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Diffstat (limited to 'doc/FAQ')
| -rw-r--r-- | doc/FAQ | 12 |
1 files changed, 4 insertions, 8 deletions
@@ -1,7 +1,7 @@ Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Sat Oct 13 01:26:55 EDT 2001 + Last updated: Sun Oct 14 19:27:20 EDT 2001 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -826,10 +826,8 @@ BYTEA bytea variable-length byte array (null-safe) object with the nextval() function before inserting and then insert it explicitly. Using the example table in 4.16.1, that might look like this in Perl: - $sql = "SELECT nextval('person_id_seq')"; - $newSerialID = ($conn->selectrow_array($sql))[0]; - INSERT INTO person (id, name) VALUES ($newSerialID, 'Blaise Pascal'); - $res = $dbh->do($sql); + new_id = output of "SELECT nextval('person_id_seq')" + INSERT INTO person (id, name) VALUES (new_id, 'Blaise Pascal'); You would then also have the new value stored in $newSerialID for use in other queries (e.g., as a foreign key to the person table). Note @@ -840,9 +838,7 @@ BYTEA bytea variable-length byte array (null-safe) Alternatively, you could retrieve the assigned SERIAL value with the currval() function after it was inserted by default, e.g., INSERT INTO person (name) VALUES ('Blaise Pascal'); - $res = $conn->do($sql); - $sql = "SELECT currval('person_id_seq')"; - $newSerialID = ($conn->selectrow_array($sql))[0]; + new_id = output of "SELECT currval('person_id_seq')"; Finally, you could use the OID returned from the INSERT statement to look up the default value, though this is probably the least portable |