MySQL 5.6 Reference Manual Including MySQL NDB Cluster 7.3-7.4 Reference Guide
The mysqlshow client can be used to quickly see which databases exist, their tables, or a table's columns or indexes.
mysqlshow provides a command-line interface
to several SQL SHOW
statements.
See Section 13.7.5, “SHOW Statements”. The same information can be obtained
by using those statements directly. For example, you can issue
them from the mysql client program.
Invoke mysqlshow like this:
shell> mysqlshow [options
] [db_name
[tbl_name
[col_name
]]]
If no database is given, a list of database names is shown.
If no table is given, all matching tables in the database are shown.
If no column is given, all matching columns and column types in the table are shown.
The output displays only the names of those databases, tables, or columns for which you have some privileges.
If the last argument contains shell or SQL wildcard characters
(*
, ?
,
%
, or _
), only those names
that are matched by the wildcard are shown. If a database name
contains any underscores, those should be escaped with a
backslash (some Unix shells require two) to get a list of the
proper tables or columns. *
and
?
characters are converted into SQL
%
and _
wildcard
characters. This might cause some confusion when you try to
display the columns for a table with a _
in
the name, because in this case, mysqlshow
shows you only the table names that match the pattern. This is
easily fixed by adding an extra %
last on the
command line as a separate argument.
mysqlshow supports the following options,
which can be specified on the command line or in the
[mysqlshow]
and [client]
groups of an option file. For information about option files
used by MySQL programs, see Section 4.2.2.2, “Using Option Files”.
Table 4.15 mysqlshow Options
Option Name | Description | Introduced |
---|---|---|
--bind-address | Use specified network interface to connect to MySQL Server | |
--compress | Compress all information sent between client and server | |
--count | Show the number of rows per table | |
--debug | Write debugging log | |
--debug-check | Print debugging information when program exits | |
--debug-info | Print debugging information, memory, and CPU statistics when program exits | |
--default-auth | Authentication plugin to use | |
--default-character-set | Specify default character set | |
--defaults-extra-file | Read named option file in addition to usual option files | |
--defaults-file | Read only named option file | |
--defaults-group-suffix | Option group suffix value | |
--enable-cleartext-plugin | Enable cleartext authentication plugin | 5.6.28 |
--help | Display help message and exit | |
--host | Host on which MySQL server is located | |
--keys | Show table indexes | |
--login-path | Read login path options from .mylogin.cnf | |
--no-defaults | Read no option files | |
--password | Password to use when connecting to server | |
--pipe | Connect to server using named pipe (Windows only) | |
--plugin-dir | Directory where plugins are installed | |
--port | TCP/IP port number for connection | |
--print-defaults | Print default options | |
--protocol | Transport protocol to use | |
--secure-auth | Do not send passwords to server in old (pre-4.1) format | 5.6.17 |
--shared-memory-base-name | Shared-memory name for shared-memory connections (Windows only) | |
--show-table-type | Show a column indicating the table type | |
--socket | Unix socket file or Windows named pipe to use | |
--ssl | Enable connection encryption | |
--ssl-ca | File that contains list of trusted SSL Certificate Authorities | |
--ssl-capath | Directory that contains trusted SSL Certificate Authority certificate files | |
--ssl-cert | File that contains X.509 certificate | |
--ssl-cipher | Permissible ciphers for connection encryption | |
--ssl-crl | File that contains certificate revocation lists | |
--ssl-crlpath | Directory that contains certificate revocation-list files | |
--ssl-key | File that contains X.509 key | |
--ssl-mode | Desired security state of connection to server | 5.6.30 |
--ssl-verify-server-cert | Verify host name against server certificate Common Name identity | |
--status | Display extra information about each table | |
--user | MySQL user name to use when connecting to server | |
--verbose | Verbose mode | |
--version | Display version information and exit |
--help
,
-?
Display a help message and exit.
On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server.
The directory where character sets are installed. See Section 10.15, “Character Set Configuration”.
--compress
,
-C
Compress all information sent between the client and the server if possible. See Section 4.2.6, “Connection Compression Control”.
Show the number of rows per table. This can be slow for
non-MyISAM
tables.
--debug[=
,
debug_options
]-#
[
debug_options
]
Write a debugging log. A typical
debug_options
string is
d:t:o,
.
The default is file_name
d:t:o
.
This option is available only if MySQL was built using
WITH_DEBUG
. MySQL release
binaries provided by Oracle are not
built using this option.
Print some debugging information when the program exits.
This option is available only if MySQL was built using
WITH_DEBUG
. MySQL release
binaries provided by Oracle are not
built using this option.
Print debugging information and memory and CPU usage statistics when the program exits.
This option is available only if MySQL was built using
WITH_DEBUG
. MySQL release
binaries provided by Oracle are not
built using this option.
--default-character-set=
charset_name
Use charset_name
as the default
character set. See Section 10.15, “Character Set Configuration”.
A hint about which client-side authentication plugin to use. See Section 6.2.11, “Pluggable Authentication”.
