Tag a BigQuery table by using Data Catalog

This quickstart helps you complete the following tasks:

  1. Create a BigQuery dataset and table.

  2. Create a tag template with a schema that defines five tag fields of distinct types. These are string, double, boolean, enumerated, and richtext.

  3. Lookup the Data Catalog entry for your table.

  4. In the Google Cloud console, create business metadata for your entry that includes an overview, data steward, and a tag.

Data Catalog lets you search and tag entries such as BigQuery tables with metadata. Some examples of metadata that you can use for tagging include public and private tags, data stewards, and rich text overview.

Before you begin

  1. Set up your project.
    1. Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.
    2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

      Go to project selector

    3. Enable the Data Catalog and BigQuery APIs.

      Enable the APIs

    4. Install and initialize the Google Cloud CLI.
    5. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

      Go to project selector

    6. Enable the Data Catalog and BigQuery APIs.

      Enable the APIs

    7. Install and initialize the Google Cloud CLI.

Add a public data entry to your project

Data Catalog entries include data resources such as a BigQuery dataset or a Pub/Sub topic.

  • Add a public dataset to your project.

    1. In console, go to the BigQuery page.

      Go to BigQuery

    2. In the Explorer section, click + ADD DATA and select Explore public datasets from the drop-down list.

    3. In the Marketplace panel, search for New York taxi trips and click the relevant search result.

    4. Click View Dataset.

Create a dataset and a table

  1. Create a dataset.

    1. In the console, open the BigQuery page.

      Go to BigQuery

    2. In the Explorer panel, select the project where you want to create the dataset.

    3. Click the Actions icon and click Create dataset.

    4. In the Create dataset page, fill in the following details:

      • For Dataset ID, enter demo_dataset.
      • For Data location, select US multi-region.
      • Enable table expiration and specify the number of days.
      • For Encryption, leave the Google-managed key option selected.
      • Click Create dataset.

  2. Copy a publicly accessible table to demo_dataset.

    1. In the console, open the BigQuery page.

      Go to BigQuery

    2. In the Explorer pane, search for tlc_yellow_trips tables and select one of them, such as tlc_yellow_trips_2017. Then click Copy.

    3. In the Copy table pane, fill in the following information:

      1. In the Project name drop-down list, select your project.
      2. In the Dataset name drop-down list, select demo_dataset.
      3. For the Table name, enter trips, then click Copy.
    4. In the Explorer pane, confirm that the trips table is listed in demo_dataset.

You add Data Catalog tags to the table in the next section.

Create a public tag template and attach a tag for your entry

You must be the dataset owner to attach a tag to a table in the dataset. For more information about public and private tags, see Public and private tags.

In a tag template, tag fields are optional. You do not have to provide a value for a field when attaching a tag to a Data Catalog entry. However, if a template defines a field as required, you must provide a value for the field. If the value is not provided, an error is generated.

You can use lower case letters and underscores to define field names. The tag template fields created in this example are just demo fields and are not auto-updated or synced with BigQuery.

Console

  1. Go to the Dataplex > Tag Templates page.

    Go to Dataplex tag templates

  2. Click Create tag template and enter the following details:

    1. Enter the Template name as Demo Tag Template.
    2. Retain the default location.
    3. Retain the tag template visibility as Public.
    4. Click Add field to add 5 fields. Use the following table and keep Field description empty.

      Field display name Field ID Required field Type
      Source of data asset source Yes String
      Rows in the asset num_rows No Double
      Has PII has_pii No Boolean
      PII type pii_type No Enumerated

      Add values EMAIL_ADDRESS, US_SOCIAL_SECURITY_NUMBER, and NONE.

      Context context No Richtext
  3. Click Create.

    The Template details page lists all the information about the tag template.

  4. To attach a tag to demo_dataset, go to the Dataplex search page.

    Go to Dataplex

  5. In the search box, enter demo_dataset. In the search result, you see the demo_dataset dataset and the trips table.

  6. Click the trips table. A BigQuery table details page opens.

  7. Click Attach tags.

  8. In the Attach tags panel, enter the following details:

    1. Select the target as trips.
    2. Select the tag template as Demo Tag Template.
    3. For tag values, enter the following details:
      • Source of data asset: Copied from tlc_yellow_trips_2017
      • Number of rows in the data asset: 113496874
      • Has PII: FALSE
      • PII type: NONE
    4. Click Save.

