migration_sqlite3.anubis
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/*
* Created by PyramIDE.
* User: David René
* Date: 31/08/2011
* Time: 2:09
*
*/
read tools/basis.anubis
read system/files.anubis
read system/logger.anubis
read system/string.anubis
read data_base/sqlite.anubis
read calexium_lib/database/alter_table.anubis
read calexium_lib/database/db_utils.anubis
read calexium_lib/net_services_protocols/logger_service.anubis
read calexium_lib/types/version.anubis
read migration_common_sqlite3.anubis
public type Migration:
migration(DB_Version version,
(SQLite3DataBase, Logger) -> Maybe(One) migrate_to,
(SQLite3DataBase, Logger) -> Maybe(One) create_tables,
(SQLite3DataBase, Logger) -> Maybe(One) create_indexes,
).
define String dir_save_database = "db_backup/".
public define Bool
migration_less
(
Migration a,
Migration b
)=
db_version_less(a.version, b.version)
.
public define Maybe(One)
backup_database
(
Logger logger,
// String current_version,
String db_path,
String main_db_name,
List(String) other_db_names,
)
=
// with should_copy = if file_exists(db_path + main_db_name) then
// if sqlite3_open(db_path + main_db_name) is
// {
// error(sql_error) then false, // maybe not created yet
// ok(Database db) then
// with ver = get_version_settings(db),
// ver != current_version
// }
// else false,
//if should_copy then
with dir_save = db_path + dir_save_database,
if (Maybe(String))make_directory(dir_save) is
{
failure then logError(logger, "Can't create directory '"+db_path + dir_save_database+"'"); failure,
success(_) then
with copy_with_log = (String src, String dst) |->
if file_exists(src) then
if copy_file(src, dst) is
{
cant_read_file then logError(logger, "Can't read source file '" + src + "'."); failure,
cant_create_file then logError(logger, "Can't create destination file '" + dst + "'."); failure,
copy_error then logError(logger, "Can't copy file '" + src + "' to file '" + dst + "'."); failure,
copy_file_mode_error then logError(logger, "Can't get file mode for source file '" + src + "'."); failure,
copy_file_times_error then logError(logger, "Can't set file times into file '" + dst + "'."); failure,
copy_ok(_) then logInfo(logger, "File '" + dst + "' saved"); success(unique)
}
else success(unique),
with copy_db = (List(String) names) |-copy_db->
if names is
{
[] then success(unique),
[h . t] then
if copy_with_log(db_path + h, dir_save + h) is
{
failure then failure,
success(_) then copy_db(t)
}
},
copy_db([main_db_name . other_db_names])
}
//else success(unique)
.
public define Maybe(One)
backup_database
(
Logger logger,
SQLite3DataBase db,
String db_path,
String main_db_name
)=
//we use SQLite 3.27.0 feature to backup the database. So we check the running SQLite engine version before
//to proceed
with v3_27 = version(3,27,0,0),
with sqlite_version = if sql_query_timeout(db, "SELECT sqlite_version();", "backup_database get version") is
{
error(_) then logError(logger, "Can't get sqlite version for backup");failure,
ok(_, cursor, _) then
with sqlite_version_str = db_get_String(cursor),
to_Version(sqlite_version_str)
},
if sqlite_version is
{
failure then logError(logger, "Can't get sqlite version for backup ");failure,
success(sqlite_v) then
//if the SQLite engine version is < 3.27 we use old method for backup
if sqlite_v.numeric +< v3_27.numeric then
logWarning(logger, "The current SQLite engine v"+sqlite_v+" doesn't support vaccum into. Fallback to previous method");
backup_database(logger, db_path, main_db_name, [])
else
//construct the target folder for backup
with dir_save = db_path + dir_save_database,
if (Maybe(String))make_directory(dir_save) is
{
failure then logError(logger, "Can't create directory '"+db_path + dir_save_database+"'"); failure,
success(_) then
with filename = db_path + dir_save_database+get_current_datetime_condensed+"-"+main_db_name,
if sql_query(db, "VACUUM INTO '"+filename+"';") is
{
error(err) then logError(logger,db_error(err, "Can't backup database into "+filename));failure,
ok(_,) then logInfo(logger, "database backuped into "+filename);success(unique)
}
}
}
.
