internal/functions/Get-ObjectNameParts.ps1
function Get-ObjectNameParts { <# .SYNOPSIS Parse a one, two, or three part object name into seperate paths .DESCRIPTION Takes a one, two or three part object name and splits them into Database, Schema and Name .PARAMETER ObjectName The object name to parse. You can specify a one, two, or three part object name. If the object has special characters they must be wrapped in square brackets [ ]. If the name contains character ']' this must be escaped by duplicating the character .NOTES Tags: Object, Internal Author: Patrick Flynn (@sqllensman) Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .EXAMPLE Get-ObjectNameParts -ObjectName 'table' Parses a three-part name into its constitute parts. .EXAMPLE Get-ObjectNameParts -ObjectName '[Bad. Name]]].[Schema.With.Dots]]].[Another .Silly]] Name..]' Parses a three-part name into its constitute parts. Uses square brackets to enclose special characters. #> param ( [string]$ObjectName ) process { $fqtns = @() #Object names with a ']' charcter in the name need to be handeled #Require charcter to be escaped by being duplicated as per T-SQL QuoteName function #These need to be temporarily replaced to allow the object name to be parsed. $t = $ObjectName if ($t.Contains(']]')) { for ($i = 0; $i -le 65535; $i++) { $hexStr = '{0:X4}' -f $i $fixChar = [regex]::Unescape("\u$hexStr") if (!$t.Contains($fixChar)) { $t = $t.Replace(']]', $fixChar) break } } } else { $fixChar = $null } #If the dbo schema is empty as in database..table, it has to filled temorarily to let the regex work. if ($t.Contains('..')) { for ($i = 0; $i -le 65535; $i++) { $hexStr = '{0:X4}' -f $i $fixSchema = [regex]::Unescape("\u$hexStr") if (!$t.Contains($fixSchema)) { $t = $t.Replace('..', ".$fixSchema.") break } } } else { $fixSchema = $null } $splitName = [regex]::Matches($t, "(\[.+?\])|([^\.]+)").Value $dotcount = $splitName.Count $dbName = $schema = $name = $null switch ($dotcount) { 1 { $name = $t $parsed = $true } 2 { $schema = $splitName[0] $name = $splitName[1] $parsed = $true } 3 { $dbName = $splitName[0] $schema = $splitName[1] $name = $splitName[2] $parsed = $true } default { $parsed = $false } } if ($dbName -like "[[]*[]]") { $dbName = $dbName.Substring(1, ($dbName.Length - 2)) if ($fixChar) { $dbName = $dbName.Replace($fixChar, ']') } } if ($schema -like "[[]*[]]") { $schema = $schema.Substring(1, ($schema.Length - 2)) if ($fixChar) { $schema = $schema.Replace($fixChar, ']') } } if ($name -like "[[]*[]]") { $name = $name.Substring(1, ($name.Length - 2)) if ($fixChar) { $name = $name.Replace($fixChar, ']') } } if ($fixSchema) { $dbName = $dbName.Replace($fixSchema, '') if ($schema -eq $fixSchema) { $schema = $null } else { $schema = $dbName.Replace($fixSchema, '') } $name = $name.Replace($fixSchema, '') } $fqtns = [PSCustomObject] @{ InputValue = $ObjectName Database = $dbName Schema = $schema Name = $name Parsed = $parsed } return $fqtns } } # 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