Summary: Methods | Inherited Methods

Update

The android.arch Architecture Components packages are no longer maintained. They have been superseded by the corresponding androidx.* packages. See androidx.room.Update instead.

public abstract @interface Update
implements Annotation

android.arch.persistence.room.Update

---

Marks a method in a Dao annotated class as an update method.

The implementation of the method will update its parameters in the database if they already exists (checked by primary keys). If they don't already exists, this option will not change the database.

All of the parameters of the Update method must either be classes annotated with Entity or collections/array of it.

See also:

• Insert
• Delete

Summary

Public methods
int	onConflict() What to do if a conflict happens.

Inherited methods
From interface java.lang.annotation.Annotation abstract Class<? extends Annotation> annotationType() abstract boolean equals(Object arg0) abstract int hashCode() abstract String toString()

Public methods

onConflict

int onConflict ()

What to do if a conflict happens.

Returns
int	How to handle conflicts. Defaults to ABORT.

See also:

• SQLite conflict documentation

• Annotations

  • ColumnInfo
  • ColumnInfo.Collate
  • ColumnInfo.SQLiteTypeAffinity
  • Dao
  • Database
  • Delete
  • Embedded
  • Entity
  • ForeignKey
  • ForeignKey.Action
  • Ignore
  • Index
  • Insert
  • OnConflictStrategy
  • PrimaryKey
  • Query
  • RawQuery
  • Relation
  • SkipQueryVerification
  • Transaction
  • TypeConverter
  • TypeConverters
  • Update

• Classes

  • DatabaseConfiguration
  • InvalidationTracker
  • InvalidationTracker.Observer
  • Room
  • RoomDatabase
  • RoomDatabase.Builder
  • RoomDatabase.Callback
  • RoomDatabase.MigrationContainer
  • RoomWarnings
  • RxRoom

• Enums

  • RoomDatabase.JournalMode

• Exceptions

  • EmptyResultSetException