sql: improve tenant records

This commit contains the following changes:
- rename "state" to "data_state", "active" to "ready"
- stored, non-virtual columns for "name", "data_state", "service_mode"
- deprecate the column "active" since it mirrors "data_state'
- move `descpb.TenantInfo` to new package `mtinfopb`.

Details follow.

**rename TenantInfo.State to DataState, "ACTIVE" to "READY"**

We've discovered that we'd like to separate the readiness of the data
from the activation of the service. To emphasize this, this commit
renames the field "State" to "DataState".

Additionally, the state "ACTIVE" was confusing as it suggests that
something is running, whereas it merely marks the tenant data as ready
for use. So this commit also renames that state accordingly.

**new tenant info field ServiceMode**

Summary of changes:
- the new TenantInfo.ServiceMode field indicates how to run servers.
- new syntax: `ALTER TENANT ... START SERVICE EXTERNAL/SHARED`,
  `ALTER TENANT ... STOP SERVICE`.
- tenants created via `create_tenant(<id>)`
  (via CC serverless control plane) start in service mode EXTERNAL.
- other tenants start in service mode NONE.
- need ALTER TENANT STOP SERVICE before dropping a tenant.
  - except in the case of `crdb_internal.destroy_tenant`
    for compat with CC serverless control plane.

**make the output columns of SHOW TENANT lowercase**

All the SHOW statements report status-like data in lowercase.
SHOW TENANT(s) should not be different.

**use actual SQL columns for the TenantInfo fields**

Release note: None

docs/generated/sql/bnf/stmt_block.bnf

@@ -1338,11 +1338,13 @@ unreserved_keyword ::=
 	| 'SEQUENCE'
 	| 'SEQUENCES'
 	| 'SERVER'
+	| 'SERVICE'
 	| 'SESSION'
 	| 'SESSIONS'
 	| 'SET'
 	| 'SETS'
 	| 'SHARE'
+	| 'SHARED'
 	| 'SHOW'
 	| 'SIMPLE'
 	| 'SKIP'
@@ -1361,6 +1363,7 @@ unreserved_keyword ::=
 	| 'STATEMENTS'
 	| 'STATISTICS'
 	| 'STDIN'
+	| 'STOP'
 	| 'STORAGE'
 	| 'STORE'
 	| 'STORED'

pkg/BUILD.bazel

@@ -1274,6 +1274,7 @@ GO_TARGETS = [
     "//pkg/kv/kvserver:kvserver_test",
     "//pkg/kv:kv",
     "//pkg/kv:kv_test",
+    "//pkg/multitenant/mtinfopb:mtinfopb",
     "//pkg/multitenant/multitenantcpu:multitenantcpu",
     "//pkg/multitenant/multitenantio:multitenantio",
     "//pkg/multitenant/tenantcapabilities/tenantcapabilitiesauthorizer:tenantcapabilitiesauthorizer",
@@ -2626,6 +2627,7 @@ GET_X_DATA_TARGETS = [
     "//pkg/kv/kvserver/txnwait:get_x_data",
     "//pkg/kv/kvserver/uncertainty:get_x_data",
     "//pkg/multitenant:get_x_data",
+    "//pkg/multitenant/mtinfopb:get_x_data",
     "//pkg/multitenant/multitenantcpu:get_x_data",
     "//pkg/multitenant/multitenantio:get_x_data",
     "//pkg/multitenant/tenantcapabilities:get_x_data",

pkg/ccl/backupccl/BUILD.bazel

@@ -66,6 +66,7 @@ go_library(
         "//pkg/kv/kvserver/concurrency/lock",
         "//pkg/kv/kvserver/protectedts",
         "//pkg/kv/kvserver/protectedts/ptpb",
+        "//pkg/multitenant/mtinfopb",
         "//pkg/roachpb",
         "//pkg/scheduledjobs",
         "//pkg/scheduledjobs/schedulebase",
@@ -227,6 +228,7 @@ go_test(
         "//pkg/kv/kvserver/protectedts",
         "//pkg/kv/kvserver/protectedts/ptpb",
         "//pkg/kv/kvserver/protectedts/ptutil",
+        "//pkg/multitenant/mtinfopb",
         "//pkg/roachpb",
         "//pkg/scheduledjobs",
         "//pkg/scheduledjobs/schedulebase",

