md5 function available since ...?

Yannick Warnier wrote:

Hi there,

I'd like to know since what version the md5() function is available in
postgresql. I didn't find the function in the doc (I tried looking at
some of the different function types in the user doc).

Release notes show it being added in 7.4.

Also, how may I find it by myself? Is there a complete list of function
names and description somewhere?

Using psql, try \df.

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