feat(sql_workbench): support GaussDB / PostgreSQL in SQL workbench whitelist

- SupportDBType: add DBTypeGaussDB + DBTypePostgreSQL to whitelist
  (EARS-1.2 / decision-3 positive coverage for KF-2)
- convertDBType: add "GaussDB" -> "GAUSSDB" mapping immediately after
  the existing "PostgreSQL" -> "POSTGRESQL" mapping (EARS-1.3 / CR-12
  case-sensitivity normalization)
- unit tests:
  - Test_convertDBType: new "GaussDB" case (13 total); existing
    "PostgreSQL" / "Unknown passthrough" regressed unchanged
  - Test_SupportDBType: flip "PostgreSQL" expected from false to true
    (decision-3 lock); new "GaussDB supported" + "GaussDBForMySQL
    unsupported" cases; existing SQL Server negative regression kept
  - Test_SupportDBType_GaussDB_PG_family_consistency: hard assertion
    PG family (PostgreSQL + GaussDB) whitelist coupling

Related: actiontech/dms-ee#865

Author: LordofAvernus

internal/sql_workbench/service/sql_workbench_service.go

@@ -925,13 +925,15 @@ func (sqlWorkbenchService *SqlWorkbenchService) buildUpdateDatasourceRequest(ctx
 // convertDBType 转换数据库类型
 func (sqlWorkbenchService *SqlWorkbenchService) convertDBType(dmsDBType string) string {
 	// 这里需要根据实际的数据库类型映射关系进行转换
-	// ODC目前支持的数据源有: OB_MYSQL, OB_ORACLE, ORACLE, MYSQL, ODP_SHARDING_OB_MYSQL, DORIS, POSTGRESQL
+	// ODC目前支持的数据源有: OB_MYSQL, OB_ORACLE, ORACLE, MYSQL, ODP_SHARDING_OB_MYSQL, DORIS, POSTGRESQL, GAUSSDB
 	// 其余调用创建数据源接口会直接失败
 	switch dmsDBType {
 	case "MySQL":
 		return "MYSQL"
 	case "PostgreSQL":
 		return "POSTGRESQL"
+	case "GaussDB":
+		return "GAUSSDB"
 	case "Oracle":
 		return "ORACLE"
 	case "SQL Server":
@@ -963,7 +965,9 @@ func (sqlWorkbenchService *SqlWorkbenchService) SupportDBType(dbType pkgConst.DB
 		dbType == pkgConst.DBTypeTiDB ||
 		dbType == pkgConst.DBTypeTDSQLForInnoDB ||
 		dbType == pkgConst.DBTypeGoldenDB ||
-		dbType == pkgConst.DBTypePolarDBForMySQL
+		dbType == pkgConst.DBTypePolarDBForMySQL ||
+		dbType == pkgConst.DBTypeGaussDB ||
+		dbType == pkgConst.DBTypePostgreSQL
 }
 
 // buildDatabaseUser 当是ob-mysql时需要给账号管理的账号附加租户名集群名等字符: root@oms_mysql#oms_resource_4250

internal/sql_workbench/service/sql_workbench_service_test.go

@@ -23,6 +23,7 @@ func Test_convertDBType(t *testing.T) {
 		"TDSQL For InnoDB":     {input: "TDSQL For InnoDB", expected: "MYSQL"},
 		"GoldenDB":            {input: "GoldenDB", expected: "MYSQL"},
 		"PolarDB For MySQL":   {input: "PolarDB For MySQL", expected: "MYSQL"},
+		"GaussDB":             {input: "GaussDB", expected: "GAUSSDB"},
 		"Unknown passthrough": {input: "UnknownDB", expected: "UnknownDB"},
 	}
 	for name, tc := range cases {
@@ -48,9 +49,11 @@ func Test_SupportDBType(t *testing.T) {
 		"TiDB supported":        {input: pkgConst.DBTypeTiDB, expected: true},
 		"TDSQL supported":       {input: pkgConst.DBTypeTDSQLForInnoDB, expected: true},
 		"GoldenDB supported":    {input: pkgConst.DBTypeGoldenDB, expected: true},
-		"PostgreSQL unsupported": {input: pkgConst.DBTypePostgreSQL, expected: false},
+		"PostgreSQL supported":   {input: pkgConst.DBTypePostgreSQL, expected: true},
 		"SQL Server unsupported": {input: pkgConst.DBTypeSQLServer, expected: false},
 		"PolarDB For MySQL supported":  {input: pkgConst.DBTypePolarDBForMySQL, expected: true},
+		"GaussDB supported":            {input: pkgConst.DBTypeGaussDB, expected: true},
+		"GaussDBForMySQL unsupported":  {input: pkgConst.DBTypeGaussDBForMySQL, expected: false},
 	}
 	for name, tc := range cases {
 		t.Run(name, func(t *testing.T) {
@@ -61,3 +64,15 @@ func Test_SupportDBType(t *testing.T) {
 		})
 	}
 }
+
+func Test_SupportDBType_GaussDB_PG_family_consistency(t *testing.T) {
+	svc := &SqlWorkbenchService{}
+	// CR-13: design §1.2 decision-3 locks PG family (PostgreSQL + GaussDB)
+	// must be whitelisted together; SQL workbench routing assumes the pair.
+	if got := svc.SupportDBType(pkgConst.DBTypePostgreSQL); !got {
+		t.Errorf("PostgreSQL must be supported (CR-13 / EARS-1.2)")
+	}
+	if got := svc.SupportDBType(pkgConst.DBTypeGaussDB); !got {
+		t.Errorf("GaussDB must be supported (EARS-1.2 / decision-3)")
+	}
+}