functions/Invoke-DbaDbDataGenerator.ps1

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
function Invoke-DbaDbDataGenerator {
    <#
    .SYNOPSIS
        Invoke-DbaDbDataGenerator generates random data for tables
 
    .DESCRIPTION
        Invoke-DbaDbDataMasking is able to generate random data for tables.
 
    .PARAMETER SqlInstance
        The target SQL Server instance or instances.
 
    .PARAMETER SqlCredential
        Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
    .PARAMETER Database
        Databases to process through
 
    .PARAMETER Table
        Tables to process. By default all the tables will be processed
 
    .PARAMETER Column
        Columns to process. By default all the columns will be processed
 
    .PARAMETER FilePath
        Configuration file that contains the which tables and columns need to be masked
 
    .PARAMETER Locale
        Set the local to enable certain settings in the masking
 
    .PARAMETER CharacterString
        The characters to use in string data. 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' by default
 
    .PARAMETER ExcludeTable
        Exclude specific tables even if it's listed in the config file.
 
    .PARAMETER ExcludeColumn
        Exclude specific columns even if it's listed in the config file.
 
    .PARAMETER MaxValue
        Force a max length of strings instead of relying on datatype maxes. Note if a string datatype has a lower MaxValue, that will be used instead.
 
        Useful for adhoc updates and testing, otherwise, the config file should be used.
 
    .PARAMETER ExactLength
        Mask string values to the same length. So 'Tate' will be replaced with 4 random characters.
 
    .PARAMETER ModulusFactor
        Calculating the next nullable by using the remainder from the modulus. Default is every 10.
 
    .PARAMETER Force
        Forcefully execute commands when needed
 
    .PARAMETER WhatIf
        If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run.
 
    .PARAMETER Confirm
        If this switch is enabled, you will be prompted for confirmation before executing any operations that change state.
 
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
    .NOTES
        Tags: DataGeneration, Database
        Author: Sander Stad (@sqlstad, sqlstad.nl)
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
    .LINK
        https://dbatools.io/Invoke-DbaDbDataGenerator
 
    .EXAMPLE
        Invoke-DbaDbDataGenerator -SqlInstance sqldb2 -Database DB1 -FilePath C:\temp\sqldb1.db1.tables.json
 
        Apply the data generation configuration from the file "sqldb1.db1.tables.json" to the db1 database on sqldb2. Prompt for confirmation for each table.
 
    #>


    [CmdLetBinding(SupportsShouldProcess, ConfirmImpact = "High")]
    param (
        [DbaInstanceParameter[]]$SqlInstance,
        [PSCredential]$SqlCredential,
        [string[]]$Database,
        [parameter(Mandatory, ValueFromPipeline)]
        [Alias('Path', 'FullName')]
        [object]$FilePath,
        [string]$Locale = 'en',
        [string]$CharacterString = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
        [string[]]$Table,
        [string[]]$Column,
        [string[]]$ExcludeTable,
        [string[]]$ExcludeColumn,
        [int]$MaxValue,
        [switch]$ExactLength,
        [int]$ModulusFactor = 10,
        [switch]$EnableException
    )

    begin {
        if ($Force) {$ConfirmPreference = 'none'}

        # Create the faker objects
        try {
            $faker = New-Object Bogus.Faker($Locale)
        } catch {
            Stop-Function -Message "Could not load randomizer class" -Continue
        }

