Just like this example, I cannot even tell the join ordering from it. And what does "ALL" and "ref" in the table mean? Is there any manual about the visual explain?
When I run the EXPLAIN ANALYZE command on a given query, I'm having a difficult time interpreting the outputted time value. For example (actual time=8163.890..8163.893). Do the internal decimals ...
I have the following EXPLAIN PLAN results from a query on my DB2 database. 0 SELECT STATEMENT ( Estimated Costs = 5.928E+02 [timerons] ) 1 RETURN 2 HSJOIN 3 [O] ...