Importing data from text files

esempio

mysqlimport provides a command line interface to the LOAD DATA INFILE SQL statement. Most options to mysqlimport correspond directly to the same options to LOAD DATA INFILE. See section 7.18 LOAD DATA INFILE syntax.

mysqlimport is invoked like this:

shell> mysqlimport [options] database textfile1 [textfile2....]

For each text file named on the command line, mysqlimport strips any extension from the filename and uses the result to determine which table to import the file's contents into. For example, files named `patient.txt', `patient.text' and `patient' would all be imported into a table named patient.

mysqlimport supports the following options:

-c, --columns=...

This option takes a comma separated list of field names as an argument. The field list is passed to LOAD DATA INFILE MySQL sql command, which mysqlimport calls MySQL to execute. For more information, please see LOAD DATA INFILE. See section 7.18 LOAD DATA INFILE syntax.

-C, --compress

Compress all information between the client and the server if both support compression.

-#, --debug[=option_string]

Trace usage of the program (for debugging).

-d, --delete

Empty the table before importing the text file.

--fields-terminated-by=...

--fields-enclosed-by=...

--fields-optionally-enclosed-by=...

--fields-escaped-by=...

--lines-terminated-by=...

These options have the same meaning as the corresponding clauses for LOAD DATA INFILE. See section 7.18 LOAD DATA INFILE syntax.

-f, --force

Ignore errors. For example, if a table for a text file doesn't exist, continue processing any remaining files. Without --force, mysqlimport exits if a table doesn't exist.

--help

Display a help message and exit.

-h host_name, --host=host_name

Import data to the MySQL server on the named host. The default host is localhost.

-i, --ignore

See the description for the --replace option.

-l, --lock-tables

Lock ALL tables for writing before processing any text files. This ensures that all tables are synchronized on the server.

-L, --local

Read input files from the client. By default, text files are assumed to be on the server if you connect to localhost (which is the default host).

-pyour_pass, --password[=your_pass]

The password to use when connecting to the server. If you specify no `=your_pass' part, mysqlimport you will be prompted for a password.

-P port_num, --port=port_num

The TCP/IP port number to use for connecting to a host. (This is used for connections to hosts other than localhost, for which Unix sockets are used.)

-r, --replace

The --replace and --ignore options control handling of input records that duplicate existing records on unique key values. If you specify --replace, new rows replace existing rows that have the same unique key value. If you specify --ignore, input rows that duplicate an existing row on a unique key value are skipped. If you don't specify either option, an error occurs when a duplicate key value is found, and the rest of the text file is ignored.

-s, --silent

Silent mode. Write output only when errors occur.

-S /path/to/socket, --socket=/path/to/socket

The socket file to use when connecting to localhost (which is the default host).

-u user_name, --user=user_name

The MySQL user name to use when connecting to the server. The default value is your Unix login name.

-v, --verbose

Verbose mode. Print out more information what the program does.

-V, --version

Print version information and exit.

$ mysql --version
mysql  Ver 9.33 Distrib 3.22.25, for pc-linux-gnu (i686)
$ uname -a
Linux xxx.com 2.2.5-15 #1 Mon Apr 19 22:21:09 EDT 1999 i586 unknown
$ mysql -e 'CREATE TABLE imptest(id INT, n VARCHAR(30))' test
$ ed
a
100     Max Sydow
101     Count Dracula
.
w imptest.txt
32
q
$ od -c imptest.txt
0000000   1   0   0  \t   M   a   x       S   y   d   o   w  \n   1   0
0000020   1  \t   C   o   u   n   t       D   r   a   c   u   l   a  \n
0000040
$ mysqlimport --local test imptest.txt
test.imptest: Records: 2  Deleted: 0  Skipped: 0  Warnings: 0
$ mysql -e 'SELECT * FROM imptest' test
+------+---------------+
| id   | n             |
+------+---------------+
|  100 | Max Sydow     |
|  101 | Count Dracula |
+------+---------------+