21.5.26 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 21.42 Command-line options used with the program ndb_select_count

Format	Description	Added, Deprecated, or Removed
`--character-sets-dir=path`	Directory containing character sets	(Supported in all NDB releases based on MySQL 5.7)
`--connect-retries=#`	Number of times to retry connection before giving up	(Supported in all NDB releases based on MySQL 5.7)
`--connect-retry-delay=#`	Number of seconds to wait between attempts to contact management server	(Supported in all NDB releases based on MySQL 5.7)
`--connect-string=connection_string`, `-c connection_string`	Same as --ndb-connectstring	(Supported in all NDB releases based on MySQL 5.7)
`--core-file`	Write core file on error; used in debugging	(Supported in all NDB releases based on MySQL 5.7)
`--database=name`, `-d name`	Name of database in which table is found	(Supported in all NDB releases based on MySQL 5.7)
`--defaults-extra-file=path`	Read given file after global files are read	(Supported in all NDB releases based on MySQL 5.7)
`--defaults-file=path`	Read default options from given file only	(Supported in all NDB releases based on MySQL 5.7)
`--defaults-group-suffix=string`	Also read groups with concat(group, suffix)	(Supported in all NDB releases based on MySQL 5.7)
`--help`, `-?`	Display help text and exit	(Supported in all NDB releases based on MySQL 5.7)
`--lock=#`, `-l #`	Lock type	(Supported in all NDB releases based on MySQL 5.7)
`--login-path=path`	Read given path from login file	(Supported in all NDB releases based on MySQL 5.7)
`--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 5.7)
`--ndb-mgmd-host=connection_string`, `-c connection_string`	Same as --ndb-connectstring	(Supported in all NDB releases based on MySQL 5.7)
`--ndb-nodeid=#`	Set node ID for this node, overriding any ID set by --ndb-connectstring	(Supported in all NDB releases based on MySQL 5.7)
`--ndb-optimized-node-selection`	Enable optimizations for selection of nodes for transactions. Enabled by default; use --skip-ndb-optimized-node-selection to disable	(Supported in all NDB releases based on MySQL 5.7)
`--no-defaults`	Do not read default options from any option file other than login file	(Supported in all NDB releases based on MySQL 5.7)
`--parallelism=#`, `-p #`	Degree of parallelism	(Supported in all NDB releases based on MySQL 5.7)
`--print-defaults`	Print program argument list and exit	(Supported in all NDB releases based on MySQL 5.7)
`--usage`, `-?`	Display help text and exit; same as --help	(Supported in all NDB releases based on MySQL 5.7)
`--version`, `-V`	Display version information and exit	(Supported in all NDB releases based on MySQL 5.7)

--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.
--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 connect string for connecting to ndb_mgmd. Syntax: "[nodeid=id;][host=]hostname[:port]". Overrides entries in NDB_CONNECTSTRING and my.cnf.
--ndb-mgmd-host
Command-Line Format --ndb-mgmd-host=connection_string
Type String
Default Value [none]
Same as --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-nodeid
Command-Line Format --ndb-nodeid=#
Type Integer
Default Value [none]
Set node ID for this node, overriding any ID set by --ndb-connectstring.
--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	`--help`

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

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

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

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

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

NDBT_ProgramExit: 0 - OK