      The tag fields are now listed in the Tags section in the BigQuery table details.

gcloud

Run the gcloud data-catalog tag-templates create command shown below to create a tag template with the following five tag fields:

  1. display_name: Source of data asset
    id: source
    required: TRUE
    type: String
  2. display_name: Number of rows in the data asset
    id: num_rows
    required: FALSE
    type: Double
  3. display_name: Has PII
    id: has_pii
    required: FALSE
    type: Boolean
  4. display_name: PII type
    id: pii_type
    required: FALSE
    type: Enumerated
    values:
    1. EMAIL_ADDRESS
    2. US_SOCIAL_SECURITY_NUMBER
    3. NONE
# -------------------------------
# Create a Tag Template.
# -------------------------------
gcloud data-catalog tag-templates create demo_template \
    --location=us-central1 \
    --display-name="Demo Tag Template" \
    --field=id=source,display-name="Source of data asset",type=string,required=TRUE \
    --field=id=num_rows,display-name="Number of rows in the data asset",type=double \
    --field=id=has_pii,display-name="Has PII",type=bool \
    --field=id=pii_type,display-name="PII type",type='enum(EMAIL_ADDRESS|US_SOCIAL_SECURITY_NUMBER|NONE)'

# -------------------------------
# Lookup the Data Catalog entry for the table.
# -------------------------------
ENTRY_NAME=$(gcloud data-catalog entries lookup '//bigquery.googleapis.com/projects/PROJECT_ID/datasets/DATASET/tables/TABLE' --format="value(name)")

# -------------------------------
# Attach a Tag to the table.
# -------------------------------

# Create the Tag file.
cat > tag_file.json << EOF
  {
    "source": "BigQuery",
    "num_rows": 1000,
    "has_pii": true,
    "pii_type": "EMAIL_ADDRESS"
  }
EOF

gcloud data-catalog tags create --entry=${ENTRY_NAME} \
    --tag-template=demo_template --tag-template-location=us-central1 --tag-file=tag_file.json

Go

Before trying this sample, follow the Go setup instructions in the Data Catalog quickstart using client libraries. For more information, see the Data Catalog Go API reference documentation.


// The datacatalog_quickstart application demonstrates how to define a tag
// template, populate values in the template, and attach a tag based on the
// template to a BigQuery table.
package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"strings"
	"time"

	datacatalog "cloud.google.com/go/datacatalog/apiv1"
	datacatalogpb "google.golang.org/genproto/googleapis/cloud/datacatalog/v1"
)

func main() {
	projectID := flag.String("project_id", "", "Cloud Project ID, used for session creation.")
	location := flag.String("location", "us-central1", "data catalog region to use for the quickstart")
	table := flag.String("table", "myproject.mydataset.mytable", "bigquery table to tag in project.dataset.table format")

	flag.Parse()

	ctx := context.Background()
	client, err := datacatalog.NewClient(ctx)
	if err != nil {
		log.Fatalf("datacatalog.NewClient: %v", err)
	}
	defer client.Close()

	// Create the tag template.
	tmpl, err := createQuickstartTagTemplate(ctx, client, *projectID, *location)
	if err != nil {
		log.Fatalf("createQuickstartTagTemplate: %v", err)
	}
	fmt.Printf("Created tag template: %s\n", tmpl.GetName())

	// Convert a BigQuery resource identifier into the equivalent datacatalog
	// format.
	resource, err := convertBigQueryResourceRepresentation(*table)
	if err != nil {
		log.Fatalf("couldn't parse --table flag (%s): %v", *table, err)
	}

	// Lookup the entry metadata for the BQ table resource.
	entry, err := client.LookupEntry(ctx, &datacatalogpb.LookupEntryRequest{
		TargetName: &datacatalogpb.LookupEntryRequest_LinkedResource{
			LinkedResource: resource,
		},
	})
	if err != nil {
		log.Fatalf("client.LookupEntry: %v", err)
	}
	fmt.Printf("Successfully looked up table entry: %s\n", entry.GetName())

