Use Tablestore SDK for Node.js to delete a single row or multiple rows of data at the same time - Tablestore

Tablestore provides the DeleteRow operation that allows you to delete a single row of data and the BatchWriteRow operation that allows you to delete multiple rows of data at a time.

Usage notes

The data that you delete cannot be restored. Proceed with caution.

Prerequisites

An OTSClient instance is initialized. For more information, see Initialize an OTSClient instance.
A data table is created and data is written to the data table. For more information, see Create a data table and Write data.

Delete a single row of data

You can call the DeleteRow operation to delete a single row of data. If the row that you want to delete does not exist, the table remains unchanged.

API operation

/**
 * Delete a single row of data. 
 */
deleteRow(params, callback)

Parameters

Parameter	Required	Description
tableName	Yes	The name of the data table.
primaryKey	Yes	The primary key of the row. The value of this parameter consists of the name, type, and value of each primary key column. Important The number and types of primary key columns that you specify must be the same as the actual number and types of primary key columns in the table.
condition	Yes	The condition that must be met to perform the operation. You can specify a row existence condition or a condition based on column values. For more information, see Configure conditional update.

Sample code

The following sample code provides an example on how to delete a row from a data table:

var TableStore = require('../index.js');
var Long = TableStore.Long;
var client = require('./client');

var params = {
    tableName: "sampleTable",
    condition: new TableStore.Condition(TableStore.RowExistenceExpectation.IGNORE, null),
    primaryKey: [{ 'gid': Long.fromNumber(8) }, { 'uid': Long.fromNumber(80) }]
};

client.deleteRow(params, function (err, data) {
    if (err) {
        console.log('error:', err);
        return;
    }

    console.log('success:', data);
});

To view the detailed sample code, visit DeleteRow@GitHub.

Delete multiple rows of data at the same time

Select a suitable method based on your business requirements to query the primary key information about the data that you want to delete.
- To delete data whose primary key values are within a specific range, call the GetRange operation to query the data and obtain the primary key information about the data. For more information, see Read data whose primary key values are within a specific range.
- To delete data that meets specific conditions from a data table for which a search index is created, use the search index to query the data and obtain the primary key information about the data. For more information, see Basic query.
- To delete all data from a data table, we recommend that you delete the data table and create a data table that has the same configurations.
  You can also call the GetRange operation and set the start primary key to INF_MIN and the end primary key to INF_MAX to scan all data in the table. This way, you can obtain the primary key information about all data in the table. However, this consumes a large amount of computing resources. Proceed with caution.
Call the BatchWriteRow operation to delete multiple rows of data at the same time based on the primary key information about the rows. For more information, see Write multiple rows of data at the same time.

References

Time to live (TTL) specifies the retention period of data. You can configure TTL for a data table to automatically delete expired data. For more information, see Data versions and TTL.