fix Where bug from recent changes

Author: apmckinlay

dbms/query/where.go

@@ -662,6 +662,7 @@ func (w *Where) setApproach(index []string, frac float64, app any, tran QueryTra
 	}
 	if app == nil { // filter
 		w.source = SetApproach(w.source, index, frac, tran)
+		w.tbl, _ = w.source.(*Table) // SetApproach may insert TempIndex
 	} else {
 		app := app.(*whereApproach)
 		idx := app.index
@@ -810,7 +811,7 @@ func (w *Where) Rewind() {
 }
 
 func (w *Where) Select(cols, vals []string) {
-	// fmt.Println("Where", w.tbl.name, "Select", cols, unpack(vals))
+	// fmt.Println("Where Select", cols, unpack(vals))
 	w.nsels++
 	w.Rewind()
 	w.selOrg, w.selEnd = "", ""

full_test.go

@@ -1,3 +1,4 @@
+// Copyright Suneido Software Corp. All rights reserved.
 // Governed by the MIT license found in the LICENSE file.
 
 package main
@@ -14,6 +15,28 @@ import (
 	. "github.com/apmckinlay/gsuneido/core"
 )
 
+func TestFuzzBug(t *testing.T) {
+	if testing.Short() {
+		t.SkipNow()
+	}
+	Libload = libload // dependency injection
+	mainThread.Name = "main"
+	mainThread.SetSviews(&sviews)
+	MainThread = &mainThread
+	openDbms()
+	defer db.CloseKeepMapped()
+
+	result := compile.EvalString(MainThread, `
+		QueryFuzz.MakeTables(7616220806)
+		QueryHash("
+			bln
+		leftjoin /*MANY TO MANY*/ by(ik)
+				((ivc where ck isnt '3')
+			union /*NOT DISJOINT*/
+				ivc)", details:)`)
+	fmt.Println(result)
+}
+
 func TestFastGet(t *testing.T) {
 	if testing.Short() {
 		t.SkipNow()