MySQL/Ruby
[Japanese]
This is the MySQL API module for Ruby.
It provides the same functions for Ruby programs that the MySQL C API provides for C programs.
Download
tmtm.org
Requirement
- MySQL 4.0.22/4.1.13/5.0.11
- Ruby 1.8.2
The module may work for other versions, but that has not been verified.
License
This program is under Ruby's license.
Install
1st:
% ruby extconf.rb
or
% ruby extconf.rb --with-mysql-dir=/usr/local/mysql
or
% ruby extconf.rb --with-mysql-config
then
% make
extconf.rb has following options:
- --with-mysql-include=dir
-
MySQL header file directory. Default is /usr/local/include.
- --with-mysql-lib=dir
-
MySQL library directory. Default is /usr/local/lib.
- --with-mysql-dir=dir
-
Same as --with-mysql-include=dir/include,
--with-mysql-lib=dir/lib.
- --with-mysql-config[=/path/to/mysql_config]
-
Get compile-parameter from mysql_config command.
2nd:
% ruby ./test.rb [hostname [user [passwd [dbname [port [socket [flag]]]]]]]
3rd:
# make install
Note
If you get error like 'libmysqlclient not found' when testing,
you need to specify the directory in which the library is
located so that make can find it.
% env LD_RUN_PATH=libmysqlclient.so directory make
Usage
The names of methods provided by this module basically are the
same as the names of the functions in the C API, except that the
Ruby method names do not begin with a 'mysql_' prefix. For
example, the Ruby query() method corresponds to the C API
mysql_query() function. For details on the use of each Ruby
method, see the descriptions of the corresponding C functions in
the MySQL Reference Manual.
Some Ruby methods may be invoked under other names that serve as
equivalent aliases, as noted below.
If an error occurs when a method executes, it raises a
Mysql::Error exception.
Mysql class
CLASS METHODS
- init()
-
It return Mysql object. It not connect to mysqld.
- real_connect(host=nil, user=nil, passwd=nil, db=nil, port=nil, sock=nil, flag=nil)
- connect(host=nil, user=nil, passwd=nil, db=nil, port=nil, sock=nil, flag=nil)
- new(host=nil, user=nil, passwd=nil, db=nil, port=nil, sock=nil, flag=nil)
-
connect to mysqld and return Mysql object.
- escape_string(str)
- quote(str)
-
quote string for insert/update.
- get_client_info()
- client_info()
-
return client version information.
- get_client_version()
- client_version()
-
return client version as number.
- debug(str)
-
same as C API mysql_debug().
OBJECT METHODS
- options(opt, val=nil)
-
same as C API mysql_options().
- real_connect(host=nil, user=nil, passwd=nil, db=nil, port=nil, sock=nil, flag=nil)
- connect(host=nil, user=nil, passwd=nil, db=nil, port=nil, sock=nil, flag=nil)
-
same as Mysql.real_connect().
- affected_rows()
-
return affected rows.
- autocommit(mode)
-
set autocommit mode.
- change_user(user=nil, passwd=nil, db=nil)
-
change user.
- character_set_name()
-
return character set.
- close()
-
close connection.
- commit()
-
commit transaction.
- create_db(db)
-
create database.
- drop_db(db)
-
drop database.
- dump_debug_info()
-
same as C API mysql_dump_debug_info().
- errno()
-
return error number.
- error()
-
return error message.
- escape_string(str)
- quote(str)
-
quote strings for insert/update.
same as C API mysql_real_escape_string().
- field_count()
-
return number of columns of last query.
- get_client_info()
- client_info()
-
return client version information.
- get_client_version()
- client_version()
-
return client version number.
- get_host_info()
- host_info()
-
return connection information.
- get_proto_info()
- proto_info()
-
return connection protocol version.
- get_server_info()
- server_info()
-
return server version information.
- get_server_version()
- server_version()
-
return server version number.
- info()
-
return information of last query.
- insert_id()
-
return last AUTO_INCREMENT value.
- kill(id)
-
kill thread.
- list_dbs(db=nil)
-
return database list.
- list_fields(table, field=nil)
-
return Mysql::Result object.
- list_processes()
-
return Mysql::Result object.
- list_tables(table=nil)
-
return table list Array.
- more_results?()
-
returns true if more results exist from the currently executed query.
- next_result()
-
returns true if more results exist from the currently executed query.
after this, you do store_result() to get result table of query.
- ping()
-
check server.
- prepare(q)
-
- query(q)
- real_query(q)
-
do query and store_result(). return Mysql::Result object.
If query_with_result is false, it does not store_result().
