fixing readastext

Author: nvarscar

functions/Invoke-DBOQuery.ps1

@@ -369,10 +369,7 @@ function Invoke-DBOQuery {
                                         for ($j = 1; -not $name; $j++) {
                                             if ($table.Columns.ColumnName -notcontains "Column$j") { $name = "Column$j" }
                                         }
-                                        if ($datatype.FullName -eq 'System.DBNull') {
-                                            $datatype = [string]
-                                        }
-                                        elseif (!$datatype.FullName) {
+                                        if ($ReturnAsText -or $datatype.FullName -eq 'System.DBNull' -or -not $datatype.FullName) {
                                             $datatype = [string]
                                         }
                                         $null = $table.Columns.Add($name, $datatype)

tests/postgresql/Invoke-DBOQuery.Tests.ps1

@@ -179,11 +179,12 @@ Describe "Invoke-DBOQuery PostgreSQL tests" -Tag $commandName, IntegrationTests
             $result.b | Should -Be 3, 4
         }
         It "should select an unsupported datatype as text" {
-            $query = "select cast(null as aclitem[]) as a, cast('{=c/postgres}' as aclitem[]) as b"
+            $query = "select cast(null as aclitem[]) as a, cast('{=c/postgres}' as aclitem[]) as b, E'\\001'::bytea as c"
             $result = Invoke-DBOQuery -Query $query @connParams -As DataTable -ReturnAsText
-            $result.Columns.ColumnName | Should -Be @('a', 'b')
+            $result.Columns.ColumnName | Should -Be @('a', 'b', 'c')
             $result.a | Should -Be ([System.DBNull]::Value)
             $result.b | Should -Be '{=c/postgres}'
+            $result.c | Should -Be '\x01'
         }
     }
     Context "Negative tests" {