        $supportedDataTypes = 'bigint', 'bit', 'bool', 'char', 'date', 'datetime', 'datetime2', 'decimal', 'int', 'float', 'guid', 'money', 'numeric', 'nchar', 'ntext', 'nvarchar', 'real', 'smalldatetime', 'smallint', 'text', 'time', 'tinyint', 'uniqueidentifier', 'userdefineddatatype', 'varchar'
        $supportedFakerMaskingTypes = ($faker | Get-Member -MemberType Property | Select-Object Name -ExpandProperty Name)
        $supportedFakerSubTypes = ($faker | Get-Member -MemberType Property) | ForEach-Object { ($faker.$($_.Name)) | Get-Member -MemberType Method | Where-Object { $_.Name -notlike 'To*' -and $_.Name -notlike 'Get*' -and $_.Name -notlike 'Trim*' -and $_.Name -notin 'Add', 'Equals', 'CompareTo', 'Clone', 'Contains', 'CopyTo', 'EndsWith', 'IndexOf', 'IndexOfAny', 'Insert', 'IsNormalized', 'LastIndexOf', 'LastIndexOfAny', 'Normalize', 'PadLeft', 'PadRight', 'Remove', 'Replace', 'Split', 'StartsWith', 'Substring', 'Letter', 'Lines', 'Paragraph', 'Paragraphs', 'Sentence', 'Sentences' } | Select-Object name -ExpandProperty Name }
        $supportedFakerSubTypes += "Date"
        #$foreignKeyQuery = Get-Content -Path "$script:PSModuleRoot\bin\datageneration\ForeignKeyHierarchy.sql"
    }

    process {
        if (Test-FunctionInterrupt) { return }

        if ($FilePath.ToString().StartsWith('http')) {
            $tables = Invoke-RestMethod -Uri $FilePath
        } else {
            # Check if the destination is accessible
            if (-not (Test-Path -Path $FilePath)) {
                Stop-Function -Message "Could not find data generation config file $FilePath" -Target $FilePath
                return
            }

            # Test the configuration
            try {
                Test-DbaDbDataGeneratorConfig -FilePath $FilePath -EnableException
            } catch {
                Stop-Function -Message "Errors found testing the configuration file. `n$_" -ErrorRecord $_ -Target $FilePath
                return
            }

            # Get all the items that should be processed
            try {
                $tables = Get-Content -Path $FilePath -ErrorAction Stop | ConvertFrom-Json -ErrorAction Stop
            } catch {
                Stop-Function -Message "Could not parse masking config file" -ErrorRecord $_ -Target $FilePath
                return
            }
        }

        foreach ($tabletest in $tables.Tables) {
            if ($Table -and $tabletest.Name -notin $Table) {
                continue
            }
            foreach ($columntest in $tabletest.Columns) {
                if ($columntest.ColumnType -in 'hierarchyid', 'geography', 'xml', 'geometry' -and $columntest.Name -notin $Column) {
                    Stop-Function -Message "$($columntest.ColumnType) is not supported, please remove the column $($columntest.Name) from the $($tabletest.Name) table" -Target $tables
                }
            }
        }

        foreach ($instance in $SqlInstance) {
            try {
                $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 9
            } catch {
                Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue
            }

            if ($Database) {
                $dbs = Get-DbaDatabase -SqlInstance $server -Database $Database
            } else {
                $dbs = Get-DbaDatabase -SqlInstance $server -Database $tables.Name
            }

            $sqlconn = $server.ConnectionContext.SqlConnectionObject.PsObject.Copy()
            $sqlconn.Open()

            foreach ($db in $dbs) {
                $stepcounter = $nullmod = 0

                #$foreignKeys = Invoke-DbaQuery -SqlInstance $instance -SqlCredential $SqlCredential -Database $db -Query $foreignKeyQuery

                foreach ($tableobject in $tables.Tables) {

                    if ($tableobject.Name -in $ExcludeTable -or ($Table -and $tableobject.Name -notin $Table)) {
                        Write-Message -Level Verbose -Message "Skipping $($tableobject.Name) because it is explicitly excluded"
                        continue
                    }

                    if ($tableobject.Name -notin $db.Tables.Name) {
                        Stop-Function -Message "Table $($tableobject.Name) is not present in $db" -Target $db -Continue
                    }

                    $uniqueValues = @()

                    # Check if the table contains unique indexes
                    if ($tableobject.HasUniqueIndex) {
                        # Loop through the rows and generate a unique value for each row
                        Write-Message -Level Verbose -Message "Generating unique values for $($tableobject.Name)"

                        for ($i = 0; $i -lt $tableobject.Rows; $i++) {
                            $rowValue = New-Object PSCustomObject

