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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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DROP 
TRIGGER(7) SQL Commands DROP TRIGGER(7) NAME
DROP TRIGGER - remove a trigger SYNOPSIS
DROP TRIGGER name ON table [ CASCADE | RESTRICT ] INPUTS name The name of an existing trigger. table The name (optionally schema-qualified) of a table. CASCADE Automatically drop objects that depend on the trigger. RESTRICT Refuse to drop the trigger if there are any dependent objects. This is the default. OUTPUTS DROP TRIGGER The message returned if the trigger is successfully dropped. ERROR: DropTrigger: there is no trigger name on relation "table" This message occurs if the trigger specified does not exist. DESCRIPTION
DROP TRIGGER will remove an existing trigger definition. To execute this command the current user must be the owner of the table for which the trigger is defined. EXAMPLES
Destroy the if_dist_exists trigger on table films: DROP TRIGGER if_dist_exists ON films; COMPATIBILITY
SQL92 There is no DROP TRIGGER statement in SQL92. SQL99 The DROP TRIGGER statement in PostgreSQL is incompatible with SQL99. In SQL99, trigger names are not local to tables, so the command is simply DROP TRIGGER name. SEE ALSO
CREATE TRIGGER [create_trigger(7)] SQL - Language Statements 2002-11-22 DROP TRIGGER(7)
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