Trigger

A class that implements this interface can be used as a trigger.

Methods
void fire(Connection conn, Object[] oldRow, Object[] newRow)
This method is called for each triggered action.
void init(Connection conn, String schemaName, String triggerName, String tableName, boolean before, int type)
This method is called by the database engine once when initializing the trigger.

Fields
static int DELETE = 4
static int INSERT = 1
static int UPDATE = 2

void fire(Connection conn, Object[] oldRow, Object[] newRow) throws SQLException

This method is called for each triggered action.

Parameters:
conn - a connection to the database
oldRow - the old row, or null if no old row is available (for INSERT)
newRow - the new row, or null if no new row is available (for DELETE)
Throws:
SQLException - if the operation must be undone

void init(Connection conn, String schemaName, String triggerName, String tableName, boolean before, int type) throws SQLException

This method is called by the database engine once when initializing the trigger.

Parameters:
conn - a connection to the database
schemaName - the name of the schema
triggerName - the name of the trigger used in the CREATE TRIGGER statement
tableName - the name of the table
before - whether the fire method is called before or after the operation is performed
type - the operation type: INSERT, UPDATE, or DELETE

INSERT = 1

The trigger is called for INSERT statements.

UPDATE = 2

The trigger is called for UPDATE statements.

DELETE = 4

The trigger is called for DELETE statements.