Обсуждение: how plsql work on postgresql
Hi, All
I just start to learn plsql and plpgsql. There are a lot of comparison of pl/sql and pl/pgsql available online. I am wondering why plsql work well on Postgresql and how it work? Is the code converted to plpgsql code?
If use postgresql database server, which one is better between plsql and pl/pgsql?
Your feedback is highly appreciated.
Sincerely,
Selina
If use postgresql database server, which one is better between plsql and pl/pgsql?
Your feedback is highly appreciated.
Sincerely,
Selina
On 03/29/2016 03:57 PM, Selina Tech wrote: > Hi, All > > I just start to learn plsql and plpgsql. There are a lot of > comparison of pl/sql and pl/pgsql available online. I am wondering why > plsql work well on Postgresql and how it work? Is the code converted to > plpgsql code? > If use postgresql database server, which one is better > between plsql and pl/pgsql? I find myself using pl/pgsql more then plsql(assuming you mean this(http://www.postgresql.org/docs/9.5/interactive/xfunc-sql.html)) just because pl/pgsql offers more ways to manipulate data. FYI, there are languages available e.g. pl/pythonu, pl/perl, pl/tcl. pl/java, etc. Some resources: http://www.postgresql.org/docs/9.5/interactive/plpgsql-porting.html http://ora2pg.darold.net/documentation.html#plsql_to_plpsql_convertion > > > Your feedback is highly appreciated. > > Sincerely, > Selina -- Adrian Klaver adrian.klaver@aklaver.com
Hi, AllI just start to learn plsql and plpgsql. There are a lot of comparison of pl/sql and pl/pgsql available online. I am wondering why plsql work well on Postgresql and how it work? Is the code converted to plpgsql code?
If use postgresql database server, which one is better between plsql and pl/pgsql?
Your feedback is highly appreciated.
It isn't "plsql", just "SQL" - but I might be losing something in the translation. "pl/sql" is an Oracle thing that is indeed like "pl/pgsql" - but "pl/sql" does not directly work, let alone well, on PostgreSQL...
Anyway, writing a function in "LANGUAGE sql" means you are limited to only those things SQL can do. Using pl/pgsql gives you access to the power of procedural logic among other things.
There is no "better" - but the general rule is if it can be done using SQL then do so since you are likely to see better performance. When you need to do something SQL cannot do then consider pl/pgsql.
David J.
On Tue, Mar 29, 2016 at 4:19 PM, David G. Johnston <david.g.johnston@gmail.com> wrote:
Like David has said, it is not clear what you are talking about. Hi, AllI just start to learn plsql and plpgsql. There are a lot of comparison of pl/sql and pl/pgsql available online. I am wondering why plsql work well on Postgresql and how it work? Is the code converted to plpgsql code?
If use postgresql database server, which one is better between plsql and pl/pgsql?
Your feedback is highly appreciated.It isn't "plsql", just "SQL" - but I might be losing something in the translation. "pl/sql" is an Oracle thing that is indeed like "pl/pgsql" - but "pl/sql" does not directly work, let alone well, on PostgreSQL...Anyway, writing a function in "LANGUAGE sql" means you are limited to only those things SQL can do. Using pl/pgsql gives you access to the power of procedural logic among other things.There is no "better" - but the general rule is if it can be done using SQL then do so since you are likely to see better performance. When you need to do something SQL cannot do then consider pl/pgsql.David J.
- PL/SQL runs only on an Oracle DB
- SQL - there is a Postgres version for Postgres and an Oracle version for Oracle
- SPL - This is a language that is added on to Postgres and it is intended to be as much like Oracle PL/SQL as is possible. It allows people to migrate from Oracle to Postgres with minimal changes to code.
- PL/PGSQL this is Postgres only. It is kind of like PL/SQL but also very different. I prefer this over SPL because, IMO, it performs better.
Michael Moore schrieb am 30.03.2016 um 17:23: > Like David has said, it is not clear what you are talking about. > > * PL/SQL runs only on an Oracle DB > * SQL - there is a Postgres version for Postgres and an Oracle version for Oracle > * SPL - This is a language that is added on to Postgres and it is intended to be as much like Oracle PL/SQL as is possible. > It allows people to migrate from Oracle to Postgres with minimal changes to code. > * PL/PGSQL this is Postgres only. It is kind of like PL/SQL but also very different. I prefer this over SPL because,IMO, it performs better. > I have never heard of SPL. Is that a separate module? Where is that available?
On Wed, Mar 30, 2016 at 8:37 AM, Thomas Kellerer <spam_eater@gmx.net> wrote:
Michael Moore schrieb am 30.03.2016 um 17:23:
> Like David has said, it is not clear what you are talking about.
>
> * PL/SQL runs only on an Oracle DB
> * SQL - there is a Postgres version for Postgres and an Oracle version for Oracle
> * SPL - This is a language that is added on to Postgres and it is intended to be as much like Oracle PL/SQL as is possible.
> It allows people to migrate from Oracle to Postgres with minimal changes to code.
> * PL/PGSQL this is Postgres only. It is kind of like PL/SQL but also very different. I prefer this over SPL because, IMO, it performs better.
>
I have never heard of SPL. Is that a separate module? Where is that available?
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Thomas,
It is the language that EnterpriseDB uses. The EnterpriseDB web site appears to be down but here is another link to some information:
http://www.praetoriate.com/t_edb_block_structure.htm
http://www.praetoriate.com/t_edb_block_structure.htm
Hi, All:
I tried to ask why "LANGUAGE sql" work on postgresql. Thanks for your reply. Those answer are very helpful.
Sincerely,
Selina
I tried to ask why "LANGUAGE sql" work on postgresql. Thanks for your reply. Those answer are very helpful.
Sincerely,
Selina
On Wed, Mar 30, 2016 at 10:13 AM, Michael Moore <michaeljmoore@gmail.com> wrote:
On Wed, Mar 30, 2016 at 8:37 AM, Thomas Kellerer <spam_eater@gmx.net> wrote:Michael Moore schrieb am 30.03.2016 um 17:23:
> Like David has said, it is not clear what you are talking about.
>
> * PL/SQL runs only on an Oracle DB
> * SQL - there is a Postgres version for Postgres and an Oracle version for Oracle
> * SPL - This is a language that is added on to Postgres and it is intended to be as much like Oracle PL/SQL as is possible.
> It allows people to migrate from Oracle to Postgres with minimal changes to code.
> * PL/PGSQL this is Postgres only. It is kind of like PL/SQL but also very different. I prefer this over SPL because, IMO, it performs better.
>
I have never heard of SPL. Is that a separate module? Where is that available?
--
Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-sqlThomas,It is the language that EnterpriseDB uses. The EnterpriseDB web site appears to be down but here is another link to some information:
http://www.praetoriate.com/t_edb_block_structure.htm