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NDB_SELECT_COUNT

NAME
SYNOPSIS
DESCRIPTION
COPYRIGHT
SEE ALSO
AUTHOR

NAME

ndb_select_count − print row counts for NDB tables

SYNOPSIS

ndb_select_count [−c connection_string] −d db_name tbl_name[ tbl_name2[ ...]]

DESCRIPTION

ndb_select_count prints the number of rows in one or more NDB tables. With a single table, the result is equivalent to that obtained by using the MySQL statement SELECT COUNT(*) FROM tbl_name. Usage

ndb_select_count [−c connection_string] −ddb_name tbl_name[, tbl_name2[, ...]]

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

Table 23.45. Command−line options used with the program ndb_select_count

−−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.

−−defaults−file

Read default options from given file only.

−−defaults−extra−file

Read given file after global files are read.

−−defaults−group−suffix

Also read groups with concat(group, suffix).

−−login−path

Read given path from login file.

−−help

Display help text and exit.

−−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−optimized−node−selection

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

−−ndb−nodeid

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

−−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.

You can obtain row counts from multiple tables in the same database by listing the table names separated by spaces when invoking this command, as shown under Sample Output. Sample Output

shell> ./ndb_select_count −c localhost −d ctest1 fish dogs
6 records in table fish
4 records in table dogs
NDBT_ProgramExit: 0 − OK

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/).