Chilkat Online Tools

GetQueryResults Ruby Example

Athena

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("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)
    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.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")

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")
UpdateCount = jResp.IntOf("UpdateCount")
i = 0
count_i = jResp.SizeOfArray("ResultSet.ResultSetMetadata.ColumnInfo")
while i < count_i
    jResp.put_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
end
i = 0
count_i = jResp.SizeOfArray("ResultSet.Rows")
while i < count_i
    jResp.put_I(i)
    j = 0
    count_j = jResp.SizeOfArray("ResultSet.Rows[i].Data")
    while j < count_j
        jResp.put_J(j)
        VarCharValue = jResp.stringOf("ResultSet.Rows[i].Data[j].VarCharValue")
        j = j + 1
    end
    i = i + 1
end

# 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
# }