--defaults-extra-file=
file_name
Read this option file after the global option file but (on
Unix) before the user option file. If the file does not
exist or is otherwise inaccessible, an error occurs.
file_name
is interpreted relative
to the current directory if given as a relative path name
rather than a full path name.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
Use only the given option file. If the file does not exist
or is otherwise inaccessible, an error occurs.
file_name
is interpreted relative
to the current directory if given as a relative path name
rather than a full path name.
Exception: Even with
--defaults-file
, client
programs read .mylogin.cnf
.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
Read not only the usual option groups, but also groups with
the usual names and a suffix of
str
. For example,
mysqlshow normally reads the
[client]
and
[mysqlshow]
groups. If the
--defaults-group-suffix=_other
option is given, mysqlshow also reads the
[client_other]
and
[mysqlshow_other]
groups.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
Enable the mysql_clear_password
cleartext
authentication plugin. (See
Section 6.4.1.5, “Client-Side Cleartext Pluggable Authentication”.)
This option was added in MySQL 5.6.28.
--host=
,
host_name
-h
host_name
Connect to the MySQL server on the given host.
--keys
,
-k
Show table indexes.
Read options from the named login path in the
.mylogin.cnf
login path file. A
“login path” is an option group containing
options that specify which MySQL server to connect to and
which account to authenticate as. To create or modify a
login path file, use the
mysql_config_editor utility. See
Section 4.6.6, “mysql_config_editor — MySQL Configuration Utility”.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
Do not read any option files. If program startup fails due
to reading unknown options from an option file,
--no-defaults
can be used
to prevent them from being read.
The exception is that the .mylogin.cnf
file, if it exists, is read in all cases. This permits
passwords to be specified in a safer way than on the command
line even when
--no-defaults
is used.
(.mylogin.cnf
is created by the
mysql_config_editor utility. See
Section 4.6.6, “mysql_config_editor — MySQL Configuration Utility”.)
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--password[=
,
password
]-p[
password
]
The password of the MySQL account used for connecting to the
server. The password value is optional. If not given,
mysqlshow prompts for one. If given,
there must be no space between
--password=
or
-p
and the password following it. If no
password option is specified, the default is to send no
password.
Specifying a password on the command line should be considered insecure. To avoid giving the password on the command line, use an option file. See Section 6.1.2.1, “End-User Guidelines for Password Security”.
To explicitly specify that there is no password and that
mysqlshow should not prompt for one, use
the
--skip-password
option.
--pipe
,
-W
On Windows, connect to the server using a named pipe. This
option applies only if the server was started with the
named_pipe
system variable
enabled to support named-pipe connections. In addition, the
user making the connection must be a member of the Windows
group specified by the
named_pipe_full_access_group
system variable.
The directory in which to look for plugins. Specify this
option if the
--default-auth
option is
used to specify an authentication plugin but
mysqlshow does not find it. See
Section 6.2.11, “Pluggable Authentication”.
--port=
,
port_num
-P
port_num
For TCP/IP connections, the port number to use.
Print the program name and all options that it gets from option files.
For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--protocol={TCP|SOCKET|PIPE|MEMORY}
The transport protocol to use for connecting to the server. It is useful when the other connection parameters normally result in use of a protocol other than the one you want. For details on the permissible values, see Section 4.2.5, “Connection Transport Protocols”.
Do not send passwords to the server in old (pre-4.1) format.
This prevents connections except for servers that use the
newer password format. This option is enabled by default;
use
--skip-secure-auth
to disable it. This option was added in MySQL 5.6.17.
Passwords that use the pre-4.1 hashing method are less secure than passwords that use the native password hashing method and should be avoided. Pre-4.1 passwords are deprecated; expect support for them to be removed in a future MySQL release. For account upgrade instructions, see Section 6.4.1.3, “Migrating Away from Pre-4.1 Password Hashing and the mysql_old_password Plugin”.
This option is deprecated; expect it to be removed in a future release. As of MySQL 5.7.5, it is always enabled and attempting to disable it produces an error.
--shared-memory-base-name=
name
On Windows, the shared-memory name to use for connections
made using shared memory to a local server. The default
value is MYSQL
. The shared-memory name is
case-sensitive.
This option applies only if the server was started with the
shared_memory
system
variable enabled to support shared-memory connections.
Show a column indicating the table type, as in
SHOW FULL
TABLES
. The type is BASE TABLE
or VIEW
.
--socket=
,
path
-S
path
For connections to localhost
, the Unix
socket file to use, or, on Windows, the name of the named
pipe to use.
On Windows, this option applies only if the server was
started with the named_pipe
system variable enabled to support named-pipe connections.
In addition, the user making the connection must be a member
of the Windows group specified by the
named_pipe_full_access_group
system variable.
Options that begin with --ssl
specify
whether to connect to the server using SSL and indicate
where to find SSL keys and certificates. See
Command Options for Encrypted Connections.
--status
,
-i
Display extra information about each table.
--user=
,
user_name
-u
user_name
The user name of the MySQL account to use for connecting to the server.
--verbose
,
-v
Verbose mode. Print more information about what the program does. This option can be used multiple times to increase the amount of information.
--version
,
-V
Display version information and exit.