This query is similar to a term query. A terms query supports multiple terms. A row of data is returned if at least one of the keywords matches the field value. Terms queries can be used in the same manner as the IN operator in SQL statements.
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
Parameter | Description |
---|---|
query_type | The query type. To use terms query, set this parameter to TermsQuery. |
field_name | The name of the field used to match the query conditions. |
terms | The keywords used to match the field values when you perform a terms query. A row meets the query conditions when the value of the specified field exactly matches at least one keyword. |
table_name | The name of the base table. |
index_name | The name of the search index. |
limit | The 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_count | Specifies 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_get | Specifies whether to return all columns of each matched row. You can configure return_type and column_names for this parameter.
|
Examples
Use terms query to query the rows whose k column values match one of the following keywords: 'key000', 'key100', 'key888', 'key999', 'key908', and 'key1000'.
- Perform terms query by using Tablestore SDK for Python V5.2.1 or laterBy default, if you use Tablestore SDK for Python V5.2.1 or later to perform a terms query, SearchResponse objects are returned. The following code provides a request sample:
query = TermsQuery('k', ['key000', 'key100', 'key888', 'key999', 'key908', 'key1000']) 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 = TermsQuery('k', ['key000', 'key100', 'key888', 'key999', 'key908', 'key1000']) 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 terms 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 terms query, results of the Tuple type are returned. The following code provides a request sample:
query = TermsQuery('k', ['key000', 'key100', 'key888', 'key999', 'key908', 'key1000']) 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) )