	// Create a tag based on the template, and apply it to the entry.
	tag, err := createQuickstartTag(ctx, client, "my-quickstart-tag", tmpl.GetName(), entry.GetName())
	if err != nil {
		log.Fatalf("couldn't create tag: %v", err)
	}
	fmt.Printf("Created tag: %s", tag.GetName())
}

// createQuickstartTagTemplate registers a tag template in datacatalog.
func createQuickstartTagTemplate(ctx context.Context, client *datacatalog.Client, projectID, location string) (*datacatalogpb.TagTemplate, error) {
	loc := fmt.Sprintf("projects/%s/locations/%s", projectID, location)

	// Define the tag template.
	template := &datacatalogpb.TagTemplate{
		DisplayName: "Quickstart Tag Template",
		Fields: map[string]*datacatalogpb.TagTemplateField{
			"source": {
				DisplayName: "Source of data asset",
				Type: &datacatalogpb.FieldType{
					TypeDecl: &datacatalogpb.FieldType_PrimitiveType_{
						PrimitiveType: datacatalogpb.FieldType_STRING,
					},
				},
			},
			"num_rows": {
				DisplayName: "Number of rows in data asset",
				Type: &datacatalogpb.FieldType{
					TypeDecl: &datacatalogpb.FieldType_PrimitiveType_{
						PrimitiveType: datacatalogpb.FieldType_DOUBLE,
					},
				},
			},
			"has_pii": {
				DisplayName: "Has PII",
				Type: &datacatalogpb.FieldType{
					TypeDecl: &datacatalogpb.FieldType_PrimitiveType_{
						PrimitiveType: datacatalogpb.FieldType_BOOL,
					},
				},
			},
			"pii_type": {
				DisplayName: "PII Type",
				Type: &datacatalogpb.FieldType{
					TypeDecl: &datacatalogpb.FieldType_EnumType_{
						EnumType: &datacatalogpb.FieldType_EnumType{
							AllowedValues: []*datacatalogpb.FieldType_EnumType_EnumValue{
								{DisplayName: "EMAIL"},
								{DisplayName: "SOCIAL SECURITY NUMBER"},
								{DisplayName: "NONE"},
							},
						},
					},
				},
			},
		},
	}

	//Construct the creation request using the template definition.
	req := &datacatalogpb.CreateTagTemplateRequest{
		Parent:        loc,
		TagTemplateId: "quickstart_tag_template",
		TagTemplate:   template,
	}

	return client.CreateTagTemplate(ctx, req)

}

// createQuickstartTag populates tag values according to the template, and attaches
// the tag to the designeated entry.
func createQuickstartTag(ctx context.Context, client *datacatalog.Client, tagID, templateName, entryName string) (*datacatalogpb.Tag, error) {
	tag := &datacatalogpb.Tag{
		Name:     fmt.Sprintf("%s/tags/%s", entryName, tagID),
		Template: templateName,
		Fields: map[string]*datacatalogpb.TagField{
			"source": {
				Kind: &datacatalogpb.TagField_StringValue{StringValue: "Copied from tlc_yellow_trips_2018"},
			},
			"num_rows": {
				Kind: &datacatalogpb.TagField_DoubleValue{DoubleValue: 113496874},
			},
			"has_pii": {
				Kind: &datacatalogpb.TagField_BoolValue{BoolValue: false},
			},
			"pii_type": {
				Kind: &datacatalogpb.TagField_EnumValue_{
					EnumValue: &datacatalogpb.TagField_EnumValue{
						DisplayName: "NONE",
					},
				},
			},
		},
	}

	req := &datacatalogpb.CreateTagRequest{
		Parent: entryName,
		Tag:    tag,
	}
	return client.CreateTag(ctx, req)
}

