Chilkat Online Tools

GetQueryResults PureBasic Example

Athena

IncludeFile "CkJsonObject.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkRest.pb"
IncludeFile "CkAuthAws.pb"

Procedure ChilkatExample()

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

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    authAws.i = CkAuthAws::ckCreate()
    If authAws.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkAuthAws::setCkAccessKey(authAws, "AWS_ACCESS_KEY")
    CkAuthAws::setCkSecretKey(authAws, "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.)
    CkAuthAws::setCkRegion(authAws, "us-west-2")
    CkAuthAws::setCkServiceName(authAws, "athena")
    ; SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    CkRest::ckSetAuthAws(rest,authAws)

    ; URL: https://athena.us-west-2.amazonaws.com/
    ; Use the same region as specified above.
    success = CkRest::ckConnect(rest,"athena.us-west-2.amazonaws.com",443,1,1)
    If success <> 1
        Debug "ConnectFailReason: " + Str(CkRest::ckConnectFailReason(rest))
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        ProcedureReturn
    EndIf

    ; 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.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckUpdateInt(json,"MaxResults",123)
    CkJsonObject::ckUpdateString(json,"NextToken","string")
    CkJsonObject::ckUpdateString(json,"QueryExecutionId","string")

    ; The JSON request body created by the above code:

    ; {
    ;   "MaxResults": number,
    ;   "NextToken": "string",
    ;   "QueryExecutionId": "string"
    ; }

    CkRest::ckAddHeader(rest,"Content-Type","application/x-amz-json-1.1")
    CkRest::ckAddHeader(rest,"X-Amz-Target","AmazonAthena.GetQueryResults")

    sbRequestBody.i = CkStringBuilder::ckCreate()
    If sbRequestBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckEmitSb(json,sbRequestBody)
    sbResponseBody.i = CkStringBuilder::ckCreate()
    If sbResponseBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkRest::ckFullRequestSb(rest,"POST","/",sbRequestBody,sbResponseBody)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        CkJsonObject::ckDispose(json)
        CkStringBuilder::ckDispose(sbRequestBody)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    respStatusCode.i = CkRest::ckResponseStatusCode(rest)
    Debug "response status code = " + Str(respStatusCode)
    If respStatusCode <> 200
        Debug "Response Header:"
        Debug CkRest::ckResponseHeader(rest)
        Debug "Response Body:"
        Debug CkStringBuilder::ckGetAsString(sbResponseBody)
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        CkJsonObject::ckDispose(json)
        CkStringBuilder::ckDispose(sbRequestBody)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    jResp.i = CkJsonObject::ckCreate()
    If jResp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoadSb(jResp,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

    CaseSensitive.i
    CatalogName.s
    Label.s
    Name.s
    Nullable.s
    Precision.i
    Scale.i
    SchemaName.s
    TableName.s
    v_Type.s
    j.i
    count_j.i
    VarCharValue.s

    NextToken.s = CkJsonObject::ckStringOf(jResp,"NextToken")
    UpdateCount.i = CkJsonObject::ckIntOf(jResp,"UpdateCount")
    i.i = 0
    count_i.i = CkJsonObject::ckSizeOfArray(jResp,"ResultSet.ResultSetMetadata.ColumnInfo")
    While i < count_i
        CkJsonObject::setCkI(jResp, i)
        CaseSensitive = CkJsonObject::ckIntOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].CaseSensitive")
        CatalogName = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].CatalogName")
        Label = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].Label")
        Name = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].Name")
        Nullable = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].Nullable")
        Precision = CkJsonObject::ckIntOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].Precision")
        Scale = CkJsonObject::ckIntOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].Scale")
        SchemaName = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].SchemaName")
        TableName = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].TableName")
        v_Type = CkJsonObject::ckStringOf(jResp,"ResultSet.ResultSetMetadata.ColumnInfo[i].Type")
        i = i + 1
    Wend
    i = 0
    count_i = CkJsonObject::ckSizeOfArray(jResp,"ResultSet.Rows")
    While i < count_i
        CkJsonObject::setCkI(jResp, i)
        j = 0
        count_j = CkJsonObject::ckSizeOfArray(jResp,"ResultSet.Rows[i].Data")
        While j < count_j
            CkJsonObject::setCkJ(jResp, j)
            VarCharValue = CkJsonObject::ckStringOf(jResp,"ResultSet.Rows[i].Data[j].VarCharValue")
            j = j + 1
        Wend
        i = i + 1
    Wend

    ; 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
    ; }


    CkRest::ckDispose(rest)
    CkAuthAws::ckDispose(authAws)
    CkJsonObject::ckDispose(json)
    CkStringBuilder::ckDispose(sbRequestBody)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkJsonObject::ckDispose(jResp)


    ProcedureReturn
EndProcedure