Avoid showing an error when query has not @kind metadata (#801)

Fixes #800

extensions/ql-vscode/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [UNRELEASED]
 
+- Avoid showing an error popup when user runs a query without `@kind` metadata. [#801](https://github.com/github/vscode-codeql/pull/801)
+
 ## 1.4.4 - 19 March 2021
 
 - Introduce evaluator options for saving intermediate results to the disk cache (`codeQL.runningQueries.saveCache`) and for limiting the size of this cache (`codeQL.runningQueries.cacheSize`). [#778](https://github.com/github/vscode-codeql/pull/778)

extensions/ql-vscode/src/run-queries.ts

@@ -169,7 +169,12 @@ export class QueryInfo {
     if (!hasMetadataFile) {
       logger.log('Cannot produce interpreted results since the database does not have a .dbinfo or codeql-database.yml file.');
     }
-    return hasMetadataFile;
+
+    const hasKind = !!this.metadata?.kind;
+    if (!hasKind) {
+      logger.log('Cannot produce interpreted results since the query does not have @kind metadata.');
+    }
+    return hasMetadataFile && hasKind;
   }
 
   /**