// convertBigQueryResourceRepresentation converts a table identifier in standard sql form
// (project.datadata.table) into the representation used within data catalog.
func convertBigQueryResourceRepresentation(table string) (string, error) {
	parts := strings.Split(table, ".")
	if len(parts) != 3 {
		return "", fmt.Errorf("specified table string is not in expected project.dataset.table format: %s", table)
	}
	return fmt.Sprintf("//bigquery.googleapis.com/projects/%s/datasets/%s/tables/%s", parts[0], parts[1], parts[2]), nil
}

Java

Before trying this sample, follow the Java setup instructions in the Data Catalog quickstart using client libraries. For more information, see the Data Catalog Java API reference documentation.

import com.google.cloud.datacatalog.v1.CreateTagRequest;
import com.google.cloud.datacatalog.v1.CreateTagTemplateRequest;
import com.google.cloud.datacatalog.v1.DataCatalogClient;
import com.google.cloud.datacatalog.v1.Entry;
import com.google.cloud.datacatalog.v1.FieldType;
import com.google.cloud.datacatalog.v1.FieldType.EnumType;
import com.google.cloud.datacatalog.v1.FieldType.EnumType.EnumValue;
import com.google.cloud.datacatalog.v1.FieldType.PrimitiveType;
import com.google.cloud.datacatalog.v1.LocationName;
import com.google.cloud.datacatalog.v1.LookupEntryRequest;
import com.google.cloud.datacatalog.v1.Tag;
import com.google.cloud.datacatalog.v1.TagField;
import com.google.cloud.datacatalog.v1.TagTemplate;
import com.google.cloud.datacatalog.v1.TagTemplateField;
import java.io.IOException;

public class Quickstart {

  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project";
    String tagTemplateId = "my_tag_template";
    createTags(projectId, tagTemplateId);
  }

  public static void createTags(String projectId, String tagTemplateId) throws IOException {
    // Currently, Data Catalog stores metadata in the us-central1 region.
    String location = "us-central1";

    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    try (DataCatalogClient dataCatalogClient = DataCatalogClient.create()) {

      // -------------------------------
      // Create a Tag Template.
      // -------------------------------
      TagTemplateField sourceField =
          TagTemplateField.newBuilder()
              .setDisplayName("Source of data asset")
              .setType(FieldType.newBuilder().setPrimitiveType(PrimitiveType.STRING).build())
              .build();

      TagTemplateField numRowsField =
          TagTemplateField.newBuilder()
              .setDisplayName("Number of rows in data asset")
              .setType(FieldType.newBuilder().setPrimitiveType(PrimitiveType.DOUBLE).build())
              .build();

      TagTemplateField hasPiiField =
          TagTemplateField.newBuilder()
              .setDisplayName("Has PII")
              .setType(FieldType.newBuilder().setPrimitiveType(PrimitiveType.BOOL).build())
              .build();

      TagTemplateField piiTypeField =
          TagTemplateField.newBuilder()
              .setDisplayName("PII type")
              .setType(
                  FieldType.newBuilder()
                      .setEnumType(
                          EnumType.newBuilder()
                              .addAllowedValues(
                                  EnumValue.newBuilder().setDisplayName("EMAIL").build())
                              .addAllowedValues(
                                  EnumValue.newBuilder()
                                      .setDisplayName("SOCIAL SECURITY NUMBER")
                                      .build())
                              .addAllowedValues(
                                  EnumValue.newBuilder().setDisplayName("NONE").build())
                              .build())
                      .build())
              .build();

      TagTemplate tagTemplate =
          TagTemplate.newBuilder()
              .setDisplayName("Demo Tag Template")
              .putFields("source", sourceField)
              .putFields("num_rows", numRowsField)
              .putFields("has_pii", hasPiiField)
              .putFields("pii_type", piiTypeField)
              .build();

      CreateTagTemplateRequest createTagTemplateRequest =
          CreateTagTemplateRequest.newBuilder()
              .setParent(
                  LocationName.newBuilder()
                      .setProject(projectId)
                      .setLocation(location)
                      .build()
                      .toString())
              .setTagTemplateId(tagTemplateId)
              .setTagTemplate(tagTemplate)
              .build();

      // Create the Tag Template.
      tagTemplate = dataCatalogClient.createTagTemplate(createTagTemplateRequest);

