Chilkat Online Tools

GetTableMetadata VBScript Example

Athena

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

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

set rest = CreateObject("Chilkat_9_5_0.Rest")

set authAws = CreateObject("Chilkat_9_5_0.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
success = 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",443,1,1)
If (success <> 1) Then
    outFile.WriteLine("ConnectFailReason: " & rest.ConnectFailReason)
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
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

set json = CreateObject("Chilkat_9_5_0.JsonObject")
success = json.UpdateString("CatalogName","string")
success = json.UpdateString("DatabaseName","string")
success = json.UpdateString("TableName","string")

' The JSON request body created by the above code:

' {
'   "CatalogName": "string",
'   "DatabaseName": "string",
'   "TableName": "string"
' }

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

set sbRequestBody = CreateObject("Chilkat_9_5_0.StringBuilder")
success = json.EmitSb(sbRequestBody)
set sbResponseBody = CreateObject("Chilkat_9_5_0.StringBuilder")
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success <> 1) Then
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

respStatusCode = rest.ResponseStatusCode
outFile.WriteLine("response status code = " & respStatusCode)
If (respStatusCode <> 200) Then
    outFile.WriteLine("Response Header:")
    outFile.WriteLine(rest.ResponseHeader)
    outFile.WriteLine("Response Body:")
    outFile.WriteLine(sbResponseBody.GetAsString())
    WScript.Quit
End If

set jResp = CreateObject("Chilkat_9_5_0.JsonObject")
success = 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

CreateTime = jResp.IntOf("TableMetadata.CreateTime")
LastAccessTime = jResp.IntOf("TableMetadata.LastAccessTime")
Name = jResp.StringOf("TableMetadata.Name")
v_String = jResp.StringOf("TableMetadata.Parameters.string")
TableType = jResp.StringOf("TableMetadata.TableType")
i = 0
count_i = jResp.SizeOfArray("TableMetadata.Columns")
Do While i < count_i
    jResp.I = i
    Comment = jResp.StringOf("TableMetadata.Columns[i].Comment")
    Name = jResp.StringOf("TableMetadata.Columns[i].Name")
    v_Type = jResp.StringOf("TableMetadata.Columns[i].Type")
    i = i + 1
Loop
i = 0
count_i = jResp.SizeOfArray("TableMetadata.PartitionKeys")
Do While i < count_i
    jResp.I = i
    Comment = jResp.StringOf("TableMetadata.PartitionKeys[i].Comment")
    Name = jResp.StringOf("TableMetadata.PartitionKeys[i].Name")
    v_Type = jResp.StringOf("TableMetadata.PartitionKeys[i].Type")
    i = i + 1
Loop

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

' {
'   "TableMetadata": {
'     "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"
'   }
' }

outFile.Close