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Top Forums Shell Programming and Scripting to extract string from main string and string comparison Post 302573874 by vivek d r on Wednesday 16th of November 2011 01:34:52 AM
Old 11-16-2011
Question to extract string from main string and string comparison

continuing from my previous post, whose link is given below as a reference
HTML Code:
https://www.unix.com/shell-programming-scripting/171076-shell-scripting.html#post302573569


consider there is create table commands in a file for eg:

Code:
CREATE TABLE `Blahblahblah` (
`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,
) ENGINE=InnoDB AUTO_INCREMENT=2000 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

like the above block there are many blocks in the file, i mean many create table queries in the file.
i have two doubts which i need help in
1) what i need to do is separate out one create table block based on idetifier such as "create table" which is the start and "ENGINE=" as end and seperate it out and write to a file for processing (which i will be doing in a while loop so that every time a new create table overwrite in that particular file for processing).
2) if i have a string "CREATE TABLE `Blahblahblah`" in a variable how to extract `blahblahblah` and store it in a variable..?

help on these is deeply appreciated
thanks Smilie
 

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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)
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