Method DropFunction

core/functions/collection.go:138–164

DropFunction drops an existing function.

(ctx context.Context, funcIDs ...id.Function)

// DropFunction drops an existing function.
func (pgf *Collection) DropFunction(ctx context.Context, funcIDs ...id.Function) error {
	if len(funcIDs) == 0 {
		return nil
	}
	// Check that each name exists before performing any deletions
	for _, funcID := range funcIDs {
		if _, ok := pgf.accessCache[funcID]; !ok {
			return errors.Errorf(`function %s does not exist`, funcID.FunctionName())
		}
	}

	// Now we'll remove the functions from the map
	mapEditor := pgf.underlyingMap.Editor()
	for _, funcID := range funcIDs {
		err := mapEditor.Delete(ctx, string(funcID))
		if err != nil {
			return err
		}
	}
	newMap, err := mapEditor.Flush(ctx)
	if err != nil {
		return err
	}
	pgf.underlyingMap = newMap
	pgf.mapHash = pgf.underlyingMap.HashOf()
	return pgf.reloadCaches(ctx)
}

// resolveName returns the fully resolved name of the given function. Returns an error if the name is ambiguous.
//