SqlServer

22.2.0

SqlNotebook.psm1

                                # Copyright (c) Microsoft Corporation.

# Licensed under the MIT license.

Set-StrictMode -Version Latest

function Invoke-SqlNotebook {

    [CmdletBinding(DefaultParameterSetName="ByConnectionParameters")]

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUsePSCredentialType", "Username", Justification="Intentionally allowing User/Password, in addition to a PSCredential parameter.")]

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingPlainTextForPassword", "Password", Justification="Intentionally allowing User/Password, in addition to a PSCredential parameter.")]

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingUsernameAndPasswordParams", "", Justification="Intentionally allowing User/Password, in addition to a PSCredential parameter.")]

    # Parameters

    param(

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')]$ServerInstance,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')]$Database,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][ValidateNotNullorEmpty()]$Username,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][ValidateNotNullorEmpty()]$Password,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionString')][ValidateNotNullorEmpty()]$ConnectionString,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][ValidateNotNullorEmpty()][PSCredential]$Credential,

        [Parameter(Mandatory = $true, ParameterSetName='ByInputFile')]

        [Parameter(ParameterSetName = 'ByConnectionParameters')]

        [Parameter(ParameterSetName = 'ByConnectionString')]$InputFile,

        [Parameter(Mandatory = $true, ParameterSetName='ByInputObject')]

        [Parameter(ParameterSetName = 'ByConnectionParameters')]

        [Parameter(ParameterSetName = 'ByConnectionString')]$InputObject,

        [Parameter(Mandatory = $false)][ValidateNotNullorEmpty()]$OutputFile,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][ValidateNotNullorEmpty()][PSObject]$AccessToken,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][Switch]$TrustServerCertificate,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][ValidateSet("Mandatory", "Optional", "Strict")][string]$Encrypt,

        [Parameter(Mandatory = $false, ParameterSetName = 'ByConnectionParameters')][ValidateNotNull()][string]$HostNameInCertificate,

        [Switch]$Force

    )

    #Checks to see if OutputFile is given

    #If it is, checks to see if extension is there

    function getOutputFile($inputFile,$outputFile) {

        if($outputFile) {

            $extn = [IO.Path]::GetExtension($outputFile)

            if ($extn.Length -eq 0) {

                $outputFile = ($outputFile + ".ipynb")

            }

            $outputFile

        }

        else {

            #If User does not define Output it will use the inputFile file location

            $fileinfo = Get-Item $inputFile

            # Create an output file based on the file path of input and name

            Join-Path $fileinfo.DirectoryName ($fileinfo.BaseName + "_out" + $fileinfo.Extension)

        }

    }

    #Validates InputFile and Converts InputFile to Json Object

    function getFileContents($inputfile) {

        if (-not (Test-Path -Path $inputfile)) {

            Throw New-Object System.IO.FileNotFoundException ($inputfile + " does not exist")

        }

        $fileItem = Get-Item $inputfile

        #Checking if file is a python notebook

        if ($fileItem.Extension -ne ".ipynb") {

            Throw New-Object System.FormatException "Only ipynb files are supported"

        }

        $fileContent = Get-Content $inputfile

        try {

            $fileContentJson = ($fileContent | ConvertFrom-Json)

        }

        catch {

            Throw New-Object System.FormatException "Malformed Json file"

        }

        $fileContentJson

    }

    #Validate SQL Kernel Notebook

    function validateKernelType($fileContentJson) {

        if ($fileContentJson.metadata.kernelspec.name -ne "SQL") {

            Throw New-Object System.NotSupportedException "Kernel type '$($fileContentJson.metadata.kernelspec.name)' not supported."

        }

    }

    #Validate non-existing output file

    #If file exists and $throwifexists, an exception is thrown.

    function validateExistingOutputFile($outputfile, $throwifexists) {

        if ($outputfile -and (Test-Path $outputfile) -and $throwifexists) {

            Throw New-Object System.IO.IOException "The file '$($outputfile)' already exists. Please, specify -Force to overwrite it."

