Implement NOT logical operator

query_executors/memory_executor/memory_executor.go

@@ -192,6 +192,10 @@ func (r rowContext) applyFilters(filters interface{}) bool {
 	case parsers.SelectItem:
 		resolvedValue := r.resolveSelectItem(typedFilters)
 		if value, ok := resolvedValue.(bool); ok {
+			if typedFilters.Invert {
+				return !value
+			}
+
 			return value
 		}
 	}

query_executors/memory_executor/were_test.go

@@ -136,4 +136,22 @@ func Test_Execute_Where(t *testing.T) {
 			},
 		)
 	})
+
+	t.Run("Should execute parse NOT conditions", func(t *testing.T) {
+		testQueryExecute(
+			t,
+			parsers.SelectStmt{
+				SelectItems: []parsers.SelectItem{{Path: []string{"c", "id"}, Alias: ""}},
+				Table:       parsers.Table{SelectItem: testutils.SelectItem_Path("c")},
+				Filters: parsers.SelectItem{
+					Path:   []string{"c", "isCool"},
+					Invert: true,
+				},
+			},
+			mockData,
+			[]memoryexecutor.RowType{
+				map[string]interface{}{"id": "12345"},
+			},
+		)
+	})
 }