- Android sqlite insert if not exists else update update#
- Android sqlite insert if not exists else update full#
If an INSTEAD OF INSERT trigger exists on a view, then it is
Android sqlite insert if not exists else update update#
Statements, not UPDATE and DELETE statements within triggers.Ĭommon table expression are not supported forīEFORE and AFTER triggers work only on ordinary tables. That compile-time option only applies to top-level UPDATE and DELETE Using the SQLITE_ENABLE_UPDATE_DELETE_LIMIT compile-time option. ORDER BY and LIMIT are not normally supported for UPDATE orĭELETE in any context but can be enabled for top-level statements The ORDER BY and LIMIT clauses on UPDATE and DELETE statements are not The INDEXED BY and NOT INDEXED clauses are not supported for UPDATE and The "INSERT INTO table DEFAULT VALUES" form of the INSERT statement
Trigger is allowed to query or modify any table in any ATTACH-ed database. TEMP triggers are not subject to the same-database rule. Same database as the table or view to which the trigger is attached. The table to be modified or queried must exist in the Statement must be an unqualified table name. The name of the table to be modified in an UPDATE, DELETE, or INSERT
Android sqlite insert if not exists else update full#
The full syntax for UPDATE, DELETE, and INSERT statements. Statements within triggers do not support Syntax Restrictions On UPDATE, DELETE, and INSERT Statements Within Triggers are removed using the DROP TRIGGER statement. Other tables, the trigger is not dropped or modified if those other Policy of the outer statement is used instead.Īssociated with (the table-name table) isĭropped. The statement causing the trigger to fire, then conflict handling However if an ON CONFLICT clause is specified as part of BEFORE is the default when neither keyword is present.Īn ON CONFLICT clause may be specified as part of an UPDATE or INSERT Will be executed relative to the insertion, modification or removal of theĪssociated row. The BEFORE or AFTER keyword determines when the trigger actions If no WHEN clause is supplied, the SQL statementsĪre executed every time the trigger fires. If a WHEN clause is supplied, the SQL statements specifiedĪre only executed if the WHEN clause is true. OLD and NEW references may only be used in triggers onĮvents for which they are relevant, as follows: INSERT column-name", whereĬolumn-name is the name of a column from the table that the trigger The row being inserted, deleted or updated using references of the form Inserted, updated or deleted by the statement causing the trigger to fire.īoth the WHEN clause and the trigger actions may access elements of May be executed (depending on the WHEN clause) for each database row being Hence explicitly specifying FOR EACH ROW is optional.įOR EACH ROW implies that the SQL statements specified in the trigger Many years after SQLite was widely deployed, we have resistedįixing the problem for fear of breaking legacy applications.Īt this time SQLite supports only FOR EACH ROW triggers, not FOR EACH Statement if any of the names in the "UPDATE OF" clause are notĬolumns in the table. It would be more helpful if SQLite would fail the CREATE TRIGGER Unrecognized column names are silently ignored.
One of the terms in the SET clause of the UPDATE statement.ĭue to an historical oversight, columns named in the "UPDATE OF"Ĭlause do not actually have to exist in the table being updated. Syntax is used, then the trigger will only fire ifĬolumn-name appears on the left-hand side of
The trigger fires once for each row that is deleted, inserted, The following operations: DELETE, INSERT, UPDATE. That are automatically performed when a specified database eventĮach trigger must specify that it will fire for one of The CREATE TRIGGER statement is used to add triggers to theĭatabase schema. table-name AS table-alias INDEXED BY index-name NOT INDEXED table-function-name ( expr ), AS table-alias ( select-stmt ) ( table-or-subquery ), join-clause 2.
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