A lot of generic SQL stuff in there for sure. But, last I worked with MySQL (it has admittedly been a few years) the indexing options were severely limited whe

A lot of generic SQL stuff in there for sure. But, last I worked with MySQL (it has admittedly been a few years) the indexing options were severely limited when compared with PostgreSQL. Last I used it you could not index an expression or qualify an index with a where clause for example. Also at that time MySQL could only make use of one index per query. All of those deficiencies may have since been eliminated.