diff --git a/pkg/parser/generate_keyword/genkeyword.go b/pkg/parser/generate_keyword/genkeyword.go
index c0a72646e9..0c89c2b8fc 100644
--- a/pkg/parser/generate_keyword/genkeyword.go
+++ b/pkg/parser/generate_keyword/genkeyword.go
@@ -76,8 +76,6 @@ var keywordRe *regexp.Regexp
 // example data:
 //
 //	add               "ADD"
-//
-// Note that all keywords except `TiDB_CURRENT_TSO` are fully uppercase.
 func parseLine(line string) string {
 	if keywordRe == nil {
 		keywordRe = regexp.MustCompile(`^\s+\w+\s+"(\w+)"$`)
diff --git a/pkg/parser/generate_keyword/genkeyword_test.go b/pkg/parser/generate_keyword/genkeyword_test.go
index 2a7a7d5b24..8e3f49fac4 100644
--- a/pkg/parser/generate_keyword/genkeyword_test.go
+++ b/pkg/parser/generate_keyword/genkeyword_test.go
@@ -10,6 +10,6 @@ func TestParseLine(t *testing.T) {
 	add := parseLine("	add               \"ADD\"")
 	require.Equal(t, add, "ADD")
 
-	tso := parseLine("	tidbCurrentTSO    \"TiDB_CURRENT_TSO\"")
-	require.Equal(t, tso, "TiDB_CURRENT_TSO")
+	tso := parseLine("	tidbCurrentTSO    \"TIDB_CURRENT_TSO\"")
+	require.Equal(t, tso, "TIDB_CURRENT_TSO")
 }
diff --git a/pkg/parser/keywords.go b/pkg/parser/keywords.go
index cd047a436a..3eef0c62be 100644
--- a/pkg/parser/keywords.go
+++ b/pkg/parser/keywords.go
@@ -222,6 +222,7 @@ var Keywords = []KeywordsType{
 	{"TABLESAMPLE", true, "reserved"},
 	{"TERMINATED", true, "reserved"},
 	{"THEN", true, "reserved"},
+	{"TIDB_CURRENT_TSO", true, "reserved"},
 	{"TINYBLOB", true, "reserved"},
 	{"TINYINT", true, "reserved"},
 	{"TINYTEXT", true, "reserved"},
@@ -229,7 +230,6 @@ var Keywords = []KeywordsType{
 	{"TRAILING", true, "reserved"},
 	{"TRIGGER", true, "reserved"},
 	{"TRUE", true, "reserved"},
-	{"TiDB_CURRENT_TSO", true, "reserved"},
 	{"UNION", true, "reserved"},
 	{"UNIQUE", true, "reserved"},
 	{"UNLOCK", true, "reserved"},
diff --git a/pkg/parser/parser.go b/pkg/parser/parser.go
index 70bb16d6c1..31590d3617 100644
--- a/pkg/parser/parser.go
+++ b/pkg/parser/parser.go
@@ -814,7 +814,7 @@ const (
 	then                       = 57559
 	tiFlash                    = 58159
 	tidb                       = 58158
-	tidbCurrentTSO             = 57567
+	tidbCurrentTSO             = 57560
 	tidbJson                   = 58065
 	tikvImporter               = 57936
 	timeDuration               = 58066
@@ -822,11 +822,11 @@ const (
 	timestampAdd               = 58067
 	timestampDiff              = 58068
 	timestampType              = 57938
-	tinyIntType                = 57561
-	tinyblobType               = 57560
-	tinytextType               = 57562
+	tinyIntType                = 57562
+	tinyblobType               = 57561
+	tinytextType               = 57563
 	tls                        = 58069
-	to                         = 57563
+	to                         = 57564
 	toTSO                      = 57349
 	toTimestamp                = 57348
 	tokenIssuer                = 57939
@@ -846,13 +846,13 @@ const (
 	tpch10                     = 57941
 	trace                      = 57942
 	traditional                = 57943
-	trailing                   = 57564
+	trailing                   = 57565
 	transaction                = 57944
-	trigger                    = 57565
+	trigger                    = 57566
 	triggers                   = 57945
 	trim                       = 58080
 	trueCardCost               = 58081
-	trueKwd                    = 57566
+	trueKwd                    = 57567
 	truncate                   = 57946
 	tsoType                    = 57947
 	ttl                        = 57948
@@ -1571,7 +1571,7 @@ var (
