postgres

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History

Tom Lane 69cc60dcfd Guard against input_rows == 0 in estimate_num_groups().

This case doesn't normally happen, because the planner usually clamps
all row estimates to at least one row; but I found that it can arise
when dealing with relations excluded by constraints.  Without a defense,
estimate_num_groups() can return zero, which leads to divisions by zero
inside the planner as well as assertion failures in the executor.

An alternative fix would be to change set_dummy_rel_pathlist() to make
the size estimate for a dummy relation 1 row instead of 0, but that seemed
pretty ugly; and probably someday we'll want to drop the convention that
the minimum rowcount estimate is 1 row.

Back-patch to 8.4, as the problem can be demonstrated that far back.

2013-05-10 17:15:30 -04:00

backend

Guard against input_rows == 0 in estimate_num_groups().

2013-05-10 17:15:30 -04:00

bin

Fix walsender failure at promotion.

2013-05-08 20:30:17 +03:00

common

Move relpath() to libpgcommon

2013-02-21 22:46:17 -03:00

include

Use the term "radix tree" instead of "suffix tree" for SP-GiST text opclass.