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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsPlacesTables.h"
#ifndef __nsPlacesTriggers_h__
#define __nsPlacesTriggers_h__
/**
* Exclude these visit types:
* 0 - invalid
* 4 - EMBED
* 7 - DOWNLOAD
* 8 - FRAMED_LINK
* 9 - RELOAD
**/
#define EXCLUDED_VISIT_TYPES "0, 4, 7, 8, 9"
/**
* This triggers update visit_count and last_visit_date based on historyvisits
* table changes.
*/
#define CREATE_HISTORYVISITS_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_historyvisits_afterinsert_v2_trigger " \
"AFTER INSERT ON moz_historyvisits FOR EACH ROW " \
"BEGIN " \
"SELECT store_last_inserted_id('moz_historyvisits', NEW.id); " \
"UPDATE moz_places SET " \
"visit_count = visit_count + (SELECT NEW.visit_type NOT IN (" EXCLUDED_VISIT_TYPES ")), "\
"last_visit_date = MAX(IFNULL(last_visit_date, 0), NEW.visit_date) " \
"WHERE id = NEW.place_id;" \
"END" \
)
#define CREATE_HISTORYVISITS_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_historyvisits_afterdelete_v2_trigger " \
"AFTER DELETE ON moz_historyvisits FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places SET " \
"visit_count = visit_count - (SELECT OLD.visit_type NOT IN (" EXCLUDED_VISIT_TYPES ")), "\
"last_visit_date = (SELECT visit_date FROM moz_historyvisits " \
"WHERE place_id = OLD.place_id " \
"ORDER BY visit_date DESC LIMIT 1) " \
"WHERE id = OLD.place_id;" \
"END" \
)
/**
* A predicate matching pages on rev_host, based on a given host value.
* 'host' may be either the moz_hosts.host column or an alias representing an
* equivalent value.
*/
#define HOST_TO_REVHOST_PREDICATE \
"rev_host = get_unreversed_host(host || '.') || '.' " \
"OR rev_host = get_unreversed_host(host || '.') || '.www.'"
/**
* Select the best prefix for a host, based on existing pages registered for it.
* Prefixes have a priority, from the top to the bottom, so that secure pages
* have higher priority, and more generically "www." prefixed hosts come before
* unprefixed ones.
* Given a host, examine associated pages and:
* - if all of the typed pages start with https://www. return https://www.
* - if all of the typed pages start with https:// return https://
* - if all of the typed pages start with ftp: return ftp://
* - if all of the typed pages start with www. return www.
* - otherwise don't use any prefix
*/
#define HOSTS_PREFIX_PRIORITY_FRAGMENT \
"SELECT CASE " \
"WHEN 1 = ( " \
"SELECT min(substr(url,1,12) = 'https://www.') FROM moz_places h " \
"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
") THEN 'https://www.' " \
"WHEN 1 = ( " \
"SELECT min(substr(url,1,8) = 'https://') FROM moz_places h " \
"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
") THEN 'https://' " \
"WHEN 1 = ( " \
"SELECT min(substr(url,1,4) = 'ftp:') FROM moz_places h " \
"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
") THEN 'ftp://' " \
"WHEN 1 = ( " \
"SELECT min(substr(url,1,11) = 'http://www.') FROM moz_places h " \
"WHERE (" HOST_TO_REVHOST_PREDICATE ") AND +h.typed = 1 " \
") THEN 'www.' " \
"END "
/**
* These triggers update the hostnames table whenever moz_places changes.
*/
#define CREATE_PLACES_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterinsert_trigger " \
"AFTER INSERT ON moz_places FOR EACH ROW " \
"BEGIN " \
"SELECT store_last_inserted_id('moz_places', NEW.id); " \
"INSERT OR REPLACE INTO moz_hosts (id, host, frecency, typed, prefix) " \
"SELECT " \
"(SELECT id FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), " \
"fixup_url(get_unreversed_host(NEW.rev_host)), " \
"MAX(IFNULL((SELECT frecency FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), -1), NEW.frecency), " \
"MAX(IFNULL((SELECT typed FROM moz_hosts WHERE host = fixup_url(get_unreversed_host(NEW.rev_host))), 0), NEW.typed), " \
"(" HOSTS_PREFIX_PRIORITY_FRAGMENT \
"FROM ( " \
"SELECT fixup_url(get_unreversed_host(NEW.rev_host)) AS host " \
") AS match " \
") " \
" WHERE LENGTH(NEW.rev_host) > 1; " \
"END" \
)
// This is a hack to workaround the lack of FOR EACH STATEMENT in Sqlite, until
// bug 871908 can be fixed properly.
// We store the modified hosts in a temp table, and after every DELETE FROM
// moz_places, we issue a DELETE FROM moz_updatehosts_temp. The AFTER DELETE
// trigger will then take care of updating the moz_hosts table.
// Note this way we lose atomicity, crashing between the 2 queries may break the
// hosts table coherency. So it's better to run those DELETE queries in a single
// transaction.
// Regardless, this is still better than hanging the browser for several minutes
// on a fast machine.
#define CREATE_PLACES_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterdelete_trigger " \
"AFTER DELETE ON moz_places FOR EACH ROW " \
"BEGIN " \
"INSERT OR IGNORE INTO moz_updatehosts_temp (host)" \
"VALUES (fixup_url(get_unreversed_host(OLD.rev_host)));" \
"END" \
)
#define CREATE_UPDATEHOSTS_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_updatehosts_afterdelete_trigger " \
"AFTER DELETE ON moz_updatehosts_temp FOR EACH ROW " \
"BEGIN " \
"DELETE FROM moz_hosts " \
"WHERE host = OLD.host " \
"AND NOT EXISTS(" \
"SELECT 1 FROM moz_places " \
"WHERE rev_host = get_unreversed_host(host || '.') || '.' " \
"OR rev_host = get_unreversed_host(host || '.') || '.www.' " \
"); " \
"UPDATE moz_hosts " \
"SET prefix = (" HOSTS_PREFIX_PRIORITY_FRAGMENT ") " \
"WHERE host = OLD.host; " \
"END" \
)
// For performance reasons the host frecency is updated only when the page
// frecency changes by a meaningful percentage. This is because the frecency
// decay algorithm requires to update all the frecencies at once, causing a
// too high overhead, while leaving the ordering unchanged.
#define CREATE_PLACES_AFTERUPDATE_FRECENCY_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterupdate_frecency_trigger " \
"AFTER UPDATE OF frecency ON moz_places FOR EACH ROW " \
"WHEN NEW.frecency >= 0 " \
"AND ABS(" \
"IFNULL((NEW.frecency - OLD.frecency) / CAST(NEW.frecency AS REAL), " \
"(NEW.frecency - OLD.frecency))" \
") > .05 " \
"BEGIN " \
"UPDATE moz_hosts " \
"SET frecency = (SELECT MAX(frecency) FROM moz_places " \
"WHERE rev_host = get_unreversed_host(host || '.') || '.' " \
"OR rev_host = get_unreversed_host(host || '.') || '.www.') " \
"WHERE host = fixup_url(get_unreversed_host(NEW.rev_host)); " \
"END" \
)
#define CREATE_PLACES_AFTERUPDATE_TYPED_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_places_afterupdate_typed_trigger " \
"AFTER UPDATE OF typed ON moz_places FOR EACH ROW " \
"WHEN NEW.typed = 1 " \
"BEGIN " \
"UPDATE moz_hosts " \
"SET typed = 1 " \
"WHERE host = fixup_url(get_unreversed_host(NEW.rev_host)); " \
"END" \
)
/**
* This trigger removes a row from moz_openpages_temp when open_count reaches 0.
*
* @note this should be kept up-to-date with the definition in
* nsPlacesAutoComplete.js
*/
#define CREATE_REMOVEOPENPAGE_CLEANUP_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMPORARY TRIGGER moz_openpages_temp_afterupdate_trigger " \
"AFTER UPDATE OF open_count ON moz_openpages_temp FOR EACH ROW " \
"WHEN NEW.open_count = 0 " \
"BEGIN " \
"DELETE FROM moz_openpages_temp " \
"WHERE url = NEW.url;" \
"END" \
)
#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterdelete_trigger " \
"AFTER DELETE ON moz_bookmarks FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count - 1 " \
"WHERE id = OLD.fk;" \
"END" \
)
#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterinsert_trigger " \
"AFTER INSERT ON moz_bookmarks FOR EACH ROW " \
"BEGIN " \
"SELECT store_last_inserted_id('moz_bookmarks', NEW.id); " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count + 1 " \
"WHERE id = NEW.fk;" \
"END" \
)
#define CREATE_BOOKMARKS_FOREIGNCOUNT_AFTERUPDATE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_bookmarks_foreign_count_afterupdate_trigger " \
"AFTER UPDATE OF fk ON moz_bookmarks FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count + 1 " \
"WHERE id = NEW.fk;" \
"UPDATE moz_places " \
"SET foreign_count = foreign_count - 1 " \
"WHERE id = OLD.fk;" \
"END" \
)
#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_keywords_foreign_count_afterdelete_trigger " \
"AFTER DELETE ON moz_keywords FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count - 1 " \
"WHERE id = OLD.place_id;" \
"END" \
)
#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_keyords_foreign_count_afterinsert_trigger " \
"AFTER INSERT ON moz_keywords FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count + 1 " \
"WHERE id = NEW.place_id;" \
"END" \
)
#define CREATE_KEYWORDS_FOREIGNCOUNT_AFTERUPDATE_TRIGGER NS_LITERAL_CSTRING( \
"CREATE TEMP TRIGGER moz_keywords_foreign_count_afterupdate_trigger " \
"AFTER UPDATE OF place_id ON moz_keywords FOR EACH ROW " \
"BEGIN " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count + 1 " \
"WHERE id = NEW.place_id; " \
"UPDATE moz_places " \
"SET foreign_count = foreign_count - 1 " \
"WHERE id = OLD.place_id; " \
"END" \
)
#endif // __nsPlacesTriggers_h__
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