                            # Loop through each of the unique indexes
                            foreach ($index in ($db.Tables[$($tableobject.Name)].Indexes | Where-Object IsUnique -eq $true )) {

                                # Loop through the index columns
                                foreach ($indexColumn in $index.IndexedColumns) {
                                    # Get the column mask info
                                    $columnMaskInfo = $tableobject.Columns | Where-Object Name -eq $indexColumn.Name

                                    if ($columnMaskInfo) {
                                        # Generate a new value
                                        try {
                                            if ($columnobject.SubType -in $supportedDataTypes) {
                                                $newValue = Get-DbaRandomizedValue -DataType $columnMaskInfo.SubType -Locale $Locale
                                            } else {
                                                $newValue = Get-DbaRandomizedValue -RandomizerType $columnMaskInfo.MaskingType -RandomizerSubtype $columnMaskInfo.SubType -Locale $Locale
                                            }

                                        } catch {
                                            Stop-Function -Message "Failure" -Target $columnMaskInfo -Continue -ErrorRecord $_
                                        }

                                        # Check if the value is already present as a property
                                        if (($rowValue | Get-Member -MemberType NoteProperty).Name -notcontains $indexColumn.Name) {
                                            $rowValue | Add-Member -Name $indexColumn.Name -Type NoteProperty -Value $newValue
                                        }
                                    }

                                }

                                # To be sure the values are unique, loop as long as long as needed to generate a unique value
                                while (($uniqueValues | Select-Object -Property ($rowValue | Get-Member -MemberType NoteProperty | Select-Object -ExpandProperty Name)) -match $rowValue) {

                                    $rowValue = New-Object PSCustomObject

                                    # Loop through the index columns
                                    foreach ($indexColumn in $index.IndexedColumns) {
                                        # Get the column mask info
                                        $columnMaskInfo = $tableobject.Columns | Where-Object Name -eq $indexColumn.Name

                                        # Generate a new value
                                        try {
                                            $columnValue = $null

                                            if ($columnobject.SubType -in $supportedDataTypes) {
                                                $newValue = Get-DbaRandomizedValue -DataType $columnMaskInfo.SubType -Locale $Locale
                                            } else {
                                                $newValue = Get-DbaRandomizedValue -RandomizerType $columnMaskInfo.MaskingType -RandomizerSubtype $columnMaskInfo.SubType -Locale $Locale
                                            }

                                        } catch {
                                            Stop-Function -Message "Failure" -Target $faker -Continue -ErrorRecord $_
                                        }

                                        # Check if the value is already present as a property
                                        if (($rowValue | Get-Member -MemberType NoteProperty).Name -notcontains $indexColumn.Name) {
                                            $rowValue | Add-Member -Name $indexColumn.Name -Type NoteProperty -Value $newValue
                                            $uniqueValueColumns += $indexColumn.Name
                                        }
                                    }
                                }
                            }
                            # Add the row value to the array
                            $uniqueValues += $rowValue
                        }
                    }

                    $uniqueValueColumns = $uniqueValueColumns | Select-Object -Unique

                    if (-not $server.IsAzure) {
                        $sqlconn.ChangeDatabase($db.Name)
                    }
                    $tablecolumns = $tableobject.Columns

                    if ($Column) {
                        $tablecolumns = $tablecolumns | Where-Object Name -in $Column
                    }

                    if ($ExcludeColumn) {
                        $tablecolumns = $tablecolumns | Where-Object Name -notin $ExcludeColumn
                    }

                    if (-not $tablecolumns) {
                        Write-Message -Level Verbose "No columns to process in $($db.Name).$($tableobject.Schema).$($tableobject.Name), moving on"
                        continue
                    }

                    $insertQuery = ""

                    if ($Pscmdlet.ShouldProcess($instance, "Generating data $($tablecolumns.Name -join ', ') in $($data.Rows.Count) rows in $($db.Name).$($tableobject.Schema).$($tableobject.Name)")) {
                        $elapsed = [System.Diagnostics.Stopwatch]::StartNew()

