Chilkat Online Tools

GetQueryResults C# Example

Athena

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Rest rest = new Chilkat.Rest();
bool success;

Chilkat.AuthAws authAws = new Chilkat.AuthAws();
authAws.AccessKey = "AWS_ACCESS_KEY";
authAws.SecretKey = "AWS_SECRET_KEY";

// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = "us-west-2";
authAws.ServiceName = "athena";
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws);

// URL: https://athena.us-west-2.amazonaws.com/
// Use the same region as specified above.
success = rest.Connect("athena.us-west-2.amazonaws.com",443,true,true);
if (success != true) {
    Debug.WriteLine("ConnectFailReason: " + Convert.ToString(rest.ConnectFailReason));
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// The following code creates the JSON request body.
// The JSON created by this code is shown below.

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateInt("MaxResults",123);
json.UpdateString("NextToken","string");
json.UpdateString("QueryExecutionId","string");

// The JSON request body created by the above code:

// {
//   "MaxResults": number,
//   "NextToken": "string",
//   "QueryExecutionId": "string"
// }

rest.AddHeader("Content-Type","application/x-amz-json-1.1");
rest.AddHeader("X-Amz-Target","AmazonAthena.GetQueryResults");

Chilkat.StringBuilder sbRequestBody = new Chilkat.StringBuilder();
json.EmitSb(sbRequestBody);
Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

int respStatusCode = rest.ResponseStatusCode;
Debug.WriteLine("response status code = " + Convert.ToString(respStatusCode));
if (respStatusCode != 200) {
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(rest.ResponseHeader);
    Debug.WriteLine("Response Body:");
    Debug.WriteLine(sbResponseBody.GetAsString());
    return;
}

Chilkat.JsonObject jResp = new Chilkat.JsonObject();
jResp.LoadSb(sbResponseBody);

// The following code parses the JSON response.
// A sample JSON response is shown below the sample code.

// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

int CaseSensitive;
string CatalogName;
string Label;
string Name;
string Nullable;
int Precision;
int Scale;
string SchemaName;
string TableName;
string v_Type;
int j;
int count_j;
string VarCharValue;

string NextToken = jResp.StringOf("NextToken");
int UpdateCount = jResp.IntOf("UpdateCount");
int i = 0;
int count_i = jResp.SizeOfArray("ResultSet.ResultSetMetadata.ColumnInfo");
while (i < count_i) {
    jResp.I = i;
    CaseSensitive = jResp.IntOf("ResultSet.ResultSetMetadata.ColumnInfo[i].CaseSensitive");
    CatalogName = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].CatalogName");
    Label = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Label");
    Name = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Name");
    Nullable = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Nullable");
    Precision = jResp.IntOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Precision");
    Scale = jResp.IntOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Scale");
    SchemaName = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].SchemaName");
    TableName = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].TableName");
    v_Type = jResp.StringOf("ResultSet.ResultSetMetadata.ColumnInfo[i].Type");
    i = i + 1;
}

i = 0;
count_i = jResp.SizeOfArray("ResultSet.Rows");
while (i < count_i) {
    jResp.I = i;
    j = 0;
    count_j = jResp.SizeOfArray("ResultSet.Rows[i].Data");
    while (j < count_j) {
        jResp.J = j;
        VarCharValue = jResp.StringOf("ResultSet.Rows[i].Data[j].VarCharValue");
        j = j + 1;
    }

    i = i + 1;
}

// A sample JSON response body parsed by the above code:

// {
//   "NextToken": "string",
//   "ResultSet": {
//     "ResultSetMetadata": {
//       "ColumnInfo": [
//         {
//           "CaseSensitive": boolean,
//           "CatalogName": "string",
//           "Label": "string",
//           "Name": "string",
//           "Nullable": "string",
//           "Precision": number,
//           "Scale": number,
//           "SchemaName": "string",
//           "TableName": "string",
//           "Type": "string"
//         }
//       ]
//     },
//     "Rows": [
//       {
//         "Data": [
//           {
//             "VarCharValue": "string"
//           }
//         ]
//       }
//     ]
//   },
//   "UpdateCount": number
// }