Chilkat Online Tools

DescribeStatement delphiAx Example

Amazon Redshift Data API

var
rest: TChilkatRest;
success: Integer;
authAws: TChilkatAuthAws;
json: TChilkatJsonObject;
sbRequestBody: TChilkatStringBuilder;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
jResp: TChilkatJsonObject;
name: WideString;
value: WideString;
ClusterIdentifier: WideString;
CreatedAt: Integer;
Database: WideString;
DbUser: WideString;
Duration: Integer;
Error: WideString;
HasResultSet: Integer;
Id: WideString;
QueryString: WideString;
RedshiftPid: Integer;
RedshiftQueryId: Integer;
ResultRows: Integer;
ResultSize: Integer;
SecretArn: WideString;
Status: WideString;
UpdatedAt: Integer;
i: Integer;
count_i: Integer;

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

rest := TChilkatRest.Create(Self);

authAws := TChilkatAuthAws.Create(Self);
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 := 'redshift-data';
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws.ControlInterface);

// URL: https://redshift-data.us-west-2.amazonaws.com/
// Use the same region as specified above.
success := rest.Connect('redshift-data.us-west-2.amazonaws.com',443,1,1);
if (success <> 1) then
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(rest.ConnectFailReason));
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// 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

json := TChilkatJsonObject.Create(Self);
json.UpdateString('Id','string');

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

// {
//   "Id": "string"
// }

rest.AddHeader('Content-Type','application/x-amz-json-1.1');
rest.AddHeader('X-Amz-Target','RedshiftData.DescribeStatement');

sbRequestBody := TChilkatStringBuilder.Create(Self);
json.EmitSb(sbRequestBody.ControlInterface);
sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('POST','/',sbRequestBody.ControlInterface,sbResponseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;
respStatusCode := rest.ResponseStatusCode;
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(rest.ResponseHeader);
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(sbResponseBody.GetAsString());
    Exit;
  end;

jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.ControlInterface);

// 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

ClusterIdentifier := jResp.StringOf('ClusterIdentifier');
CreatedAt := jResp.IntOf('CreatedAt');
Database := jResp.StringOf('Database');
DbUser := jResp.StringOf('DbUser');
Duration := jResp.IntOf('Duration');
Error := jResp.StringOf('Error');
HasResultSet := jResp.IntOf('HasResultSet');
Id := jResp.StringOf('Id');
QueryString := jResp.StringOf('QueryString');
RedshiftPid := jResp.IntOf('RedshiftPid');
RedshiftQueryId := jResp.IntOf('RedshiftQueryId');
ResultRows := jResp.IntOf('ResultRows');
ResultSize := jResp.IntOf('ResultSize');
SecretArn := jResp.StringOf('SecretArn');
Status := jResp.StringOf('Status');
UpdatedAt := jResp.IntOf('UpdatedAt');
i := 0;
count_i := jResp.SizeOfArray('QueryParameters');
while i < count_i do
  begin
    jResp.I := i;
    name := jResp.StringOf('QueryParameters[i].name');
    value := jResp.StringOf('QueryParameters[i].value');
    i := i + 1;
  end;

i := 0;
count_i := jResp.SizeOfArray('SubStatements');
while i < count_i do
  begin
    jResp.I := i;
    CreatedAt := jResp.IntOf('SubStatements[i].CreatedAt');
    Duration := jResp.IntOf('SubStatements[i].Duration');
    Error := jResp.StringOf('SubStatements[i].Error');
    HasResultSet := jResp.IntOf('SubStatements[i].HasResultSet');
    Id := jResp.StringOf('SubStatements[i].Id');
    QueryString := jResp.StringOf('SubStatements[i].QueryString');
    RedshiftQueryId := jResp.IntOf('SubStatements[i].RedshiftQueryId');
    ResultRows := jResp.IntOf('SubStatements[i].ResultRows');
    ResultSize := jResp.IntOf('SubStatements[i].ResultSize');
    Status := jResp.StringOf('SubStatements[i].Status');
    UpdatedAt := jResp.IntOf('SubStatements[i].UpdatedAt');
    i := i + 1;
  end;

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

// {
//   "ClusterIdentifier": "string",
//   "CreatedAt": number,
//   "Database": "string",
//   "DbUser": "string",
//   "Duration": number,
//   "Error": "string",
//   "HasResultSet": boolean,
//   "Id": "string",
//   "QueryParameters": [
//     {
//       "name": "string",
//       "value": "string"
//     }
//   ],
//   "QueryString": "string",
//   "RedshiftPid": number,
//   "RedshiftQueryId": number,
//   "ResultRows": number,
//   "ResultSize": number,
//   "SecretArn": "string",
//   "Status": "string",
//   "SubStatements": [
//     {
//       "CreatedAt": number,
//       "Duration": number,
//       "Error": "string",
//       "HasResultSet": boolean,
//       "Id": "string",
//       "QueryString": "string",
//       "RedshiftQueryId": number,
//       "ResultRows": number,
//       "ResultSize": number,
//       "Status": "string",
//       "UpdatedAt": number
//     }
//   ],
//   "UpdatedAt": number
// }