fix(postgres/connection-manager): Don't leak OIDs between instances (#9026)

lib/dialects/postgres/connection-manager.js

@@ -31,6 +31,7 @@ class ConnectionManager extends AbstractConnectionManager {
       throw err;
     }
 
+    this._clearTypeParser();
     this.refreshTypeParser(dataTypes.postgres);
   }
 
@@ -38,27 +39,46 @@ class ConnectionManager extends AbstractConnectionManager {
   _refreshTypeParser(dataType) {
     if (dataType.types.postgres.oids) {
       for (const oid of dataType.types.postgres.oids) {
-        this.lib.types.setTypeParser(oid, value => dataType.parse(value, oid, this.lib.types.getTypeParser));
+        this.oidMap[oid] = value => dataType.parse(value, oid, this.lib.types.getTypeParser);
       }
     }
 
     if (dataType.types.postgres.array_oids) {
       for (const oid of dataType.types.postgres.array_oids) {
-        this.lib.types.setTypeParser(oid, value =>
-          this.lib.types.arrayParser.create(value, v =>
+        this.arrayOidMap[oid] = value => {
+          return this.lib.types.arrayParser.create(value, v =>
             dataType.parse(v, oid, this.lib.types.getTypeParser)
-          ).parse()
-        );
+          ).parse();
+        };
       }
     }
   }
 
+  _clearTypeParser() {
+    this.oidMap = {};
+    this.arrayOidMap = {};
+  }
+
+  getTypeParser(oid) {
+    if (this.oidMap[oid]) {
+      return this.oidMap[oid];
+    } else if (this.arrayOidMap[oid]) {
+      return this.arrayOidMap[oid];
+    }
+
+    return this.lib.types.getTypeParser.apply(undefined, arguments);
+  }
+
   connect(config) {
     config.user = config.username;
     const connectionConfig = _.pick(config, [
       'user', 'password', 'host', 'database', 'port'
     ]);
 
+    connectionConfig.types = {
+      getTypeParser: ConnectionManager.prototype.getTypeParser.bind(this)
+    };
+
     if (config.dialectOptions) {
       _.merge(connectionConfig,
         _.pick(config.dialectOptions, [

test/integration/data-types.test.js

@@ -16,29 +16,7 @@ const chai = require('chai'),
 describe(Support.getTestDialectTeaser('DataTypes'), () => {
   afterEach(function() {
     // Restore some sanity by resetting all parsers
-    switch (dialect) {
-      case 'postgres':
-        const types = this.sequelize.connectionManager.lib.types;
-
-        _.each(DataTypes, dataType => {
-          if (dataType.types && dataType.types.postgres) {
-            dataType.types.postgres.oids.forEach(oid => {
-              types.setTypeParser(oid, _.identity);
-            });
-          }
-        });
-
-        require('pg-types/lib/binaryParsers').init((oid, converter) => {
-          types.setTypeParser(oid, 'binary', converter);
-        });
-        require('pg-types/lib/textParsers').init((oid, converter) => {
-          types.setTypeParser(oid, 'text', converter);
-        });
-        break;
-      default:
-        this.sequelize.connectionManager._clearTypeParser();
-    }
-
+    this.sequelize.connectionManager._clearTypeParser();
     this.sequelize.connectionManager.refreshTypeParser(DataTypes[dialect]); // Reload custom parsers
   });