#SQLITE UPDATE AUTOINCREMENT GENERATOR#
#SQLITE UPDATE AUTOINCREMENT CODE#

If you DO add a PK of type Integer with the Auto-increment attribute, SQLite will map that to the ROWID value so the two are synomous. If you delete the current highest rowid and insert a new row, that new row will get the same rowid, as it is again the “next in sequence” Deleted records will cause gaps in the sequence.

This value can be referenced by “ROWID”, “ ROWID” or “OID”… it is auto incremented with each insert… records can be addressed quickly by using this value in your queries. Thank you in advance for your consideration of this subject.īy default SQLite adds a 64bit unsigned Integer value to each record. I tried writing a null to my PK and leaving it unaddressed, and neither results in an autoincrement. In my experience, this does not seem to be the case. They also mention (inscrutably, I think) that the invisible field (or property) ‘rowid’ is ‘aliased’ by the primary key, which, it must be assumed, inherits an autoincremented value. While I’m on the subject, the SQLite docs do not advise using autoincrement on a primary key field definition, citing overhead.

#SQLITE UPDATE AUTOINCREMENT CODE#

Does anybody know what the score is on this? And, if there is example code available, please point me in that general direction.

#SQLITE UPDATE AUTOINCREMENT GENERATOR#

Another gentleman wrote a source code generator which uses named parameters and, in place of a bind function, something called “sql.parameters(fieldname)”, about which I can find nothing. A gentleman on the Database forum suggested otherwise, which is my experience thus far.

I am told by the Xojo docs that SQLite named parameters are supported in prepared statements. I’m hipper to databases than I am to Xojo, so I didn’t expect to have so much of a problem with this, as in PHP (and a few other web languages) prepared statements give you a few options. I’m a total noob playing with Xojo for a week or so.

Sqlite update autoincrement