First of all you must drink enough water, 2 to 3 litres everyday. If you sweat much or do hard physical work you have to drink more.

Drinking water during or after a meal will not make any problems for digestion. Indeed, water helps digestion. They will not dilute digestive juices or interfere with digestion. Water and other fluids help to break down the food in your stomach. It keeps also the digestive system healthy.

Eat enough fresh or frozen fruits and vegetables and whole grain products. Healthy life style and enough physical activity will keep your digestion good. Try to live a stress free life.

Do not drink water or eat your food very quickly. If you gulp lot of air with that you may get stomach problems.

So the direct answer is drinking water during or after meal is good.