Extracting SQL from an EXPORT file

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Subject: Unix Script: IMPSHOW2SQL - Extracting SQL from an EXPORT file
Doc ID: Note:29765.1 Type: SCRIPT
Last Revision Date: 25-APR-2001 Status: PUBLISHED


This is a short script that allows you to extract the SQL from an export
file. It is intended for use on UNIX machines. Instructions are in the
header of the script.

When entering the script ensure:

A> The first line in the file should be a single colon (:)

Please note this is a proto-type script so there may be some statements
in the resultant file that need manual editting.

:
# impshow2sql Tries to convert output of an IMP SHOW=Y command into a
# usage SQL script.
#
# To use:
# Start a Unix script session and import with show=Y thus:
#
# $ imp user/password file=exportfile show=Y log=/tmp/showfile
#
# You now have the SHOW=Y output in /tmp/showfile .
# Run this script against this file thus:
#
# $ ./impshow2sql /tmp/showfile > /tmp/imp.sql
#
# The file /tmp/imp.sql should now contain the main SQL for
# the IMPORT.
# You can edit this as required.
# Note: This script may split lines incorrectly for some statements
# so it is best to check the output.
#
# CONSTRAINT "" problem:
# You can use this script to help get the SQL from an export
# then correct it if it includes bad SQL such as CONSTRAINT "".
# Eg:
# Use the steps above to get a SQL script and then
# $ sed -e 's/CONSTRAINT ""//' infile > outfile
# Now precreate all the objects and import the export file.
#
# Extracting Specific Statements only:
# It is fairly easy to change the script to extract certain statements
# only. For statements you do NOT want to extract change N=1 to N=0
# Eg: To extract CREATE TRIGGER statements only:
# a) Change all lines to set N=0.
# Eg: / \"CREATE / { N=0; }
# This stops CREATE statements being output.
#
# b) Add a line (After the general CREATE line above):
# / \"CREATE TRIGGER/ { N=1; }
# This flags that we SHOULD output CREATE TRIGGER statements.
#
# c) Run the script as described to get CREATE TRIGGER statements.
#

awk ' BEGIN { prev=";" }
/ \"CREATE / { N=1; }
/ \"ALTER / { N=1; }
/ \"ANALYZE / { N=1; }
/ \"GRANT / { N=1; }
/ \"COMMENT / { N=1; }
/ \"AUDIT / { N=1; }
N==1 { printf "\n/\n\n"; N++ }
/\"$/ { prev=""
if (N==0) next;
s=index( $0, "\"" );
if ( s!=0 ) {
printf "%s",substr( $0,s+1,length( substr($0,s+1))-1 )
prev=substr($0,length($0)-1,1 );
}
if (length($0)<78) printf( "\n" );
}' $*