to extract string from main string and string comparison Post: 302573926

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Top Forums Shell Programming and Scripting to extract string from main string and string comparison Post 302573926 by vivek d r on Wednesday 16th of November 2011 07:17:44 AM

11-16-2011

Registered User

my goal is to write a shell script which takes two mysql dump files(one is latest dump which has new changes to be made and other one is older mysql dump) the script compares both the files and and give the delta (that is changed to to be made ) as output. the changes in the sense.. new mysql dump file has two more columns added in the table blahblahblah so the scipt finds out which are the columns missing and from which table and writes alter table query to that particular table. i am stuck in the part where i need to extract table wise from the file and also in comparison between files. right now i have wrote shell script which just prints out lines missing from one file compared to other.. its copy is shown in

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https://www.unix.com/shell-programming-scripting/171076-shell-scripting.html#post302573569

thanks for replying in short time

---------- Post updated at 03:45 PM ---------- Previous update was at 03:41 PM ----------

this is required for my project since currently we use mysql testbench to get this delta changes of database compared to new changes. and use this delta changes file to alter the old database so that it reflects all the new changes. but i want to avoid using testbench for this function and write a shell script which performs its functions.

---------- Post updated at 05:47 PM ---------- Previous update was at 03:45 PM ----------

Quote:

Originally Posted by ahamed101

Whatever you have mentioned can be done, but what is your ultimate goal?...

Code:

table_name=$( awk -F\` '/CREATE TABLE/{print $2}' input_file )

--ahamed

the above query works good thanks.. :-)
consider the below code

Code:

`id` int(11) NOT NULL AUTO_INCREMENT,
`action` enum('Change','Delete','Add','Locked','Unlocked') COLLATE utf8_unicode_ci DEFAULT 'Change',
`date` datetime DEFAULT NULL,

`reserved1` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`reserved2` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`zoneId` int(11) DEFAULT NULL,

these are the column names in the earlier mentioned table. how to extract these column names dynamically cause i want to use it in a function so if i send either
`reserved2` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL
or
`zoneId` int(11) DEFAULT NULL
(the above two line will be stored in the variable.. i am using while loop to read from file so technically in first run one column will be held in $line )
it should extract reserved2 or zoneid respectively.. how to do it..?

vivek d r

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mysqmail-dovecot-logger(8)				      System Manager's Manual					mysqmail-dovecot-logger(8)

NAME

       mysqmail-dovecot-logger - logs dovecot-imapd and dovecot-pop3d traffic to a mysql database

SYNOPSIS

       mysqmail-dovecot-logger subprogram [ args ...  ]

DESCRIPTION

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       CREATE TABLE IF NOT EXISTS pop_access (
	 id varchar(32) NOT NULL default '',
	 uid int(11) NOT NULL default '65534',
	 gid int(11) NOT NULL default '65534',
	 home varchar(255) NOT NULL default '',
	 shell varchar(255) NOT NULL default '',
	 mbox_host varchar(120) NOT NULL default '',
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	 imap_transfered_bytes int(14) NOT NULL default '0',
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VERSION

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SEE ALSO

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