创建整数范围分区表

在现有数据集中创建新的整数范围分区表。

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

• 创建分区表

代码示例

C#

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 C# 设置说明进行操作。 如需了解详情，请参阅 BigQuery C# API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

using Google.Apis.Bigquery.v2.Data;
using Google.Cloud.BigQuery.V2;

public class BigQueryCreateTableRangePartitioned
{
    public BigQueryTable CreateTable(string projectId, string datasetId, string tableId)
    {
        BigQueryClient client = BigQueryClient.Create(projectId);
        var dataset = client.GetDataset(datasetId);

        // Note: The field must be a top- level, NULLABLE/REQUIRED field.
        // The only supported type is INTEGER/INT64.
        var partitioning = new RangePartitioning
        {
            Field = "integerField",
            Range = new RangePartitioning.RangeData
            {
                Start = 1,
                Interval = 2,
                End = 10
            }
        };
        var schema = new TableSchemaBuilder
        {
            { "integerField", BigQueryDbType.Int64 },
            { "stringField", BigQueryDbType.String },
            { "booleanField", BigQueryDbType.Bool },
            { "dateField", BigQueryDbType.Date }
        }.Build();

        var table = new Table
        {
            RangePartitioning = partitioning,
            Schema = schema
        };
        return dataset.CreateTable(tableId, table);
    }
}

Go

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Go 设置说明进行操作。 如需了解详情，请参阅 BigQuery Go API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

import (
	"context"
	"fmt"

	"cloud.google.com/go/bigquery"
)

// createTableRangeParitioned demonstrates creating a table and specifying a
// range partitioning configuration.
func createTableRangePartitioned(projectID, datasetID, tableID string) error {
	// projectID := "my-project-id"
	// datasetID := "mydatasetid"
	// tableID := "mytableid"
	ctx := context.Background()

	client, err := bigquery.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("bigquery.NewClient: %w", err)
	}
	defer client.Close()

	sampleSchema := bigquery.Schema{
		{Name: "full_name", Type: bigquery.StringFieldType},
		{Name: "city", Type: bigquery.StringFieldType},
		{Name: "zipcode", Type: bigquery.IntegerFieldType},
	}

	metadata := &bigquery.TableMetadata{
		RangePartitioning: &bigquery.RangePartitioning{
			Field: "zipcode",
			Range: &bigquery.RangePartitioningRange{
				Start:    0,
				End:      100000,
				Interval: 10,
			},
		},
		Schema: sampleSchema,
	}
	tableRef := client.Dataset(datasetID).Table(tableID)
	if err := tableRef.Create(ctx, metadata); err != nil {
		return err
	}
	return nil
}

Java

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Java 设置说明进行操作。 如需了解详情，请参阅 BigQuery Java API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.Field;
import com.google.cloud.bigquery.RangePartitioning;
import com.google.cloud.bigquery.Schema;
import com.google.cloud.bigquery.StandardSQLTypeName;
import com.google.cloud.bigquery.StandardTableDefinition;
import com.google.cloud.bigquery.TableId;
import com.google.cloud.bigquery.TableInfo;

// Sample to create a range partitioned table
public class CreateRangePartitionedTable {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String tableName = "MY_TABLE_NAME";
    Schema schema =
        Schema.of(
            Field.of("integerField", StandardSQLTypeName.INT64),
            Field.of("stringField", StandardSQLTypeName.STRING),
            Field.of("booleanField", StandardSQLTypeName.BOOL),
            Field.of("dateField", StandardSQLTypeName.DATE));
    createRangePartitionedTable(datasetName, tableName, schema);
  }

  public static void createRangePartitionedTable(
      String datasetName, String tableName, Schema schema) {
    try {
      // Initialize client that will be used to send requests. This client only needs to be created
      // once, and can be reused for multiple requests.
      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();

      TableId tableId = TableId.of(datasetName, tableName);

      // Note: The field must be a top- level, NULLABLE/REQUIRED field.
      // The only supported type is INTEGER/INT64
      RangePartitioning partitioning =
          RangePartitioning.newBuilder()
              .setField("integerField")
              .setRange(
                  RangePartitioning.Range.newBuilder()
                      .setStart(1L)
                      .setInterval(2L)
                      .setEnd(10L)
                      .build())
              .build();

