Chilkat Online Tools

DescribeStatement Objective-C Example

Amazon Redshift Data API

#import <CkoRest.h>
#import <CkoAuthAws.h>
#import <CkoJsonObject.h>
#import <CkoStringBuilder.h>
#import <NSString.h>

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

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

CkoAuthAws *authAws = [[CkoAuthAws alloc] init];
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];

// 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" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@%d",@"ConnectFailReason: ",[rest.ConnectFailReason intValue]);
    NSLog(@"%@",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

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"Id" value: @"string"];

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

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

[rest AddHeader: @"Content-Type" value: @"application/x-amz-json-1.1"];
[rest AddHeader: @"X-Amz-Target" value: @"RedshiftData.DescribeStatement"];

CkoStringBuilder *sbRequestBody = [[CkoStringBuilder alloc] init];
[json EmitSb: sbRequestBody];
CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestSb: @"POST" uriPath: @"/" requestBody: sbRequestBody responseBody: sbResponseBody];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int respStatusCode = [rest.ResponseStatusCode intValue];
NSLog(@"%@%d",@"response status code = ",respStatusCode);
if (respStatusCode != 200) {
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",rest.ResponseHeader);
    NSLog(@"%@",@"Response Body:");
    NSLog(@"%@",[sbResponseBody GetAsString]);
    return;
}

CkoJsonObject *jResp = [[CkoJsonObject alloc] init];
[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

NSString *name = 0;
NSString *value = 0;

NSString *ClusterIdentifier = [jResp StringOf: @"ClusterIdentifier"];
int CreatedAt = [[jResp IntOf: @"CreatedAt"] intValue];
NSString *Database = [jResp StringOf: @"Database"];
NSString *DbUser = [jResp StringOf: @"DbUser"];
int Duration = [[jResp IntOf: @"Duration"] intValue];
NSString *Error = [jResp StringOf: @"Error"];
int HasResultSet = [[jResp IntOf: @"HasResultSet"] intValue];
NSString *Id = [jResp StringOf: @"Id"];
NSString *QueryString = [jResp StringOf: @"QueryString"];
int RedshiftPid = [[jResp IntOf: @"RedshiftPid"] intValue];
int RedshiftQueryId = [[jResp IntOf: @"RedshiftQueryId"] intValue];
int ResultRows = [[jResp IntOf: @"ResultRows"] intValue];
int ResultSize = [[jResp IntOf: @"ResultSize"] intValue];
NSString *SecretArn = [jResp StringOf: @"SecretArn"];
NSString *Status = [jResp StringOf: @"Status"];
int UpdatedAt = [[jResp IntOf: @"UpdatedAt"] intValue];
int i = 0;
int count_i = [[jResp SizeOfArray: @"QueryParameters"] intValue];
while (i < count_i) {
    jResp.I = [NSNumber numberWithInt: i];
    name = [jResp StringOf: @"QueryParameters[i].name"];
    value = [jResp StringOf: @"QueryParameters[i].value"];
    i = i + 1;
}

i = 0;
count_i = [[jResp SizeOfArray: @"SubStatements"] intValue];
while (i < count_i) {
    jResp.I = [NSNumber numberWithInt: i];
    CreatedAt = [[jResp IntOf: @"SubStatements[i].CreatedAt"] intValue];
    Duration = [[jResp IntOf: @"SubStatements[i].Duration"] intValue];
    Error = [jResp StringOf: @"SubStatements[i].Error"];
    HasResultSet = [[jResp IntOf: @"SubStatements[i].HasResultSet"] intValue];
    Id = [jResp StringOf: @"SubStatements[i].Id"];
    QueryString = [jResp StringOf: @"SubStatements[i].QueryString"];
    RedshiftQueryId = [[jResp IntOf: @"SubStatements[i].RedshiftQueryId"] intValue];
    ResultRows = [[jResp IntOf: @"SubStatements[i].ResultRows"] intValue];
    ResultSize = [[jResp IntOf: @"SubStatements[i].ResultSize"] intValue];
    Status = [jResp StringOf: @"SubStatements[i].Status"];
    UpdatedAt = [[jResp IntOf: @"SubStatements[i].UpdatedAt"] intValue];
    i = i + 1;
}

// 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
// }