MonetDB: Oct2020 - Check for candidate list only if subrel_bin c...

[Pedro Ferreira]

Changeset: 27280c62d39c for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/27280c62d39c
Modified Files:
        sql/backends/monet5/rel_bin.c
Branch: Oct2020
Log Message:

Check for candidate list only if subrel_bin call succeeded. This fixes bug #7087


diffs (14 lines):

diff --git a/sql/backends/monet5/rel_bin.c b/sql/backends/monet5/rel_bin.c
--- a/sql/backends/monet5/rel_bin.c
+++ b/sql/backends/monet5/rel_bin.c
@@ -3296,9 +3296,9 @@ rel2bin_select(backend *be, sql_rel *rel
 
        if (rel->l) { /* first construct the sub relation */
                sub = subrel_bin(be, rel->l, refs);
-               sel = sub->cand;
                if (!sub)
                        return NULL;
+               sel = sub->cand;
                sub = row2cols(be, sub);
        }
        if (!sub && !predicate)
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