Postgres: Reduce varchar size and truncate

Posted by williamjones on Stack Overflow See other posts from Stack Overflow or by williamjones
Published on 2010-03-17T22:28:15Z Indexed on 2010/03/17 22:31 UTC
Read the original article Hit count: 378

Filed under:

postgresql

|

varchar

|

truncate

I currently have a Postgres 8.4 database that contains a varchar(10000) column. I'd like to change this into a varchar(255) and truncate any data that happens to be too long. How can I do this?

© Stack Overflow or respective owner

Related posts about postgresql

Postgresql fails to start on Ubuntu 10.04.4 LTS

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I installed postgresql 9.2 from add-apt-repository ppa:pitti/postgresql using apt-get install postgresql-9.2 At the end of the install and every time I try to launch postgresql by using the following command /etc/init.d/postgresql start or service postgresql start I get this error: Error:… >>> More
can't install psycopg2 in my env on mac os x lion

as seen on Server Fault - Search for 'Server Fault'
I tried install psycopg2 via pip in my virtual env, but got this error: ld: library not found for -lpq (full log here: http://pastebin.com/XdmGyJ4u ) I tried install postgres 9.1 from .dmg and via port, (gksks)iMac-Alexander:~ lorddaedra$ locate libpq /Developer/SDKs/MacOSX10.7.sdk/usr/include/libpq /Developer/SDKs/MacOSX10… >>> More
Postgresql has broken apt-get on Ubuntu

as seen on Super User - Search for 'Super User'
On ubuntu 12.04, whenever I try to install a package using apt-get I'm greeted by: The following packages have unmet dependencies: postgresql-9.1 : Depends: postgresql-client-9.1 but it is not going to be instal led E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a so lution)… >>> More
Installing PostgreSQL on FreeBSD (with ports)

as seen on Server Fault - Search for 'Server Fault'
Hey everyone, I am trying to install (using ports) PostgreSQL on a virtual server, running FreeBSD. My one question is this: Which of the following should I install? postgresql-contrib postgresql-docs postgresql-jdbc postgresql-libpgeasy postgresql-libpq++ postgresql-libpqxx postgresql-odbc … >>> More
Strange permission errors in new PostgreSQL installation

as seen on Server Fault - Search for 'Server Fault'
A freshly installed PostgreSQL (with configuration overwritten) won't start: $ sudo service postgresql start * Starting PostgreSQL 9.1 database server * Error: could not read /etc/postgresql/9.1/main/postgresql.conf: Permission denied Looks like it should be able to read it though: $ ls -l postgresql… >>> More

Related posts about varchar

varchar(255) to varchar(MAX)

as seen on Stack Overflow - Search for 'Stack Overflow'
Is it possible to change a column type in a MS SQL 2008 database from varchar(255) to varchar(MAX) without having to drop the table and recreate? SQL Server Management Studio throws me an error every time I try to do it using that - but to save myself a headache would be nice to know if I can change… >>> More
find elements of a varchar in another varchar

as seen on Stack Overflow - Search for 'Stack Overflow'
hi, i have a varchar field with the content like these: a,b,c,d e,d,a,c b,q,d,e i need to do a query that select only the rows with the field that has elements equals with an input string. ex input: c,a rows selected: a,b,c,d e,d,a,c is possible without use the OR (field like '%a%' OR field… >>> More
How to concat datatypes like integers(integer with integer) & varchar(varchar with varchar) in mysql

as seen on Stack Overflow - Search for 'Stack Overflow'
How can we concat integers with integers varchar with varchar int with varchar in MySQL ? >>> More
what's wrong with mysql to create very long table fields?

as seen on Stack Overflow - Search for 'Stack Overflow'
mysql> create table balance_sheet( -> Cash_and_cash_equivalents VARCHAR(20), -> Trading_financial_assets VARCHAR(20), -> Note_receivable VARCHAR(20), -> Account_receivable VARCHAR(20), -> Advance_money VARCHAR(20), -> Interest_receivable VARCHAR(20)… >>> More
Android : SQL Lite insertion or create table issue

as seen on Stack Overflow - Search for 'Stack Overflow'
Team, can anyone please help me to understand what could be the problem in the below snippet of code? It fails after insertion 2 and insertion 3 debug statements I have the contentValues in the Array list, I am iterating the arraylist and inserting the content values in to the database. Log.d("database"… >>> More