Pgerror Error Column Cannot Be Cast To Type Integer
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Cannot Be Cast Automatically To Type Integer Django
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Column Cannot Be Cast Automatically To Type Integer Postgresql
6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Rails Migrations: tried to change the type of column from string to integer up vote 23 down vote favorite 5 I created a table in my rails app with rails generate migrations command. Here is that specify a using expression to perform the conversion rails migration file: class CreateListings < ActiveRecord::Migration def change create_table :listings do |t| t.string :name t.string :telephone t.string :latitude t.string :longitude t.timestamps end end end Then I wanted to store the latitude and longitude as integers so I tried to run: rails generate migration changeColumnType and the contents of that file are: class ChangeColumnType < ActiveRecord::Migration def up #change latitude columntype from string to integertype change_column :listings, :latitude, :integer change_column :listings, :longitude, :integer #change longitude columntype from string to integer type end def down end end I was expecting the column type to change however the rake was aborted and the following error message appeared. I was wondering why this did not go through? Im using postgresql in my app. rake db:migrate == ChangeColumnType: migrating =============================================== -- change_column(:listings, :latitude, :integer) rake aborted! An error has occurred, this and all later migrations canceled: PG::Error: ERROR: column "latitude" cannot be cast to type integer : ALTER TABLE "listings" ALTER COLUMN "latitude" TYPE integer Tasks
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Rails Change Column Type String To Integer
company Business Learn more about hiring developers or posting ads with us Stack Overflow postgres using cast Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 cannot be cast automatically to type json million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Change type of varchar field to integer: “cannot be cast automatically to type integer” up vote 81 down vote http://stackoverflow.com/questions/10343383/rails-migrations-tried-to-change-the-type-of-column-from-string-to-integer favorite 28 I have a small table and a certain field contains the type "character varying". I'm trying to change it to "Integer" but it gives an error that casting is not possible. Is there a way around this or should I just create another table and bring the records into it using a query. The field contains only integer values. postgresql casting postgresql-9.1 fieldtype share|improve this question edited Mar 7 '14 at http://stackoverflow.com/questions/13170570/change-type-of-varchar-field-to-integer-cannot-be-cast-automatically-to-type-i 19:00 Tshepang 4,7061059103 asked Nov 1 '12 at 3:33 itsols 2,31242461 What specific ALTER TABLE did you try and what was the specific error message? –mu is too short Nov 1 '12 at 3:38 @muistooshort I tried using alter from phppgadmin. Selected the column and tried to input the new field type. The error is: SQL error: ERROR: column "MID" cannot be cast to type integer –itsols Nov 1 '12 at 3:42 3 First is to backup table. Then you may create an another column (say field2) of integer type in the same table. Select the cast to integer value of the field1 into field2 . Then rename the column. –Igor Nov 1 '12 at 3:42 @Igor but the new column falls at the end of the table right? Can't I have it in the same position? –itsols Nov 1 '12 at 3:43 1 @itsols Caring about column positions is usually a sign of iffy application design. You almost always want to be using explicitly named columns and SELECT lists, not relying on column ordinal positions. That said, the approach given in the answers will preserve column position. –Craig Ringer Nov 1 '12 at 3:51 | show 2 more comments 5 Answers 5 active oldest votes up vote 12