      // -------------------------------
      // Lookup Data Catalog's Entry referring to the table.
      // -------------------------------
      String linkedResource =
          String.format(
              "//bigquery.googleapis.com/projects/%s/datasets/test_dataset/tables/test_table",
              projectId);
      LookupEntryRequest lookupEntryRequest =
          LookupEntryRequest.newBuilder().setLinkedResource(linkedResource).build();
      Entry tableEntry = dataCatalogClient.lookupEntry(lookupEntryRequest);

      // -------------------------------
      // Attach a Tag to the table.
      // -------------------------------
      TagField sourceValue =
          TagField.newBuilder().setStringValue("Copied from tlc_yellow_trips_2017").build();
      TagField numRowsValue = TagField.newBuilder().setDoubleValue(113496874).build();
      TagField hasPiiValue = TagField.newBuilder().setBoolValue(false).build();
      TagField piiTypeValue =
          TagField.newBuilder()
              .setEnumValue(TagField.EnumValue.newBuilder().setDisplayName("NONE").build())
              .build();

      Tag tag =
          Tag.newBuilder()
              .setTemplate(tagTemplate.getName())
              .putFields("source", sourceValue)
              .putFields("num_rows", numRowsValue)
              .putFields("has_pii", hasPiiValue)
              .putFields("pii_type", piiTypeValue)
              .build();

      CreateTagRequest createTagRequest =
          CreateTagRequest.newBuilder().setParent(tableEntry.getName()).setTag(tag).build();

      dataCatalogClient.createTag(createTagRequest);
      System.out.printf("Tag created successfully");
    }
  }
}

Node.js

Before trying this sample, follow the Node.js setup instructions in the Data Catalog quickstart using client libraries. For more information, see the Data Catalog Node.js API reference documentation.

// Import the Google Cloud client library and create a client.
const {DataCatalogClient} = require('@google-cloud/datacatalog').v1;
const datacatalog = new DataCatalogClient();

async function quickstart() {
  // Common fields.
  let request;
  let responses;

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my_project'; // Google Cloud Platform project
  // const datasetId = 'demo_dataset';
  // const tableId = 'trips';

  // Currently, Data Catalog stores metadata in the
  // us-central1 region.
  const location = 'us-central1';

  // Create Fields.
  const fieldSource = {
    displayName: 'Source of data asset',
    type: {
      primitiveType: 'STRING',
    },
  };

  const fieldNumRows = {
    displayName: 'Number of rows in data asset',
    type: {
      primitiveType: 'DOUBLE',
    },
  };

  const fieldHasPII = {
    displayName: 'Has PII',
    type: {
      primitiveType: 'BOOL',
    },
  };

  const fieldPIIType = {
    displayName: 'PII type',
    type: {
      enumType: {
        allowedValues: [
          {
            displayName: 'EMAIL',
          },
          {
            displayName: 'SOCIAL SECURITY NUMBER',
          },
          {
            displayName: 'NONE',
          },
        ],
      },
    },
  };

  // Create Tag Template.
  const tagTemplateId = 'demo_tag_template';

  const tagTemplate = {
    displayName: 'Demo Tag Template',
    fields: {
      source: fieldSource,
      num_rows: fieldNumRows,
      has_pii: fieldHasPII,
      pii_type: fieldPIIType,
    },
  };

  const tagTemplatePath = datacatalog.tagTemplatePath(
    projectId,
    location,
    tagTemplateId
  );

  // Delete any pre-existing Template with the same name.
  try {
    request = {
      name: tagTemplatePath,
      force: true,
    };
    await datacatalog.deleteTagTemplate(request);
    console.log(`Deleted template: ${tagTemplatePath}`);
  } catch (error) {
    console.log(`Cannot delete template: ${tagTemplatePath}`);
  }

  // Create the Tag Template request.
  const locationPath = datacatalog.locationPath(projectId, location);

  request = {
    parent: locationPath,
    tagTemplateId: tagTemplateId,
    tagTemplate: tagTemplate,
  };

  // Execute the request.
  responses = await datacatalog.createTagTemplate(request);
  const createdTagTemplate = responses[0];
  console.log(`Created template: ${createdTagTemplate.name}`);

