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Top Forums Shell Programming and Scripting to extract string from main string and string comparison Post 302573926 by vivek d r on Wednesday 16th of November 2011 07:17:44 AM
Old 11-16-2011
my goal is to write a shell script which takes two mysql dump files(one is latest dump which has new changes to be made and other one is older mysql dump) the script compares both the files and and give the delta (that is changed to to be made ) as output. the changes in the sense.. new mysql dump file has two more columns added in the table blahblahblah so the scipt finds out which are the columns missing and from which table and writes alter table query to that particular table. i am stuck in the part where i need to extract table wise from the file and also in comparison between files. right now i have wrote shell script which just prints out lines missing from one file compared to other.. its copy is shown in
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https://www.unix.com/shell-programming-scripting/171076-shell-scripting.html#post302573569

thanks for replying in short time

---------- Post updated at 03:45 PM ---------- Previous update was at 03:41 PM ----------

this is required for my project since currently we use mysql testbench to get this delta changes of database compared to new changes. and use this delta changes file to alter the old database so that it reflects all the new changes. but i want to avoid using testbench for this function and write a shell script which performs its functions.

---------- Post updated at 05:47 PM ---------- Previous update was at 03:45 PM ----------

Quote:
Originally Posted by ahamed101
Whatever you have mentioned can be done, but what is your ultimate goal?...

Code:
table_name=$( awk -F\` '/CREATE TABLE/{print $2}' input_file )

--ahamed
the above query works good thanks.. :-)
consider the below code

Code:
`id` int(11) NOT NULL AUTO_INCREMENT,
`action` enum('Change','Delete','Add','Locked','Unlocked') COLLATE utf8_unicode_ci DEFAULT 'Change',
`date` datetime DEFAULT NULL,

`reserved1` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`reserved2` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`zoneId` int(11) DEFAULT NULL,

these are the column names in the earlier mentioned table. how to extract these column names dynamically cause i want to use it in a function so if i send either
`reserved2` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL
or
`zoneId` int(11) DEFAULT NULL
(the above two line will be stored in the variable.. i am using while loop to read from file so technically in first run one column will be held in $line )
it should extract reserved2 or zoneid respectively.. how to do it..?
 

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SQL::Translator::Parser::PostgreSQL(3pm)		User Contributed Perl Documentation		  SQL::Translator::Parser::PostgreSQL(3pm)

NAME
SQL::Translator::Parser::PostgreSQL - parser for PostgreSQL SYNOPSIS
use SQL::Translator; use SQL::Translator::Parser::PostgreSQL; my $translator = SQL::Translator->new; $translator->parser("SQL::Translator::Parser::PostgreSQL"); DESCRIPTION
The grammar was started from the MySQL parsers. Here is the description from PostgreSQL: Table: (http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createtable.html) CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ] | table_constraint } [, ... ] ) [ INHERITS ( parent_table [, ... ] ) ] [ WITH OIDS | WITHOUT OIDS ] where column_constraint is: [ CONSTRAINT constraint_name ] { NOT NULL | NULL | UNIQUE | PRIMARY KEY | CHECK (expression) | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] and table_constraint is: [ CONSTRAINT constraint_name ] { UNIQUE ( column_name [, ... ] ) | PRIMARY KEY ( column_name [, ... ] ) | CHECK ( expression ) | FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ] [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] Index: (http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createindex.html) CREATE [ UNIQUE ] INDEX index_name ON table [ USING acc_method ] ( column [ ops_name ] [, ...] ) [ WHERE predicate ] CREATE [ UNIQUE ] INDEX index_name ON table [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] ) [ WHERE predicate ] Alter table: ALTER TABLE [ ONLY ] table [ * ] ADD [ COLUMN ] column type [ column_constraint [ ... ] ] ALTER TABLE [ ONLY ] table [ * ] ALTER [ COLUMN ] column { SET DEFAULT value | DROP DEFAULT } ALTER TABLE [ ONLY ] table [ * ] ALTER [ COLUMN ] column SET STATISTICS integer ALTER TABLE [ ONLY ] table [ * ] RENAME [ COLUMN ] column TO newcolumn ALTER TABLE table RENAME TO new_table ALTER TABLE table ADD table_constraint_definition ALTER TABLE [ ONLY ] table DROP CONSTRAINT constraint { RESTRICT | CASCADE } ALTER TABLE table OWNER TO new_owner View table: CREATE [ OR REPLACE ] VIEW view [ ( column name list ) ] AS SELECT query AUTHORS
Ken Y. Clark <kclark@cpan.org>, Allen Day <allenday@ucla.edu>. SEE ALSO
perl(1), Parse::RecDescent. perl v5.14.2 2012-05-01 SQL::Translator::Parser::PostgreSQL(3pm)
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