppy'), ('','tuna'), ('','shark'), 
    ('','manta ray'), ('','grouper'), ('','puffer');

Output from ndb_desc:

shell> ./ndb_desc -c localhost fish -d test -p
-- fish --
Version: 16777221
Fragment type: 5
K Value: 6
Min load factor: 78
Max load factor: 80
Temporary table: no
Number of attributes: 2
Number of primary keys: 1
Length of frm data: 268
Row Checksum: 1
Row GCI: 1
TableStatus: Retrieved
-- Attributes --
id Int PRIMARY KEY DISTRIBUTION KEY AT=FIXED ST=MEMORY
name Varchar(20;latin1_swedish_ci) NULL AT=SHORT_VAR ST=MEMORY
-- Indexes --
PRIMARY KEY(id) - UniqueHashIndex
uk(name) - OrderedIndex
PRIMARY(id) - OrderedIndex
uk$unique(name) - UniqueHashIndex
-- Per partition info --
Partition  Row count  Commit count  Frag fixed memory  Frag varsized memory
2          2          2             65536              327680
1          2          2             65536              327680
3          2          2             65536              327680
NDBT_ProgramExit: 0 - OK

Additional Options:

•

--extra-partition-info, -p

Prints additional information about the table's partitions.

•: Information about multiple tables can be obtained in a single invocation of ndb_desc by using their names, separated by spaces. All of the tables must be in the same database.