Chilkat Online Tools

DescribeTable VBScript Example

Amazon Redshift Data API

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 = "redshift-data"
' SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
success = 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",443,1,1)
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("ClusterIdentifier","string")
success = json.UpdateString("ConnectedDatabase","string")
success = json.UpdateString("Database","string")
success = json.UpdateString("DbUser","string")
success = json.UpdateInt("MaxResults",123)
success = json.UpdateString("NextToken","string")
success = json.UpdateString("Schema","string")
success = json.UpdateString("SecretArn","string")
success = json.UpdateString("Table","string")

' The JSON request body created by the above code:

' {
'   "ClusterIdentifier": "string",
'   "ConnectedDatabase": "string",
'   "Database": "string",
'   "DbUser": "string",
'   "MaxResults": number,
'   "NextToken": "string",
'   "Schema": "string",
'   "SecretArn": "string",
'   "Table": "string"
' }

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

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

NextToken = jResp.StringOf("NextToken")
TableName = jResp.StringOf("TableName")
i = 0
count_i = jResp.SizeOfArray("ColumnList")
Do While i < count_i
    jResp.I = i
    columnDefault = jResp.StringOf("ColumnList[i].columnDefault")
    isCaseSensitive = jResp.IntOf("ColumnList[i].isCaseSensitive")
    isCurrency = jResp.IntOf("ColumnList[i].isCurrency")
    isSigned = jResp.IntOf("ColumnList[i].isSigned")
    label = jResp.StringOf("ColumnList[i].label")
    length = jResp.IntOf("ColumnList[i].length")
    name = jResp.StringOf("ColumnList[i].name")
    nullable = jResp.IntOf("ColumnList[i].nullable")
    precision = jResp.IntOf("ColumnList[i].precision")
    scale = jResp.IntOf("ColumnList[i].scale")
    schemaName = jResp.StringOf("ColumnList[i].schemaName")
    tableName = jResp.StringOf("ColumnList[i].tableName")
    typeName = jResp.StringOf("ColumnList[i].typeName")
    i = i + 1
Loop

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

' {
'   "ColumnList": [
'     {
'       "columnDefault": "string",
'       "isCaseSensitive": boolean,
'       "isCurrency": boolean,
'       "isSigned": boolean,
'       "label": "string",
'       "length": number,
'       "name": "string",
'       "nullable": number,
'       "precision": number,
'       "scale": number,
'       "schemaName": "string",
'       "tableName": "string",
'       "typeName": "string"
'     }
'   ],
'   "NextToken": "string",
'   "TableName": "string"
' }

outFile.Close