NDB_DROP_INDEX(1)

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.

The following table includes options that are specific to ndb_drop_index. Additional descriptions follow the table. For options common to most NDB Cluster programs (including ndb_drop_index), see Options Common to NDB Cluster Programs(1).

Table 21.94. This table describes command-line options for the ndb_drop_index program

    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: 5.7.20-ndb-7.5.8
    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, 2017, Oracle and/or its affiliates. All rights reserved.

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/).