Match phrase query is similar to match query, except match phrase query evaluates the positions of tokens. A row meets the query condition only when the order and positions of the tokens in the row match the order and positions of the tokens that are contained in the keyword. If the tokenization method for the column that you want to query is fuzzy tokenization, match phrase query is performed at a lower latency than wildcard query.

Prerequisites

  • The OTSClient is initialized. For more information, see Initialization.
  • A data table is created. Data is written to the table.
  • A search index is created for the data table. For more information, see Create search indexes.

Parameters

ParameterDescription
field_nameThe name of the column you want to query.

Match phrase query applies to TEXT columns.

textThe keyword used to match the column values when you perform a phase query.

If the column to query is a TEXT column, the keyword is tokenized into multiple tokens based on the analyzer you set when you create the search index. By default, single-word tokenization is performed if you do not set the analyzer when you create the search index.

For example, if you query the phrase "this is", results such as "..., this is tablestore" and "this is a table" are returned. Query results such as "this table is ..."or "is this a table" are not returned.

queryThe query type. To use match phrase query, set this parameter to MatchPhraseQuery.
table_nameThe name of the base table.
index_nameThe name of the search index.
limitThe maximum number of rows that the current query returns.

To query just the number of matched rows without any detailed data, you can set limit to 0. In this case, Tablestore returns the number of matched rows without data from the table.

get_total_countSpecifies whether to return the total number of rows that match the query conditions. By default, this parameter is set to False, which indicates that the total number of rows that match the query conditions is not returned.

Query performance is affected when this parameter is set to True.

columns_to_getSpecifies whether to return all columns of each matched row.
  • If you set return_type to ColumnReturnType.SPECIFIED, you can use column_names to specify the columns to return.
  • If you set return_type to ColumnReturnType.ALL, all columns are returned.
  • If you set return_type to ColumnReturnType.NONE, only the primary key columns are returned.

Examples

Use match phrase query to query the rows whose t column values match the 'this is' phrase in sequence.

  • Perform match phrase query by using Tablestore SDK for Python V5.2.1 or later
    By default, if you use Tablestore SDK for Python V5.2.1 or later to perform a match phrase query, SearchResponse objects are returned. The following code provides a request sample:
    query = MatchPhraseQuery('t', 'this is')
search_response = client.search(
    table_name, index_name, 
    SearchQuery(query, limit=100, get_total_count=True), 
    ColumnsToGet(return_type=ColumnReturnType.ALL)
)
    You can use the following sample request to return results of the Tuple type: 
    query = MatchPhraseQuery('t', 'this is')
rows, next_token, total_count, is_all_succeed, agg_results, group_by_results = client.search(
    table_name, index_name, 
    SearchQuery(query, limit=100, get_total_count=True), 
    ColumnsToGet(return_type=ColumnReturnType.ALL)
).v1_response()
  • Perform match phrase query by using Tablestore SDK for Python of a version earlier than 5.2.1

    By default, if you use Tablestore SDK for Python of a version earlier than 5.2.1 to perform a match phrase query, results of the Tuple type are returned. The following code provides a request sample:

    query = MatchPhraseQuery('t', 'this is')
rows, next_token, total_count, is_all_succeed = client.search(
    table_name, index_name, 
    SearchQuery(query, limit=100, get_total_count=True), 
    ColumnsToGet(return_type=ColumnReturnType.ALL)
)