 		57371: 641,  // between (835x)
 		57425: 642,  // falseKwd (833x)
 		57354: 643,  // singleAtIdentifier (833x)
-		57566: 644,  // trueKwd (833x)
+		57567: 644,  // trueKwd (833x)
 		57396: 645,  // currentUser (828x)
 		57447: 646,  // ilike (827x)
 		57526: 647,  // regexpKwd (827x)
@@ -1639,7 +1639,7 @@ var (
 		57516: 709,  // percentRank (804x)
 		57521: 710,  // rank (804x)
 		57538: 711,  // rowNumber (804x)
-		57567: 712,  // tidbCurrentTSO (804x)
+		57560: 712,  // tidbCurrentTSO (804x)
 		57577: 713,  // utcDate (804x)
 		57578: 714,  // utcTime (804x)
 		57579: 715,  // utcTimestamp (804x)
@@ -1653,7 +1653,7 @@ var (
 		57382: 723,  // character (768x)
 		57449: 724,  // index (752x)
 		57488: 725,  // match (739x)
-		57563: 726,  // to (647x)
+		57564: 726,  // to (647x)
 		57366: 727,  // analyze (641x)
 		57573: 728,  // update (637x)
 		46:    729,  // '.' (626x)
@@ -1703,9 +1703,9 @@ var (
 		57493: 773,  // middleIntType (552x)
 		57503: 774,  // numericType (552x)
 		57543: 775,  // smallIntType (552x)
-		57560: 776,  // tinyblobType (552x)
-		57561: 777,  // tinyIntType (552x)
-		57562: 778,  // tinytextType (552x)
+		57561: 776,  // tinyblobType (552x)
+		57562: 777,  // tinyIntType (552x)
+		57563: 778,  // tinytextType (552x)
 		57348: 779,  // toTimestamp (552x)
 		57349: 780,  // toTSO (552x)
 		57380: 781,  // change (550x)
@@ -2032,7 +2032,7 @@ var (
 		58799: 1102, // TableOrTables (3x)
 		58811: 1103, // TextType (3x)
 		58818: 1104, // TransactionChars (3x)
-		57565: 1105, // trigger (3x)
+		57566: 1105, // trigger (3x)
 		58821: 1106, // Type (3x)
 		57570: 1107, // unlock (3x)
 		57572: 1108, // until (3x)
@@ -2430,7 +2430,7 @@ var (
 		58804: 1500, // TableSampleOpt (1x)
 		58805: 1501, // TableSampleUnitOpt (1x)
 		58807: 1502, // TableToTableList (1x)
-		57564: 1503, // trailing (1x)
+		57565: 1503, // trailing (1x)
 		58819: 1504, // TrimDirection (1x)
 		58831: 1505, // UserToUserList (1x)
 		58833: 1506, // UserVariableList (1x)
diff --git a/pkg/parser/parser.y b/pkg/parser/parser.y
index 67c86d27f8..2687306e20 100644
--- a/pkg/parser/parser.y
+++ b/pkg/parser/parser.y
@@ -274,6 +274,7 @@ import (
 	tableSample       "TABLESAMPLE"
 	terminated        "TERMINATED"
 	then              "THEN"
+	tidbCurrentTSO    "TIDB_CURRENT_TSO"
 	tinyblobType      "TINYBLOB"
 	tinyIntType       "TINYINT"
 	tinytextType      "TINYTEXT"
@@ -281,7 +282,6 @@ import (
 	trailing          "TRAILING"
 	trigger           "TRIGGER"
 	trueKwd           "TRUE"
-	tidbCurrentTSO    "TiDB_CURRENT_TSO"
 	union             "UNION"
 	unique            "UNIQUE"
 	unlock            "UNLOCK"
@@ -7950,7 +7950,7 @@ FunctionNameOptionalBraces:
 |	"CURRENT_DATE"
 |	"CURRENT_ROLE"
 |	"UTC_DATE"
-|	"TiDB_CURRENT_TSO"
+|	"TIDB_CURRENT_TSO"
 
 FunctionNameDatetimePrecision:
 	"CURRENT_TIME"
diff --git a/pkg/parser/reserved_words_test.go b/pkg/parser/reserved_words_test.go
index 35eed1f0ae..f8a82c9315 100644
--- a/pkg/parser/reserved_words_test.go
+++ b/pkg/parser/reserved_words_test.go
@@ -70,7 +70,7 @@ func TestCompareReservedWordsWithMySQL(t *testing.T) {
 			"TABLESAMPLE",      // Only in TiDB
 			"ARRAY",            // added in 8.0.17 (reserved); became nonreserved in 8.0.19
 			"ILIKE",            // Only in TiDB
-			"TiDB_CURRENT_TSO", // Only in TiDB
+			"TIDB_CURRENT_TSO", // Only in TiDB
 			"UNTIL":            // Present in both, reserved only in TiDB
 			// special cases: we do reserve these words but MySQL didn't,
 			// and unreservering it causes legit parser conflict.