Recover the distinct constraint in WCTSelect

Author: Qiuwen-chen

objc/WCDB/interface/chaincall/WCTSelect.mm

@@ -58,7 +58,7 @@ - (instancetype)initWithCore:(const std::shared_ptr<WCDB::CoreBase> &)core andRe
             return self;
         }
         _resultList.insert(_resultList.begin(), resultList.begin(), resultList.end());
-        _statement.select(_resultList, _resultList.isDistinct()).from(tableName.UTF8String);
+        _statement.select(_resultList, resultList.isDistinct()).from(tableName.UTF8String);
         _cls = nil;
         for (const WCTResult &result : _resultList) {
             Class cls = result.getBindingClass();

objc/sample/statistics/sample_statistics_main.mm

@@ -65,9 +65,10 @@ void sample_statistics_main(NSString *baseDirectory)
     //trace for transaction
     {
         NSMutableArray *objects = [[NSMutableArray alloc] init];
-        for (int i = 0; i < 10; ++i) {
+        for (int i = 1; i < 10; ++i) {
             WCTSampleStatistics *object = [[WCTSampleStatistics alloc] init];
             object.intValue = i;
+            [objects addObject:object];
         }
         [database insertObjects:objects into:tableName];