statsitstics: avoid sync load column which is skiped type to analyze (#57144) (#57968)

close #57138

Author: ti-chi-bot

pkg/statistics/handle/BUILD.bazel

@@ -59,7 +59,7 @@ go_test(
     embed = [":handle"],
     flaky = True,
     race = "on",
-    shard_count = 10,
+    shard_count = 11,
     deps = [
         "//pkg/config",
         "//pkg/parser/model",

pkg/statistics/handle/handle_hist.go

@@ -29,6 +29,7 @@ import (
 	"github.com/pingcap/tidb/pkg/parser/mysql"
 	"github.com/pingcap/tidb/pkg/sessionctx"
 	"github.com/pingcap/tidb/pkg/sessionctx/stmtctx"
+	"github.com/pingcap/tidb/pkg/sessionctx/variable"
 	"github.com/pingcap/tidb/pkg/statistics"
 	"github.com/pingcap/tidb/pkg/statistics/handle/storage"
 	utilstats "github.com/pingcap/tidb/pkg/statistics/handle/util"
@@ -285,6 +286,13 @@ func (h *Handle) handleOneItemTask(task *NeededItemTask) (err error) {
 			h.SPool().Put(se)
 		}
 	}()
+	var skipTypes map[string]struct{}
+	val, err := sctx.GetSessionVars().GlobalVarsAccessor.GetGlobalSysVar(variable.TiDBAnalyzeSkipColumnTypes)
+	if err != nil {
+		logutil.BgLogger().Warn("failed to get global variable", zap.Error(err))
+	} else {
+		skipTypes = variable.ParseAnalyzeSkipColumnTypes(val)
+	}
 
 	item := task.TableItemID
 	tbl, ok := h.Get(item.TableID)
@@ -305,7 +313,14 @@ func (h *Handle) handleOneItemTask(task *NeededItemTask) (err error) {
 		} else {
 			wrapper.col = col
 		}
+		if skipTypes != nil && wrapper.col != nil && wrapper.col.Info != nil {
+			_, skip := skipTypes[types.TypeToStr(wrapper.col.Info.FieldType.GetType(), wrapper.col.Info.FieldType.GetCharset())]
+			if skip {
+				return nil
+			}
+		}
 	}
+	failpoint.Inject("handleOneItemTaskPanic", nil)
 	t := time.Now()
 	needUpdate := false
 	wrapper, err = h.readStatsForOneItem(sctx, item, wrapper)

pkg/statistics/handle/handle_hist_test.go

@@ -51,6 +51,22 @@ func TestSyncLoadSkipUnAnalyzedItems(t *testing.T) {
 	failpoint.Disable("github.com/pingcap/tidb/pkg/statistics/handle/assertSyncLoadItems")
 }
 
+func TestSyncLoadSkipAnalyzSkipColumnItems(t *testing.T) {
+	store, dom := testkit.CreateMockStoreAndDomain(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("create table t(`id` bigint(20) NOT NULL AUTO_INCREMENT,content text,PRIMARY KEY (`id`))")
+	h := dom.StatsHandle()
+	h.SetLease(1)
+
+	tk.MustExec("analyze table t")
+	tk.MustExec("set @@session.tidb_analyze_skip_column_types = 'json, text, blob'") // text is not default.
+	require.NoError(t, failpoint.Enable("github.com/pingcap/tidb/pkg/statistics/handle/syncload/handleOneItemTaskPanic", `panic`))
+	tk.MustQuery("trace plan select * from t where content ='ab'")
+	require.NoError(t, failpoint.Disable("github.com/pingcap/tidb/pkg/statistics/handle/syncload/handleOneItemTaskPanic"))
+}
+
 func TestConcurrentLoadHist(t *testing.T) {
 	store, dom := testkit.CreateMockStoreAndDomain(t)