6.5.7 mysqlshow — Display Database, Table, and Column Information (original) (raw)

6.5.7 mysqlshow — Display Database, Table, and Column Information

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 15.7.7, “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:

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 6.2.2.2, “Using Option Files”.

• --help,-?

  Command-Line Format	--help
  Display a help message and exit.

• --bind-address=ip_address

  Command-Line Format	--bind-address=ip_address
  On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server.

• --character-sets-dir=dir_name

  Command-Line Format	--character-sets-dir=path
  Type	String
  Default Value	[none]
  The directory where character sets are installed. SeeSection 12.15, “Character Set Configuration”.

• --compress,-C

  Command-Line Format	--compress[={OFF|ON}]
  Deprecated	8.0.18
  Type	Boolean
  Default Value	OFF
  Compress all information sent between the client and the server if possible. SeeSection 6.2.8, “Connection Compression Control”.
  As of MySQL 8.0.18, this option is deprecated. Expect it to be removed in a future version of MySQL. SeeConfiguring Legacy Connection Compression.

• --compression-algorithms=value

  Command-Line Format	--compression-algorithms=value
  Introduced	8.0.18
  Type	Set
  Default Value	uncompressed
  Valid Values	zlibzstduncompressed
  The permitted compression algorithms for connections to the server. The available algorithms are the same as for theprotocol_compression_algorithms system variable. The default value isuncompressed.
  For more information, seeSection 6.2.8, “Connection Compression Control”.
  This option was added in MySQL 8.0.18.

• --count

  Command-Line Format	--count
  Show the number of rows per table. This can be slow for non-MyISAM tables.

• --debug[=debug_options],-# [_`debugoptions`_]

  Command-Line Format	--debug[=debug_options]
  Type	String
  Default Value	d:t:o
  Write a debugging log. A typical_debugoptions_ string isd:t:o,_`filename`_. The default is d:t:o.
  This option is available only if MySQL was built usingWITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

• --debug-check

  Command-Line Format	--debug-check
  Type	Boolean
  Default Value	FALSE
  Print some debugging information when the program exits.
  This option is available only if MySQL was built usingWITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

• --debug-info

  Command-Line Format	--debug-info
  Type	Boolean
  Default Value	FALSE
  Print debugging information and memory and CPU usage statistics when the program exits.
  This option is available only if MySQL was built usingWITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

• --default-character-set=charset_name

  Command-Line Format	--default-character-set=charset_name
  Type	String
  Use charsetname as the default character set. See Section 12.15, “Character Set Configuration”.

• --default-auth=plugin

  Command-Line Format	--default-auth=plugin
  Type	String
  A hint about which client-side authentication plugin to use. See Section 8.2.17, “Pluggable Authentication”.

• --defaults-extra-file=file_name

  Command-Line Format	--defaults-extra-file=file_name
  Type	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. If_filename_ is not an absolute path name, it is interpreted relative to the current directory.
  For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

• --defaults-file=file_name

  Command-Line Format	--defaults-file=file_name
  Type	File name
  Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs. If_filename_ is not an absolute path name, it is interpreted relative to the current directory.
  Exception: Even with--defaults-file, client programs read .mylogin.cnf.
  For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

• --defaults-group-suffix=str

  Command-Line Format	--defaults-group-suffix=str
  Type	String
  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 this option is given as--defaults-group-suffix=_other,mysqlshow also reads the[client_other] and[mysqlshow_other] groups.
  For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

• --enable-cleartext-plugin

  Command-Line Format	--enable-cleartext-plugin
  Type	Boolean
  Default Value	FALSE
  Enable the mysql_clear_password cleartext authentication plugin. (SeeSection 8.4.1.4, “Client-Side Cleartext Pluggable Authentication”.)