  // Lookup Data Catalog's Entry referring to the table.
  responses = await datacatalog.lookupEntry({
    linkedResource:
      '//bigquery.googleapis.com/projects/' +
      `${projectId}/datasets/${datasetId}/tables/${tableId}`,
  });
  const entry = responses[0];
  console.log(`Entry name: ${entry.name}`);
  console.log(`Entry type: ${entry.type}`);
  console.log(`Linked resource: ${entry.linkedResource}`);

  // Attach a Tag to the table.
  const tag = {
    name: entry.name,
    template: createdTagTemplate.name,
    fields: {
      source: {
        stringValue: 'copied from tlc_yellow_trips_2017',
      },
      num_rows: {
        doubleValue: 113496874,
      },
      has_pii: {
        boolValue: false,
      },
      pii_type: {
        enumValue: {
          displayName: 'NONE',
        },
      },
    },
  };

  request = {
    parent: entry.name,
    tag: tag,
  };

  // Create the Tag.
  await datacatalog.createTag(request);
  console.log(`Tag created for entry: ${entry.name}`);
}
quickstart();

Python

Before trying this sample, follow the Python setup instructions in the Data Catalog quickstart using client libraries. For more information, see the Data Catalog Python API reference documentation.

# Import required modules.
from google.cloud import datacatalog_v1

# TODO: Set these values before running the sample.
# Google Cloud Platform project.
project_id = "my_project"
# Set dataset_id to the ID of existing dataset.
dataset_id = "demo_dataset"
# Set table_id to the ID of existing table.
table_id = "trips"
# Tag template to create.
tag_template_id = "example_tag_template"

# For all regions available, see:
# https://cloud.google.com/data-catalog/docs/concepts/regions
location = "us-central1"

# Use Application Default Credentials to create a new
# Data Catalog client. GOOGLE_APPLICATION_CREDENTIALS
# environment variable must be set with the location
# of a service account key file.
datacatalog_client = datacatalog_v1.DataCatalogClient()

# Create a Tag Template.
tag_template = datacatalog_v1.types.TagTemplate()

tag_template.display_name = "Demo Tag Template"

tag_template.fields["source"] = datacatalog_v1.types.TagTemplateField()
tag_template.fields["source"].display_name = "Source of data asset"
tag_template.fields[
    "source"
].type_.primitive_type = datacatalog_v1.types.FieldType.PrimitiveType.STRING

tag_template.fields["num_rows"] = datacatalog_v1.types.TagTemplateField()
tag_template.fields["num_rows"].display_name = "Number of rows in data asset"
tag_template.fields[
    "num_rows"
].type_.primitive_type = datacatalog_v1.types.FieldType.PrimitiveType.DOUBLE

tag_template.fields["has_pii"] = datacatalog_v1.types.TagTemplateField()
tag_template.fields["has_pii"].display_name = "Has PII"
tag_template.fields[
    "has_pii"
].type_.primitive_type = datacatalog_v1.types.FieldType.PrimitiveType.BOOL

tag_template.fields["pii_type"] = datacatalog_v1.types.TagTemplateField()
tag_template.fields["pii_type"].display_name = "PII type"

for display_name in ["EMAIL", "SOCIAL SECURITY NUMBER", "NONE"]:
    enum_value = datacatalog_v1.types.FieldType.EnumType.EnumValue(
        display_name=display_name
    )
    tag_template.fields["pii_type"].type_.enum_type.allowed_values.append(
        enum_value
    )

expected_template_name = datacatalog_v1.DataCatalogClient.tag_template_path(
    project_id, location, tag_template_id
)

# Create the Tag Template.
try:
    tag_template = datacatalog_client.create_tag_template(
        parent=f"projects/{project_id}/locations/{location}",
        tag_template_id=tag_template_id,
        tag_template=tag_template,
    )
    print(f"Created template: {tag_template.name}")
except OSError as e:
    print(f"Cannot create template: {expected_template_name}")
    print(f"{e}")

