Remove unused TiDB nextgen version helpers from mysql/const.go

NormalizeTiDBReleaseVersionForNextGen, BuildTiDBXReleaseVersion, and
BuildTiDBXServerVersion were carried over from the upstream TiDB parser
but are TiDB-server release-packaging concerns rather than parsing
concerns. Inside this repository they were only referenced by their own
tests, so drop the helpers, the tests, and their supporting constants.

The legacyTiDBReleaseVersionPlaceholder constant doubled as the initial
value of the externally visible TiDBReleaseVersion variable, so inline
the placeholder string there.

This drops the github.com/coreos/go-semver dependency, which was used
solely by BuildTiDBXReleaseVersion.

https://claude.ai/code/session_011eUiTSJanyruVRnV5b7fJw

Author: claude

go.mod

@@ -3,7 +3,6 @@ module github.com/sqlc-dev/marino
 go 1.25
 
 require (
-	github.com/coreos/go-semver v0.3.1
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/pingcap/errors v0.11.5-0.20250523034308-74f78ae071ee
 	github.com/pingcap/failpoint v0.0.0-20240528011301-b51a646c7c86

go.sum

@@ -1,5 +1,3 @@
-github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
-github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

mysql/const.go

@@ -17,7 +17,6 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/coreos/go-semver/semver"
 	"github.com/pingcap/errors"
 	"github.com/sqlc-dev/marino/format"
 )
@@ -33,77 +32,17 @@ const (
 	// one with MySQL compatibility version, with this fixed then we can parse TiDB
 	// version from ServerVersion.
 	VersionSeparator = "-TiDB-"
-
-	// tidbXReleaseVersionPrefix is used in `select tidb_version()` output of nextgen.
-	tidbXReleaseVersionPrefix = "CLOUD."
-
-	legacyTiDBReleaseVersionPlaceholder = "v8.4.0-this-is-a-placeholder"
-	// tidbXPlaceholderReleaseVersion is the default release version for nextgen when no
-	// release version is injected during build, such as when running in IDE.
-	tidbXPlaceholderReleaseVersion = "v26.3.0-this-is-a-placeholder"
-	// TiDBXVerMinYear is set to 2025 just for sanity check.
-	// our first release of next-gen since 2025
-	TiDBXVerMinYear = 2025
-	// TiDBXVerMaxYear is set to 2099 just for sanity check, we don't expect the
-	// year part of release version to be larger than this.
-	// enough for now.
-	TiDBXVerMaxYear = 2099
 )
 
 // Version information.
 var (
 	// TiDBReleaseVersion is initialized by (git describe --tags) in Makefile.
-	TiDBReleaseVersion = legacyTiDBReleaseVersionPlaceholder
+	TiDBReleaseVersion = "v8.4.0-this-is-a-placeholder"
 
 	// ServerVersion is the version information of this tidb-server in MySQL's format.
 	ServerVersion = fmt.Sprintf("%s%s%s", mysqlCompatibilityVersion, VersionSeparator, TiDBReleaseVersion)
 )
 