• --get-server-public-key

  Command-Line Format	--get-server-public-key
  Type	Boolean
  Request from the server the RSA public key that it uses for key pair-based password exchange. This option applies to clients that connect to the server using an account that authenticates with thecaching_sha2_password authentication plugin. For connections by such accounts, the server does not send the public key to the client unless requested. The option is ignored for accounts that do not authenticate with that plugin. It is also ignored if RSA-based password exchange is not needed, as is the case when the client connects to the server using a secure connection.
  If--server-public-key-path=file_name is given and specifies a valid public key file, it takes precedence over--get-server-public-key.
  For information about thecaching_sha2_password plugin, seeSection 8.4.1.2, “Caching SHA-2 Pluggable Authentication”.

• --host=host_name,-h _`hostname`_

  Command-Line Format	--host=host_name
  Type	String
  Default Value	localhost
  Connect to the MySQL server on the given host.

• --keys,-k

  Command-Line Format	--keys
  Show table indexes.

• --login-path=name

  Command-Line Format	--login-path=name
  Type	String
  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 themysql_config_editor utility. SeeSection 6.6.7, “mysql_config_editor — MySQL Configuration Utility”.
  For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

• --no-defaults

  Command-Line Format	--no-defaults
  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 is read in all cases, if it exists. This permits passwords to be specified in a safer way than on the command line even when--no-defaults is used. To create .mylogin.cnf, use themysql_config_editor utility. SeeSection 6.6.7, “mysql_config_editor — MySQL Configuration Utility”.
  For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

• --password[=password],-p[_`password`_]

  Command-Line Format	--password[=password]
  Type	String
  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. SeeSection 8.1.2.1, “End-User Guidelines for Password Security”.
  To explicitly specify that there is no password and thatmysqlshow should not prompt for one, use the--skip-password option.

• --password1[=pass_val]
  The password for multifactor authentication factor 1 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--password1= 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. SeeSection 8.1.2.1, “End-User Guidelines for Password Security”.
  To explicitly specify that there is no password and thatmysqlshow should not prompt for one, use the--skip-password1 option.
  --password1 and--password are synonymous, as are--skip-password1 and--skip-password.
• --password2[=pass_val]
  The password for multifactor authentication factor 2 of the MySQL account used for connecting to the server. The semantics of this option are similar to the semantics for--password1; see the description of that option for details.
• --password3[=pass_val]
  The password for multifactor authentication factor 3 of the MySQL account used for connecting to the server. The semantics of this option are similar to the semantics for--password1; see the description of that option for details.
• --pipe,-W

  Command-Line Format	--pipe
  Type	String
  On Windows, connect to the server using a named pipe. This option applies only if the server was started with thenamed_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 thenamed_pipe_full_access_group system variable.

• --plugin-dir=dir_name

  Command-Line Format	--plugin-dir=dir_name
  Type	Directory name
  The directory in which to look for plugins. Specify this option if the--default-auth option is used to specify an authentication plugin butmysqlshow does not find it. SeeSection 8.2.17, “Pluggable Authentication”.

• --port=port_num,-P _`portnum`_

  Command-Line Format	--port=port_num
  Type	Numeric
  Default Value	3306
  For TCP/IP connections, the port number to use.

• --print-defaults

  Command-Line Format	--print-defaults
  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 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

• --protocol={TCP|SOCKET|PIPE|MEMORY}

  Command-Line Format	--protocol=type
  Type	String
  Default Value	[see text]
  Valid Values	TCPSOCKETPIPEMEMORY
  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, seeSection 6.2.7, “Connection Transport Protocols”.

• --server-public-key-path=file_name

  Command-Line Format	--server-public-key-path=file_name
  Type	File name
  The path name to a file in PEM format containing a client-side copy of the public key required by the server for RSA key pair-based password exchange. This option applies to clients that authenticate with thesha256_password orcaching_sha2_password authentication plugin. This option is ignored for accounts that do not authenticate with one of those plugins. It is also ignored if RSA-based password exchange is not used, as is the case when the client connects to the server using a secure connection.
  If--server-public-key-path=file_name is given and specifies a valid public key file, it takes precedence over--get-server-public-key.
  For sha256_password, this option applies only if MySQL was built using OpenSSL.
  For information about the sha256_password and caching_sha2_password plugins, seeSection 8.4.1.3, “SHA-256 Pluggable Authentication”, andSection 8.4.1.2, “Caching SHA-2 Pluggable Authentication”.