# Lookup Data Catalog's Entry referring to the table.
resource_name = (
    f"//bigquery.googleapis.com/projects/{project_id}"
    f"/datasets/{dataset_id}/tables/{table_id}"
)
table_entry = datacatalog_client.lookup_entry(
    request={"linked_resource": resource_name}
)

# Attach a Tag to the table.
tag = datacatalog_v1.types.Tag()

tag.template = tag_template.name
tag.name = "my_super_cool_tag"

tag.fields["source"] = datacatalog_v1.types.TagField()
tag.fields["source"].string_value = "Copied from tlc_yellow_trips_2018"

tag.fields["num_rows"] = datacatalog_v1.types.TagField()
tag.fields["num_rows"].double_value = 113496874

tag.fields["has_pii"] = datacatalog_v1.types.TagField()
tag.fields["has_pii"].bool_value = False

tag.fields["pii_type"] = datacatalog_v1.types.TagField()
tag.fields["pii_type"].enum_value.display_name = "NONE"

tag = datacatalog_client.create_tag(parent=table_entry.name, tag=tag)
print(f"Created tag: {tag.name}")

REST & CMD LINE

REST & CMD LINE

If you do not have access to Cloud Client libraries for your language or want to test the API using REST requests, see the following examples and refer to the Data Catalog REST API documentation.

1. Create a tag template.

Before using any of the request data, make the following replacements:

  • project-id: your GCP project ID

HTTP method and URL:

POST https://datacatalog.googleapis.com/v1/projects/project-id/locations/us-central1/tagTemplates?tagTemplateId=demo_tag_template

Request JSON body:


{
  "displayName":"Demo Tag Template",
  "fields":{
    "source":{
      "displayName":"Source of data asset",
      "isRequired": "true",
      "type":{
        "primitiveType":"STRING"
      }
    },
    "num_rows":{
      "displayName":"Number of rows in data asset",
      "isRequired": "false",
      "type":{
        "primitiveType":"DOUBLE"
      }
    },
    "has_pii":{
      "displayName":"Has PII",
      "isRequired": "false",
      "type":{
        "primitiveType":"BOOL"
      }
    },
    "pii_type":{
      "displayName":"PII type",
      "isRequired": "false",
      "type":{
        "enumType":{
          "allowedValues":[
            {
              "displayName":"EMAIL_ADDRESS"
            },
            {
              "displayName":"US_SOCIAL_SECURITY_NUMBER"
            },
            {
              "displayName":"NONE"
            }
          ]
        }
      }
    }
  }
}

To send your request, expand one of these options:

You should receive a JSON response similar to the following:

{
  "name":"projects/project-id/locations/us-central1/tagTemplates/demo_tag_template",
  "displayName":"Demo Tag Template",
  "fields":{
    "num_rows":{
      "displayName":"Number of rows in data asset",
      "isRequired": "false",
      "type":{
        "primitiveType":"DOUBLE"
      }
    },
    "has_pii":{
      "displayName":"Has PII",
      "isRequired": "false",
      "type":{
        "primitiveType":"BOOL"
      }
    },
    "pii_type":{
      "displayName":"PII type",
      "isRequired": "false",
      "type":{
        "enumType":{
          "allowedValues":[
            {
              "displayName":"EMAIL_ADDRESS"
            },
            {
              "displayName":"NONE"
            },
            {
              "displayName":"US_SOCIAL_SECURITY_NUMBER"
            }
          ]
        }
      }
    },
    "source":{
      "displayName":"Source of data asset",
      "isRequired":"true",
      "type":{
        "primitiveType":"STRING"
      }
    }
  }
}

2. Lookup the Data Catalog entry-id for your BigQuery table.

Before using any of the request data, make the following replacements:

  • project-id: GCP project ID

HTTP method and URL:

GET https://datacatalog.googleapis.com/v1/entries:lookup?linkedResource=//bigquery.googleapis.com/projects/project-id/datasets/demo_dataset/tables/trips

Request JSON body:

Request body is empty.

