diff options
Diffstat (limited to 'src/backend/nodes/copyfuncs.c')
| -rw-r--r-- | src/backend/nodes/copyfuncs.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c index f864af5d667..c94799b15c7 100644 --- a/src/backend/nodes/copyfuncs.c +++ b/src/backend/nodes/copyfuncs.c @@ -672,10 +672,13 @@ _copyMergeJoin(const MergeJoin *from) */ COPY_NODE_FIELD(mergeclauses); numCols = list_length(from->mergeclauses); - COPY_POINTER_FIELD(mergeFamilies, numCols * sizeof(Oid)); - COPY_POINTER_FIELD(mergeCollations, numCols * sizeof(Oid)); - COPY_POINTER_FIELD(mergeStrategies, numCols * sizeof(int)); - COPY_POINTER_FIELD(mergeNullsFirst, numCols * sizeof(bool)); + if (numCols > 0) + { + COPY_POINTER_FIELD(mergeFamilies, numCols * sizeof(Oid)); + COPY_POINTER_FIELD(mergeCollations, numCols * sizeof(Oid)); + COPY_POINTER_FIELD(mergeStrategies, numCols * sizeof(int)); + COPY_POINTER_FIELD(mergeNullsFirst, numCols * sizeof(bool)); + } return newnode; } |