10-26-2008
awk help required to group output and print a part of group line and original line
Hi,
Need awk help to group and print lines to format the output as shown below
INPUT FORMAT
set echo on
set heading on
set spool on
/* SCHEMA1 */ CREATE TABLE T1;
/* SCHEMA1 */ CREATE TABLE T2;
/* SCHEMA1 */ CREATE TABLE T3;
/* SCHEMA1 */ CREATE TABLE T4;
/* SCHEMA1 */ CREATE TABLE T5;
/* SCHEMA2 */ CREATE TABLE T1;
/* SCHEMA2 */ CREATE TABLE T2;
/* SCHEMA2 */ CREATE TABLE T3;
/* SCHEMA3 */ CREATE TABLE T1;
/* SCHEMA3 */ CREATE TABLE T2;
/* SCHEMA3 */ CREATE TABLE T3;
/* SCHEMA4 */ CREATE TABLE T1;
set feedback on
set spool off
DESIRED OUTPUT
set echo on
set heading on
set spool on
connect SCHEMA1
/* SCHEMA1 */ CREATE TABLE T1;
/* SCHEMA1 */ CREATE TABLE T2;
/* SCHEMA1 */ CREATE TABLE T3;
/* SCHEMA1 */ CREATE TABLE T4;
/* SCHEMA1 */ CREATE TABLE T5;
connect SCHEMA2
/* SCHEMA2 */ CREATE TABLE T1;
/* SCHEMA2 */ CREATE TABLE T2;
/* SCHEMA2 */ CREATE TABLE T3;
connect SCHEMA3
/* SCHEMA3 */ CREATE TABLE T1;
/* SCHEMA3 */ CREATE TABLE T2;
/* SCHEMA3 */ CREATE TABLE T3;
connect SCHEMA4
/* SCHEMA4 */ CREATE TABLE T1;
set feedback on
set spool off
I am looking forward to add the connect lines where all the SQL lines start with /* SCHEMAn */ values as a consistent pattern
i was able to sort the distict values of the pattern using the below awk
nawk '/^\/\* /{dup[$2]++;if (dup[$2]>=1){name[$2]=$2}};END{for(i in name)print name[i]} ' inputfile
Output
-------
SCHEMA1
SCHEMA2
SCHEMA3
SCHEMA4
but i am not sure how to place these lines in before the patterns and skip till the next pattern is found.
Thanks in advance,
Rajan
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LEARN ABOUT SUSE
drop_table
DROP
TABLE(7) SQL Commands DROP TABLE(7)
NAME
DROP TABLE - remove a table
SYNOPSIS
DROP TABLE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
DESCRIPTION
DROP TABLE removes tables from the database. Only its owner can drop a table. To empty a table of rows without destroying the table, use
DELETE [delete(7)] or TRUNCATE [truncate(7)].
DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. However, to drop a table that is
referenced by a view or a foreign-key constraint of another table, CASCADE must be specified. (CASCADE will remove a dependent view
entirely, but in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.)
PARAMETERS
IF EXISTS
Do not throw an error if the table does not exist. A notice is issued in this case.
name The name (optionally schema-qualified) of the table to drop.
CASCADE
Automatically drop objects that depend on the table (such as views).
RESTRICT
Refuse to drop the table if any objects depend on it. This is the default.
EXAMPLES
To destroy two tables, films and distributors:
DROP TABLE films, distributors;
COMPATIBILITY
This command conforms to the SQL standard, except that the standard only allows one table to be dropped per command, and apart from the IF
EXISTS option, which is a PostgreSQL extension.
SEE ALSO
ALTER TABLE [alter_table(7)], CREATE TABLE [create_table(7)]
SQL - Language Statements 2010-05-14 DROP TABLE(7)