mysqlmetagrep - Online in the Cloud

PROGRAM:

NAME

mysqlmetagrep - Search Database Object Definitions

SYNOPSIS

mysqlmetagrep [options] [pattern | server] ...

DESCRIPTION

This utility searches for objects matching a given pattern on all the servers specified
using instances of the --server option. It produces output that displays the matching
objects. By default, the first nonoption argument is taken to be the pattern unless the
--pattern option is given. If the --pattern option is given, all nonoption arguments are
treated as connection specifications.

Internally, the utility generates an SQL statement for searching the necessary tables in
the INFORMATION_SCHEMA database on the designated servers and executes it in turn before
collecting the result and printing it as a table. Use the --sql option to have the utility
display the statement rather than execute it. This can be useful if you want to feed the
output of the statement to another application such as the mysql monitor.

The MySQL server supports two forms of patterns when matching strings: SQL Simple Patterns
(used with the LIKE operator) and POSIX Regular Expressions (used with the REGEXP
operator).

By default, the utility uses the LIKE operator to match the name (and optionally, the
body) of objects. To use the REGEXP operator instead, use the --regexp option.

Note that since the REGEXP operator does substring searching, it is necessary to anchor
the expression to the beginning of the string if you want to match the beginning of the
string.

To specify how to display output, use one of the following values with the --format
option:

· grid (default)

Display output in grid or table format like that of the mysql monitor.

· csv

Display output in comma-separated values format.

· tab

Display output in tab-separated format.

· vertical

Display output in single-column format like that of the \G command for the mysql
monitor.
SQL Simple Patterns

The simple patterns defined by the SQL standard consist of a string of characters with two
characters that have special meaning: % (percent) matches zero or more characters and _
(underscore) matches exactly one character.

For example:

· 'mats%'

Match any string that starts with 'mats'.

· '%kindahl%'

Match any string containing the word 'kindahl'.

· '%_'

Match any string consisting of one or more characters.
POSIX Regular Expressions

POSIX regular expressions are more powerful than the simple patterns defined in the SQL
standard. A regular expression is a string of characters, optionally containing characters
with special meaning:

· .

Match any character.

· ^

Match the beginning of a string.

· $

Match the end of a string.

· [axy]

Match a, x, or y.

· [a-f]

Match any character in the range a to f (that is, a, b, c, d, e, or f).

· [^axy]

Match any character excepta, x, or y.

· a*

Match a sequence of zero or more a.

· a+

Match a sequence of one or more a.

· a?

Match zero or one a.

· ab|cd

Match ab or cd.

· a{5}

Match five instances of a.

· a{2,5}

Match from two to five instances of a.

· (abc)+

Match one or more repetitions of abc.

This is but a brief set of examples of regular expressions. The full syntax is described
in the MySQL manual[1], but can often be found in regex(7).
OPTIONS

mysqlmetagrep accepts the following command-line options:

· --help

Display a help message and exit.

· --body, -b

Search the body of stored programs (procedures, functions, triggers, and events). The
default is to match only the name.

· --database=<pattern>

Look only in databases matching this pattern.

· --format=<format>, -f<format>

Specify the output display format. Permitted format values are grid, csv, tab, and
vertical. The default is grid.

· --object-types=<types>, --search-objects=<types>

Search only the object types named in types, which is a comma-separated list of one or
more of the values procedure, function, event, trigger, table, and database.

The default is to search in objects of all types.

· --pattern=<pattern>, -e=<pattern>

The pattern to use when matching. This is required when the first nonoption argument
looks like a connection specification rather than a pattern.

If the --pattern option is given, the first nonoption argument is treated as a
connection specifier, not as a pattern.

· --regexp, --basic-regexp, -G

Perform pattern matches using the REGEXP operator. The default is to use LIKE for
matching. This affects the --database and --pattern options.

· --server=<source>

Connection information for a server to search in the format:
<user>[:<passwd>]@<host>[:<port>][:<socket>] or <login-path>[:<port>][:<socket>]. Use
this option multiple times to search multiple servers.

· --sql, --print-sql, -p

Print rather than executing the SQL code that would be executed to find all matching
objects. This can be useful to save the statement for later execution or to use it as
input for other programs.

· --version

Display version information and exit.
NOTES

For the --format option, the permitted values are not case sensitive. In addition, values
may be specified as any unambiguous prefix of a valid value. For example, --format=g
specifies the grid format. An error occurs if a prefix matches more than one valid value.

The path to the MySQL client tools should be included in the PATH environment variable in
order to use the authentication mechanism with login-paths. This will allow the utility to
use the my_print_defaults tools which is required to read the login-path values from the
login configuration file (.mylogin.cnf).
EXAMPLES

Find all objects with a name that matches the pattern 't_' (the letter t followed by any
single character):

$ mysqlmetagrep --pattern="t_" --server=mats@localhost
+------------------------+--------------+--------------+-----------+
| Connection | Object Type | Object Name | Database |
+------------------------+--------------+--------------+-----------+
| mats:*@localhost:3306 | TABLE | t1 | test |
| mats:*@localhost:3306 | TABLE | t2 | test |
| mats:*@localhost:3306 | TABLE | t3 | test |
+------------------------+--------------+--------------+-----------+

To find all object that contain 't2' in the name or the body (for routines, triggers, and
events):

$ mysqlmetagrep -b --pattern="%t2%" --server=mats@localhost:3306
+------------------------+--------------+--------------+-----------+
| Connection | Object Type | Object Name | Database |
+------------------------+--------------+--------------+-----------+
| root:*@localhost:3306 | TRIGGER | tr_foo | test |
| root:*@localhost:3306 | TABLE | t2 | test |
+------------------------+--------------+--------------+-----------+

In the preceding output, the trigger name does not match the pattern, but is displayed
because its body does.

This is the same as the previous example, but using the REGEXP operator. Note that in the
pattern it is not necessary to add wildcards before or after t2:

$ mysqlmetagrep -Gb --pattern="t2" --server=mats@localhost
+------------------------+--------------+--------------+-----------+
| Connection | Object Type | Object Name | Database |
+------------------------+--------------+--------------+-----------+
| root:*@localhost:3306 | TRIGGER | tr_foo | test |
| root:*@localhost:3306 | TABLE | t2 | test |
+------------------------+--------------+--------------+-----------+

COPYRIGHT

NOTES

1. MySQL manual
http://dev.mysql.com/doc/mysql/en/regexp.html

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