Database Technologies

In series of writing further on upcoming features in 9.3, I thought about including new improvements coming in data types in PostgreSQL. 1. Increase the maximum length of large objects from 2GB to 4TB PostgreSQL has support of Large Objects from starting. However the limit of large objects in PostgreSQL was limited to 2GB. From 9.3 onwards, PostgreSQL can store large objects up to 4TB. Thats happened due to lifting the limitation of API for large object. APIs like lo_seek(),lo_tell cannot return over 2GB offset and main reason was offset parameters defined for these function is of 4 bytes and results length provided by these functions is 4 bytes. If user do the calculation, he can see 2^31-1=2GB, it resulted in 2GB. To overcome from this limitation, PostgreSQL is coming with new APIs: lo_seek64 and lo_tell64 functions. Libpq interface will check if those lo_tell64/seek64 exits then use it or use the 32 bit of lo_seek/lo_tell functions, this way compatibility has been maintain...

In the series of blogging about new features in 9.3, today, I thought about blogging new functions and improvements coming in PostgreSQL. Lets look whats new in 9.3, in terms of in build functions: 1. New in one array functions for one dimensional array PostgreSQL 9.3, is coming with new functions which can help users to manipulate one dimensional arrays by calling simple functions at the place of crafting their own functions and following some methods to do the modification in it. i. array_remove function This is a new function added in 9.3, which provides ability for removing the elements from array. Function takes two arguments :   a. One dimensional array from which user wants to remove elements   b. element value which user wants to remove . Syntax of this function is given below: ARRAY_REMOVE( , element) Example of array_remove is given below: postgres=# select array_remove(ARRAY['First','Second','Delete','Four'],'D...