fix nil pointer

angelamayxie · angelamayxie · commit 95289f1fd44e · 2025-11-06T14:50:04.000-08:00
diff --git a/sql/memo/rel_props.go b/sql/memo/rel_props.go
@@ -360,7 +360,7 @@ func (m *Memo) statsForRel(ctx *sql.Context, rel RelExpr) sql.Statistic {
 				leftRows := n.Left.RelProps.GetStats().RowCount()
 				if n.Injective && leftRows < card {
 					injective = true
-					if leftRows < smallestLeft.RowCount() {
+					if smallestLeft == nil || leftRows < smallestLeft.RowCount() {
 						smallestLeft = n.Left.RelProps.GetStats()
 					}
 				}

Original file line number	Diff line number	Diff line change
`@@ -360,7 +360,7 @@ func (m Memo) statsForRel(ctx sql.Context, rel RelExpr) sql.Statistic {`
`360`	`360`	`leftRows := n.Left.RelProps.GetStats().RowCount()`
`361`	`361`	`if n.Injective && leftRows < card {`
`362`	`362`	`injective = true`
`363`		`- if leftRows < smallestLeft.RowCount() {`
	`363`	`+ if smallestLeft == nil \|\| leftRows < smallestLeft.RowCount() {`
`364`	`364`	`smallestLeft = n.Left.RelProps.GetStats()`
`365`	`365`	`}`
`366`	`366`	`}`