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public FetchRequestAsync ( string connectionId, uint statementId, ulong offset, int frameMaxSize, RequestOptions options ) : Task |
||
| connectionId | string | |
| statementId | uint | |
| offset | ulong | |
| frameMaxSize | int | |
| options | RequestOptions | |
| 리턴 | Task |
|
public void QueryManyRowTest()
{
var client = new PhoenixClient(_credentials);
string connId = GenerateRandomConnId();
RequestOptions options = RequestOptions.GetGatewayDefaultOptions();
// In gateway mode, url format will be https://<cluster dns name>.azurehdinsight.net/hbasephoenix<N>/
// Requests sent to hbasephoenix0/ will be forwarded to PQS on workernode0
options.AlternativeEndpoint = "hbasephoenix0/";
string tableName = "Persons" + connId;
OpenConnectionResponse openConnResponse = null;
CreateStatementResponse createStatementResponse = null;
try
{
// Opening connection
pbc::MapField<string, string> info = new pbc::MapField<string, string>();
openConnResponse = client.OpenConnectionRequestAsync(connId, info, options).Result;
// Syncing connection
ConnectionProperties connProperties = new ConnectionProperties
{
HasAutoCommit = true,
AutoCommit = false,
HasReadOnly = true,
ReadOnly = false,
TransactionIsolation = 0,
Catalog = "",
Schema = "",
IsDirty = true
};
client.ConnectionSyncRequestAsync(connId, connProperties, options).Wait();
createStatementResponse = client.CreateStatementRequestAsync(connId, options).Result;
// Running query 1
string sql1 = "CREATE TABLE " + tableName + " (LastName varchar(255) PRIMARY KEY,FirstName varchar(255))";
client.PrepareAndExecuteRequestAsync(connId, sql1, createStatementResponse.StatementId, long.MaxValue, int.MaxValue, options).Wait();
// Commit statement 1
client.CommitRequestAsync(connId, options).Wait();
// Creating statement 2
string sql2 = "UPSERT INTO " + tableName + " VALUES (?,?)";
PrepareResponse prepareResponse = client.PrepareRequestAsync(connId, sql2, long.MaxValue, options).Result;
StatementHandle statementHandle = prepareResponse.Statement;
// Insert 300 rows
for (int i = 0; i < 300; i++)
{
pbc::RepeatedField<TypedValue> list = new pbc.RepeatedField<TypedValue>();
TypedValue v1 = new TypedValue
{
StringValue = "d" + i,
Type = Rep.String
};
TypedValue v2 = new TypedValue
{
StringValue = "x" + i,
Type = Rep.String
};
list.Add(v1);
list.Add(v2);
ExecuteResponse executeResponse = client.ExecuteRequestAsync(statementHandle, list, long.MaxValue, true, options).Result;
}
// Commit statement 2
client.CommitRequestAsync(connId, options).Wait();
// Running query 3
string sql3 = "select * from " + tableName;
ExecuteResponse execResponse3 = client.PrepareAndExecuteRequestAsync(connId, sql3, createStatementResponse.StatementId, long.MaxValue, int.MaxValue, options).Result;
pbc::RepeatedField<Row> rows = execResponse3.Results[0].FirstFrame.Rows;
for (int i = 0; i < rows.Count; i++)
{
Row row = rows[i];
Debug.WriteLine(row.Value[0].ScalarValue.StringValue + " " + row.Value[1].ScalarValue.StringValue);
}
// 100 is hard coded in server side as default firstframe size
// In order to get remaining rows, FetchRequestAsync is used
Assert.AreEqual(100, rows.Count);
// Fetch remaining rows, offset is not used, simply set to 0
// if FetchResponse.Frame.Done = true, that means all the rows fetched
FetchResponse fetchResponse = client.FetchRequestAsync(connId, createStatementResponse.StatementId, 0, int.MaxValue, options).Result;
Assert.AreEqual(200, fetchResponse.Frame.Rows.Count);
Assert.AreEqual(true, fetchResponse.Frame.Done);
// Running query 4
string sql4 = "DROP TABLE " + tableName;
client.PrepareAndExecuteRequestAsync(connId, sql4, createStatementResponse.StatementId, long.MaxValue, int.MaxValue, options).Wait();
// Commit statement 4
client.CommitRequestAsync(connId, options).Wait();
}
catch (Exception ex)
{
Assert.Fail(ex.Message);
}
finally
{
if (createStatementResponse != null)
{
client.CloseStatementRequestAsync(connId, createStatementResponse.StatementId, options).Wait();
createStatementResponse = null;
}
if (openConnResponse != null)
{
client.CloseConnectionRequestAsync(connId, options).Wait();
openConnResponse = null;
}
}
}