- query(q) {|res| ...}
- real_query(q) {|res| ...}
-
do query and execute block with Mysql::Result object.
if you specify multiple query, then repeat block.
set_server_option(Mysql::OPTION_MULTI_STATEMENTS) is executed automatically.
- refresh(r)
-
flush server log or cache.
- reload()
-
reload access privilege table.
- rollback()
-
rollback transaction.
- select_db(db)
-
select database.
- set_server_option(opt)
-
set option to server.
options is one of Mysql::OPTION_MULTI_STATEMENTS_ON, Mysql::OPTION_MULTI_STATEMENTS_OFF.
- shutdown()
-
shutdown server.
- ssl_set(key=nil, cert=nil, ca=nil, capath=nil, cipher=nil)
-
use SSL.
- stat()
-
return server status.
- stmt_init()
-
return Mysql::Stmt class object.
- store_result()
-
return Mysql::Result object.
- thread_id()
-
retrun thread id.
- use_result()
-
return Mysql::Result object.
- warning_count()
-
return warning count last query.
OBJECT VARIABLES
- query_with_result
-
If true, query() also invokes store_result() and returns a
Mysql::Result object. Default is true.
- reconnect
-
If true, reconnect to server automatically when disconect to server.
Default is false.
Mysql::Result class
OBJECT METHODS
- free()
-
free memory of result table.
- data_seek(offset)
-
seek row.
- fetch_field()
-
return next Mysql::Field object.
- fetch_fields()
-
return Array of Mysql::Field object.
- fetch_field_direct(fieldnr)
-
return Mysql::Field object.
- fetch_lengths()
-
return Array of field length.
- fetch_row()
-
return row as Array.
- fetch_hash(with_table=false)
-
return row as Hash.
If with_table is true, hash key format is "tablename.fieldname".
- field_seek(offset)
-
seek field.
- field_tell()
-
return field position.
- num_fields()
-
return number of fields.
- num_rows()
-
return number of rows.
- row_seek(offset)
-
seek row.
- row_tell()
-
return row position.
ITERATOR
- each() {|x| ...}
-
'x' is array of column values.
- each_hash(with_table=false) {|x| ...}
-
'x' is hash of column values, and the keys are the column names.
Mysql::Field class
OBJECT VARIABLES(read only)
- name
- field name
- table
- table name
- def
- default value
- type
- field type
- length
- field length
- max_length
- max field length
- flags
- field flag
- decimals
- number of decimals
OBJECT METHODS
- hash()
-
return field as Hash.
ex.) obj.name == obj.hash['name']
- is_not_null?()
-
True if this field is defined as NOT NULL.
- is_num?()
-
True if this field type is numeric.
- is_pri_key?()
-
True if this field is a primary key.
- inspect()
-
return "#<Mysql::Field:fieldname>"
Mysql::Stmt class
Example:
my = Mysql.new(hostname, username, password, databasename)
st = my.prepare("insert into tblname (col1,col2,col3) values (?,?,?)")
st.execute("abc",123,Time.now)
st.prepare("select col1,col2,col3 from tblname")
st.execute
st.fetch # => ["abc", 123, #<Mysql::Time:2005-07-24 23:52:55>]
st.close
OBJECT METHODS
- affected_rows()
-
- bind_result(class, ...)
-
- close()
-
- data_seek(offset)
-
- execute(arg, ...)
-
- fetch()
-
Type mapping:
MySQL type | Ruby class
|
---|
TINYINT, SMALLINT, MEDIUMINT, YEAR | Fixnum
|
INT, BIGINT | Fixnum or Bignum
|
FLOAT, DOUBLE | Float
|
DECIMAL | String
|
DATE, DATETIME, TIMESTAMP, TIME | Mysql::Time
|
CHAR, VARCHAR, BINARY, VARBINARY, TINYBLOB, TINYTEXT, TINYBLOB, TINYTEXT, MEDIUMBLOB, MEDIUMTEXT, LONGBLOB, LONGTEXT, ENUM, SET | String
|
NULL | NilClass
|
- field_count()
-
- free_result()
-
- insert_id()
-
- num_rows()
-
- param_count()
-
- prepare(q)
-
- result_metadata()
-
- row_seek(offset)
-
- row_tell()
-
- sqlstate()
-
ITERATOR
- each() {|x| ...}
-
Mysql::Time class
CLASS METHODS
- new(year=0,month=0,day=0,hour=0,minute=0,second=0,neg=false,second_part=0)
-
OBJECT VARIABLES
- year
-
- month
-
- day
-
- hour
-
- minute
-
- second
-
- neg
-
- second_part
-
Mysql::Error class
OBJECT VARIABLES(read only)
- error
- eror message
- errno
- error number
History
- 2005-08-22
-
version 2.7
- add constants for Mysql#options: Mysql::OPT_GUESS_CONNECTION, Mysql::OPT_USE_EMBEDDED_CONNECTION, Mysql::OPT_USE_REMOTE_CONNECTION, Mysql::SET_CLIENT_IP
- test.rb: for 4.0.x, 5.0.x
- 2005-08-16
-
version 2.7-beta3
- add Mysql::Stmt#bind_result
- 2005-08-02
-
version 2.7-beta2
- BUG: mysql.c.in: fetch_hash: nil value doesn't exist in hash. (Thanks Stefan Kaes)
- add constant Mysql::VERSION.
