Powershell 循环，带有 sqlplus 连接字符串

Question

我想创建一个 power shell 脚本，它使用 sqlplus 循环连接字符串，但我不确定如何在 power shell 中执行此操作。

类似：

begin
  for i in 1..10
  loop
    sqlplus .../...@'(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=...)(HOST=...)(PORT=...)))(CONNECT_DATA=(SID=...)))
    --- wait for response then move foreward
  end loop;
end

想法是我想测试连接字符串中不同的connection_timeout值以确定哪个值更稳定。

我在网上找到了这段 powershell 代码，但我不确定如何根据我的要求对其进行调整：

$lines = Get-Content 'c:\firstsecondnames.txt'
$DBs = "192.168.1.1"
$DB = "DBA"
$ConnectionTimeout = 90
$QueryTimeout = 90

foreach ($line in $lines) {
    $vala  = $line.Split(',')[0]
    $valb  = $line.Split(',')[1]
    #DB query
    $Query = "select ValC from dbo.PROCESSED_INTERCHANGES where Firstname = '$vala' and middlename = '$valb'"
    $conn=new-object System.Data.SqlClient.SQLConnection
    $ConnectionString = "Server={0};Database={1};Integrated Security=True;Connect Timeout={2}" -f $DBs,$DB,$ConnectionTimeout
    $conn.ConnectionString=$ConnectionString
    $conn.Open()
    $cmd=new-object system.Data.SqlClient.SqlCommand($Query,$conn)
    $cmd.CommandTimeout=$QueryTimeout
    $ds=New-Object system.Data.DataSet
    $da=New-Object system.Data.SqlClient.SqlDataAdapter($cmd)
    [void]$da.fill($ds)
    $conn.Close()
    $conn.Dispose()
    foreach ($valC in $ds.tables[0].rows.ValC) {
        $fullname = $vala + $valb + $valC
      Write-Host $fullname
    }

} 

Answer 1

如果您只想测试各种 connection_timeout 值，则应遍历这些值，而不是遍历一组用户 FirstNames 和 MiddleNames。

类似这样的：

$DBs = "192.168.1.1"
$DB  = "DBA"
# insert working values here. We don't test these, we only try out different ConnectionTimeouts
$vala  = 'FirstName'
$valb  = 'MiddleName'
$QueryTimeout = 90
# try a range of connection timeout values. For demo here 10, 20 .. 200 + 0
$ConnectionTimeout = for ($i = 10; $i -le 200; $i += 10) { $i }
# lastly, add 'Infinite' value 0
$ConnectionTimeout += 0

$ConnectionTimeout | ForEach-Object {
    # show what timeout value is now in effect
    Write-Host $(switch ($_){
        0       { "Attempting Infinite timeout $_" ; break}
        30      { "Attempting Default timeout $_"  ; break }
        default { "Attempting timeout $_" }
    }) -ForegroundColor Cyan
    #DB query
    $Query = "select ValC from dbo.PROCESSED_INTERCHANGES where Firstname = '$vala' and middlename = '$valb'"
    $conn = New-Object System.Data.SqlClient.SQLConnection
    $ConnectionString = "Server={0};Database={1};Integrated Security=True;Connect Timeout={2}" -f $DBs, $DB, $_
    $conn.ConnectionString = $ConnectionString
    $conn.Open()
    $cmd = New-Object system.Data.SqlClient.SqlCommand($Query,$conn)
    $cmd.CommandTimeout = $QueryTimeout
    $ds = New-Object system.Data.DataSet
    $da = New-Object system.Data.SqlClient.SqlDataAdapter($cmd)
    [void]$da.fill($ds)
    foreach ($valC in $ds.tables[0].rows.ValC) {
        $fullname = $vala + $valb + $valC
        Write-Host $fullname
    }
    # clean-up
    $conn.Close()
    $conn.Dispose()
    $ds.Dispose()
    $da.Dispose()
}