pkg/ccl/backupccl/backup_metadata_test.go

@@ -21,6 +21,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/ccl/backupccl/backuppb"
 	"github.com/cockroachdb/cockroach/pkg/ccl/backupccl/backuptestutils"
 	"github.com/cockroachdb/cockroach/pkg/cloud"
+	"github.com/cockroachdb/cockroach/pkg/multitenant/mtinfopb"
 	"github.com/cockroachdb/cockroach/pkg/roachpb"
 	"github.com/cockroachdb/cockroach/pkg/security/username"
 	"github.com/cockroachdb/cockroach/pkg/sql"
@@ -242,8 +243,8 @@ func checkIntroducedSpans(
 func checkTenants(
 	ctx context.Context, t *testing.T, m *backuppb.BackupManifest, bm *backupinfo.BackupMetadata,
 ) {
-	var metaTenants []descpb.TenantInfoWithUsage
-	var tenant descpb.TenantInfoWithUsage
+	var metaTenants []mtinfopb.TenantInfoWithUsage
+	var tenant mtinfopb.TenantInfoWithUsage
 	it := bm.TenantIter(ctx)
 	defer it.Close()
 

pkg/ccl/backupccl/backup_planning.go

@@ -32,6 +32,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/kv"
 	"github.com/cockroachdb/cockroach/pkg/kv/kvserver/protectedts"
 	"github.com/cockroachdb/cockroach/pkg/kv/kvserver/protectedts/ptpb"
+	"github.com/cockroachdb/cockroach/pkg/multitenant/mtinfopb"
 	"github.com/cockroachdb/cockroach/pkg/roachpb"
 	"github.com/cockroachdb/cockroach/pkg/scheduledjobs"
 	"github.com/cockroachdb/cockroach/pkg/server/telemetry"
@@ -1325,9 +1326,9 @@ func checkForNewTables(
 
 func getTenantInfo(
 	ctx context.Context, codec keys.SQLCodec, txn isql.Txn, jobDetails jobspb.BackupDetails,
-) ([]roachpb.Span, []descpb.TenantInfoWithUsage, error) {
+) ([]roachpb.Span, []mtinfopb.TenantInfoWithUsage, error) {
 	var spans []roachpb.Span
-	var tenants []descpb.TenantInfoWithUsage
+	var tenants []mtinfopb.TenantInfoWithUsage
 	var err error
 	if jobDetails.FullCluster && codec.ForSystemTenant() {
 		// Include all tenants.
@@ -1422,7 +1423,7 @@ func createBackupManifest(
 	}
 
 	var spans []roachpb.Span
-	var tenants []descpb.TenantInfoWithUsage
+	var tenants []mtinfopb.TenantInfoWithUsage
 	tenantSpans, tenantInfos, err := getTenantInfo(
 		ctx, execCfg.Codec, txn, jobDetails,
 	)

pkg/ccl/backupccl/backup_planning_tenant.go

@@ -11,8 +11,8 @@ package backupccl
 import (
 	"context"
 