//
//define Maybe(One)
// do_migration_loop
// (
// SQLite3DataBase db,
// Logger logger,
// String current_version, //current version of app
// String db_ver, //version found in db settings
// List(Migration) migrations,
// Maybe(Migration) need_to_create_table, // success in case of new DB or when no migration have been done
// (SQLite3DataBase, String) -> One update_db_version,
// ) =
// if migrations is
// {
// [] then
// if need_to_create_table is
// {
// failure then
// update_db_version(db, current_version);
// success(unique),
// success(last) then
// if last is migration(_, _, create_tables, create_indexes) then
// if create_tables(db, logger) is success(_) then
// if create_indexes(db, logger) is success(_) then
// update_db_version(db, current_version);
// success(unique)
// else
// failure
// else
// failure
// },
// [h . t] then
// since h is migration(version, migrate_to, _, _),
// if compare_db_version(db_ver, version) < 0 then
// logInfo(logger, "Migrating Database from version " + db_ver + " to version " + version);
// if migrate_to(db, logger) is failure then
// failure
// else
// do_migration_loop(db, logger, current_version, version, t, failure, update_db_version)
// else
// do_migration_loop(db, logger, current_version, db_ver, t, success(h), update_db_version),
// }.
//
///* SQLite 3 version */
//public define Maybe(One)
// do_migration
// (
// SQLite3DataBase db,
// Logger logger,
// String current_version,
// (SQLite3DataBase) -> String get_db_version,
// (SQLite3DataBase, String) -> One update_db_version,
// List(Migration) all_migrations,
// )=
// if is_empty_database(db) then // new empty database
// logInfo(logger, "No database found. Creating a new one...");
// do_migration_loop(db, logger, current_version, "", [], last(all_migrations), update_db_version)
// else
// (
// with db_version = get_db_version(db),
// //if app required db version is same as db_version, there is nothing to migrate
// if compare_db_version(db_version, current_version) = 0 then
// logInfo(logger, "Database version "+db_version+". No database migration found.");
// success(unique)
// else
// do_migration_loop(db, logger, current_version, db_version, all_migrations, failure, update_db_version)
// ).
/* SQLite 3 version hk_settings with DB_Version*/
define Maybe(One)
do_table_indexes
(
SQLite3DataBase db,
Logger logger,
Migration _migration,
(DB_Version) -> One update_db_version
)=
since _migration is migration(mig_version, _, create_tables, create_indexes),
if create_tables(db, logger) is success(_) then
if create_indexes(db, logger) is success(_) then
update_db_version(mig_version);
success(unique)
else
failure
else
failure
.
define Maybe(One)
do_migration_loop
(
SQLite3DataBase db,
Logger logger,
// String current_version, //current version of app
DB_Version db_ver, //version found in db settings
List(Migration) migrations,
(DB_Version) -> One update_db_version,
) =
if migrations is
{
[] then success(unique),
[h . t] then
since h is migration(migration_version, migrate_to, create_tables, create_indexes),
if compare_db_version(db_ver, migration_version) is
{
less then
logInfo(logger, "[less] Migrating Database from version " + db_ver + " to version " + migration_version);
if migrate_to(db, logger) is failure then
failure
else
update_db_version(migration_version);
do_migration_loop(db, logger, migration_version, t, update_db_version)
more then
logInfo(logger, "[more] No Database migration found from version " + db_ver + " to version " + migration_version);
do_migration_loop(db, logger, db_ver, t, update_db_version)
equal then
logInfo(logger, "[equal] No Database migration found from version " + db_ver + " to version " + migration_version);
do_migration_loop(db, logger, db_ver, t, update_db_version)
equal_but_sign then
logInfo(logger, "Database migration found from version " + db_ver + " to version " + migration_version+ " by hash difference ");
if migrate_to(db, logger) is failure then
failure
else
update_db_version(migration_version);
do_migration_loop(db, logger, migration_version, t, update_db_version)
}
}.
public define Maybe(One)
do_migration
(
SQLite3DataBase db,
Logger logger,
DB_Version current_db_version,
(DB_Version) -> One update_db_version,
List(Migration) all_migrations,
)=
if is_empty_database(db) then // new empty database
logInfo(logger, "No database found. Creating a new one...");
if last(all_migrations) is success(migration) then
do_table_indexes(db, logger, migration, update_db_version)
else
logError(logger, "No database migration found. Can't create Database");
failure
else
(
// with db_version = get_db_version,
// //if app version is same as db_version, there is nothing to migrate
// if compare_db_version(db_version, current_version) = 0 then
// logInfo(logger, "Database version "+db_version+". No database migration found.");
// success(unique)
// else
do_migration_loop(db, logger, current_db_version, all_migrations, update_db_version)
).
public define Maybe(One)
do_create_indexes
(
SQLite3DataBase db,
Logger logger,
List(Migration) all_migrations,
)=
if last(all_migrations) is
{
failure then logCriticalError(logger, "Index creation: migration list is empty!"); failure,
success(last_migration) then
if last_migration is migration(_, _, _, create_indexes) then
if create_indexes(db, logger) is success(_) then
success(unique)
else
failure
}.