Indeed, MAL is not the level you should program at all. In recent release the rendering is aimed at debugging and it it is not directly useful for modification. regards, Martin On 22/07/15 13:57, Martin Schwitalla wrote:
Hello,
to improve execution time I wanted to work with MAL-statements, so that I could directly control the query plan. But it seems that the generated MAL-Plans don`t „just work“ when I type them.
I tried to get used to MAL with the simple query „select * from table;“. This got me the following plan:
function user.s1_1{autoCommit=true}():void; barrier X_59 := language.dataflow(); X_2 := sql.mvc(); X_3:bat[:oid,:oid] := sql.tid(X_2,"sys","diseases"); X_6:bat[:oid,:int] := sql.bind(X_2,"sys","diseases","id",0); (X_9,r1_9) := sql.bind(X_2,"sys","diseases","id",2); X_12:bat[:oid,:int] := sql.bind(X_2,"sys","diseases","id",1); X_14 := sql.delta(X_6,X_9,r1_9,X_12); X_15 := algebra.leftfetchjoin(X_3,X_14); X_23:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","name",0); (X_25,r1_25) := sql.bind(X_2,"sys","diseases","name",2); X_27:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","name",1); X_28 := sql.delta(X_23,X_25,r1_25,X_27); X_29 := algebra.leftfetchjoin(X_3,X_28); X_16:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","short_name",0); (X_18,r1_18) := sql.bind(X_2,"sys","diseases","short_name",2); X_20:bat[:oid,:str] := sql.bind(X_2,"sys","diseases","short_name",1); X_21 := sql.delta(X_16,X_18,r1_18,X_20); X_22 := algebra.leftfetchjoin(X_3,X_21); language.pass(X_3); exit X_59; X_30 := sql.resultSet(3,1,X_15); sql.rsColumn(X_30,"sys.diseases","id","int",32,0,X_15); sql.rsColumn(X_30,"sys.diseases","short_name","varchar",255,0,X_22); sql.rsColumn(X_30,"sys.diseases","name","varchar",255,0,X_29); X_40 := io.stdout(); sql.exportResult(X_40,X_30); end s1_1;
But when I try to run this statements I get the following error:
MAPI = (monetdb) /tmp/.s.monetdb.5250 QUERY = end s1_1; ERROR = !TypeException:user.s1_1[7]:'sql.delta' undefined in: X_14:any := sql.delta(X_6:bat[:oid,:int], X_9:bat[:oid,:oid], r1_9:bat[:oid,:any], X_12:bat[:oid,:int]) !ERROR: MSresetVariablescould not allocate space for
What am I`m missing that it doesn`t work?
Kind regards, Martin
users-list mailing list users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list