+	"github.com/cockroachdb/cockroach/pkg/multitenant/mtinfopb"
 	"github.com/cockroachdb/cockroach/pkg/roachpb"
-	"github.com/cockroachdb/cockroach/pkg/sql/catalog/descpb"
 	"github.com/cockroachdb/cockroach/pkg/sql/isql"
 	"github.com/cockroachdb/cockroach/pkg/sql/sem/tree"
 	"github.com/cockroachdb/cockroach/pkg/util/protoutil"
@@ -22,82 +22,115 @@ import (
 const tenantMetadataQuery = `
 SELECT
   tenants.id,                        /* 0 */
-  tenants.active,                    /* 1 */
-  tenants.info,                      /* 2 */
-  tenant_usage.ru_burst_limit,       /* 3 */
-  tenant_usage.ru_refill_rate,       /* 4 */
-  tenant_usage.ru_current,           /* 5 */
-  tenant_usage.total_consumption     /* 6 */
+  tenants.info,                      /* 1 */
+  tenants.name,                      /* 2 */
+  tenants.data_state,                /* 3 */
+  tenants.service_mode,              /* 4 */
+  tenant_usage.ru_burst_limit,       /* 5 */
+  tenant_usage.ru_refill_rate,       /* 6 */
+  tenant_usage.ru_current,           /* 7 */
+  tenant_usage.total_consumption     /* 8 */
 FROM
   system.tenants
   LEFT JOIN system.tenant_usage ON
 	  tenants.id = tenant_usage.tenant_id AND tenant_usage.instance_id = 0
 `
 
-func tenantMetadataFromRow(row tree.Datums) (descpb.TenantInfoWithUsage, error) {
-	if len(row) != 7 {
-		return descpb.TenantInfoWithUsage{}, errors.AssertionFailedf(
+func tenantMetadataFromRow(row tree.Datums) (mtinfopb.TenantInfoWithUsage, error) {
+	if len(row) != 9 {
+		return mtinfopb.TenantInfoWithUsage{}, errors.AssertionFailedf(
 			"unexpected row size %d from tenant metadata query", len(row),
 		)
 	}
 
 	id := uint64(tree.MustBeDInt(row[0]))
-	res := descpb.TenantInfoWithUsage{
-		TenantInfo: descpb.TenantInfo{
+	res := mtinfopb.TenantInfoWithUsage{
+		TenantInfo: mtinfopb.TenantInfo{
+			// for compatibility
+			DeprecatedID: id,
+		},
+		TenantInfoWithUsage_ExtraColumns: mtinfopb.TenantInfoWithUsage_ExtraColumns{
 			ID: id,
 		},
 	}
-	infoBytes := []byte(tree.MustBeDBytes(row[2]))
+	infoBytes := []byte(tree.MustBeDBytes(row[1]))
 	if err := protoutil.Unmarshal(infoBytes, &res.TenantInfo); err != nil {
-		return descpb.TenantInfoWithUsage{}, err
+		return mtinfopb.TenantInfoWithUsage{}, err
+	}
+	if row[2] != tree.DNull {
+		res.Name = roachpb.TenantName(tree.MustBeDString(row[2]))
+	}
+	if row[3] != tree.DNull {
+		res.DataState = mtinfopb.TenantDataState(tree.MustBeDInt(row[3]))
+	} else {
+		// Pre-v23.1 info struct.
+		switch res.TenantInfo.DeprecatedDataState {
+		case mtinfopb.TenantInfo_READY:
+			res.DataState = mtinfopb.DataStateReady
+		case mtinfopb.TenantInfo_ADD:
+			res.DataState = mtinfopb.DataStateAdd
+		case mtinfopb.TenantInfo_DROP:
+			res.DataState = mtinfopb.DataStateDrop
+			return res, errors.AssertionFailedf("unhandled: %d", res.TenantInfo.DeprecatedDataState)
+		}
+	}
+	res.ServiceMode = mtinfopb.ServiceModeNone
+	if row[4] != tree.DNull {
+		res.ServiceMode = mtinfopb.TenantServiceMode(tree.MustBeDInt(row[4]))
+	} else if res.DataState == mtinfopb.DataStateReady {
+		// Records created for CC Serverless pre-v23.1.
+		res.ServiceMode = mtinfopb.ServiceModeExternal
 	}
 	// If this tenant had no reported consumption and its token bucket was not
 	// configured, the tenant_usage values are all NULL.
 	//
 	// It should be sufficient to check any one value, but we check all of them
 	// just to be defensive (in case the table contains invalid data).
-	for _, d := range row[3:5] {
+	for _, d := range row[5:] {
 		if d == tree.DNull {
 			return res, nil
 		}
 	}
-	res.Usage = &descpb.TenantInfoWithUsage_Usage{
-		RUBurstLimit: float64(tree.MustBeDFloat(row[3])),
-		RURefillRate: float64(tree.MustBeDFloat(row[4])),
-		RUCurrent:    float64(tree.MustBeDFloat(row[5])),
+	res.Usage = &mtinfopb.TenantInfoWithUsage_Usage{
+		RUBurstLimit: float64(tree.MustBeDFloat(row[5])),
+		RURefillRate: float64(tree.MustBeDFloat(row[6])),
+		RUCurrent:    float64(tree.MustBeDFloat(row[7])),
 	}
-	if row[6] != tree.DNull {
-		consumptionBytes := []byte(tree.MustBeDBytes(row[6]))
+	if row[8] != tree.DNull {
+		consumptionBytes := []byte(tree.MustBeDBytes(row[8]))
 		if err := protoutil.Unmarshal(consumptionBytes, &res.Usage.Consumption); err != nil {
-			return descpb.TenantInfoWithUsage{}, err
+			return mtinfopb.TenantInfoWithUsage{}, err
 		}
 	}
 	return res, nil
 }
 
