Chilkat Online Tools

ListTables Ruby Example

Amazon Redshift Data API

require 'chilkat'

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

rest = Chilkat::CkRest.new()

authAws = Chilkat::CkAuthAws.new()
authAws.put_AccessKey("AWS_ACCESS_KEY")
authAws.put_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.put_Region("us-west-2")
authAws.put_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",443,true,true)
if (success != true)
    print "ConnectFailReason: " + rest.get_ConnectFailReason().to_s() + "\n";
    print rest.lastErrorText() + "\n";
    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 = Chilkat::CkJsonObject.new()
json.UpdateString("ClusterIdentifier","string")
json.UpdateString("ConnectedDatabase","string")
json.UpdateString("Database","string")
json.UpdateString("DbUser","string")
json.UpdateInt("MaxResults",123)
json.UpdateString("NextToken","string")
json.UpdateString("SchemaPattern","string")
json.UpdateString("SecretArn","string")
json.UpdateString("TablePattern","string")

# The JSON request body created by the above code:

# {
#   "ClusterIdentifier": "string",
#   "ConnectedDatabase": "string",
#   "Database": "string",
#   "DbUser": "string",
#   "MaxResults": number,
#   "NextToken": "string",
#   "SchemaPattern": "string",
#   "SecretArn": "string",
#   "TablePattern": "string"
# }

rest.AddHeader("Content-Type","application/x-amz-json-1.1")
rest.AddHeader("X-Amz-Target","RedshiftData.ListTables")

sbRequestBody = Chilkat::CkStringBuilder.new()
json.EmitSb(sbRequestBody)
sbResponseBody = Chilkat::CkStringBuilder.new()
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

respStatusCode = rest.get_ResponseStatusCode()
print "response status code = " + respStatusCode.to_s() + "\n";
if (respStatusCode != 200)
    print "Response Header:" + "\n";
    print rest.responseHeader() + "\n";
    print "Response Body:" + "\n";
    print sbResponseBody.getAsString() + "\n";
    exit
end

jResp = Chilkat::CkJsonObject.new()
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

NextToken = jResp.stringOf("NextToken")
i = 0
count_i = jResp.SizeOfArray("Tables")
while i < count_i
    jResp.put_I(i)
    name = jResp.stringOf("Tables[i].name")
    schema = jResp.stringOf("Tables[i].schema")
    v_type = jResp.stringOf("Tables[i].type")
    i = i + 1
end

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

# {
#   "NextToken": "string",
#   "Tables": [
#     {
#       "name": "string",
#       "schema": "string",
#       "type": "string"
#     }
#   ]
# }