type UserMigrateColumn struct {
		ID       uint
		Name     string
		Salary   float64
		Birthday time.Time `gorm:"precision:4"`
	}

	DB.Migrator().DropTable(&UserMigrateColumn{})

	DB.AutoMigrate(&UserMigrateColumn{})

	type UserMigrateColumn2 struct {
		ID                  uint
		Name                string    `gorm:"size:128"`
		Salary              float64   `gorm:"precision:2"`

// row. They have an output for each input row.
//
// Some types of a queries are not valid. For example, an aggregation
// function combined with a row function is meaningless ("AVG(s.Age) +
// s.Salary"). Analysis determines if such a scenario exists so an
// error can be returned.

var (
	// Fatal error for query processing.
	errNestedAggregation      = errors.New("Cannot nest aggregations")

      values:
      - default
    - key: istio-injection
      operator: DoesNotExist
  objectSelector:
    matchExpressions:
    - key: istio.io/rev
      operator: NotIn
      values:
      - canary
  reinvocationPolicy: Never
  rules:
  - apiGroups:
    - ""
    apiVersions:
    - v1
    operations:
    - CREATE
    resources:
    - pods
    scope: '*'
  sideEffects: None

      values:
      - default
    - key: istio-injection
      operator: DoesNotExist
  objectSelector:
    matchExpressions:
    - key: istio.io/rev
      operator: NotIn
      values:
      - canary
  reinvocationPolicy: Never
  rules:
  - apiGroups:
    - ""
    apiVersions:
    - v1
    operations:
    - CREATE
    resources:
    - pods
    scope: '*'
  sideEffects: None

```yaml
meshConfig:
  accessLogFile: /dev/stdout
```

#### Revisions

Control plane revisions allow deploying multiple versions of the control plane in the same cluster.
This allows safe [canary upgrades](https://istio.io/latest/docs/setup/upgrade/canary/)

```yaml
revision: my-revision-name

	}
	baseAssertions := []assertion{
		{empty, empty, ""},
		{empty, revLabel, "istiod-canary"},
		{empty, objEnabled, "istiod"},
		{empty, objEnabledAndRev, "istiod-canary"},
		{revLabel, empty, "istiod-canary"},
		{revLabel, revLabel, "istiod-canary"},
		{revLabel, objEnabled, "istiod-canary"},
		{revLabel, objEnabledAndRev, "istiod-canary"},
		{legacyLabel, empty, "istiod"},
		{legacyLabel, objEnabled, "istiod"},

fork of the Istio helm templates, refactored to increase modularity and isolation.

Goals:
- Improve upgrade experience: users should be able to gradually roll upgrades, with proper
canary deployments for Istio components. It should be possible to deploy a new version while keeping the
stable version in place and gradually migrate apps to the new version.

			webhook:     revisionCanonicalWebhook,
			tagName:     "canary",
			whURL:       "",
			whSVC:       "istiod-revision",
			whCA:        "ca",
			numWebhooks: 2,
		},
		{
			name:        "webhook-pointing-to-url",
			webhook:     revisionCanonicalWebhookRemote,
			tagName:     "canary",
			whURL:       remoteInjectionURL,
			whSVC:       "",
			whCA:        "ca",

			wantException: true,
		},
		{ // case 6: new --revision argument
			args:           strings.Split("--revision canary", " "),
			expectedString: "NAME     CLUSTER     CDS     LDS     EDS     RDS     ECDS     ISTIOD",
			revision:       "canary",
		},
		{ // case 7: supplying type that doesn't select pods should fail
			args:          strings.Split("serviceaccount/sleep", " "),
			wantException: true,

    istio.io/rev: {{ .Values.revision }}
    {{- else }}
    # Label used by the 'default' service. For versioned deployments we match with app and version.
    # This avoids default deployment picking the canary
    istio: pilot
    {{- end }}
  {{- if .Values.pilot.ipFamilyPolicy }}
  ipFamilyPolicy: {{ .Values.pilot.ipFamilyPolicy }}
  {{- end }}
  {{- if .Values.pilot.ipFamilies }}
  ipFamilies: