зеркало из https://github.com/mozilla/gecko-dev.git
327 строки
18 KiB
C
327 строки
18 KiB
C
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsPlacesTables.h"
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#ifndef __nsPlacesTriggers_h__
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#define __nsPlacesTriggers_h__
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/**
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* Exclude these visit types:
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* 0 - invalid
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* 4 - EMBED
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* 7 - DOWNLOAD
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* 8 - FRAMED_LINK
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* 9 - RELOAD
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**/
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#define EXCLUDED_VISIT_TYPES "0, 4, 7, 8, 9"
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/**
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* This triggers update visit_count and last_visit_date based on historyvisits
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* table changes.
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*/
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#define CREATE_HISTORYVISITS_AFTERINSERT_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_historyvisits_afterinsert_v2_trigger " \
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"AFTER INSERT ON moz_historyvisits FOR EACH ROW " \
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"BEGIN " \
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"SELECT store_last_inserted_id('moz_historyvisits', NEW.id); " \
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"UPDATE moz_places SET " \
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"visit_count = visit_count + (SELECT NEW.visit_type NOT IN " \
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"(" EXCLUDED_VISIT_TYPES \
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")), " \
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"last_visit_date = MAX(IFNULL(last_visit_date, 0), NEW.visit_date) " \
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"WHERE id = NEW.place_id;" \
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"END")
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#define CREATE_HISTORYVISITS_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_historyvisits_afterdelete_v2_trigger " \
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"AFTER DELETE ON moz_historyvisits FOR EACH ROW " \
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"BEGIN " \
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"UPDATE moz_places SET " \
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"visit_count = visit_count - (SELECT OLD.visit_type NOT IN " \
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"(" EXCLUDED_VISIT_TYPES \
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")), " \
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"last_visit_date = (SELECT visit_date FROM moz_historyvisits " \
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"WHERE place_id = OLD.place_id " \
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"ORDER BY visit_date DESC LIMIT 1) " \
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"WHERE id = OLD.place_id;" \
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"END")
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// This macro is a helper for the next several triggers. It updates the origin
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// frecency stats. Use it as follows. Before changing an origin's frecency,
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// call the macro and pass "-" (subtraction) as the argument. That will update
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// the stats by deducting the origin's current contribution to them. And then
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// after you change the origin's frecency, call the macro again, this time
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// passing "+" (addition) as the argument. That will update the stats by adding
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// the origin's new contribution to them.
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#define UPDATE_ORIGIN_FRECENCY_STATS(op) \
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"INSERT OR REPLACE INTO moz_meta(key, value) " \
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"SELECT '" MOZ_META_KEY_ORIGIN_FRECENCY_COUNT \
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"', " \
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"IFNULL((SELECT value FROM moz_meta WHERE key = " \
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"'" MOZ_META_KEY_ORIGIN_FRECENCY_COUNT "'), 0) " op \
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" CAST(frecency > 0 AS INT) " \
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"FROM moz_origins WHERE prefix = OLD.prefix AND host = OLD.host " \
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"UNION " \
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"SELECT '" MOZ_META_KEY_ORIGIN_FRECENCY_SUM \
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"', " \
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"IFNULL((SELECT value FROM moz_meta WHERE key = " \
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"'" MOZ_META_KEY_ORIGIN_FRECENCY_SUM "'), 0) " op \
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" MAX(frecency, 0) " \
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"FROM moz_origins WHERE prefix = OLD.prefix AND host = OLD.host " \
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"UNION " \
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"SELECT '" MOZ_META_KEY_ORIGIN_FRECENCY_SUM_OF_SQUARES \
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"', " \
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"IFNULL((SELECT value FROM moz_meta WHERE key = " \
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"'" MOZ_META_KEY_ORIGIN_FRECENCY_SUM_OF_SQUARES "'), 0) " op \
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" (MAX(frecency, 0) * MAX(frecency, 0)) " \
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"FROM moz_origins WHERE prefix = OLD.prefix AND host = OLD.host "
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// The next several triggers are a workaround for the lack of FOR EACH STATEMENT
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// in Sqlite, until bug 871908 can be fixed properly.
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//
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// While doing inserts or deletes into moz_places, we accumulate the affected
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// origins into a temp table. Afterwards, we delete everything from the temp
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// table, causing the AFTER DELETE trigger to fire for it, which will then
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// update moz_origins and the origin frecency stats. As a consequence, we also
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// do this for updates to moz_places.frecency in order to make sure that changes
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// to origins are serialized.
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//
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// Note this way we lose atomicity, crashing between the 2 queries may break the
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// tables' coherency. So it's better to run those DELETE queries in a single
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// transaction. Regardless, this is still better than hanging the browser for
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// several minutes on a fast machine.
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// This trigger runs on inserts into moz_places.
