Fear No SQL
Wrapping up my series on the, xoshiro/xoroshiro algorithms, in this article I present a package to return 32-bit values using the following variants. The numbers in the names refer to the size of the state array that each method operates on. The 64s operate on two 32-bit values, while the 128s operate on four 32-bit…
Continuing in the path of previous two posts, the package below supports all of the xoshiro/xoroshiro algorithms returning 64-bit values. The numbers in the names refer to the size of the state array that each method operates on. Using each of them follows the same pattern: For example… SQL> BEGIN 2 xoshiro.set_mode(‘xoroshiro128++’); 3 xoshiro.set_state(xoshiro.seed_tab(12345, 67890));…
A long time ago I ported the Mersenne Twister pseudo-random number generator to pl/sql. That algorithm, and my port, are showing their age so I started looking at other generators. A newer approach is found in the xoshiro/xoroshiro family by David Blackman and Sebastiano Vigna found here. I’ve chosen xoshiro256** as one of their “all-purpose,…