Using TableRequest API to drop index
You can use TableRequest API to drop an index of a NoSQL table.
Execution of operations specified by TableRequest
class is asynchronous. These are potentially long-running operations.
TableResult is returned from TableRequest
operations and it encapsulates the state of the table. See Oracle
NoSQL Java SDK API Reference for more details on the TableRequest
class and its methods.
/* Drop the index acct_episodes*/
private static void dropIndex(NoSQLHandle handle) throws Exception {
String dropIndexDDL = "DROP INDEX acct_episodes ON " + tableName;
TableRequest treq = new TableRequest().setStatement(dropIndexDDL);
TableResult tres = handle.tableRequest(treq);
tres.waitForCompletion(handle, 60000, /* wait 60 sec */
1000); /* delay ms for poll */
System.out.println("Index acct_episodes on " + tableName + " is dropped");
}You can use the borneo.TableRequest class to drop a
table index. All calls to borneo.NoSQLHandle.table_request()
are asynchronous so it is necessary to check the result and call
borneo.TableResult.wait_for_completion() to wait for the
operation to complete. See Oracle NoSQL Python SDK API Reference
for more details on table_request and its methods.
#drop the index
def drop_index(handle):
statement = '''DROP INDEX acct_episodes ON stream_acct'''
request = TableRequest().set_statement(statement)
table_result = handle.do_table_request(request, 40000, 3000)
table_result.wait_for_completion(handle, 40000, 3000)
print('Index acct_episodes on the table stream_acct is dropped')
You can use the TableRequest class to drop a table
index. Execution of operations specified by TableRequest is
asynchronous. These are potentially long-running operations. This request is
used as the input of a Client.DoTableRequest() operation, which
returns a TableResult that can be used to poll until the table
reaches the desired state. See Oracle NoSQL Go SDK API Reference for
more details on the various methods of the TableRequest
class.
//drops an index from a table
func dropIndex(client *nosqldb.Client, err error, tableName string)(){
stmt := fmt.Sprintf("DROP INDEX acct_episodes ON %s",tableName)
tableReq := &nosqldb.TableRequest{
Statement: stmt,
}
tableRes, err := client.DoTableRequest(tableReq)
if err != nil {
fmt.Printf("cannot initiate DROP INDEX request: %v\n", err)
return
}
// The drop index request is asynchronous, wait for drop index to complete.
_, err = tableRes.WaitForCompletion(client, 60*time.Second, time.Second)
if err != nil {
fmt.Printf("Error finishing DROP INDEX request: %v\n", err)
return
}
fmt.Println("Dropped index acct_episodes on table ", tableName)
return
} You can use the tableDDL method to drop a table
index. This method is asynchronous and it returns a Promise of
TableResult. The TableResult is a plain
JavaScript object that contains the status of the DDL operation such as its
TableState, name, schema, and its TableLimits. For method details, see NoSQLClient class.
//drops an index
async function dropIndex(handle) {
const dropindDDL = `DROP INDEX acct_episodes ON ${TABLE_NAME}`;
let res = await handle.tableDDL(dropindDDL);
console.log('Index acct_episodes is dropped from table: ' + TABLE_NAME);
}You can use one of the methods ExecuteTableDDLAsync
or ExecuteTableDDLWithCompletionAsync to drop a table index.
Both the methods return Task<TableResult>.
TableResult instance contains status of DDL operation such
as TableState and table schema. See Oracle NoSQL Dotnet SDK API
Reference for more details on these methods.
private static async Task dropIndex(NoSQLClient client){
var sql = $@"DROP INDEX acct_episodes on {TableName}";
var tableResult = await client.ExecuteTableDDLAsync(sql);
// Wait for the operation completion
await tableResult.WaitForCompletionAsync();
Console.WriteLine(" Index acct_episodes is dropped from table Table {0}",
tableResult.TableName);
}