fix(postgresql): search path with datatypes that use dynamic oids (#9148)

lib/dialects/postgres/connection-manager.js

@@ -208,7 +208,16 @@ class ConnectionManager extends AbstractConnectionManager {
     return (connection || this.sequelize).query(
       "SELECT typname, typtype, oid, typarray FROM pg_type WHERE (typtype = 'b' AND typname IN ('hstore', 'geometry', 'geography')) OR (typtype = 'e')"
     ).then(results => {
-      const result = Array.isArray(results) ? results.pop() : results;
+      let result = Array.isArray(results) ? results.pop() : results;
+
+      // When searchPath is prepended then two statements are executed and the result is
+      // an array of those two statements. First one is the SET search_path and second is
+      // the SELECT query result.
+      if (Array.isArray(result)) {
+        if (result[0].command === 'SET') {
+          result = result.pop();
+        }
+      }
 
       // Reset OID mapping for dynamic type
       [

test/integration/model/searchPath.test.js

@@ -18,7 +18,6 @@ let locationId;
 
 describe(Support.getTestDialectTeaser('Model'), () => {
   if (current.dialect.supports.searchPath) {
-
     describe('SEARCH PATH', () => {
       before(function() {
         this.Restaurant = current.define('restaurant', {
@@ -27,7 +26,8 @@ describe(Support.getTestDialectTeaser('Model'), () => {
         },
         {tableName: 'restaurants'});
         this.Location = current.define('location', {
-          name: DataTypes.STRING
+          name: DataTypes.STRING,
+          type: DataTypes.ENUM('a', 'b')
         },
         {tableName: 'locations'});
         this.Employee = current.define('employee', {
@@ -51,7 +51,6 @@ describe(Support.getTestDialectTeaser('Model'), () => {
         });
       });
 
-
       beforeEach('build restaurant tables', function() {
         const Restaurant = this.Restaurant;
         return current.createSchema('schema_one').then(() => {
@@ -71,6 +70,12 @@ describe(Support.getTestDialectTeaser('Model'), () => {
         });
       });
 
+      describe('enum case', () => {
+        it('able to refresh enum when searchPath is used', function () {
+          return this.Location.sync({ force: true });
+        });
+      });
+
       describe('Add data via model.create, retrieve via model.findOne', () => {
         it('should be able to insert data into the table in schema_one using create', function() {
           const Restaurant = this.Restaurant;
@@ -292,7 +297,6 @@ describe(Support.getTestDialectTeaser('Model'), () => {
           });
         });
 
-
         it('should be able to insert and retrieve associated data into the table in schema_two', function() {
           const Restaurant = this.Restaurant;
           const Location = this.Location;
@@ -379,7 +383,6 @@ describe(Support.getTestDialectTeaser('Model'), () => {
           });
         });
 
-
         it('should be able to insert and retrieve associated data into the table in schema_two', function() {
           const Restaurant = this.Restaurant;
           const Employee = this.Employee;