- add Mysql#prepare
- 2005-07-24
-
version 2.7-beta
- add Mysql#stmt_init method
- add Mysql::Stmt, Mysql::Time, Mysql::RowOffset class
- add Mysql::Error#sqlstate method
- change offset value to Mysql::RowOffset object that is used by Mysql::Result#row_seek,row_tell
- 2005-07-31
-
version 2.6.3
- add constant Mysql::VERSION.
- 2005-07-26
-
version 2.6.2
- BUG: mysql.c.in: fetch_hash: nil value doesn't exist in hash. (Thanks Stefan Kaes)
- 2005-06-28
-
version 2.6.1
- mysql.c.in: fix to compile error on MacOSX.
- 2005-04-25
-
version 2.6
- add constants for Mysql#option():
Mysql::OPT_PROTOCOL, Mysql::OPT_READ_TIMEOUT,
Mysql::OPT_WRITE_TIMEOUT, Mysql::SET_CHARSET_DIR,
Mysql::SET_CHARSET_NAME, Mysql::SHARED_MEMORY_BASE_NAME,
Mysql::SECURE_AUTH
- add methods: Mysql#more_results?(), Mysql#next_result(),
Mysql#set_server_option(), Mysql#sqlstate()
- add constants for Mysql#connect():
Mysql::CLIENT_MULTI_STATEMENTS, Mysql::CLIENT_MULTI_RESULTS
- add constants for Mysql#set_server_option():
Mysql::OPTION_MULTI_STATEMENTS_ON,
Mysql::OPTION_MULTI_STATEMENTS_OFF
- add Mysql#query() with block
- add Mysql#reconnect(), Mysql#reconnect=()
- When connection was closed, it don't try to reconnect by default.
- 2005-02-12
-
version 2.5.2
- BUG: Mysql#connect make object to not close. (Thanks Andres Salomon)
- 2004-09-20
-
version 2.5.1
- 2004-08-31
-
version 2.5
- correspond to MySQL 4.1.x.
- change MysqlRes, MysqlField, MysqlError to Mysql::Result, Mysql::Field, Mysql::Error.
- add Mysql.client_version(), Mysql.get_client_version(),
Mysql#client_version(), Mysql#get_client_version(),
Mysql#server_version(), Mysql#get_server_version(),
Mysql#warning_count(), Mysql#commit(), Mysql#rollback(),
Mysql#autocommit().
- add Mysql::Field#is_not_null?(), Mysql::Field#is_pri_key?(),
Mysql::Field#is_num?().
- add MysqlField::TYPE_VAR_STRING.
- 2003-08-10
-
version 2.4.5
- extconf.rb: correspond to MySQL 4.1.
- mysql.c.in: correspond to Ruby 1.8.
- 2003-02-23
-
version 2.4.4a
- make extconf.rb to correspond to Ruby 1.8.0
- 2003-01-29
-
version 2.4.4
- add Mysql::OPT_LOCAL_INFILE.
- add --with-mysql-config option to extconf.rb.
- extconf.rb automatically detect typical library.
- 2003-01-05
-
version 2.4.3c
- modified English README. Thanks to Paul DuBois.
- 2002-12-24
-
version 2.4.3b
- make extconf.rb to correspond to Ruby 1.6.8.
- 2002-11-07
-
version 2.4.3a
- fix bug duplicating constant.
- 2002-09-10
-
version 2.4.3
- for error number with prefix ER_ .
- get error constant from errmsg.h and mysqld_error.h automatically.
- 2002-01-07
-
version 2.4.2
- for MySQL 4.0.
- change `uint' to `unsigned int' (for mswin).
- 2001-12-02
-
version 2.4.1
- remove `extern' (for Cygiwn).
- change option of extconf.rb.
- 2001-10-12
-
version 2.4.0
- for Ruby 1.7.
- add Mysql::debug(), Mysql#change_user(), Mysql#character_set_name(), Mysql#dump_debug_info().
Author
e-mail: TOMITA Masahiro tommy@tmtm.org
http://tmtm.org
TOMITA Masahiro
Last modified: Mon Aug 22 00:20:00 JST 2005