Израиль начал наземную операцию на юге Ливана14:50
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Полковник высказался о новом уровне конфликта Ирана с США и Израилем14:52，更多细节参见新收录的资料
Now Postgres faces a dilemma. It can use the B-tree index on timestamp to get rows in the right timestamp order, but it has no way to skip directly to “US” rows. It must walk the index one entry at a time, checking the country for each row and discarding most of them. In the worst case, this means walking the entire index. Or it can scan rows that match severity