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