                        Write-ProgressHelper -StepNumber ($stepcounter++) -TotalSteps $tables.Tables.Count -Activity "Generating data" -Message "Inserting $($tableobject.Rows) rows in $($tableobject.Schema).$($tableobject.Name) in $($db.Name) on $instance"

                        if ($tableobject.TruncateTable) {
                            $query += "TRUNCATE TABLE [$($tableobject.Schema)].[$($tableobject.Name)];`n"

                            try {
                                $null = Invoke-DbaQuery -SqlInstance $SqlInstance -SqlCredential $SqlCredential -Database $db.Name -Query $query
                            } catch {
                                Write-Message -Level VeryVerbose -Message "$query"
                                $errormessage = $_.Exception.Message.ToString()
                                Stop-Function -Message "Error truncating $($tableobject.Schema).$($tableobject.Name): $errormessage" -Target $query -Continue -ErrorRecord $_
                            }
                        }

                        if ($tableobject.Columns.Identity -contains $true) {
                            $query = "SELECT IDENT_CURRENT('[$($tableobject.Schema)].[$($tableobject.Name)]') AS CurrentIdentity,
                            IDENT_INCR('[$($tableobject.Schema)].[$($tableobject.Name)]') AS IdentityIncrement,
                            IDENT_SEED('[$($tableobject.Schema)].[$($tableobject.Name)]') AS IdentitySeed;"


                            try {
                                $identityValues = Invoke-DbaQuery -SqlInstance $SqlInstance -SqlCredential $SqlCredential -Database $db.Name -Query $query
                            } catch {
                                Write-Message -Level VeryVerbose -Message "$query"
                                $errormessage = $_.Exception.Message.ToString()
                                Stop-Function -Message "Error setting identity values from $($tableobject.Schema).$($tableobject.Name): $errormessage" -Target $query -Continue -ErrorRecord $_
                            }

                            $insertQuery += "SET IDENTITY_INSERT [$($tableobject.Schema)].[$($tableobject.Name)] ON;`n"
                        }

                        $insertQuery += "INSERT INTO [$($tableobject.Schema)].[$($tableobject.Name)] ([$($tablecolumns.Name -join '],[')])`nVALUES`n"

                        [int]$nextIdentity = $null

                        for ($i = 1; $i -le $tableobject.Rows; $i++) {
                            $columnValues = @()

                            foreach ($columnobject in $tablecolumns) {

                                if ($columnobject.ColumnType -notin $supportedDataTypes) {
                                    Stop-Function -Message "Unsupported data type '$($columnobject.ColumnType)' for column $($columnobject.Name)" -Target $columnobject -Continue
                                }

                                if ($columnobject.MaskingType -notin $supportedFakerMaskingTypes) {
                                    Stop-Function -Message "Unsupported masking type '$($columnobject.MaskingType)' for column $($columnobject.Name)" -Target $columnobject -Continue
                                }

                                if ($columnobject.SubType -notin $supportedFakerSubTypes) {
                                    Stop-Function -Message "Unsupported masking sub type '$($columnobject.SubType)' for column $($columnobject.Name)" -Target $columnobject -Continue
                                }

                                # make sure max is good
                                if ($columnobject.Nullable -and (($nullmod++) % $ModulusFactor -eq 0)) {
                                    $columnValue = $null
                                } elseif ($tableobject.HasUniqueIndex -and $columnobject.Name -in $uniqueValueColumns) {

                                    if ($uniqueValues.Count -lt 1) {
                                        Stop-Function -Message "Could not find any unique values in dictionary" -Target $tableobject
                                        return
                                    }

                                    $columnValue = $uniqueValues[$rowNumber].$($columnobject.Name)

                                } elseif ($columnobject.Identity) {
                                    if ($nextIdentity -or (-not $nextIdentity -and $tableobject.TruncateTable)) {
                                        $nextIdentity += $identityValues.IdentityIncrement
                                    } else {
                                        $nextIdentity = $identityValues.CurrentIdentity + $identityValues.IdentityIncrement
                                    }
                                    $columnValue = $nextIdentity
                                } else {

