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Top Forums Shell Programming and Scripting Substitution of char with AWK Post 302121449 by cfajohnson on Wednesday 13th of June 2007 10:53:21 PM
Old 06-13-2007
Quote:
Originally Posted by mario dionne
I created a file contains:

create table .....;
create index ....;
create trigger...;

and I want to substitue from my file ; by ;-- from the line where appears create trigger to the end of the file and keep intact the create table step and index in the file.


awk '/CREATE TRIGGER/,/END;/ { gsub(/;/, ";--") print} ' db2look.bk > toto

Regular expressions are case sensitive, and "/END/" is looking for the literal string "END".

Code:
awk '
   /create trigger/ { n = 1 }
   n                { gsub(/;/, ";--")
                      print }
 ' db2look.bk > toto

 

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ALTER 
TRIGGER(7) SQL Commands ALTER TRIGGER(7) NAME
ALTER TRIGGER - change the definition of a trigger SYNOPSIS
ALTER TRIGGER name ON table RENAME TO newname DESCRIPTION
ALTER TRIGGER changes properties of an existing trigger. The RENAME clause changes the name of the given trigger without otherwise changing the trigger definition. You must own the table on which the trigger acts to be allowed to change its properties. PARAMETERS
name The name of an existing trigger to alter. table The name of the table on which this trigger acts. newname The new name for the trigger. NOTES
The ability to temporarily enable or disable a trigger is provided by ALTER TABLE [alter_table(7)], not by ALTER TRIGGER, because ALTER TRIGGER has no convenient way to express the option of enabling or disabling all of a table's triggers at once. EXAMPLES
To rename an existing trigger: ALTER TRIGGER emp_stamp ON emp RENAME TO emp_track_chgs; COMPATIBILITY
ALTER TRIGGER is a PostgreSQL extension of the SQL standard. SEE ALSO
ALTER TABLE [alter_table(7)] SQL - Language Statements 2010-05-14 ALTER TRIGGER(7)
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