        }

    }

    #Parsing Notebook Data to Notebook Output

    function ParseTableToNotebookOutput {

        param (

            [System.Data.DataTable]

            $DataTable,

            [int]

            $CellExecutionCount

        )

        $TableHTMLText = "<table>"

        $TableSchemaFeilds = @()

        $TableHTMLText += "<tr>"

        foreach ($ColumnName in $DataTable.Columns) {

            $TableSchemaFeilds += @(@{name = $ColumnName.toString() })

            $TableHTMLText += "<th>" + $ColumnName.toString() + "</th>"

        }

        $TableHTMLText += "</tr>"

        $TableSchema = @{ }

        $TableSchema["fields"] = $TableSchemaFeilds

        $TableDataRows = @()

        foreach ($Row in $DataTable) {

            $TableDataRow = [ordered]@{ }

            $TableHTMLText += "<tr>"

            $i = 0

            foreach ($Cell in $Row.ItemArray) {

                $TableDataRow[$i.ToString()] = $Cell.toString()

                $TableHTMLText += "<td>" + $Cell.toString() + "</td>"

                $i++

            }

            $TableHTMLText += "</tr>"

            $TableDataRows += $TableDataRow

        }

        $TableDataResource = @{ }

        $TableDataResource["schema"] = $TableSchema

        $TableDataResource["data"] = $TableDataRows

        $TableData = @{ }

        $TableData["application/vnd.dataresource+json"] = $TableDataResource

        $TableData["text/html"] = $TableHTMLText

        $TableOutput = @{ }

        $TableOutput["output_type"] = "execute_result"

        $TableOutput["data"] = $TableData

        $TableOutput["metadata"] = @{ }

        $TableOutput["execution_count"] = $CellExecutionCount

        return $TableOutput

    }

    #Parsing the Error Messages to Notebook Output

    function ParseQueryErrorToNotebookOutput {

        param (

            $QueryError

        )

        <#

        Following the current syntax of errors in T-SQL notebooks from ADS

        #>

        $ErrorString = "Msg " + $QueryError.Exception.InnerException.Number +

        ", Level " + $QueryError.Exception.InnerException.Class +

        ", State " + $QueryError.Exception.InnerException.State +

        ", Line " + $QueryError.Exception.InnerException.LineNumber +

        "`r`n" + $QueryError.Exception.Message

        $ErrorOutput = @{ }

        $ErrorOutput["output_type"] = "error"

        $ErrorOutput["traceback"] = @()

        $ErrorOutput["evalue"] = $ErrorString

        return $ErrorOutput

    }

    #Parsing Messages to Notebook Output

    function ParseStringToNotebookOutput {

        param (

            [System.String]

            $InputString

        )

        <#

        Parsing the string to notebook cell output.

        It's the standard Jupyter Syntax

        #>

        $StringOutputData = @{ }

        $StringOutputData["text/html"] = $InputString

        $StringOutput = @{ }

        $StringOutput["output_type"] = "display_data"

        $StringOutput["data"] = $StringOutputData

        $StringOutput["metadata"] = @{ }

        return $StringOutput

    }

    #Start of Script

    #Checks to see if InputFile or InputObject was entered

    #Checks to InputFile Type and initializes OutputFile

    if ($InputFile -is [System.String]) {

        $fileInformation = getFileContents($InputFile)

        $fileContent = $fileInformation[0]

        $OutputFile = getOutputFile $InputFile $OutputFile

    } elseif ($InputFile -is [System.IO.FileInfo]) {

        $fileInformation = getFileContents($InputFile.FullName)

        $fileContent = $fileInformation[0]

        $OutputFile = getOutputFile $InputFile $OutputFile

    } else {

        $fileContent = $InputObject

    }

    #Checks InputObject and converts that to appropriate Json object

    if ($InputObject -is [System.String]) {

        $fileContentJson = ($InputObject | ConvertFrom-Json)

        $fileContent = $fileContentJson[0]

    }

    #Validates only SQL Notebooks

    validateKernelType $fileContent

    #Validate that $OutputFile does not exist, or, if it exists a -Force was passed in.

    validateExistingOutputFile $OutputFile (-not $Force)

