Chilkat Online Tools

DescribeStatement delphiDll Example

Amazon Redshift Data API

var
rest: HCkRest;
success: Boolean;
authAws: HCkAuthAws;
json: HCkJsonObject;
sbRequestBody: HCkStringBuilder;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jResp: HCkJsonObject;
name: PWideChar;
value: PWideChar;
ClusterIdentifier: PWideChar;
CreatedAt: Integer;
Database: PWideChar;
DbUser: PWideChar;
Duration: Integer;
Error: PWideChar;
HasResultSet: Integer;
Id: PWideChar;
QueryString: PWideChar;
RedshiftPid: Integer;
RedshiftQueryId: Integer;
ResultRows: Integer;
ResultSize: Integer;
SecretArn: PWideChar;
Status: PWideChar;
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 := CkRest_Create();

authAws := CkAuthAws_Create();
CkAuthAws_putAccessKey(authAws,'AWS_ACCESS_KEY');
CkAuthAws_putSecretKey(authAws,'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.)
CkAuthAws_putRegion(authAws,'us-west-2');
CkAuthAws_putServiceName(authAws,'redshift-data');
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
CkRest_SetAuthAws(rest,authAws);

// URL: https://redshift-data.us-west-2.amazonaws.com/
// Use the same region as specified above.
success := CkRest_Connect(rest,'redshift-data.us-west-2.amazonaws.com',443,True,True);
if (success <> True) then
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(CkRest_getConnectFailReason(rest)));
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    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 := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'Id','string');

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

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

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

sbRequestBody := CkStringBuilder_Create();
CkJsonObject_EmitSb(json,sbRequestBody);
sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'POST','/',sbRequestBody,sbResponseBody);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;
respStatusCode := CkRest_getResponseStatusCode(rest);
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkRest__responseHeader(rest));
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponseBody));
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,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

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

i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'SubStatements');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    CreatedAt := CkJsonObject_IntOf(jResp,'SubStatements[i].CreatedAt');
    Duration := CkJsonObject_IntOf(jResp,'SubStatements[i].Duration');
    Error := CkJsonObject__stringOf(jResp,'SubStatements[i].Error');
    HasResultSet := CkJsonObject_IntOf(jResp,'SubStatements[i].HasResultSet');
    Id := CkJsonObject__stringOf(jResp,'SubStatements[i].Id');
    QueryString := CkJsonObject__stringOf(jResp,'SubStatements[i].QueryString');
    RedshiftQueryId := CkJsonObject_IntOf(jResp,'SubStatements[i].RedshiftQueryId');
    ResultRows := CkJsonObject_IntOf(jResp,'SubStatements[i].ResultRows');
    ResultSize := CkJsonObject_IntOf(jResp,'SubStatements[i].ResultSize');
    Status := CkJsonObject__stringOf(jResp,'SubStatements[i].Status');
    UpdatedAt := CkJsonObject_IntOf(jResp,'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
// }

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkJsonObject_Dispose(json);
CkStringBuilder_Dispose(sbRequestBody);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);