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#define CREATE_PLACES_AFTERINSERT_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_places_afterinsert_trigger " \
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"AFTER INSERT ON moz_places FOR EACH ROW " \
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"BEGIN " \
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"SELECT store_last_inserted_id('moz_places', NEW.id); " \
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"INSERT OR IGNORE INTO moz_updateoriginsinsert_temp (place_id, prefix, " \
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"host, frecency) " \
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"VALUES (NEW.id, get_prefix(NEW.url), get_host_and_port(NEW.url), " \
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"NEW.frecency); " \
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"END")
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// This trigger corresponds to the previous trigger. It runs on deletes on
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// moz_updateoriginsinsert_temp -- logically, after inserts on moz_places.
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#define CREATE_UPDATEORIGINSINSERT_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_updateoriginsinsert_afterdelete_trigger " \
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"AFTER DELETE ON moz_updateoriginsinsert_temp FOR EACH ROW " \
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"BEGIN " \
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/* Deduct the origin's current contribution to frecency stats */ \
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UPDATE_ORIGIN_FRECENCY_STATS("-") "; " \
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"INSERT INTO moz_origins (prefix, host, frecency) " \
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"VALUES (OLD.prefix, OLD.host, MAX(OLD.frecency, 0)) " \
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"ON CONFLICT(prefix, host) DO UPDATE " \
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"SET frecency = frecency + OLD.frecency " \
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"WHERE OLD.frecency > 0; " \
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/* Add the origin's new contribution to frecency stats */ \
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UPDATE_ORIGIN_FRECENCY_STATS("+") "; " \
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"UPDATE moz_places SET origin_id = ( " \
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"SELECT id " \
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"FROM moz_origins " \
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"WHERE prefix = OLD.prefix AND host = OLD.host " \
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") " \
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"WHERE id = OLD.place_id; " \
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"END" \
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)
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// This trigger runs on deletes on moz_places.
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#define CREATE_PLACES_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_places_afterdelete_trigger " \
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"AFTER DELETE ON moz_places FOR EACH ROW " \
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"BEGIN " \
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"INSERT INTO moz_updateoriginsdelete_temp (prefix, host, " \
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"frecency_delta) " \
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"VALUES (get_prefix(OLD.url), get_host_and_port(OLD.url), " \
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"-MAX(OLD.frecency, 0)) " \
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"ON CONFLICT(prefix, host) DO UPDATE " \
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"SET frecency_delta = frecency_delta - OLD.frecency " \
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"WHERE OLD.frecency > 0; " \
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"END ")
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// This trigger corresponds to the previous trigger. It runs on deletes on
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// moz_updateoriginsdelete_temp -- logically, after deletes on moz_places.
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#define CREATE_UPDATEORIGINSDELETE_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_updateoriginsdelete_afterdelete_trigger " \
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"AFTER DELETE ON moz_updateoriginsdelete_temp FOR EACH ROW " \
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"BEGIN " \
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/* Deduct the origin's current contribution to frecency stats */ \
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UPDATE_ORIGIN_FRECENCY_STATS("-") "; " \
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"UPDATE moz_origins SET frecency = frecency + OLD.frecency_delta " \
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"WHERE prefix = OLD.prefix AND host = OLD.host; " \
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"DELETE FROM moz_origins " \
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"WHERE prefix = OLD.prefix AND host = OLD.host AND NOT EXISTS ( " \
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"SELECT id FROM moz_places " \
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"WHERE origin_id = moz_origins.id " \
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"LIMIT 1 " \
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"); " \
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/* Add the origin's new contribution to frecency stats */ \
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UPDATE_ORIGIN_FRECENCY_STATS("+") "; " \
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"DELETE FROM moz_icons " \
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"WHERE fixed_icon_url_hash = hash(fixup_url(OLD.host || '/favicon.ico')) " \
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"AND fixup_url(icon_url) = fixup_url(OLD.host || '/favicon.ico') " \
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"AND NOT EXISTS (SELECT 1 FROM moz_origins WHERE host = OLD.host " \
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"OR host = fixup_url(OLD.host)); " \
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"END" \
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)
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// This trigger runs on updates to moz_places.frecency.
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//
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// However, we skip this when frecency changes are due to frecency decay since
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// (1) decay updates all frecencies at once, so this trigger would run for each
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// moz_place, which would be expensive; and (2) decay does not change the
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// ordering of frecencies since all frecencies decay by the same percentage.
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#define CREATE_PLACES_AFTERUPDATE_FRECENCY_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_places_afterupdate_frecency_trigger " \
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"AFTER UPDATE OF frecency ON moz_places FOR EACH ROW " \
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"WHEN NOT is_frecency_decaying() " \
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"BEGIN " \
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"INSERT INTO moz_updateoriginsupdate_temp (prefix, host, " \
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"frecency_delta) " \
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"VALUES (get_prefix(NEW.url), get_host_and_port(NEW.url), " \
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"MAX(NEW.frecency, 0) - MAX(OLD.frecency, 0)) " \
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"ON CONFLICT(prefix, host) DO UPDATE " \
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"SET frecency_delta = frecency_delta + EXCLUDED.frecency_delta; " \
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"END ")
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// This trigger corresponds to the previous trigger. It runs on deletes on
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// moz_updateoriginsupdate_temp -- logically, after updates to
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// moz_places.frecency.