To send your request, expand one of these options:

You should receive a JSON response similar to the following:

{
  "name": "projects/project-id/locations/US/entryGroups/@bigquery/entries/entry-id",
  "type": "TABLE",
  "schema": {
    "columns": [
      {
        "type": "STRING",
        "description": "A code indicating the TPEP provider that provided the record. 1= ",
        "mode": "REQUIRED",
        "column": "vendor_id"
      },
      ...
    ]
  },
  "sourceSystemTimestamps": {
    "createTime": "2019-01-25T01:45:29.959Z",
    "updateTime": "2019-03-19T23:20:26.540Z"
  },
  "linkedResource": "//bigquery.googleapis.com/projects/project-id/datasets/demo_dataset/tables/trips",
  "bigqueryTableSpec": {
    "tableSourceType": "BIGQUERY_TABLE"
  }
}

3. Create a tag from the template and attach it to your BigQuery table.

Before using any of the request data, make the following replacements:

  • project-id: GCP project ID
  • entry-id: Data Catalog entry ID for the Demo Dataset trips table (returned in the lookup results in the previous step).

HTTP method and URL:

POST https://datacatalog.googleapis.com/v1/projects/project-id/locations/us-central1/entryGroups/@bigquery/entries/entry-id/tags

Request JSON body:

{
  "template":"projects/project-id/locations/us-central1/tagTemplates/demo_tag_template",
  "fields":{
    "source":{
      "stringValue":"Copied from tlc_yellow_trips_2017"
    },
    "num_rows":{
      "doubleValue":113496874
    },
    "has_pii":{
      "boolValue":false
    },
    "pii_type":{
      "enumValue":{
        "displayName":"NONE"
      }
    }
  }
}

To send your request, expand one of these options:

You should receive a JSON response similar to the following:

{
  "name":"projects/project-id/locations/US/entryGroups/@bigquery/entries/entry-id/tags/tag-id",
  "template":"projects/project-id/locations/us-central1/tagTemplates/demo_tag_template",
  "fields":{
    "pii_type":{
      "displayName":"PII type",
      "enumValue":{
        "displayName":"NONE"
      }
    },
    "has_pii":{
      "displayName":"Has PII",
      "boolValue":false
    },
    "source":{
      "displayName":"Source of data asset",
      "stringValue":"Copied from tlc_yellow_trips_2017"
    },
    "num_rows":{
      "displayName":"Number of rows in data asset",
      "doubleValue":113496874
    }
  },
  "templateDisplayName":"Demo Tag Template"
}
Caution: Renaming the table in BigQuery deletes all the tags attached to it and its columns.

Create an overview for your entry

Within console, you can use rich text to describe an entry in your Data Catalog project.

  1. To create an overview for the trips table, go to the Dataplex search page.

    Go to Dataplex

  2. In the search box, enter demo_dataset.

    In the search result, you see the demo_dataset dataset and the trips table.

  3. Click the trips table.

    A BigQuery table details page opens.

  4. Click Add overview and enter some text. You can additionally include images and rich formatted text.

  5. Click Save.

Add a data steward for your entry

Within console, you can add one or more data stewards to an entry in your Data Catalog project. A data steward for a data entry can be contacted to request more information about the data entry.

  1. To create an overview for the trips table, repeat the first 3 steps from the previous section.

  2. Click the Edit Steward icon and add in one or more email addresses.

    You can add a user with a non-Google email account.

  3. Click Save.

Clean up

To avoid incurring charges to your Google Cloud account for the resources used on this page, follow these steps.

Delete the project

The easiest way to eliminate billing is to delete the project that you created for the tutorial.

To delete the project:

  1. In the console, go to the Manage resources page.

    Go to Manage resources

  2. In the project list, select the project that you want to delete, and then click Delete.
  3. In the dialog, type the project ID, and then click Shut down to delete the project.

Delete the dataset

  1. If necessary, go to the BigQuery page.

    Go to BigQuery

  2. In the Explorer panel, search for the demo_dataset dataset you created.

  3. Click the Actions option and click Delete dataset.

  4. Confirm your delete action.

Delete the tag template

  1. Go to the Data Catalog > Templates page.

    Go to Data Catalog templates

  2. Select Demo Tag Template.

  3. In the row, click the Actions option and click Delete this template.

  4. Confirm your delete action.

What's next