w3resource
MySQL Tutorial

PostgreSQL LPAD() function

LPAD() function

The PostgreSQL lpad() function is used to fill up a string of specific length by a substring. If the length of the substring is equal to the remaining length of main string it will fill up properly, if less than the remaining length, the substring will repeat until it is not filling up, if longer than the remaining length or specified length it will be truncated on the right.

Syntax:

lpad(string,length[,fill_text])

Parameters:

Name Description Return Type
string A string, which will be filled up by another string. text
length The length of the string, which will be after filled up by substring.. integer
fill_text The substring which will be fill up the sting to length. text

PostgreSQL Version: 9.3

Pictorial Presentation of PostgreSQL LPAD() function

Pictorial presentation of PostgreSQL LPAD() function

Example: PostgreSQL lpad() function:

In the example below, the main string is 'esource' and its length is 7, the substring is 'w3r' of length 3 and the string have to be a length of 10. So, remaining length is 3, and the substring 'w3r' will fill up properly and the result is 'w3resource'.

Code:


SELECT lpad('esource', 10, 'w3r');

Sample Output:

    lpad
------------
 w3resource
(1 row)

Example 2:

In the example below, the main string is 'esource' and its length is 7, the substring is 'w3r' of length 3 and the string have to be a length of 13. So, remaining length is 6, and the substring 'w3r' will repeat two times to fill it up, thus the result is 'w3rw3resource'.

Code:

SELECT lpad('esource', 13, 'w3r');

Sample Output:

    lpad
---------------
 w3rw3resource
(1 row)

Example 3:

In the example below, the main string is 'w3resource' and its length is 10, the substring is 'lpad' of length 4 and the string have to be a length of 8. Here, the specified length is smaller than the string, so, instead of lpadding the string will be truncated by two characters from the right side of the string, thus the result is 'w3resour'.

Code:

SELECT lpad('w3resource', 8, 'lpad');

Sample Output:

  lpad
----------
 w3resour
(1 row)

Many of our valued users post comments along with piece of code. Disqus may, false positively, consider those piece of code as Bad or Starnge syntax and send those comments to spam automatically. Even if that happens, we will make sure those useful comments are taken out of spam and approved. It may take a couple of days for that though, but any useful comment will be brought to public view for sure. We regret if that happend to any user. You may write us directly regarding this to - w3resource[at]yahoo[dot]com.