Esempio n. 1
0
        public void Execute(ICollection <DatabaseFunction> baseFunctions, ICollection <DatabaseFunction> compareFunctions)
        {
            bool first = false;

            //find new functions (in compare, but not in base)
            foreach (var function in compareFunctions)
            {
                var name   = function.Name;
                var schema = function.SchemaOwner;
                var match  = baseFunctions.FirstOrDefault(t => t.Name == name && t.SchemaOwner == schema);
                if (match != null)
                {
                    continue;
                }
                var script = string.Empty;
                if (!first)
                {
                    first = true;
                    //CREATE FUNCTION cannot be combined with other statements in a batch,
                    //so be preceeded by and terminate with a "GO" (sqlServer) or "/" (Oracle)
                    if (_results.Count > 0)
                    {
                        script += _writer.RunStatements() + Environment.NewLine;
                    }
                }
                script += "-- NEW FUNCTION " + function.Name + Environment.NewLine +
                          _writer.AddFunction(function);
                CreateResult(ResultType.Add, function, script);
            }

            //find dropped and existing functions
            foreach (var function in baseFunctions)
            {
                var name   = function.Name;
                var schema = function.SchemaOwner;
                var match  = compareFunctions.FirstOrDefault(t => t.Name == name && t.SchemaOwner == schema);
                if (match == null)
                {
                    CreateResult(ResultType.Delete, function, "-- DROP FUNCTION " + function.Name + Environment.NewLine +
                                 _writer.DropFunction(function));
                    continue;
                }
                //functions may or may not have been changed

                if (function.Sql == match.Sql)
                {
                    continue;                            //the same
                }
                //a sanitized comparison
                if (_writer.CompareProcedure(function.Sql, match.Sql))
                {
                    continue;
                }

                //in Oracle could be a CREATE OR REPLACE
                CreateResult(ResultType.Change, function, "-- ALTER FUNCTION " + function.Name + Environment.NewLine +
                             _writer.DropFunction(function) + Environment.NewLine +
                             _writer.AddFunction(match));
            }
        }