 func retrieveSingleTenantMetadata(
 	ctx context.Context, txn isql.Txn, tenantID roachpb.TenantID,
-) (descpb.TenantInfoWithUsage, error) {
+) (mtinfopb.TenantInfoWithUsage, error) {
 	row, err := txn.QueryRow(
 		ctx, "backupccl.retrieveSingleTenantMetadata", txn.KV(),
 		tenantMetadataQuery+` WHERE id = $1`, tenantID.ToUint64(),
 	)
 	if err != nil {
-		return descpb.TenantInfoWithUsage{}, err
+		return mtinfopb.TenantInfoWithUsage{}, err
 	}
 	if row == nil {
-		return descpb.TenantInfoWithUsage{}, errors.Errorf("tenant %s does not exist", tenantID)
+		return mtinfopb.TenantInfoWithUsage{}, errors.Errorf("tenant %s does not exist", tenantID)
+	}
+	info, err := tenantMetadataFromRow(row)
+	if err != nil {
+		return mtinfopb.TenantInfoWithUsage{}, err
 	}
-	if !tree.MustBeDBool(row[1]) {
-		return descpb.TenantInfoWithUsage{}, errors.Errorf("tenant %s is not active", tenantID)
+	if info.DataState != mtinfopb.DataStateReady {
+		return mtinfopb.TenantInfoWithUsage{}, errors.Errorf("tenant %s is not active", tenantID)
 	}
-
-	return tenantMetadataFromRow(row)
+	return info, nil
 }
 
 func retrieveAllTenantsMetadata(
 	ctx context.Context, txn isql.Txn,
-) ([]descpb.TenantInfoWithUsage, error) {
+) ([]mtinfopb.TenantInfoWithUsage, error) {
 	rows, err := txn.QueryBuffered(
 		ctx, "backupccl.retrieveAllTenantsMetadata", txn.KV(),
 		// TODO(?): Should we add a `WHERE active`? We require the tenant to be active
@@ -109,7 +142,7 @@ func retrieveAllTenantsMetadata(
 	if err != nil {
 		return nil, err
 	}
-	res := make([]descpb.TenantInfoWithUsage, len(rows))
+	res := make([]mtinfopb.TenantInfoWithUsage, len(rows))
 	for i := range rows {
 		res[i], err = tenantMetadataFromRow(rows[i])
 		if err != nil {