-// NormalizeTiDBReleaseVersionForNextGen rewrites the legacy placeholder into a nextgen
-// placeholder that follows `v[2-digit-year].[month].[fix-version]`.
-// pkg/parser is Golang project, it cannot use kerneltype pkg to conditionally
-// compile different code for next-gen and classic, so we have to rewrite the
-// placeholder value in this function.
-func NormalizeTiDBReleaseVersionForNextGen(releaseVersion string) string {
-	// the version is not set if we run next-gen tidb from IDE.
-	if releaseVersion == legacyTiDBReleaseVersionPlaceholder {
-		return tidbXPlaceholderReleaseVersion
-	}
-	return releaseVersion
-}
-
-// BuildTiDBXReleaseVersion converts mysql.TiDBReleaseVersion into the nextgen visible
-// version format `CLOUD.<4-digit-year-2-digit-month>.<fix-version><optional-pre-release>`.
-func BuildTiDBXReleaseVersion(releaseVersion string) (string, error) {
-	if !strings.HasPrefix(releaseVersion, "v") {
-		return "", errors.Errorf("invalid TiDB release version %q, should start with 'v'", releaseVersion)
-	}
-	rawVer := strings.TrimPrefix(releaseVersion, "v")
-	ver, err := semver.NewVersion(rawVer)
-	if err != nil {
-		return "", errors.Errorf("invalid TiDB release version %q, expect a semantic version", releaseVersion)
-	}
-	year := 2000 + ver.Major
-	if year < TiDBXVerMinYear || year > TiDBXVerMaxYear || ver.Minor < 1 || ver.Minor > 12 {
-		return "", errors.Errorf("invalid TiDB release version %q, the semantic version part should be in [2-digit-year].[month].[fix-version]-[xxx] format", releaseVersion)
-	}
-	preRelease := string(ver.PreRelease)
-	if preRelease != "" {
-		preRelease = "-" + preRelease
-	}
-	return fmt.Sprintf("%s%d%02d.%d%s", tidbXReleaseVersionPrefix, year, ver.Minor, ver.Patch, preRelease), nil
-}
-
-// BuildTiDBXServerVersion converts mysql.TiDBReleaseVersion into MySQL server version
-// format `8.0.11-TiDB-CLOUD.<4-digit-year-2-digit-month>.<fix-version>`.
-func BuildTiDBXServerVersion(releaseVersion string) (string, error) {
-	tidbXReleaseVersion, err := BuildTiDBXReleaseVersion(releaseVersion)
-	if err != nil {
-		return "", err
-	}
-	return fmt.Sprintf("%s%s%s", mysqlCompatibilityVersion, VersionSeparator, tidbXReleaseVersion), nil
-}
-
 // Header information.
 const (
 	OKHeader          byte = 0x00

mysql/const_test.go

@@ -14,10 +14,8 @@
 package mysql
 
 import (
-	"testing"
-
 	"reflect"
-	"strings"
+	"testing"
 )
 
 func TestSQLMode(t *testing.T) {
@@ -104,53 +102,3 @@ func TestVersionSeparator(t *testing.T) {
 		t.Fatalf("got %v, want %v", VersionSeparator, "-TiDB-")
 	}
 }
-
-func TestBuildTiDBXReleaseVersion(t *testing.T) {
-	tidbXVersion, err := BuildTiDBXReleaseVersion("v26.3.0")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !reflect.DeepEqual("CLOUD.202603.0", tidbXVersion) {
-		t.Fatalf("got %v, want %v", tidbXVersion, "CLOUD.202603.0")
-	}
-
-	tidbXVersion, err = BuildTiDBXReleaseVersion("v26.3.0-xxx")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !reflect.DeepEqual("CLOUD.202603.0-xxx", tidbXVersion) {
-		t.Fatalf("got %v, want %v", tidbXVersion, "CLOUD.202603.0-xxx")
-	}
-
-	serverVersion, err := BuildTiDBXServerVersion("v26.3.0")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !reflect.DeepEqual("8.0.11-TiDB-CLOUD.202603.0", serverVersion) {
-		t.Fatalf("got %v, want %v", serverVersion, "8.0.11-TiDB-CLOUD.202603.0")
-	}
-
-	serverVersion, err = BuildTiDBXServerVersion("v26.3.0-xxx")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !reflect.DeepEqual("8.0.11-TiDB-CLOUD.202603.0-xxx", serverVersion) {
-		t.Fatalf("got %v, want %v", serverVersion, "8.0.11-TiDB-CLOUD.202603.0-xxx")
-	}
-
-	for _, ver := range []string{"26.1.1", "v26xxxx", "v24.1.1", "v26.0.1", "v26.13.1"} {
-		_, err = BuildTiDBXReleaseVersion(ver)
-		if err == nil || !strings.Contains(err.Error(), "invalid TiDB release version") {
-			t.Fatalf("expected error containing %q, got %v", "invalid TiDB release version", err)
-		}
-	}
-}
-
-func TestNormalizeTiDBReleaseVersionForNextGen(t *testing.T) {
-	if !reflect.DeepEqual(tidbXPlaceholderReleaseVersion, NormalizeTiDBReleaseVersionForNextGen(legacyTiDBReleaseVersionPlaceholder)) {
-		t.Fatalf("got %v, want %v", NormalizeTiDBReleaseVersionForNextGen(legacyTiDBReleaseVersionPlaceholder), tidbXPlaceholderReleaseVersion)
-	}
-	if !reflect.DeepEqual("v26.3.0", NormalizeTiDBReleaseVersionForNextGen("v26.3.0")) {
-		t.Fatalf("got %v, want %v", NormalizeTiDBReleaseVersionForNextGen("v26.3.0"), "v26.3.0")
-	}
-}