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MySQL 8.3 Reference Manual  /  ...  /  ndb_select_count — Print Row Counts for NDB Tables

25.5.26 ndb_select_count — Print Row Counts for NDB Tables

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 25.46 Command-line options used with the program ndb_select_count

Format Description Added, Deprecated, or Removed

--connect-retries=#

Number of times to retry connection before giving up

(Supported in all NDB releases based on MySQL 8.3)

--connect-retry-delay=#

Number of seconds to wait between attempts to contact management server

(Supported in all NDB releases based on MySQL 8.3)

--connect-string=connection_string,

-c connection_string

Same as --ndb-connectstring

(Supported in all NDB releases based on MySQL 8.3)

--database=name,

-d name

Name of database in which table is found

(Supported in all NDB releases based on MySQL 8.3)

--defaults-extra-file=path

Read given file after global files are read

(Supported in all NDB releases based on MySQL 8.3)

--defaults-file=path

Read default options from given file only

(Supported in all NDB releases based on MySQL 8.3)

--defaults-group-suffix=string

Also read groups with concat(group, suffix)

(Supported in all NDB releases based on MySQL 8.3)

--help,

-?

Display help text and exit

(Supported in all NDB releases based on MySQL 8.3)

--lock=#,

-l #

Lock type

(Supported in all NDB releases based on MySQL 8.3)

--login-path=path

Read given path from login file

(Supported in all NDB releases based on MySQL 8.3)

--no-login-paths

Do not read login paths from the login path file

(Supported in all NDB releases based on MySQL 8.3)

--ndb-connectstring=connection_string,

-c connection_string

Set connect string for connecting to ndb_mgmd. Syntax: "[nodeid=id;][host=]hostname[:port]". Overrides entries in NDB_CONNECTSTRING and my.cnf

(Supported in all NDB releases based on MySQL 8.3)

--ndb-mgm-tls=level

ndb_mgm client TLS requirement level

ADDED: 8.3.0

--ndb-mgmd-host=connection_string,

-c connection_string

Same as --ndb-connectstring

(Supported in all NDB releases based on MySQL 8.3)

--ndb-nodeid=#

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

(Supported in all NDB releases based on MySQL 8.3)

--ndb-tls-search-path=list

List of directories containing TLS keys and certificates

ADDED: 8.3.0

--no-defaults

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

(Supported in all NDB releases based on MySQL 8.3)

--parallelism=#,

-p #

Degree of parallelism

(Supported in all NDB releases based on MySQL 8.3)

--print-defaults

Print program argument list and exit

(Supported in all NDB releases based on MySQL 8.3)

--usage,

-?

Display help text and exit; same as --help

(Supported in all NDB releases based on MySQL 8.3)

--version,

-V

Display version information and exit

(Supported in all NDB releases based on MySQL 8.3)


  • --character-sets-dir

    Command-Line Format --character-sets-dir=path

    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

    Write core file on error; used in debugging.

  • --defaults-file

    Command-Line Format --defaults-file=path
    Type String
    Default Value [none]

    Read default options from given file only.

  • --defaults-extra-file

    Command-Line Format --defaults-extra-file=path
    Type String
    Default Value [none]

    Read given file after global files are read.

  • --defaults-group-suffix

    Command-Line Format --defaults-group-suffix=string
    Type String
    Default Value [none]

    Also read groups with concat(group, suffix).

  • --login-path

    Command-Line Format --login-path=path
    Type String
    Default Value [none]

    Read given path from login file.

  • --no-login-paths

    Command-Line Format --no-login-paths

    Skips reading options from the login path file.

  • --help

    Command-Line Format --help

    Display help text and exit.

  • --ndb-connectstring

    Command-Line Format --ndb-connectstring=connection_string
    Type String
    Default Value [none]

    Set connection string for connecting to ndb_mgmd. Syntax: [nodeid=id;][host=]hostname[:port]. Overrides entries in NDB_CONNECTSTRING and my.cnf.

  • --ndb-mgm-tls

    Command-Line Format --ndb-mgm-tls=level
    Type Enumeration
    Default Value relaxed
    Valid Values

    relaxed

    strict

    Sets the level of TLS support required to connect to the management server; one of relaxed or strict. relaxed (the default) means that a TLS connection is attempted, but success is not required; strict means that TLS is required to connect.

  • --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

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

  • --ndb-tls-search-path

    Command-Line Format --ndb-tls-search-path=list
    Type Path name
    Default Value (Unix) $HOME/ndb-tls
    Default Value (Windows) $HOMEDIR/ndb-tls

    Specify a list of directories to search for a CA file. On Unix platforms, the directory names are separated by colons (:); on Windows systems, the semicolon character (;) is used as the separator. A directory reference may be relative or absolute; it may contain one or more environment variables, each denoted by a prefixed dollar sign ($), and expanded prior to use.

    Searching begins with the leftmost named directory and proceeds from left to right until a file is found. An empty string denotes an empty search path, which causes all searches to fail. A string consisting of a single dot (.) indicates that the search path limited to the current working directory.

    If no search path is supplied, the compiled-in default value is used. This value depends on the platform used: On Windows, this is \ndb-tls; on other platforms (including Linux), it is $HOME/ndb-tls. This can be overridden by compiling NDB Cluster using -DWITH_NDB_TLS_SEARCH_PATH.

  • --no-defaults

    Command-Line Format --no-defaults

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

  • --print-defaults

    Command-Line Format --print-defaults

    Print program argument list and exit.

  • --usage

    Command-Line Format --usage

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

  • --version

    Command-Line Format --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

$> ./ndb_select_count -c localhost -d ctest1 fish dogs
6 records in table fish
4 records in table dogs

NDBT_ProgramExit: 0 - OK