10-12-2009
Quote:
Originally Posted by
rajeshorpu
Hi,
What does it mean what is n and length in the sample.
Can you be specific please.
Thanks-
Rajesh
n is a variable to store the number of bytes that has been read.
length is a builtin function to get the bytes (length) of the current line.
Beside the length you have to add
1 byte for the
newline.
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LEARN ABOUT CENTOS
mysql_find_rows
MYSQL_FIND_ROWS MySQL Database System MYSQL_FIND_ROWS
NAME
mysql_find_rows - extract SQL statements from files
SYNOPSIS
mysql_find_rows [options] [file_name ...]
DESCRIPTION
mysql_find_rows reads files containing SQL statements and extracts statements that match a given regular expression or that contain USE
db_name or SET statements. The utility was written for use with update log files (as used prior to MySQL 5.0) and as such expects
statements to be terminated with semicolon (;) characters. It may be useful with other files that contain SQL statements as long as
statements are terminated with semicolons.
Invoke mysql_find_rows like this:
shell> mysql_find_rows [options] [file_name ...]
Each file_name argument should be the name of file containing SQL statements. If no file names are given, mysql_find_rows reads the
standard input.
Examples:
mysql_find_rows --regexp=problem_table --rows=20 < update.log
mysql_find_rows --regexp=problem_table update-log.1 update-log.2
mysql_find_rows supports the following options:
o --help, --Information
Display a help message and exit.
o --regexp=pattern
Display queries that match the pattern.
o --rows=N
Quit after displaying N queries.
o --skip-use-db
Do not include USE db_name statements in the output.
o --start_row=N
Start output from this row.
COPYRIGHT
Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the License.
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
at http://dev.mysql.com/doc/.
AUTHOR
Sun Microsystems, Inc. (http://www.mysql.com/).
MySQL 5.1 04/06/2010 MYSQL_FIND_ROWS