Chilkat Online Tools

ListTableMetadata VB.NET Example

Athena

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

Dim rest As New Chilkat.Rest
Dim success As Boolean

Dim authAws As New Chilkat.AuthAws
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 = "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) Then
    Debug.WriteLine("ConnectFailReason: " & rest.ConnectFailReason)
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' 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

Dim json As New Chilkat.JsonObject
json.UpdateString("CatalogName","string")
json.UpdateString("DatabaseName","string")
json.UpdateString("Expression","string")
json.UpdateInt("MaxResults",123)
json.UpdateString("NextToken","string")

' The JSON request body created by the above code:

' {
'   "CatalogName": "string",
'   "DatabaseName": "string",
'   "Expression": "string",
'   "MaxResults": number,
'   "NextToken": "string"
' }

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

Dim sbRequestBody As New Chilkat.StringBuilder
json.EmitSb(sbRequestBody)
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If

Dim respStatusCode As Integer = rest.ResponseStatusCode
Debug.WriteLine("response status code = " & respStatusCode)
If (respStatusCode <> 200) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(rest.ResponseHeader)
    Debug.WriteLine("Response Body:")
    Debug.WriteLine(sbResponseBody.GetAsString())
    Exit Sub
End If


Dim jResp As New Chilkat.JsonObject
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



Dim CreateTime As Integer
Dim LastAccessTime As Integer
Dim Name As String
Dim v_String As String
Dim TableType As String
Dim j As Integer
Dim count_j As Integer
Dim Comment As String
Dim v_Type As String

Dim NextToken As String = jResp.StringOf("NextToken")
Dim i As Integer = 0
Dim count_i As Integer = jResp.SizeOfArray("TableMetadataList")
While i < count_i
    jResp.I = i
    CreateTime = jResp.IntOf("TableMetadataList[i].CreateTime")
    LastAccessTime = jResp.IntOf("TableMetadataList[i].LastAccessTime")
    Name = jResp.StringOf("TableMetadataList[i].Name")
    v_String = jResp.StringOf("TableMetadataList[i].Parameters.string")
    TableType = jResp.StringOf("TableMetadataList[i].TableType")
    j = 0
    count_j = jResp.SizeOfArray("TableMetadataList[i].Columns")
    While j < count_j
        jResp.J = j
        Comment = jResp.StringOf("TableMetadataList[i].Columns[j].Comment")
        Name = jResp.StringOf("TableMetadataList[i].Columns[j].Name")
        v_Type = jResp.StringOf("TableMetadataList[i].Columns[j].Type")
        j = j + 1
    End While
    j = 0
    count_j = jResp.SizeOfArray("TableMetadataList[i].PartitionKeys")
    While j < count_j
        jResp.J = j
        Comment = jResp.StringOf("TableMetadataList[i].PartitionKeys[j].Comment")
        Name = jResp.StringOf("TableMetadataList[i].PartitionKeys[j].Name")
        v_Type = jResp.StringOf("TableMetadataList[i].PartitionKeys[j].Type")
        j = j + 1
    End While
    i = i + 1
End While


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

' {
'   "NextToken": "string",
'   "TableMetadataList": [
'     {
'       "Columns": [
'         {
'           "Comment": "string",
'           "Name": "string",
'           "Type": "string"
'         }
'       ],
'       "CreateTime": number,
'       "LastAccessTime": number,
'       "Name": "string",
'       "Parameters": {
'         "string": "string"
'       },
'       "PartitionKeys": [
'         {
'           "Comment": "string",
'           "Name": "string",
'           "Type": "string"
'         }
'       ],
'       "TableType": "string"
'     }
'   ]
' }