postgresql-9.1

This question already has an answer here: Convert hex in text representation to decimal number 5 answers I'd like to convert a hex string as used by HTML into a bigint to then convert it into separate R, G and B values in Postgres via a function written in PL/pgSQL. I can decode the string into bytea like this: hex bytea := decode(hex, 'hex'); And in a query with fixed values this works like a beauty: select ( array[ (cast(x'ffaa33' as bigint) >> 16) % 256, (cast(x'ffaa33' as bigint) >> 8) % 256, cast(x'ffaa33' as bigint) % 256 ] ) But I can't put the two together, passing - for example

I have the following table: CREATE TABLE recipemetadata ( --Lots of columns diet_glutenfree boolean NOT NULL, ); Most every row will be set to FALSE unless someone comes up with some crazy new gluten free diet that sweeps the country. I need to be able to very quickly query for rows where this value is true. I've created the index: CREATE INDEX IDX_RecipeMetadata_GlutenFree ON RecipeMetadata(diet_glutenfree) WHERE diet_glutenfree; It appears to work, however I can't figure out how to tell if indeed it's only indexing rows where the value is true. I want to make sure it's not doing something

I have a Postgres database with a table that contains a timestamp ( timeOfProcessing TIMESTAMP ). I have a Java datetime value ( java.util.Date dateTime ) and want to store its value in that timestamp field (without time zone). When I do it using the query "INSERT INTO mytable(..., timeOfCreation, ...) VALUES(..., to_timestamp(" + Long.toString(dateTime.getTime()) + "),...)" and then read the saved value ( SELECT timeOfCreation FROM mytable ), they are different ( resultSet.getTimestamp(...).getTime() is not equal to dateTime.getTime() ). How do I need to change the insert statement in order

I am new to PostgreSQL. Suppose I have a table as under colorname Hexa rgb rgbvalue Violet #8B00FF r 139 Violet #8B00FF g 0 Violet #8B00FF b 255 Indigo #4B0082 r 75 Indigo #4B0082 g 0 Indigo #4B0082 b 130 Blue #0000FF r 0 Blue #0000FF g 0 Blue #0000FF b 255 If I do a Pivot in SQL Server as SELECT colorname,hexa,[r], [g], [b] FROM (SELECT colorname,hexa,rgb,rgbvalue FROM tblPivot) AS TableToBePivoted PIVOT ( sum(rgbvalue) FOR rgb IN ([r], [g], [b]) ) AS PivotedTable; I get the output as colorname hexa r g b Blue #0000FF 0 0 255 Indigo #4B0082 75 0 130 Violet #8B00FF 139 0 255 How to do the same

I want to run PostgreSQL 9.1 using Supervisor on Ubuntu 10.04. At the moment, I manually start PostgreSQL using the init script: /etc/init.d/postgresql start According to this post: http://nicksergeant.com/using-postgresql-with-supervisor-on-ubuntu-1010/ , I need to modify the PostgreSQL config to make it run on TCP port instead of Unix socket, in order to make PostgreSQL work with Supervisor. I have two questions regarding this approach: Considering this is more of hack, is there any implication (e.g. security/permissions, performance, etc) of doing this? Why cannot we just run the same init