Changeset: e6f2c940bd99 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/e6f2c940bd99
Modified Files:
sql/backends/monet5/rel_pphash.c
Branch: pp_hashjoin
Log Message:
reduce the projection columns of a cross product if it has rel->exps
TODO: put the projection columns in sub->op1, once we have a proper way to
identify a 'sub' as an oahash-table
diffs (22 lines):
diff --git a/sql/backends/monet5/rel_pphash.c b/sql/backends/monet5/rel_pphash.c
--- a/sql/backends/monet5/rel_pphash.c
+++ b/sql/backends/monet5/rel_pphash.c
@@ -281,6 +281,18 @@ rel2bin_oahash_build(backend *be, sql_re
stmt *sub = rel2bin_materialize(be, l, refs, false);
if (sub->cand)
sub = subrel_project(be, sub, refs, rel);
+ if (exps_prj_hsh) {
+ /* reduce the resulting columns accordingly. just find the
projection columns from sub and add them as stmts_hp */
+ // FIXME: add the (references to the) projection columns to
sub->op1, but it now causes problem with pp_dynamic_slices. See the FIXME note
there
+ list *ll = sa_list(be->mvc->sa);
+ for (node *n = exps_prj_hsh->h; n; n = n->next) {
+ sql_exp *e = n->data;
+ stmt *payload = exp_bin(be, e, sub,
NULL, NULL, NULL, NULL, NULL, 0, 0, 0);
+ assert(payload); /* must find */
+ append(ll, payload);
+ }
+ sub = stmt_list(be, ll);
+ }
return sub;
}
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