Fix whereTime method for PostgresGrammar with correct casting. (#23323)

Link: https://www.postgresql.org/docs/9.6/static/functions-datetime.html

src/Illuminate/Database/Query/Grammars/PostgresGrammar.php

@@ -34,6 +34,20 @@ protected function whereDate(Builder $query, $where)
         return $this->wrap($where['column']).'::date '.$where['operator'].' '.$value;
     }
 
+    /**
+     * Compile a "where time" clause.
+     *
+     * @param  \Illuminate\Database\Query\Builder  $query
+     * @param  array  $where
+     * @return string
+     */
+    protected function whereTime(Builder $query, $where)
+    {
+        $value = $this->parameter($where['value']);
+
+        return $this->wrap($where['column']).'::time '.$where['operator'].' '.$value;
+    }
+
     /**
      * Compile a date based where clause.
      *

tests/Database/DatabaseQueryBuilderTest.php

@@ -340,11 +340,19 @@ public function testWhereTimeOperatorOptionalMySql()
         $this->assertEquals([0 => '22:00'], $builder->getBindings());
     }
 
+    public function testWhereTimePostgres()
+    {
+        $builder = $this->getPostgresBuilder();
+        $builder->select('*')->from('users')->whereTime('created_at', '>=', '22:00');
+        $this->assertEquals('select * from "users" where "created_at"::time >= ?', $builder->toSql());
+        $this->assertEquals([0 => '22:00'], $builder->getBindings());
+    }
+
     public function testWhereTimeOperatorOptionalPostgres()
     {
         $builder = $this->getPostgresBuilder();
         $builder->select('*')->from('users')->whereTime('created_at', '22:00');
-        $this->assertEquals('select * from "users" where extract(time from "created_at") = ?', $builder->toSql());
+        $this->assertEquals('select * from "users" where "created_at"::time = ?', $builder->toSql());
         $this->assertEquals([0 => '22:00'], $builder->getBindings());
     }