Wildcard query

1. Go to the Index Management tab.

   1. Log on to the Table Store console.

   2. In the top navigation bar, select a resource group and a region.

   3. On the Overview page, click the instance name or click Instance Management in the Actions column.

   4. On the Instance Details tab, in the Data Table List tab, click the data table name or click Index Management in the Actions column.

2. On the Index Management tab, find the target Search Index and click Search in the Actions column.

3. In the Search dialog box, configure the query.

   1. By default, all columns are returned. To return specific columns, turn off Retrieve All Columns and enter the column names, separated by commas.

      Note

      By default, Table Store returns the primary key columns of the data table.

   2. Select a logical operator: And, Or, or Not.

      If you select And, the query returns data that meets all specified conditions. If you select Or, the query returns data that meets at least one of the specified conditions. If you select Not, the query returns data that does not meet the specified conditions.

   3. Select an index field and click Add.

   4. Set the query type for the index field to WildcardQuery and enter a value that contains wildcards.

   5. By default, sorting is disabled. To sort the results by a specific field, turn on Enable Sorting, add the sort field, and configure the sort order.

   6. By default, aggregation is disabled. To perform statistical aggregation on a specific field, turn on Enable Aggregation, add the field for aggregation, and configure the aggregation settings.

4. Click OK.

   The query results are displayed on the Index Management tab.

You can run the search command in a command-line tool (CLI) to query data by using a Search Index. For more information, see Search Index.

1. Run the search command to query data in the table by using the search_index Search Index, which returns all indexed columns.

   search -n search_index --return_all_indexed

2. Enter the query conditions as prompted. The following code provides an example:

   {
       "Offset": -1,
       "Limit": 10,
       "Collapse": null,
       "Sort": null,
       "GetTotalCount": true,
       "Token": null,
       "Query": {
           "Name": "WildcardQuery",
           "Query": {
               "FieldName": "col_keyword",
               "Value": "hang*u"
           }
       }
   }

You can perform a wildcard query using the Java SDK, Go SDK, Python SDK, Node.js SDK, .NET SDK, or PHP SDK. This section uses the Java SDK as an example.

The following sample code provides an example on how to query rows in which the value of the Col_Keyword column matches the "hang*u" pattern.

/**
 * Search the table for rows in which the value of the Col_Keyword column matches the "hang*u" pattern. 
 * @param client
 */
private static void wildcardQuery(SyncClient client) {
    SearchQuery searchQuery = new SearchQuery();
    WildcardQuery wildcardQuery = new WildcardQuery(); // Use WildcardQuery. 
    wildcardQuery.setFieldName("Col_Keyword");
    wildcardQuery.setValue("hang*u"); // Specify a string that contains one or more wildcard characters in wildcardQuery. 
    searchQuery.setQuery(wildcardQuery);
    //searchQuery.setGetTotalCount(true); // Specify that the total number of matched rows is returned. 

    SearchRequest searchRequest = new SearchRequest("<TABLE_NAME>", "<SEARCH_INDEX_NAME>", searchQuery);
    // You can configure the columnsToGet parameter to specify the columns to return or specify that all columns are returned. If you do not configure this parameter, only the primary key columns are returned. 
    //SearchRequest.ColumnsToGet columnsToGet = new SearchRequest.ColumnsToGet();
    //columnsToGet.setReturnAll(true); // Specify that all columns are returned. 
    //columnsToGet.setColumns(Arrays.asList("ColName1","ColName2")); // Specify the columns that you want to return. 
    //searchRequest.setColumnsToGet(columnsToGet);

    SearchResponse resp = client.search(searchRequest);
    //System.out.println("TotalCount: " + resp.getTotalCount()); // Display the total number of matched rows instead of the number of returned rows. 
    System.out.println("Row: " + resp.getRows());
}