                                    if ($columnobject.CharacterString) {
                                        $charstring = $columnobject.CharacterString
                                    } else {
                                        $charstring = $CharacterString
                                    }

                                    if (($columnobject.MinValue -or $columnobject.MaxValue) -and ($columnobject.ColumnType -match 'date')) {
                                        $nowmin = $columnobject.MinValue
                                        $nowmax = $columnobject.MaxValue
                                        if (-not $nowmin) {
                                            $nowmin = (Get-Date -Date $nowmax).AddDays(-365)
                                        }
                                        if (-not $nowmax) {
                                            $nowmax = (Get-Date -Date $nowmin).AddDays(365)
                                        }
                                    }

                                    try {
                                        $columnValue = $null

                                        if ($columnobject.SubType -in $supportedDataTypes) {
                                            $columnValue = Get-DbaRandomizedValue -DataType $columnobject.SubType -CharacterString $charstring -Locale $Locale
                                        } else {
                                            $columnValue = Get-DbaRandomizedValue -RandomizerType $columnobject.MaskingType -RandomizerSubtype $columnobject.SubType -CharacterString $charstring -Locale $Locale
                                        }

                                    } catch {
                                        Stop-Function -Message "Failure" -Target $faker -Continue -ErrorRecord $_
                                    }

                                }

                                if ($null -eq $columnValue -and $columnobject.Nullable -eq $true) {
                                    $columnValues += 'NULL'
                                } elseif ($columnobject.ColumnType -eq 'xml') {
                                    # nothing, unsure how i'll handle this
                                } elseif ($columnobject.ColumnType -in 'uniqueidentifier') {
                                    $columnValues += "'$columnValue'"
                                } elseif ($columnobject.ColumnType -match 'int') {
                                    $columnValues += "$columnValue"
                                } elseif ($columnobject.ColumnType -in 'bit', 'bool') {
                                    if ($columnValue) {
                                        $columnValues += "1"
                                    } else {
                                        $columnValues += "0"
                                    }
                                } else {
                                    $columnValue = ($columnValue).Tostring().Replace("'", "''")
                                    $columnValues += "'$columnValue'"
                                }
                            }

                            if ($i -lt $tableobject.Rows) {
                                $insertQuery += "( $($columnValues -join ',') ),`n"
                            } else {
                                $insertQuery += "( $($columnValues -join ',') );`n"
                            }
                        }

                        if ($tableobject.Columns.Identity -contains $true) {
                            $insertQuery += "SET IDENTITY_INSERT [$($tableobject.Schema)].[$($tableobject.Name)] OFF;"
                        }

                        try {
                            $transaction = $sqlconn.BeginTransaction()
                            $sqlcmd = New-Object System.Data.SqlClient.SqlCommand($insertQuery, $sqlconn, $transaction)
                            $null = $sqlcmd.ExecuteNonQuery()
                        } catch {
                            Write-Message -Level VeryVerbose -Message "$insertQuery"
                            $errormessage = $_.Exception.Message.ToString()
                            Stop-Function -Message "Error inserting $($tableobject.Schema).$($tableobject.Name): $errormessage" -Target $insertQuery -Continue -ErrorRecord $_
                        }


                    }

                    try {
                        $null = $transaction.Commit()
                        [pscustomobject]@{
                            ComputerName = $db.Parent.ComputerName
                            InstanceName = $db.Parent.ServiceName
                            SqlInstance  = $db.Parent.DomainInstanceName
                            Database     = $db.Name
                            Schema       = $tableobject.Schema
                            Table        = $tableobject.Name
                            Columns      = $tableobject.Columns.Name
                            Rows         = $tableobject.Rows
                            Elapsed      = [prettytimespan]$elapsed.Elapsed
                            Status       = "Done"
                        }
                    } catch {
                        Stop-Function -Message "Error inserting into $($tableobject.Schema).$($tableobject.Name)" -Target $insertQuery -Continue -ErrorRecord $_
                    }
                }
            }

            try {
                $sqlconn.Close()
            } catch {
                Stop-Function -Message "Failure" -Continue -ErrorRecord $_
            }
        }
    }
}