Tablestore:Perform batch data operations

Notes

• If the server detects parameter errors in any operation, it throws a parameter error exception and none of the operations in the request are executed.

• A single batch update operation supports a maximum of 200 rows, and the total data size of all rows cannot exceed 4 MB.

Prerequisites

Initialize a Tablestore client

Method

batchWriteRow: function batchWriteRow(params, callback)

Code examples

The following example inserts a row into the test_table table by using the batch operation method.

var table = {
    tableName: 'test_table',
    rows: [
        {
            type: 'PUT',
            // The condition for the write operation. 
            // TableStore.RowExistenceExpectation.IGNORE specifies that the row is written regardless of whether it already exists.
            condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
            primaryKey: [{ 'id': 'row1' }]
        }
    ]
};
var params = {
    tables: [table]
};

// Call the batchWriteRow method to perform the batch operation.
client.batchWriteRow(params, function (err, data) {
    if (err) {
        console.log('Batch write row failed with error: %s', err);
        return;
    }

    // Process the response.
    console.log('RequestId: %s', data.RequestId);
    data.tables.forEach(function (item) {
        if (!item.isOk) {
            console.log('Table name: %s. Error message: %s', item.tableName, item.errorMessage);
        }
    });
});

The following examples show different types of data operations.

• PutRowChange: Writes a row.

  var table = {
      tableName: 'test_table',
      rows: [
          {
              type: 'PUT',
              // Specify a condition for the write operation. TableStore.RowExistenceExpectation.IGNORE specifies not to check for row existence.
              condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
              primaryKey: [{ 'id': 'row1' }]
          }
      ]
  };

  You can also add attribute columns when writing a row.

  var table = {
      tableName: 'test_table',
      rows: [
          {
              type: 'PUT',
              // Specify a condition for the write operation. TableStore.RowExistenceExpectation.IGNORE specifies not to check for row existence.
              condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
              primaryKey: [{ 'id': 'row1' }],
              attributeColumns: [
                  // Add an attribute column.
                  { 'col1': 'val1' }, 
                  // Add an attribute column with a custom data version number.
                  { 'col2': 'val2', 'timestamp': Date.now() }
              ]
          }
      ]
  };

• UpdateRowChange: Updates a row. You can modify attribute column values, add attribute columns, or delete a specific version or all versions of an attribute column.

  var table = {
      tableName: 'test_table',
      rows: [
          {
              type: 'UPDATE',
              // Specify a condition for the update operation. TableStore.RowExistenceExpectation.IGNORE specifies not to check for row existence.
              condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
              primaryKey: [{ 'id': 'row1' }],
              attributeColumns: [{ 'PUT': [{ 'col1': 'changed_val1' }] }],
          }
      ]
  };

  You can also add or delete attribute columns when updating a row.

  var table = {
      tableName: 'test_table',
      rows: [
          {
              type: 'UPDATE',
              // Specify a condition for the update operation. TableStore.RowExistenceExpectation.IGNORE specifies not to check for row existence.
              condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
              primaryKey: [{ 'id': 'row1' }],
              attributeColumns: [
                  {
                      'PUT':
                          [
                              // Add an attribute column.
                              { 'col3': 'val3' },
                              // Add an attribute column with a custom data version number.
                              { 'col4': 'val4', 'timestamp': Date.now() }
                          ]
                  },
                  {   // Delete an attribute column.
                      'DELETE_ALL':
                          ['col2']
                  }
              ],
          }
      ]
  };

• DeleteRowChange: Deletes a row.

  var table = {
      tableName: 'test_table',
      rows: [
          {
              type: 'DELETE',
              // Specify a condition for the delete operation. TableStore.RowExistenceExpectation.IGNORE specifies not to check for row existence.
              condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
              primaryKey: [{ 'id': 'row1' }]
          }
      ]
  };

References

• Developer FAQ

• Conditional update

• Atomic counter