varchar to integer I ran into a problem. [code lang=text] SQLSTATE[42804]: Datatype mismatch: 7 ERROR: default for column "column_name" cannot be cast to type integer [/code] The solution I could http://antler.co.za/2014/10/postgresql-datatype-mismatch-default-for-column-cannot-be-cast-to-type-integer/ find on (Stackoverflow)[http://stackoverflow.com/questions/13170570/change-type-of-varchar-field-to-integer-cannot-be-cast-automatically-to-type-i] was not working: [code lang=sql] ALTER TABLE the_table ALTER COLUMN http://webjazz.blogspot.com/2010/03/how-to-alter-columns-in-postgresql.html col_name TYPE integer USING (col_name::integer); [/code] Looking closer at the error I realised - as is often the case - the error was indicating exactly what the problem was. The default of the column could not be converted. Not knowing how to convert the default, I simply changed it to something cannot be that could be converted: [code lang=sql] ALTER TABLE the_table ALTER COLUMN col_name SET DEFAULT 0; [/code] Despite it being a varchar column, the integer value 0 was accepted. After which the earlier CAST worked. casterrorpostgresqlsql Post navigation Previous PostInstall Debian wheezy-backports repositoryNext PostHow to install and package Frei0r plugins using FPM Leave a Reply Cancel reply Your email address will not be published. Required fields cannot be cast are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email. Everything is as it should be Search for: Recent Posts Installing Vagrant VirtualBox Guest Additions plugin on Linux Mint Debian Edition How to install and package Frei0r plugins using FPM Postgresql Datatype mismatch default for column cannot be cast to type integer Install Debian wheezy-backports repository Elasticsearch Talk at Annual PHP Cape Town Conference Recent Commentssumant on Install Node.js & NPM on Debian Stable (Wheezy / 7)CokoTracy Mirindi on Install Node.js & NPM on Debian Stable (Wheezy / 7)Tin Tran on SQL - Find the last DISTINCT itemszverty on Install Node.js & NPM on Debian Stable (Wheezy / 7)hasylle on Install Node.js & NPM on Debian Stable (Wheezy / 7)Archives May 2015 January 2015 October 2014 September 2014 July 2014 June 2014 April 2014 November 2013 October 2013 November 2009 July 2009 May 2009 April 2009 October 2008 May 2007 Categories ActionScript Android Bash Database Elasticsearch Events Linux Missing Handbook Node.js Packages PHP Postgresql Programming SQL Vagrant Web Development Meta Log in Entries RSS Comments RSS WordPress.org Proudly powered by WordPress
say you have a migration to do where you need to change a column from an integer to a boolean. So if you're doing a rails migration, you might write something likeAnd then postgresql throws up (well, it does on Rails 2.3.5): == ChangeDatatableAttributes: migrating ======================================-- change_column(:datatables, :is_numeric, :boolean)rake aborted!An error has occurred, this and all later migrations canceled:PGError: ERROR: column "is_numeric" cannot be cast to type boolean: ALTER TABLE "datatables" ALTER COLUMN "is_numeric" TYPE boolean Well, that's no good. The web was not exactly much help here, but I managed to find this in the postgresql docs: the USING expression is not applied to the column's default value (if any); the result might not be a constant expression as required for a default. This means that when there is no implicit or assignment cast from old to new type, ALTER TYPE might fail to convert the default even though a USING clause is supplied. via postgresql.org Looks like you need to drop the default also, and then set it afterwards.Or if you'd like, create a method that you can throw into a module to mixin. And use it like so: Or if all else fails, you can just follow Heroku's advice and just drop the column and create another. Tip! Posted via web from The Web and all that Jazz Posted by Wil C at 11:06 PM 3 comments: Shrikant11:19 PMThere is one simple solution to alter table1. For changing type of column:class AlterUserColumn < ActiveRecord::Migration def self.up change_column :users, :admin, :integer, :default=>nil end def self.down endend2.To Alter whole table structure :class AlterUserColumn < ActiveRecord::Migration def self.up execute 'SIMPLE mysql alter query' end def self.down execute 'opposite query to above written query' endendReplyDeleteChip Castle6:33 PMGreat post! Thanks for the help.ReplyDeleteEndel Dreyer9:52 AMTo check for Postgres adapter you may do that:> ActiveRecord::Base.retrieve_connection.kind_of?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter)=> trueReplyDeleteAdd commentLoad more... Newer Post » « Older Post Home Subscribe to: Post Comments (Atom) About Me Wil C A startupper talking about programming languages, technology, and the web. You can reach me at iamwil@gmail.com Follow me on Twitter stackoverflow resume View my complete profile Karma -From a new search engine Github repos Twitter Blog Archive ▼ 2010 (48) ► September (2) ► August (5) ► July (3) ► June (6) ► May (3) ► April (7) ▼ March (4) The emergence of dude