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#define CREATE_UPDATEORIGINSUPDATE_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_updateoriginsupdate_afterdelete_trigger " \
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"AFTER DELETE ON moz_updateoriginsupdate_temp FOR EACH ROW " \
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"BEGIN " \
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/* Deduct the origin's current contribution to frecency stats */ \
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UPDATE_ORIGIN_FRECENCY_STATS("-") "; " \
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"UPDATE moz_origins " \
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"SET frecency = frecency + OLD.frecency_delta " \
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"WHERE prefix = OLD.prefix AND host = OLD.host; " \
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/* Add the origin's new contribution to frecency stats */ \
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UPDATE_ORIGIN_FRECENCY_STATS("+") "; " \
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"END" \
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)
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/**
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* This trigger removes a row from moz_openpages_temp when open_count reaches 0.
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*
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* @note this should be kept up-to-date with the definition in
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* nsPlacesAutoComplete.js
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*/
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#define CREATE_REMOVEOPENPAGE_CLEANUP_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMPORARY TRIGGER moz_openpages_temp_afterupdate_trigger " \
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"AFTER UPDATE OF open_count ON moz_openpages_temp FOR EACH ROW " \
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"WHEN NEW.open_count = 0 " \
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"BEGIN " \
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"DELETE FROM moz_openpages_temp " \
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"WHERE url = NEW.url " \
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"AND userContextId = NEW.userContextId;" \
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"END")
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#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterdelete_trigger " \
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"AFTER DELETE ON moz_bookmarks FOR EACH ROW " \
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"BEGIN " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count - 1 " \
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"WHERE id = OLD.fk;" \
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"END")
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#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERINSERT_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterinsert_trigger " \
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"AFTER INSERT ON moz_bookmarks FOR EACH ROW " \
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"BEGIN " \
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"SELECT store_last_inserted_id('moz_bookmarks', NEW.id); " \
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"SELECT note_sync_change() WHERE NEW.syncChangeCounter > 0; " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count + 1 " \
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"WHERE id = NEW.fk;" \
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"END")
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#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERUPDATE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterupdate_trigger " \
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"AFTER UPDATE OF fk, syncChangeCounter ON moz_bookmarks FOR EACH ROW " \
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"BEGIN " \
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"SELECT note_sync_change() " \
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"WHERE NEW.syncChangeCounter <> OLD.syncChangeCounter; " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count + 1 " \
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"WHERE OLD.fk <> NEW.fk AND id = NEW.fk;" \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count - 1 " \
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"WHERE OLD.fk <> NEW.fk AND id = OLD.fk;" \
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"END")
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#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_keywords_foreign_count_afterdelete_trigger " \
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"AFTER DELETE ON moz_keywords FOR EACH ROW " \
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"BEGIN " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count - 1 " \
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"WHERE id = OLD.place_id;" \
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"END")
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#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERINSERT_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_keywords_foreign_count_afterinsert_trigger " \
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"AFTER INSERT ON moz_keywords FOR EACH ROW " \
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"BEGIN " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count + 1 " \
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"WHERE id = NEW.place_id;" \
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"END")
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#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERUPDATE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_keywords_foreign_count_afterupdate_trigger " \
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"AFTER UPDATE OF place_id ON moz_keywords FOR EACH ROW " \
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"BEGIN " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count + 1 " \
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"WHERE id = NEW.place_id; " \
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"UPDATE moz_places " \
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"SET foreign_count = foreign_count - 1 " \
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"WHERE id = OLD.place_id; " \
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"END")
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#define CREATE_ICONS_AFTERINSERT_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_icons_afterinsert_v1_trigger " \
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"AFTER INSERT ON moz_icons FOR EACH ROW " \
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"BEGIN " \
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"SELECT store_last_inserted_id('moz_icons', NEW.id); " \
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"END")
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#define CREATE_BOOKMARKS_DELETED_AFTERINSERT_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_bookmarks_deleted_afterinsert_v1_trigger " \
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"AFTER INSERT ON moz_bookmarks_deleted FOR EACH ROW " \
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"BEGIN " \
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"SELECT note_sync_change(); " \
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"END")
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#define CREATE_BOOKMARKS_DELETED_AFTERDELETE_TRIGGER \
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NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_bookmarks_deleted_afterdelete_v1_trigger " \
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"AFTER DELETE ON moz_bookmarks_deleted FOR EACH ROW " \
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"BEGIN " \
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"SELECT note_sync_change(); " \
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"END")
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#endif // __nsPlacesTriggers_h__
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