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Full Discussion: Sql with shell scripting
Top Forums Shell Programming and Scripting Sql with shell scripting Post 99253 by tmarikle on Wednesday 15th of February 2006 09:38:35 PM
Old 02-15-2006
Quote:
Originally Posted by Manish Jha
There are many ways to do this...
My favorite; the coprocess:

Code:
#! /usr/bin/ksh
sqlplus -s /nolog |&

print -p "
connect un/pw
set pagesize 0 feedback off verify off
select * from sometable;
PROMPT SQL-COMPLETE
"

typeset IFS='
'
while read -p LINE
do
    case $LINE in
        whatever*) ... ;;
        SQL-COMPLETE) break ;;
    esac
done

If you're doing a bulk extract, do not loop through each record, use a .sql script that spools to a file. The loop will be a performance bottleneck.

The advantages are that you maintain one database session that persists over sever queries. Logons take time and PL/SQL packages maintain their session state, which is very useful.
 

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SQL::Translator::Parser::DBIx::Class(3) 		User Contributed Perl Documentation		   SQL::Translator::Parser::DBIx::Class(3)

NAME
SQL::Translator::Parser::DBIx::Class - Create a SQL::Translator schema from a DBIx::Class::Schema instance SYNOPSIS
## Via DBIx::Class use MyApp::Schema; my $schema = MyApp::Schema->connect("dbi:SQLite:something.db"); $schema->create_ddl_dir(); ## or $schema->deploy(); ## Standalone use MyApp::Schema; use SQL::Translator; my $schema = MyApp::Schema->connect; my $trans = SQL::Translator->new ( parser => 'SQL::Translator::Parser::DBIx::Class', parser_args => { package => $schema, add_fk_index => 0, sources => [qw/ Artist CD /], }, producer => 'SQLite', ) or die SQL::Translator->error; my $out = $trans->translate() or die $trans->error; DESCRIPTION
This class requires SQL::Translator installed to work. "SQL::Translator::Parser::DBIx::Class" reads a DBIx::Class schema, interrogates the columns, and stuffs it all in an $sqlt_schema object. Its primary use is in deploying database layouts described as a set of DBIx::Class classes, to a database. To do this, see "deploy" in DBIx::Class::Schema. This can also be achieved by having DBIx::Class export the schema as a set of SQL files ready for import into your database, or passed to other machines that need to have your application installed but don't have SQL::Translator installed. To do this see "create_ddl_dir" in DBIx::Class::Schema. PARSER OPTIONS
add_fk_index Create an index for each foreign key. Enabled by default, as having indexed foreign key columns is normally the sensible thing to do. sources Arguments: @class_names Limit the amount of parsed sources by supplying an explicit list of source names. SEE ALSO
SQL::Translator, DBIx::Class::Schema AUTHORS
See "CONTRIBUTORS" in DBIx::Class. LICENSE
You may distribute this code under the same terms as Perl itself. perl v5.16.2 2012-08-16 SQL::Translator::Parser::DBIx::Class(3)
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