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  /frameworks/support/room/runtime/src/main/java/androidx/room/migration/
Migration.java 17 package androidx.room.migration;
23 * Base class for a database migration.
25 * Each migration can move between 2 versions that are defined by {@link #startVersion} and
28 * A migration can handle more than 1 version (e.g. if you have a faster path to choose when
30 * 3 and latest version is >= 5, Room will use the migration object that can migrate from
35 * versions, you should still provide a Migration object to the builder.
37 public abstract class Migration {
42 * Creates a new migration between {@code startVersion} and {@code endVersion}.
45 * @param endVersion The end version of the database after this migration is applied.
47 public Migration(int startVersion, int endVersion)
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  /external/autotest/database/
migrate.py 20 class Migration(object):
21 """Represents a database migration."""
35 """Instantiates a Migration from a file.
37 @param filename: Name of a migration file.
39 @return An instantiated Migration object.
67 """Performs an up migration (to a newer version).
76 """Performs a down migration (to an older version).
93 # A boolean, this will only be set to True if this migration should be
145 """Checks whether the migration table exists."""
156 """Creates the migration table.""
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