Beispiel #1
0
func (tr *Transaction) Delete(t *table.Table, rowNumber int) int {
	// Execute "before delete" triggers.
	beforeTable, status := tr.DB.Get("~before")
	if status != st.OK {
		return status
	}
	row, status := t.Read(rowNumber)
	if status != st.OK {
		return status
	}
	triggerRA := ra.New()
	_, status = triggerRA.Load(beforeTable)
	if status != st.OK {
		return status
	}
	_, status = triggerRA.Select("TABLE", filter.Eq{}, t.Name)
	if status != st.OK {
		return status
	}
	status = trigger.ExecuteTrigger(tr.DB, t, triggerRA, "DE", row, nil)
	if status != st.OK {
		return status
	}
	// Update the row.
	status = t.Delete(rowNumber)
	if status != st.OK {
		return status
	}
	// Execute "after delete" triggers.
	afterTable, status := tr.DB.Get("~after")
	if status != st.OK {
		return status
	}
	triggerRA = ra.New()
	_, status = triggerRA.Load(afterTable)
	if status != st.OK {
		return status
	}
	_, status = triggerRA.Select("TABLE", filter.Eq{}, t.Name)
	if status != st.OK {
		return status
	}
	status = trigger.ExecuteTrigger(tr.DB, t, triggerRA, "DE", row, nil)
	if status != st.OK {
		return status
	}
	// Log the deleted row.
	tr.Log(&UndoDelete{t, rowNumber})
	return st.OK
}
Beispiel #2
0
func (tr *Transaction) Update(t *table.Table, rowNumber int, row map[string]string) int {
	// Execute "before update" triggers.
	beforeTable, status := tr.DB.Get("~before")
	if status != st.OK {
		return status
	}
	original, status := t.Read(rowNumber)
	if status != st.OK {
		return status
	}
	triggerRA := ra.New()
	_, status = triggerRA.Load(beforeTable)
	if status != st.OK {
		return status
	}
	_, status = triggerRA.Select("TABLE", filter.Eq{}, t.Name)
	if status != st.OK {
		return status
	}
	status = trigger.ExecuteTrigger(tr.DB, t, triggerRA, "UP", row, original)
	if status != st.OK {
		return status
	}
	// Update the row.
	status = t.Update(rowNumber, row)
	if status != st.OK {
		return status
	}
	// Execute "after update" triggers.
	afterTable, status := tr.DB.Get("~after")
	if status != st.OK {
		return status
	}
	triggerRA = ra.New()
	_, status = triggerRA.Load(afterTable)
	if status != st.OK {
		return status
	}
	_, status = triggerRA.Select("TABLE", filter.Eq{}, t.Name)
	if status != st.OK {
		return status
	}
	status = trigger.ExecuteTrigger(tr.DB, t, triggerRA, "UP", row, original)
	if status != st.OK {
		return status
	}
	// Log the updated row.
	tr.Log(&UndoUpdate{t, rowNumber, original})
	return st.OK
}
Beispiel #3
0
func (tr *Transaction) Insert(t *table.Table, row map[string]string) int {
	// Execute "before insert" triggers.
	beforeTable, status := tr.DB.Get("~before")
	if status != st.OK {
		return status
	}
	triggerRA := ra.New()
	_, status = triggerRA.Load(beforeTable)
	if status != st.OK {
		return status
	}
	_, status = triggerRA.Select("TABLE", filter.Eq{}, t.Name)
	if status != st.OK {
		return status
	}
	status = trigger.ExecuteTrigger(tr.DB, t, triggerRA, "IN", row, nil)
	if status != st.OK {
		return status
	}
	// Insert the new row to table.
	numberOfRows, status := t.NumberOfRows()
	if status != st.OK {
		return status
	}
	status = t.Insert(row)
	if status != st.OK {
		return status
	}
	// Execute "after insert" triggers.
	afterTable, status := tr.DB.Get("~after")
	if status != st.OK {
		return status
	}
	triggerRA = ra.New()
	_, status = triggerRA.Load(afterTable)
	if status != st.OK {
		return status
	}
	_, status = triggerRA.Select("TABLE", filter.Eq{}, t.Name)
	if status != st.OK {
		return status
	}
	status = trigger.ExecuteTrigger(tr.DB, t, triggerRA, "IN", row, nil)
	if status != st.OK {
		return status
	}
	// Log the inserted row.
	tr.Log(&UndoInsert{t, numberOfRows})
	return st.OK
}