[fix](inverted index) Fix errors caused by enable_need_read_data_opt (a…

…pache#42064)

## Proposed changes

In the current backend implementation, it is not correctly handle counts
when `is null` predicate exists, so we forbid the storage layer's count
currently.

for example:
```
select count(b) from test where b is null 
```

When apply the is null filter, the result array will fill the default
value of the column type and the count operator can not detect whether
the result is null, so the count operator compute the wrong result.

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/implementation/AggregateStrategies.java

@@ -130,7 +130,8 @@ public List<Rule> buildRules() {
                     Set<Slot> aggSlots = funcs.stream()
                             .flatMap(f -> f.getInputSlots().stream())
                             .collect(Collectors.toSet());
-                    return conjuncts.stream().allMatch(expr -> checkSlotInOrExpression(expr, aggSlots));
+                    return conjuncts.stream().allMatch(expr -> checkSlotInOrExpression(expr, aggSlots)
+                                                                && checkIsNullExpr(expr, aggSlots));
                 })
                 .thenApply(ctx -> {
                     LogicalAggregate<LogicalFilter<LogicalOlapScan>> agg = ctx.root;
@@ -163,7 +164,8 @@ public List<Rule> buildRules() {
                     Set<Slot> aggSlots = funcs.stream()
                             .flatMap(f -> f.getInputSlots().stream())
                             .collect(Collectors.toSet());
-                    return conjuncts.stream().allMatch(expr -> checkSlotInOrExpression(expr, aggSlots));
+                    return conjuncts.stream().allMatch(expr -> checkSlotInOrExpression(expr, aggSlots)
+                                                                && checkIsNullExpr(expr, aggSlots));
                 })
                 .thenApply(ctx -> {
                     LogicalAggregate<LogicalProject<LogicalFilter<LogicalOlapScan>>> agg = ctx.root;
@@ -492,6 +494,22 @@ private boolean checkSlotInOrExpression(Expression expr, Set<Slot> aggSlots) {
         return true;
     }
 
+    private boolean checkIsNullExpr(Expression expr, Set<Slot> aggSlots) {
+        if (expr instanceof IsNull) {
+            Set<Slot> slots = expr.getInputSlots();
+            if (slots.stream().anyMatch(aggSlots::contains)) {
+                return false;
+            }
+        } else {
+            for (Expression child : expr.children()) {
+                if (!checkIsNullExpr(child, aggSlots)) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
     private boolean isDupOrMowKeyTable(LogicalOlapScan logicalScan) {
         if (logicalScan != null) {
             KeysType keysType = logicalScan.getTable().getKeysType();

regression-test/data/inverted_index_p0/test_index_rqg_bug8.out

@@ -0,0 +1,4 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !sql --
+0
+