This is an automated cherry-pick of pingcap#40312

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>

planner/core/expression_rewriter.go

@@ -1485,6 +1485,7 @@ func (er *expressionRewriter) inToExpression(lLen int, not bool, tp *types.Field
 			if c, ok := args[i].(*expression.Constant); ok {
 				var isExceptional bool
 				if expression.MaybeOverOptimized4PlanCache(er.sctx, []expression.Expression{c}) {
+<<<<<<< HEAD
 					if c.GetType().EvalType() == types.ETString {
 						// To keep the result be compatible with MySQL, refine `int non-constant <cmp> str constant`
 						// here and skip this refine operation in all other cases for safety.
@@ -1495,6 +1496,12 @@ func (er *expressionRewriter) inToExpression(lLen int, not bool, tp *types.Field
 					}
 				} else if er.sctx.GetSessionVars().StmtCtx.SkipPlanCache {
 					// We should remove the mutable constant for correctness, because its value may be changed.
+=======
+					if c.GetType().EvalType() == types.ETInt {
+						continue // no need to refine it
+					}
+					er.sctx.GetSessionVars().StmtCtx.SetSkipPlanCache(errors.Errorf("skip plan-cache: '%v' may be converted to INT", c.String()))
+>>>>>>> be112dc31d (planner: skip plan-cache for prepared queries with `INT in (Decimals...)` (#40312))
 					expression.RemoveMutableConst(er.sctx, []expression.Expression{c})
 				}
 				args[i], isExceptional = expression.RefineComparedConstant(er.sctx, *leftFt, c, opcode.EQ)