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NDB_DROP_INDEX

NAME
SYNOPSIS
DESCRIPTION
COPYRIGHT
SEE ALSO
AUTHOR

NAME

ndb_drop_index − drop index from an NDB table

SYNOPSIS

ndb_drop_index options

DESCRIPTION

ndb_drop_index drops the specified index from an NDB table. It is recommended that you use this utility only as an example for writing NDB API applications—see the Warning later in this section for details. Usage

ndb_drop_index −c connection_string table_name index −d db_name

The statement shown above drops the index named index from the table in the database.

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

Table 23.32. Command−line options used with the program ndb_drop_index

−−character−sets−dir

Directory containing character sets.

−−connect−retries

Number of times to retry connection before giving up.

−−connect−retry−delay

Number of seconds to wait between attempts to contact management server.

−−connect−string

Same as −−ndb−connectstring.

−−core−file

Write core file on error; used in debugging.

−−database, −d

Name of the database in which the table resides.

−−defaults−extra−file

Read given file after global files are read.

−−defaults−file

Read default options from given file only.

−−defaults−group−suffix

Also read groups with concat(group, suffix).

−−help

Display help text and exit.

−−login−path

Read given path from login file.

−−ndb−connectstring

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

Same as −−ndb−connectstring.

−−ndb−nodeid

Set node ID for this node, overriding any ID set by −−ndb−connectstring.

−−ndb−optimized−node−selection

Enable optimizations for selection of nodes for transactions. Enabled by default; use −−skip−ndb−optimized−node−selection to disable.

−−no−defaults

Do not read default options from any option file other than login file.

−−print−defaults

Print program argument list and exit.

−−usage

Display help text and exit; same as −−help.

−−version

Display version information and exit.

Warning
Operations performed on Cluster table indexes using the NDB API are not visible to MySQL and make the table unusable by a MySQL server
. If you use this program to drop an index, then try to access the table from an SQL node, an error results, as shown here:

shell> ./ndb_drop_index −c localhost dogs ix −d ctest1
Dropping index dogs/idx...OK
NDBT_ProgramExit: 0 − OK
shell> ./mysql −u jon −p ctest1
Enter password: *******
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with −A
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7 to server version: 5.7.35−ndb−7.5.24
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> SHOW TABLES;
+−−−−−−−−−−−−−−−−−−+
| Tables_in_ctest1 |
+−−−−−−−−−−−−−−−−−−+
| a |
| bt1 |
| bt2 |
| dogs |
| employees |
| fish |
+−−−−−−−−−−−−−−−−−−+
6 rows in set (0.00 sec)
mysql> SELECT * FROM dogs;
ERROR 1296 (HY000): Got error 4243 'Index not found' from NDBCLUSTER

In such a case, your only option for making the table available to MySQL again is to drop the table and re−create it. You can use either the SQL statementDROP TABLE or the ndb_drop_table utility (see ndb_drop_table(1)) to drop the table.

COPYRIGHT

Copyright © 1997, 2021, Oracle and/or its affiliates.

This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.

This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO

For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.

AUTHOR

Oracle Corporation (http://dev.mysql.com/).