Steve Atkins wrote:
> On Aug 28, 2008, at 12:09 PM, Scott Marlowe wrote:
>> On Thu, Aug 28, 2008 at 10:14 AM, Masis, Alexander (US SSA)
>> <alexander(dot)masis(at)baesystems(dot)com> wrote:
>>> I was mapping C++ application code that works with mySQL to work with
>>> There were a number of articles on line regarding the conversion from
>>> mySQL to Postgres like:
>>> Well, in MySQL it's easy you just do:
>>> "SELECT LAST_INSERT_ID();"
>>> In Postgres, however it is not that simple. You have to know the
>>> name of so called "insert sequence". Postgres has a system function for
>>> that( SQL line below ).
>>> In Postgres you will have to provide the table and column name(
>>> "auto_increment" type in MySQL or "serial or bigserial" in Postgres).
>>> Here is that SQL query that returns the last inserted ID:
>>> "SELECT CURRVAL(
>> That's the hard way. Starting with pgsql 8.2 you can do it much more
>> create table tester (id serial primary key, info text);
>> insert into tester (info) values ('this is a text string') returning id;
>> tada! All done, that insert will return the id for you.
> Or lastval() if you want something bug-compatible with MySQL.
I am new to PostgreSQL but it seems to me that lastval() will only work
if the insert does not produce side effects that call nextval().
Consider the case where a row is inserted into a table that has an after
insert trigger and the after insert trigger inserts a row into another
table which has a serial primary key. In that case I assume that
lastval() will return the value from the serial column in the second table.
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