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Full Discussion: deleting the part of the file(overwrite) using start and end point
Top Forums Shell Programming and Scripting deleting the part of the file(overwrite) using start and end point Post 302580568 by vivek d r on Friday 9th of December 2011 03:15:27 AM
Old 12-09-2011
thanks the code is working :-)... but the thing is i need to validate whether the table exists in the file or not.. if the particular startpoint is not there in the file this sed command should not be executed and flag must be set to 1..
like

Code:
 
if $startpoint exists in the file
then
     sed "/$startpoint/,/$endpoint/ w tmp.sql " < mysql.big
else
      flag=1
fi

thats is i am checking whether the table exists in the file or not...

also i have one more doubt... how to check how many tables present in the file or not.. currently i am using while loop to find it..
Code:
while read line1
do
        if [[ `expr match "$line1" ".*CREATE TABLE.*"` != "0" ]]
        then
                counter1=`expr $counter1 + 1`
        fi
done < onlytables1.sql

but this is consuming time.. is there any one line code to perform this...?

---------- Post updated at 11:52 AM ---------- Previous update was at 11:38 AM ----------

i found out how to find the number of tables (by trial and error ofcourse) :-)
Code:
cat 1.sql | grep -i CREATE | wc | awk -F' ' '{print $1}'

---------- Post updated at 01:45 PM ---------- Previous update was at 11:52 AM ----------

i found out how to find whether table name is there or not.. thanks anyway mirni :-)

Code:
cat testdump1.sql | grep -i "CREATE TABLE \`$tablename\` (" | wc | awk -F' ' '{print $1}'

the output will be 1 if present else 0.. thanks.. i might have few more doubts wil ask you gradually.. :-)
 

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LEARN ABOUT MOJAVE

locale::codes::langvar

Locale::Codes::LangVar(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangVar(3pm)

NAME

       Locale::Codes::LangVar - standard codes for language variation identification

SYNOPSIS

	  use Locale::Codes::LangVar;

	  $lvar = code2langvar('acm');		       # $lvar gets 'Mesopotamian Arabic'
	  $code = langvar2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langvar_codes();
	  @names   = all_langvar_names();

DESCRIPTION

       The "Locale::Codes::LangVar" module provides access to standard codes used for identifying language variations, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language variations. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lvar = code2langvar('en','alpha-2');
	  $lvar = code2langvar('en',LOCALE_CODE_ALPHA_2);

       The codesets currently supported are:

       alpha
	   This is the set of alphanumeric codes from the IANA language registry, such as 'arevela' for Eastern Armenian.

	   This code set is identified with the symbol "LOCALE_LANGVAR_ALPHA".

	   This is the default code set.

ROUTINES

       code2langvar ( CODE [,CODESET] )
       langvar2code ( NAME [,CODESET] )
       langvar_code2code ( CODE ,CODESET ,CODESET2 )
       all_langvar_codes ( [CODESET] )
       all_langvar_names ( [CODESET] )
       Locale::Codes::LangVar::rename_langvar  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangVar::add_langvar  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangVar::delete_langvar  ( CODE [,CODESET] )
       Locale::Codes::LangVar::add_langvar_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangVar::delete_langvar_alias  ( NAME )
       Locale::Codes::LangVar::rename_langvar_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangVar::add_langvar_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangVar::delete_langvar_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2014-01-06					       Locale::Codes::LangVar(3pm)
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