      StandardTableDefinition tableDefinition =
          StandardTableDefinition.newBuilder()
              .setSchema(schema)
              .setRangePartitioning(partitioning)
              .build();
      TableInfo tableInfo = TableInfo.newBuilder(tableId, tableDefinition).build();

      bigquery.create(tableInfo);
      System.out.println("Range partitioned table created successfully");
    } catch (BigQueryException e) {
      System.out.println("Range partitioned table was not created. \n" + e.toString());
    }
  }
}

Node.js

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Node.js 设置说明进行操作。 如需了解详情，请参阅 BigQuery Node.js API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

// Import the Google Cloud client library
const {BigQuery} = require('@google-cloud/bigquery');
const bigquery = new BigQuery();

async function createTableRangePartitioned() {
  // Creates a new integer range partitioned table named "my_table"
  // in "my_dataset".

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const datasetId = "my_dataset";
  // const tableId = "my_table";

  const schema = [
    {name: 'fullName', type: 'STRING'},
    {name: 'city', type: 'STRING'},
    {name: 'zipcode', type: 'INTEGER'},
  ];

  // To use integer range partitioning, select a top-level REQUIRED or
  // NULLABLE column with INTEGER / INT64 data type. Values that are
  // outside of the range of the table will go into the UNPARTITIONED
  // partition. Null values will be in the NULL partition.
  const rangePartition = {
    field: 'zipcode',
    range: {
      start: 0,
      end: 100000,
      interval: 10,
    },
  };

  // For all options, see https://cloud.google.com/bigquery/docs/reference/v2/tables#resource
  const options = {
    schema: schema,
    rangePartitioning: rangePartition,
  };

  // Create a new table in the dataset
  const [table] = await bigquery
    .dataset(datasetId)
    .createTable(tableId, options);

  console.log(`Table ${table.id} created with integer range partitioning: `);
  console.log(table.metadata.rangePartitioning);
}

Python

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Python 设置说明进行操作。 如需了解详情，请参阅 BigQuery Python API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

from google.cloud import bigquery

# Construct a BigQuery client object.
client = bigquery.Client()

# TODO(developer): Set table_id to the ID of the table to create.
# table_id = "your-project.your_dataset.your_table_name"

schema = [
    bigquery.SchemaField("full_name", "STRING"),
    bigquery.SchemaField("city", "STRING"),
    bigquery.SchemaField("zipcode", "INTEGER"),
]

table = bigquery.Table(table_id, schema=schema)
table.range_partitioning = bigquery.RangePartitioning(
    # To use integer range partitioning, select a top-level REQUIRED /
    # NULLABLE column with INTEGER / INT64 data type.
    field="zipcode",
    range_=bigquery.PartitionRange(start=0, end=100000, interval=10),
)
table = client.create_table(table)  # Make an API request.
print(
    "Created table {}.{}.{}".format(table.project, table.dataset_id, table.table_id)
)

Terraform

如需了解如何应用或移除 Terraform 配置，请参阅基本 Terraform 命令。 如需了解详情，请参阅 Terraform 提供程序参考文档。

resource "google_bigquery_dataset" "default" {
  dataset_id                      = "mydataset"
  default_partition_expiration_ms = 2592000000  # 30 days
  default_table_expiration_ms     = 31536000000 # 365 days
  description                     = "dataset description"
  location                        = "US"
  max_time_travel_hours           = 96 # 4 days

  labels = {
    billing_group = "accounting",
    pii           = "sensitive"
  }
}

resource "google_bigquery_table" "default" {
  dataset_id          = google_bigquery_dataset.default.dataset_id
  table_id            = "mytable"
  deletion_protection = false # set to "true" in production

  range_partitioning {
    field = "ID"
    range {
      start    = 0
      end      = 1000
      interval = 10
    }
  }
  require_partition_filter = true

  schema = <<EOF
[
  {
    "name": "ID",
    "type": "INT64",
    "description": "Item ID"
  },
  {
    "name": "Item",
    "type": "STRING",
    "mode": "NULLABLE"
  }
]
EOF

}

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。