perf(MySQL): improved connections pool handling

README.md

@@ -83,8 +83,8 @@ This is a roadmap with major features will come in near future.
 #### • ARM
 
 - [ ] Windows
-- [ ] Linux
+- [x] Linux
-- [ ] MacOS
+- [x] MacOS
 
 ## Translations
 

src/main/libs/clients/MySQLClient.js

@@ -1,5 +1,5 @@
 'use strict';
-import mysql from 'mysql2';
+import mysql from 'mysql2/promise';
 import { AntaresCore } from '../AntaresCore';
 import dataTypes from 'common/data-types/mysql';
 
@@ -102,8 +102,10 @@ export class MySQLClient extends AntaresCore {
     * @memberof MySQLClient
     */
    async connect () {
+      delete this._params.application_name;
+
       if (!this._poolSize)
-         this._connection = mysql.createConnection(this._params);
+         this._connection = await mysql.createConnection(this._params);
       else {
          this._connection = mysql.createPool({
             ...this._params,
@@ -1273,6 +1275,8 @@ export class MySQLClient extends AntaresCore {
     * @memberof MySQLClient
     */
    async raw (sql, args) {
+      if (process.env.NODE_ENV === 'development') this._logger(sql);// TODO: replace BLOB content with a placeholder
+
       args = {
          nest: false,
          details: false,
@@ -1280,15 +1284,15 @@ export class MySQLClient extends AntaresCore {
          ...args
       };
 
-      if (args.schema && args.schema !== 'public')
-         await this.use(args.schema);
-
       const nestTables = args.nest ? '.' : false;
       const resultsArr = [];
       let paramsArr = [];
       const queries = args.split ? sql.split(/((?:[^;'"]*(?:"(?:\\.|[^"])*"|'(?:\\.|[^'])*')[^;'"]*)+)|;/gm) : [sql];
+      const isPool = typeof this._connection.getConnection === 'function';
+      const connection = isPool ? await this._connection.getConnection() : this._connection;
 
-      if (process.env.NODE_ENV === 'development') this._logger(sql);// TODO: replace BLOB content with a placeholder
+      if (args.schema)
+         await connection.query(`USE \`${args.schema}\``);
 
       for (const query of queries) {
          if (!query) continue;
@@ -1297,13 +1301,10 @@ export class MySQLClient extends AntaresCore {
          let keysArr = [];
 
          const { rows, report, fields, keys, duration } = await new Promise((resolve, reject) => {
-            this._connection.query({ sql: query, nestTables }, async (err, response, fields) => {
+            connection.query({ sql: query, nestTables }).then(async ([response, fields]) => {
                timeStop = new Date();
                const queryResult = response;
 
-               if (err)
-                  reject(err);
-               else {
                let remappedFields = fields
                   ? fields.map(field => {
                      if (!field || Array.isArray(field))
@@ -1371,13 +1372,14 @@ export class MySQLClient extends AntaresCore {
                   fields: remappedFields,
                   keys: keysArr
                });
-               }
+            }).catch(reject);
-            });
          });
 
          resultsArr.push({ rows, report, fields, keys, duration });
       }
 
+      if (isPool) connection.release();
+
       return resultsArr.length === 1 ? resultsArr[0] : resultsArr;
    }
 }

src/renderer/components/WorkspaceQueryTable.vue

@@ -368,7 +368,6 @@ export default {
       },
       setNull () {
          const row = this.localResults.find(row => this.selectedRows.includes(row._id));
-         delete row._id;
 
          const params = {
             primary: this.primaryField.name,