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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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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platform::shell

platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4							platform::shell(n)