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Segments: database upgrade/downgrade functionality for version 30; version 29 is still used.

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This will store segment data in TrackPoint.type.
This commit will enable downgrading to previous version.

#316.
This commit is contained in:
Dennis Guse
2021-01-15 07:55:14 +01:00
parent 8a08e7b2b5
commit 50bb0b14b4
2 changed files with 162 additions and 0 deletions
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src/main/java/de/dennisguse/opentracks/content/provider/CustomSQLiteOpenHelper.java
+64
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@@ -79,6 +79,9 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
case 29:
upgradeFrom28to29(db);
break;
case 30:
upgradeFrom29to30(db);
break;
default:
throw new RuntimeException("Not implemented: upgrade to " + toVersion);
@@ -109,6 +112,9 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
case 28:
downgradeFrom29to28(db);
break;
case 29:
downgradeFrom30to29(db);
break;
default:
throw new RuntimeException("Not implemented: downgrade to " + toVersion);
@@ -330,4 +336,62 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
db.setTransactionSuccessful();
db.endTransaction();
}
/**
* Move TrackPoint type (segment start vs. segment end) into separate column.
*/
private void upgradeFrom29to30(SQLiteDatabase db) {
db.beginTransaction();
// TrackPoints
db.execSQL("ALTER TABLE trackpoints ADD COLUMN type TEXT CHECK(type IN (-2, -1, 0, 1))");
db.execSQL("UPDATE trackpoints SET type = -2, latitude = NULL, longitude = NULL WHERE latitude = 200 * 1E6");
db.execSQL("UPDATE trackpoints SET type = 1, latitude = NULL, longitude = NULL WHERE latitude = 100 * 1E6");
db.execSQL("UPDATE trackpoints SET type = 0 WHERE type IS NULL");
// PAUSE markers without RESUME were inserted automatically as segment markers if the distance between subsequent trackpoints was too great.
// Only stored data is time (local device time); not meaningful as trackpoints were stored with GPS time.
// 1. Mark there successors as SEGMENT_START_AUTOMATIC
db.execSQL(
"UPDATE trackpoints " +
"SET type = -1 " +
"WHERE type = 0 AND 1 = " +
"(SELECT type FROM trackpoints AS T1 " +
"WHERE trackpoints._id > t1._id " +
"AND trackpoints.trackid = t1.trackid " +
"ORDER BY t1._id DESC " +
"LIMIT 1)");
// 2. Delete old PAUSE trackpoint
db.execSQL(
"DELETE FROM trackpoints" +
" WHERE type = 1 AND -1 = " +
"(SELECT type FROM trackpoints AS T1 " +
"WHERE trackpoints._id < t1._id " +
"AND trackpoints.trackid = t1.trackid " +
"ORDER BY t1._id ASC " +
"LIMIT 1)");
db.setTransactionSuccessful();
db.endTransaction();
}
private void downgradeFrom30to29(SQLiteDatabase db) {
db.beginTransaction();
// TrackPoints
//TODO That does not restore deleted trackpoints
db.execSQL("UPDATE trackpoints SET latitude = 200 * 1E6, longitude = NULL WHERE type = -2");
db.execSQL("UPDATE trackpoints SET latitude = 100 * 1E6, longitude = NULL WHERE type = 1");
// TrackPoints; identical to upgradeFrom27to28()
db.execSQL("ALTER TABLE trackpoints RENAME TO trackpoints_old");
db.execSQL("CREATE TABLE trackpoints (_id INTEGER PRIMARY KEY AUTOINCREMENT, trackid INTEGER NOT NULL, longitude INTEGER, latitude INTEGER, time INTEGER, elevation FLOAT, accuracy FLOAT, speed FLOAT, bearing FLOAT, sensor_heartrate FLOAT, sensor_cadence FLOAT, sensor_power FLOAT, elevation_gain FLOAT, FOREIGN KEY (trackid) REFERENCES tracks(_id) ON UPDATE CASCADE ON DELETE CASCADE)");
db.execSQL("INSERT INTO trackpoints SELECT _id, trackid, longitude, latitude, time, elevation, accuracy, speed, bearing, sensor_heartrate, sensor_cadence, sensor_power, elevation_gain FROM trackpoints_old");
db.execSQL("DROP TABLE trackpoints_old");
db.execSQL("CREATE INDEX trackpoints_trackid_index ON trackpoints(trackid)");
db.setTransactionSuccessful();
db.endTransaction();
}
}