267 lines
10 KiB
C
267 lines
10 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 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 (" EXCLUDED_VISIT_TYPES ")), "\
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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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)
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#define CREATE_HISTORYVISITS_AFTERDELETE_TRIGGER 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 (" EXCLUDED_VISIT_TYPES ")), "\
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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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)
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/**
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* A predicate matching pages on rev_host, based on a given host value.
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* 'host' may be either the moz_hosts.host column or an alias representing an
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* equivalent value.
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*/
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#define HOST_TO_REVHOST_PREDICATE \
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"rev_host = get_unreversed_host(host || '.') || '.' " \
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"OR rev_host = get_unreversed_host(host || '.') || '.www.'"
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/**
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* Select the best prefix for a host, based on existing pages registered for it.
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* Prefixes have a priority, from the top to the bottom, so that secure pages
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* have higher priority, and more generically "www." prefixed hosts come before
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* unprefixed ones.
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* Given a host, examine associated pages and:
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* - if all of the typed pages start with https://www. return https://www.
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* - if all of the typed pages start with https:// return https://
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* - if all of the typed pages start with ftp: return ftp://
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* - if all of the typed pages start with www. return www.
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* - otherwise don't use any prefix
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*/
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#define HOSTS_PREFIX_PRIORITY_FRAGMENT \
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"SELECT CASE " \
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"WHEN 1 = ( " \
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"SELECT min(substr(url,1,12) = 'https://www.') FROM moz_places h " \
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"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
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") THEN 'https://www.' " \
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"WHEN 1 = ( " \
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"SELECT min(substr(url,1,8) = 'https://') FROM moz_places h " \
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"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
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") THEN 'https://' " \
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"WHEN 1 = ( " \
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"SELECT min(substr(url,1,4) = 'ftp:') FROM moz_places h " \
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"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
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") THEN 'ftp://' " \
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"WHEN 1 = ( " \
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"SELECT min(substr(url,1,11) = 'http://www.') FROM moz_places h " \
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"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
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") THEN 'www.' " \
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"END "
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/**
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* These triggers update the hostnames table whenever moz_places changes.
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*/
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#define CREATE_PLACES_AFTERINSERT_TRIGGER 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 REPLACE INTO moz_hosts (id, host, frecency, typed, prefix) " \
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"SELECT " \
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"(SELECT id FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), " \
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"fixup_url(get_unreversed_host(NEW.rev_host)), " \
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"MAX(IFNULL((SELECT frecency FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), -1), NEW.frecency), " \
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"MAX(IFNULL((SELECT typed FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), 0), NEW.typed), " \
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"(" HOSTS_PREFIX_PRIORITY_FRAGMENT \
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"FROM ( " \
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"SELECT fixup_url(get_unreversed_host(NEW.rev_host)) AS host " \
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") AS match " \
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") " \
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" WHERE LENGTH(NEW.rev_host) > 1; " \
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"END" \
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)
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// This is a hack to workaround the lack of FOR EACH STATEMENT in Sqlite, until
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// bug 871908 can be fixed properly.
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// We store the modified hosts in a temp table, and after every DELETE FROM
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// moz_places, we issue a DELETE FROM moz_updatehosts_temp. The AFTER DELETE
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// trigger will then take care of updating the moz_hosts table.
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// Note this way we lose atomicity, crashing between the 2 queries may break the
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// hosts table coherency. So it's better to run those DELETE queries in a single
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// transaction.
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// Regardless, this is still better than hanging the browser for several minutes
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// on a fast machine.
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#define CREATE_PLACES_AFTERDELETE_TRIGGER 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 OR IGNORE INTO moz_updatehosts_temp (host)" \
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"VALUES (fixup_url(get_unreversed_host(OLD.rev_host)));" \
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"END" \
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)
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#define CREATE_UPDATEHOSTS_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_updatehosts_afterdelete_trigger " \
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"AFTER DELETE ON moz_updatehosts_temp FOR EACH ROW " \
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"BEGIN " \
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"DELETE FROM moz_hosts " \
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"WHERE host = OLD.host " \
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"AND NOT EXISTS(" \
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"SELECT 1 FROM moz_places " \
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"WHERE rev_host = get_unreversed_host(host || '.') || '.' " \
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"OR rev_host = get_unreversed_host(host || '.') || '.www.' " \
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"); " \
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"UPDATE moz_hosts " \
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"SET prefix = (" HOSTS_PREFIX_PRIORITY_FRAGMENT ") " \
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"WHERE host = OLD.host; " \
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"END" \
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)
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// For performance reasons the host frecency is updated only when the page
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// frecency changes by a meaningful percentage. This is because the frecency
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// decay algorithm requires to update all the frecencies at once, causing a
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// too high overhead, while leaving the ordering unchanged.
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#define CREATE_PLACES_AFTERUPDATE_FRECENCY_TRIGGER 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 NEW.frecency >= 0 " \
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"AND ABS(" \
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"IFNULL((NEW.frecency - OLD.frecency) / CAST(NEW.frecency AS REAL), " \
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"(NEW.frecency - OLD.frecency))" \
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") > .05 " \
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"BEGIN " \
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"UPDATE moz_hosts " \
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"SET frecency = (SELECT MAX(frecency) FROM moz_places " \
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"WHERE rev_host = get_unreversed_host(host || '.') || '.' " \
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"OR rev_host = get_unreversed_host(host || '.') || '.www.') " \
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"WHERE host = fixup_url(get_unreversed_host(NEW.rev_host)); " \
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"END" \
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)
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#define CREATE_PLACES_AFTERUPDATE_TYPED_TRIGGER NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_places_afterupdate_typed_trigger " \
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"AFTER UPDATE OF typed ON moz_places FOR EACH ROW " \
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"WHEN NEW.typed = 1 " \
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"BEGIN " \
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"UPDATE moz_hosts " \
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"SET typed = 1 " \
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"WHERE host = fixup_url(get_unreversed_host(NEW.rev_host)); " \
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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 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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"END" \
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)
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#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERDELETE_TRIGGER 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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)
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#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERINSERT_TRIGGER 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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"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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)
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#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERUPDATE_TRIGGER NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterupdate_trigger " \
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"AFTER UPDATE OF fk 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 = NEW.fk;" \
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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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)
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#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERDELETE_TRIGGER 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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)
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#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
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"CREATE TEMP TRIGGER moz_keyords_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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)
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#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERUPDATE_TRIGGER 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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)
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#endif // __nsPlacesTriggers_h__
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