Add option to silence query plan debug output for individual queries

Summary:
Sometimes you have to perform a query that needs to do a table scan. For those
times you don't want to silence entire classes of queries (e.g. by table name),
you can now silence individual queries.

Test Plan: Run locally, verify that noisy stuff disappears from logs

Reviewers: evan, juan

Reviewed By: juan

Differential Revision: https://phab.nylas.com/D3763

internal_packages/search-index/lib/search-indexer.es6

@@ -29,6 +29,7 @@ export default class SearchIndexer {
       .order(modelClass.naturalSortOrder())
       .offset(indexSize)
       .limit(1)
+      .silenceQueryPlanDebugOutput()
     // console.info('SearchIndexer: _getIndexCutoff query', query.sql());
     const models = await query;
     return models[0];

src/flux/models/query.es6

@@ -56,6 +56,7 @@ export default class ModelQuery {
     this._returnIds = false;
     this._includeJoinedData = [];
     this._count = false;
+    this._logQueryPlanDebugOutput = true;
   }
 
   clone() {
@@ -90,6 +91,11 @@ export default class ModelQuery {
     return this;
   }
 
+  silenceQueryPlanDebugOutput() {
+    this._logQueryPlanDebugOutput = false;
+    return this;
+  }
+
   // Public: Add one or more where clauses to the query
   //
   // - `matchers` An {Array} of {Matcher} objects that add where clauses to the underlying query.

src/flux/stores/database-store.es6

@@ -296,7 +296,7 @@ class DatabaseStore extends NylasStore {
   //
   // If a query is made before the database has been opened, the query will be
   // held in a queue and run / resolved when the database is ready.
-  _query(query, values = [], background = false) {
+  _query(query, values = [], background = false, logQueryPlanDebugOutput = true) {
     return new Promise((resolve, reject) => {
       if (!this._open) {
         this._waiting.push(() => this._query(query, values).then(resolve, reject));
@@ -320,7 +320,9 @@ class DatabaseStore extends NylasStore {
         const planString = `${plan.map(row => row.detail).join('\n')} for ${query}`;
         const quiet = ['ThreadCounts', 'ThreadSearch', 'ContactSearch', 'COVERING INDEX'];
 
-        if (planString.includes('SCAN') && !quiet.find(str => planString.includes(str))) {
+        if (planString.includes('SCAN') &&
+            !quiet.find(str => planString.includes(str)) &&
+            logQueryPlanDebugOutput) {
           console.log("Consider setting the .background() flag on this query to avoid blocking the event loop:")
           this._prettyConsoleLog(planString);
         }
@@ -574,7 +576,7 @@ class DatabaseStore extends NylasStore {
   //   - resolves with the result of the database query.
   //
   run(modelQuery, options = {format: true}) {
-    return this._query(modelQuery.sql(), [], modelQuery._background).then((result) => {
+    return this._query(modelQuery.sql(), [], modelQuery._background, modelQuery._logQueryPlanDebugOutput).then((result) => {
       let transformed = modelQuery.inflateResult(result);
       if (options.format !== false) {
         transformed = modelQuery.formatResult(transformed)