planner: fix the issue that bindings with query-level hint can not ta…

…ke effect for replace statements (#54048) (#54092)

close #53834

bindinfo/session_handle_test.go

@@ -16,6 +16,7 @@ package bindinfo_test
 
 import (
 	"context"
+	"fmt"
 	"strconv"
 	"testing"
 	"time"
@@ -459,6 +460,29 @@ func TestDropSingleBindings(t *testing.T) {
 	require.Len(t, rows, 0)
 }
 
+func TestIssue53834(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec(`use test`)
+	tk.MustExec(`create table t (a varchar(1024))`)
+	tk.MustExec(`insert into t values (space(1024))`)
+	for i := 0; i < 12; i++ {
+		tk.MustExec(`insert into t select * from t`)
+	}
+	oomAction := tk.MustQuery(`select @@tidb_mem_oom_action`).Rows()[0][0].(string)
+	defer func() {
+		tk.MustExec(fmt.Sprintf(`set global tidb_mem_oom_action='%v'`, oomAction))
+	}()
+
+	tk.MustExec(`set global tidb_mem_oom_action='cancel'`)
+	err := tk.ExecToErr(`replace into t select /*+ memory_quota(1 mb) */ * from t`)
+	require.ErrorContains(t, err, "cancelled due to exceeding the allowed memory limit")
+
+	tk.MustExec(`create binding for replace into t select * from t using replace into t select /*+ memory_quota(1 mb) */ * from t`)
+	err = tk.ExecToErr(`replace into t select * from t`)
+	require.ErrorContains(t, err, "cancelled due to exceeding the allowed memory limit")
+}
+
 func TestPreparedStmt(t *testing.T) {
 	store := testkit.CreateMockStore(t)
 	tk := testkit.NewTestKit(t, store)

planner/optimize.go

@@ -206,7 +206,7 @@ func Optimize(ctx context.Context, sctx sessionctx.Context, node ast.Node, is in
 			}
 			metrics.BindUsageCounter.WithLabelValues(scope).Inc()
 			hint.BindHint(stmtNode, binding.Hint)
-			curStmtHints, _, curWarns := handleStmtHints(binding.Hint.GetFirstTableHints())
+			curStmtHints, _, curWarns := handleStmtHints(binding.Hint.GetStmtHints())
 			sessVars.StmtCtx.StmtHints = curStmtHints
 			// update session var by hint /set_var/
 			for name, val := range sessVars.StmtCtx.StmtHints.SetVars {

session/session_test/session_test.go

@@ -2185,11 +2185,11 @@ func TestStmtHints(t *testing.T) {
 	val = int64(1) * 1024 * 1024
 	require.True(t, tk.Session().GetSessionVars().MemTracker.CheckBytesLimit(val))
 
-	tk.MustExec("insert /*+ MEMORY_QUOTA(1 MB) */  into t1 select /*+ MEMORY_QUOTA(3 MB) */ * from t1;")
+	tk.MustExec("insert /*+ MEMORY_QUOTA(1 MB) */  into t1 select /*+ MEMORY_QUOTA(1 MB) */ * from t1;")
 	val = int64(1) * 1024 * 1024
 	require.True(t, tk.Session().GetSessionVars().MemTracker.CheckBytesLimit(val))
-	require.Len(t, tk.Session().GetSessionVars().StmtCtx.GetWarnings(), 1)
-	require.EqualError(t, tk.Session().GetSessionVars().StmtCtx.GetWarnings()[0].Err, "[util:3126]Hint MEMORY_QUOTA(`3145728`) is ignored as conflicting/duplicated.")
+	require.Len(t, tk.Session().GetSessionVars().StmtCtx.GetWarnings(), 2)
+	require.EqualError(t, tk.Session().GetSessionVars().StmtCtx.GetWarnings()[0].Err, "[util:3126]Hint MEMORY_QUOTA(`1048576`) is ignored as conflicting/duplicated.")
 
 	// Test NO_INDEX_MERGE hint
 	tk.Session().GetSessionVars().SetEnableIndexMerge(true)

util/hint/hint_processor.go

@@ -44,12 +44,20 @@ type HintsSet struct {
 	indexHints [][]*ast.IndexHint          // Slice offset is the traversal order of `TableName` in the ast.
 }
 
-// GetFirstTableHints gets the first table hints.
-func (hs *HintsSet) GetFirstTableHints() []*ast.TableOptimizerHint {
+// GetStmtHints gets all statement-level hints.
+func (hs *HintsSet) GetStmtHints() []*ast.TableOptimizerHint {
+	var result []*ast.TableOptimizerHint
 	if len(hs.tableHints) > 0 {
-		return hs.tableHints[0]
+		result = append(result, hs.tableHints[0]...) // keep the same behavior with prior implementation
 	}
-	return nil
+	for _, tHints := range hs.tableHints[1:] {
+		for _, h := range tHints {
+			if isStmtHint(h) {
+				result = append(result, h)
+			}
+		}
+	}
+	return result
 }
 
 // ContainTableHint checks whether the table hint set contains a hint.
@@ -88,7 +96,18 @@ func ExtractTableHintsFromStmtNode(node ast.Node, sctx sessionctx.Context) []*as
 	case *ast.InsertStmt:
 		// check duplicated hints
 		checkInsertStmtHintDuplicated(node, sctx)
-		return x.TableHints
+		result := make([]*ast.TableOptimizerHint, 0, len(x.TableHints))
+		result = append(result, x.TableHints...)
+		if x.Select != nil {
+			// support statement-level hint in sub-select: "insert into t select /* ... */ ..."
+			// TODO: support this for Update and Delete as well
+			for _, h := range ExtractTableHintsFromStmtNode(x.Select, sctx) {
+				if isStmtHint(h) {
+					result = append(result, h)
+				}
+			}
+		}
+		return result
 	case *ast.ExplainStmt:
 		return ExtractTableHintsFromStmtNode(x.Stmt, sctx)
 	case *ast.SetOprStmt:
@@ -634,3 +653,13 @@ func GenerateQBName(nodeType NodeType, blockOffset int) (model.CIStr, error) {
 	}
 	return model.NewCIStr(fmt.Sprintf("%s%d", defaultSelectBlockPrefix, blockOffset)), nil
 }
+
+// isStmtHint checks whether this hint is a statement-level hint.
+func isStmtHint(h *ast.TableOptimizerHint) bool {
+	switch h.HintName.L {
+	case "max_execution_time", "memory_quota", "resource_group":
+		return true
+	default:
+		return false
+	}
+}