planner: increase the maximum number limit of TopN when analyzing tables (#45962)

ref #45919

Author: qw4990

planner/core/planbuilder.go

@@ -2945,7 +2945,7 @@ var CMSketchSizeLimit = kv.TxnEntrySizeLimit / binary.MaxVarintLen32
 
 var analyzeOptionLimit = map[ast.AnalyzeOptionType]uint64{
 	ast.AnalyzeOptNumBuckets:    1024,
-	ast.AnalyzeOptNumTopN:       1024,
+	ast.AnalyzeOptNumTopN:       16384,
 	ast.AnalyzeOptCMSketchWidth: CMSketchSizeLimit,
 	ast.AnalyzeOptCMSketchDepth: CMSketchSizeLimit,
 	ast.AnalyzeOptNumSamples:    500000,

statistics/handle/handletest/analyze/analyze_test.go

@@ -154,7 +154,7 @@ func TestAnalyzeGlobalStatsWithOpts1(t *testing.T) {
 		{77, 219, false},
 		{-31, 222, true},
 		{10, -77, true},
-		{10000, 47, true},
+		{100000, 47, true},
 		{77, 47000, true},
 	}
 	for _, ca := range cases {