    #Setting params for Invoke-Sqlcmd

    $DatabaseQueryHashTable = @{ }

    #Checks to see if User entered ConnectionString or individual parameters

    if ($ConnectionString) {

        $DatabaseQueryHashTable["ConnectionString"] = $ConnectionString

    } else {

        if ($ServerInstance) {

            $DatabaseQueryHashTable["ServerInstance"] = $ServerInstance

        }

        if ($Database) {

            $DatabaseQueryHashTable["Database"] = $Database

        }

        #Checks to see if User entered AccessToken, Credential, or individual parameters

        if ($AccessToken) {

            # Currently, Invoke-Sqlcmd only supports an -AccessToken of type [string]

            if ($AccessToken -is [string]) {

                $DatabaseQueryHashTable["AccessToken"] = $AccessToken

            } else {

                # Assume $AccessToken has a 'Token' member that is a string

                $DatabaseQueryHashTable["AccessToken"] = $AccessToken.Token

            }

        } else {

            if ($Credential) {

                $DatabaseQueryHashTable["Credential"] = $Credential

            } else {

                if ($Username) {

                    $DatabaseQueryHashTable["Username"] = $Username

                }

                if ($Password) {

                    $DatabaseQueryHashTable["Password"] = $Password

                }

            }

        }

        if ($Encrypt) {

            $DatabaseQueryHashTable["Encrypt"] = $Encrypt

        }

        if ($TrustServerCertificate) {

            $DatabaseQueryHashTable["TrustServerCertificate"] = $TrustServerCertificate

        }

        if ($HostNameInCertificate) {

            $DatabaseQueryHashTable["HostNameInCertificate"] = $HostNameInCertificate

        }

    }

    #Setting additional parameters for Invoke-SQLCMD to get

    #all the information from Notebook execution to output

    $DatabaseQueryHashTable["Verbose"] = $true

    $DatabaseQueryHashTable["ErrorVariable"] = "SqlQueryError"

    $DatabaseQueryHashTable["OutputAs"] = "DataTables"

    #The first code cell number

    $cellExecutionCount = 1

    #Iterate through Notebook Cells

    $fileContent.cells | Where-Object {

        # Ignoring Markdown or raw cells

        $_.cell_type -ne "markdown" -and $_.cell_type -ne "raw" -and $_.source -ne ""

    } | ForEach-Object {

        $NotebookCellOutputs = @()

        # Getting the source T-SQL from the cell

        # Note that the cell's source field can be

        # an array (or strings) or a scalar (string).

        # If an array, elements are properly terminated with CR/LF.

        $DatabaseQueryHashTable["Query"] = $_.source -join ''

        # Executing the T-SQL Query and storing the result and the time taken to execute

        $SqlQueryExecutionTime = Measure-Command {

            [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseDeclaredVarsMoreThanAssignments", "SqlQueryResult", Justification="Suppressing false warning.")]

            $SqlQueryResult = @( Invoke-Sqlcmd @DatabaseQueryHashTable -ErrorAction SilentlyContinue 4>&1)

        }

        # Setting the Notebook Cell Execution Count to increase count of each code cell

        # Note: handle the case where the 'execution_count' property is missing.

        if (-not ($_ | Get-Member execution_count)) {

            $_ | Add-Member -Name execution_count -Value $null -MemberType NoteProperty

        }

        $_.execution_count = $cellExecutionCount++

        $NotebookCellTableOutputs = @()

        <#

        Iterating over the results by Invoke-Sqlcmd

        There are 2 types of errors:

        1. Verbose Output: Print Statements:

            These needs to be added to the beginning of the cell outputs

        2. Datatables from the database

            These needs to be added to the end of cell outputs

        #>

        $SqlQueryResult | ForEach-Object {

            if ($_ -is [System.Management.Automation.VerboseRecord]) {

                # Adding the print statments to the cell outputs

                $NotebookCellOutputs += $(ParseStringToNotebookOutput($_.Message))

            } elseif ($_ -is [System.Data.DataTable]) {

                # Storing the print Tables into an array to be added later to the cell output

                $NotebookCellTableOutputs += $(ParseTableToNotebookOutput $_  $CellExecutionCount)

            } elseif ($_ -is [System.Data.DataRow]) {

                # Storing the print row into an array to be added later to the cell output

                $NotebookCellTableOutputs += $(ParseTableToNotebookOutput $_.Table  $CellExecutionCount)

            }

        }

        if ($SqlQueryError) {

            # Adding the parsed query error from Invoke-Sqlcmd

            $NotebookCellOutputs += $(ParseQueryErrorToNotebookOutput($SqlQueryError))

        }

        if ($SqlQueryExecutionTime) {

            # Adding the parsed execution time from Measure-Command

            $NotebookCellExcutionTimeString = "Total execution time: " + $SqlQueryExecutionTime.ToString()

            $NotebookCellOutputs += $(ParseStringToNotebookOutput($NotebookCellExcutionTimeString))

        }

        # Adding the data tables

        $NotebookCellOutputs += $NotebookCellTableOutputs

        # In the unlikely case the 'outputs' property is missing from the JSON

        # object, we add it.

        if (-not ($_ | Get-Member outputs)) {

            $_ | Add-Member -Name outputs -Value $null -MemberType NoteProperty

        }

        $_.outputs = $NotebookCellOutputs

    }

    # This will update the Output file according to the executed output of the notebook

    if ($OutputFile) {

        ($fileContent | ConvertTo-Json -Depth 100 ) | Out-File  -Encoding Ascii -FilePath $OutputFile

        Get-Item $OutputFile

    }

    else {

        $fileContent | ConvertTo-Json -Depth 100

    }

}

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