Обсуждение: Transactions in Postgres

HI,

I am running Postgresql-7.2 with PHP 4.1.1 and I am beginning to use
transactions inside of a php script:

$Link = pg_connect("host=$Host dbname=$DBName user=$User") or die
("Couldn't connect to the database $DBName");

 $Query = "BEGIN WORK; INSERT into $TableName
(firstname,lastname,emailaddress,comments,created)
values('$Array[FirstName]',
'$Array[LastName]','$Array[email]','$Array[Comments]', 'now()');
COMMIT;";

 // Test to see if the query was succeful or not

 pg_exec($Link, $Query) or die ("Couldn't insert name $firstname");

 if (pg_exec($Link,$Query)) {
 echo "<h1>Insert was successful</h1>";
 } else {
 echo "<H1>Insert was not successful</H1>";

What I am finding is that this query will insert a new name twice in the
database within milliseconds of each other.  What am I missing in doing
this?  Any help is appreciated.

Trevor

hi

you do exactly twice the execution of the sql command
(pg_exec)


--- root <trevor@hailix.com> wrote:
> HI,
>
> I am running Postgresql-7.2 with PHP 4.1.1 and I am
> beginning to use
> transactions inside of a php script:
>
> $Link = pg_connect("host=$Host dbname=$DBName
> user=$User") or die
> ("Couldn't connect to the database $DBName");
>
>  $Query = "BEGIN WORK; INSERT into $TableName
> (firstname,lastname,emailaddress,comments,created)
> values('$Array[FirstName]',
>
'$Array[LastName]','$Array[email]','$Array[Comments]',
> 'now()');
> COMMIT;";
>
>  // Test to see if the query was succeful or not
>
>  pg_exec($Link, $Query) or die ("Couldn't insert
> name $firstname");
>
>  if (pg_exec($Link,$Query)) {
>  echo "<h1>Insert was successful</h1>";
>  } else {
>  echo "<H1>Insert was not successful</H1>";
>
> What I am finding is that this query will insert a
> new name twice in the
> database within milliseconds of each other.  What am
> I missing in doing
> this?  Any help is appreciated.
>
> Trevor
>
>
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=====
Best Regards,

Ivan Horvath

Anyone who has never made a mistake has never tried anything new.

/Albert Einstein/

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Trevor,

> I am running Postgresql-7.2 with PHP 4.1.1 and I am beginning to use
> transactions inside of a php script:

This issue has been raised and resolved on the pgsql-php list.  Browse
 the archives of that list, and if you can't find it, post your
 question to pgsql-php.

FWIW, transactions within postgres must happen in a single connection.

-Josh Berkus

You are running pg_exec twice, so you should get two
inserts.

Try:

$result = pg_exec(....
if($result)...

HTH,
Troy

--- root <trevor@hailix.com> wrote:
> HI,
>
> I am running Postgresql-7.2 with PHP 4.1.1 and I am
> beginning to use
> transactions inside of a php script:
>
> $Link = pg_connect("host=$Host dbname=$DBName
> user=$User") or die
> ("Couldn't connect to the database $DBName");
>
>  $Query = "BEGIN WORK; INSERT into $TableName
> (firstname,lastname,emailaddress,comments,created)
> values('$Array[FirstName]',
>
'$Array[LastName]','$Array[email]','$Array[Comments]',
> 'now()');
> COMMIT;";
>
>  // Test to see if the query was succeful or not
>
>  pg_exec($Link, $Query) or die ("Couldn't insert
> name $firstname");
>
>  if (pg_exec($Link,$Query)) {
>  echo "<h1>Insert was successful</h1>";
>  } else {
>  echo "<H1>Insert was not successful</H1>";
>
> What I am finding is that this query will insert a
> new name twice in the
> database within milliseconds of each other.  What am
> I missing in doing
> this?  Any help is appreciated.
>
> Trevor
>
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please
> send an appropriate
> subscribe-nomail command to majordomo@postgresql.org
> so that your
> message can get through to the mailing list cleanly


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