>> Is it known who "invented" materialized path approach in modeling
hierarchical data with SQL? <<
I have no idea, but we had used linked list structure for decades in
procedural languages and concatenation codes in Cobol just as long.
Path enumeration was probably obvious and has a lot of inventors.
Ben Gan and Moreau made it popular in their book. I made the nested
sets model popular in my books. Dr. Codd has the first adjacency list
model in one of his early papers that I know of.
Received on Thu Sep 30 2004 - 18:53:42 CDT
