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.

--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.

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

Command-Line Format	`--connect-retries=#`
Type	Integer
Default Value	`12`
Minimum Value	`0`
Maximum Value	`12`

Command-Line Format	`--connect-retry-delay=#`
Type	Integer
Default Value	`5`
Minimum Value	`0`
Maximum Value	`5`

Command-Line Format	`--connect-string=connection_string`
Type	String
Default Value	`[none]`

Command-Line Format	`--core-file`

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

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

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

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

Command-Line Format	`--no-login-paths`

Command-Line Format	`--help`

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

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

Command-Line Format	`--ndb-mgmd-host=connection_string`
Type	String
Default Value	`[none]`

Command-Line Format	`--ndb-nodeid=#`
Type	Integer
Default Value	`[none]`

Command-Line Format	`--ndb-optimized-node-selection`

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

Command-Line Format	`--no-defaults`

Command-Line Format	`--print-defaults`

Command-Line Format	`--usage`

Command-Line Format	`--version`

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