This is an automated cherry-pick of #40235

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
pingcap · Feb 14, 2023 · fc55d12 · fc55d12
1 parent 5fa25e8
commit fc55d12
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Showing 5 changed files with 21 additions and 5 deletions.
diff --git a/expression/builtin_compare.go b/expression/builtin_compare.go
@@ -1585,7 +1585,7 @@ func (c *compareFunctionClass) refineArgs(ctx sessionctx.Context, args []Express
  } else {
  return args
  }
- } else if ctx.GetSessionVars().StmtCtx.SkipPlanCache {
+ } else if !ctx.GetSessionVars().StmtCtx.UseCache {
  // We should remove the mutable constant for correctness, because its value may be changed.
  RemoveMutableConst(ctx, args)
  }

diff --git a/expression/util.go b/expression/util.go
@@ -1239,7 +1239,7 @@ func ContainCorrelatedColumn(exprs []Expression) bool {
 // TODO: Do more careful check here.
 func MaybeOverOptimized4PlanCache(ctx sessionctx.Context, exprs []Expression) bool {
  // If we do not enable plan cache, all the optimization can work correctly.
- if !ctx.GetSessionVars().StmtCtx.UseCache || ctx.GetSessionVars().StmtCtx.SkipPlanCache {
+ if !ctx.GetSessionVars().StmtCtx.UseCache {
  return false
  }
  return containMutableConst(ctx, exprs)

diff --git a/planner/core/expression_rewriter.go b/planner/core/expression_rewriter.go
@@ -1553,8 +1553,13 @@ func (er *expressionRewriter) inToExpression(lLen int, not bool, tp *types.Field
  if c.GetType().EvalType() == types.ETInt {
  continue // no need to refine it
  }
+<<<<<<< HEAD
  er.sctx.GetSessionVars().StmtCtx.SkipPlanCache = true
  er.sctx.GetSessionVars().StmtCtx.AppendWarning(errors.Errorf("skip plan-cache: '%v' may be converted to INT", c.String()))
+=======
+ } else if !er.sctx.GetSessionVars().StmtCtx.UseCache {
+ // We should remove the mutable constant for correctness, because its value may be changed.
+>>>>>>> ffaf2ac9eee (planner: remove the unnecessary skip-plan-cache flag in StmtCtx (#40235))
  expression.RemoveMutableConst(er.sctx, []expression.Expression{c})
  }
  args[i], isExceptional = expression.RefineComparedConstant(er.sctx, *leftFt, c, opcode.EQ)

diff --git a/planner/core/plan_cache.go b/planner/core/plan_cache.go
@@ -276,7 +276,7 @@ func generateNewPlan(ctx context.Context, sctx sessionctx.Context, isGeneralPlan
  if containTableDual(p) && paramNum > 0 {
  stmtCtx.SkipPlanCache = true
  }
- if stmtAst.UseCache && !stmtCtx.SkipPlanCache && !ignorePlanCache {
+ if stmtCtx.UseCache && !ignorePlanCache {
  // rebuild key to exclude kv.TiFlash when stmt is not read only
  if _, isolationReadContainTiFlash := sessVars.IsolationReadEngines[kv.TiFlash]; isolationReadContainTiFlash && !IsReadOnly(stmtAst.Stmt, sessVars) {
  delete(sessVars.IsolationReadEngines, kv.TiFlash)
@@ -636,7 +636,7 @@ func CheckPreparedPriv(sctx sessionctx.Context, stmt *PlanCacheStmt, is infosche
 // short paths for these executions, currently "point select" and "point update"
 func tryCachePointPlan(_ context.Context, sctx sessionctx.Context,
  stmt *PlanCacheStmt, _ infoschema.InfoSchema, p Plan) error {
- if !sctx.GetSessionVars().StmtCtx.UseCache || sctx.GetSessionVars().StmtCtx.SkipPlanCache {
+ if !sctx.GetSessionVars().StmtCtx.UseCache {
  return nil
  }
  var (

diff --git a/sessionctx/stmtctx/stmtctx.go b/sessionctx/stmtctx/stmtctx.go
@@ -171,7 +171,6 @@ type StatementContext struct {
  InNullRejectCheck bool
  AllowInvalidDate bool
  IgnoreNoPartition bool
- SkipPlanCache bool
  IgnoreExplainIDSuffix bool
  SkipUTF8Check bool
  SkipASCIICheck bool
@@ -597,6 +596,18 @@ func (sc *StatementContext) SetPlanHint(hint string) {
  sc.planHint = hint
 }
 
+<<<<<<< HEAD
+=======
+// SetSkipPlanCache sets to skip the plan cache and records the reason.
+func (sc *StatementContext) SetSkipPlanCache(reason error) {
+ if !sc.UseCache {
+ return // avoid unnecessary warnings
+ }
+ sc.UseCache = false
+ sc.AppendWarning(reason)
+}
+
+>>>>>>> ffaf2ac9eee (planner: remove the unnecessary skip-plan-cache flag in StmtCtx (#40235))
 // TableEntry presents table in db.
 type TableEntry struct {
  DB string