• --shared-memory-base-name=name

  Command-Line Format	--shared-memory-base-name=name
  Platform Specific	Windows
  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 theshared_memory system variable enabled to support shared-memory connections.

• --show-table-type,-t

  Command-Line Format	--show-table-type
  Show a column indicating the table type, as inSHOW FULL TABLES. The type is BASE TABLE or VIEW.

• --socket=path,-S _`path`_

  Command-Line Format	--socket={file_name|pipe_name}
  Type	String
  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 thenamed_pipe_full_access_group system variable.

• --ssl*
  Options that begin with --ssl specify whether to connect to the server using encryption and indicate where to find SSL keys and certificates. SeeCommand Options for Encrypted Connections.
• --ssl-fips-mode={OFF|ON|STRICT}
  | Command-Line Format | --ssl-fips-mode={OFF|ON|STRICT} |
  | ------------------- | --------------------------------- |
  | Deprecated | 8.0.34 |
  | Type | Enumeration |
  | Default Value | OFF |
  | Valid Values | OFFONSTRICT |
  Controls whether to enable FIPS mode on the client side. The--ssl-fips-mode option differs from other--ssl-_`xxx`_ options in that it is not used to establish encrypted connections, but rather to affect which cryptographic operations to permit. See Section 8.8, “FIPS Support”.
  These --ssl-fips-mode values are permitted:
  • OFF: Disable FIPS mode.
  • ON: Enable FIPS mode.
  • STRICT: Enable “strict” FIPS mode.
    Note
    If the OpenSSL FIPS Object Module is not available, the only permitted value for--ssl-fips-mode isOFF. In this case, setting--ssl-fips-mode toON or STRICT causes the client to produce a warning at startup and to operate in non-FIPS mode.
    As of MySQL 8.0.34, this option is deprecated. Expect it to be removed in a future version of MySQL.
• --status,-i

  Command-Line Format	--status
  Display extra information about each table.

• --tls-ciphersuites=ciphersuite_list

  Command-Line Format	--tls-ciphersuites=ciphersuite_list
  Introduced	8.0.16
  Type	String
  The permissible ciphersuites for encrypted connections that use TLSv1.3. The value is a list of one or more colon-separated ciphersuite names. The ciphersuites that can be named for this option depend on the SSL library used to compile MySQL. For details, seeSection 8.3.2, “Encrypted Connection TLS Protocols and Ciphers”.
  This option was added in MySQL 8.0.16.

• --tls-version=protocol_list

  Command-Line Format	--tls-version=protocol_list
  Type	String
  Default Value (≥ 8.0.16)	TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 (OpenSSL 1.1.1 or higher)TLSv1,TLSv1.1,TLSv1.2 (otherwise)
  Default Value (≤ 8.0.15)	TLSv1,TLSv1.1,TLSv1.2
  The permissible TLS protocols for encrypted connections. The value is a list of one or more comma-separated protocol names. The protocols that can be named for this option depend on the SSL library used to compile MySQL. For details, seeSection 8.3.2, “Encrypted Connection TLS Protocols and Ciphers”.

• --user=user_name,-u _`username`_

  Command-Line Format	--user=user_name,
  Type	String
  The user name of the MySQL account to use for connecting to the server.

• --verbose,-v

  Command-Line Format	--verbose
  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

  Command-Line Format	--version
  Display version information and exit.

• --zstd-compression-level=level

  Command-Line Format	--zstd-compression-level=#
  Introduced	8.0.18
  Type	Integer
  The compression level to use for connections to the server that use the zstd compression algorithm. The permitted levels are from 1 to 22, with larger values indicating increasing levels of compression. The defaultzstd compression level is 3. The compression level setting has no effect on connections that do not use zstd compression.
  For more information, seeSection 6.2.8, “Connection Compression Control”.
  This option was added in MySQL 8.0.18.