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Top Forums Shell Programming and Scripting Extracting few lines from a file based on identifiers dynamically Post 302577014 by vivek d r on Monday 28th of November 2011 03:28:55 AM
Old 11-28-2011
if i have a few lines in a fie.. say

Code:
CREATE TABLE `Table33` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`allianceId` int(11) NOT NULL,
`migratedAt` datetime DEFAULT NULL,
`migrationDetail` text COLLATE utf8_unicode_ci,
`unigyId` int(11) DEFAULT NULL
)

how do i extract datatype of the columns.. here i want to extract datetime, text, int(11) etc etc and store it in a variable dynamically.. i tried
Code:
column_name=$( echo $line22 | awk -F\` '{print $2}' )
           echo "column name is : $column_name"
           data_type==$( echo $line22 | awk -F\` '/$column_name/{print $2}' )
           echo "datatype is : $data_type"

where line22 has one line of the file.. but i am not getting any output...
 

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ALTER 
VIEW(7) PostgreSQL 9.2.7 Documentation ALTER VIEW(7) NAME
ALTER_VIEW - change the definition of a view SYNOPSIS
ALTER VIEW [ IF EXISTS ] name ALTER [ COLUMN ] column_name SET DEFAULT expression ALTER VIEW [ IF EXISTS ] name ALTER [ COLUMN ] column_name DROP DEFAULT ALTER VIEW [ IF EXISTS ] name OWNER TO new_owner ALTER VIEW [ IF EXISTS ] name RENAME TO new_name ALTER VIEW [ IF EXISTS ] name SET SCHEMA new_schema ALTER VIEW [ IF EXISTS ] name SET ( view_option_name [= view_option_value] [, ... ] ) ALTER VIEW [ IF EXISTS ] name RESET ( view_option_name [, ... ] ) DESCRIPTION
ALTER VIEW changes various auxiliary properties of a view. (If you want to modify the view's defining query, use CREATE OR REPLACE VIEW.) You must own the view to use ALTER VIEW. To change a view's schema, you must also have CREATE privilege on the new schema. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have CREATE privilege on the view's schema. (These restrictions enforce that altering the owner doesn't do anything you couldn't do by dropping and recreating the view. However, a superuser can alter ownership of any view anyway.) PARAMETERS
name The name (optionally schema-qualified) of an existing view. IF EXISTS Do not throw an error if the view does not exist. A notice is issued in this case. SET/DROP DEFAULT These forms set or remove the default value for a column. A default value associated with a view column is inserted into INSERT statements on the view before the view's ON INSERT rule is applied, if the INSERT does not specify a value for the column. new_owner The user name of the new owner of the view. new_name The new name for the view. new_schema The new schema for the view. view_option_name The name of a view option to be set or reset. view_option_value The new value for a view option. NOTES
For historical reasons, ALTER TABLE can be used with views too; but the only variants of ALTER TABLE that are allowed with views are equivalent to the ones shown above. EXAMPLES
To rename the view foo to bar: ALTER VIEW foo RENAME TO bar; COMPATIBILITY
ALTER VIEW is a PostgreSQL extension of the SQL standard. SEE ALSO
CREATE VIEW (CREATE_VIEW(7)), DROP VIEW (DROP_VIEW(7)) PostgreSQL 9.2.7 2014-02-17 ALTER VIEW(7)
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