9b27eab71c
substituting a child rel's output expressions into the appendrel's restriction clauses yields a pseudoconstant restriction. We might be able to skip scanning that child rel entirely (if we get constant FALSE), or generate a one-time filter. 8.3 more or less accidentally generated plans that weren't completely stupid in these cases, but that was only because an extra recursive level of subquery_planner() always occurred and allowed const-simplification to happen. 8.4's ability to pull up appendrel members with non-Var outputs exposes the fact that we need to work harder here. Per gripe from Sergey Burladyan. |
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| .. | ||
| Makefile | ||
| allpaths.c | ||
| clausesel.c | ||
| costsize.c | ||
| equivclass.c | ||
| indxpath.c | ||
| joinpath.c | ||
| joinrels.c | ||
| orindxpath.c | ||
| pathkeys.c | ||
| tidpath.c | ||