| From: | jian he <jian(dot)universality(at)gmail(dot)com> |
|---|---|
| To: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | support virtual generated column not null constraint |
| Date: | 2025-02-10 13:33:41 |
| Message-ID: | CACJufxHArQysbDkWFmvK+D1TPHQWWTxWN15cMuUaTYX3xhQXgg@mail.gmail.com |
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| Lists: | pgsql-hackers |
hi.
Virtual generated columns committed,
https://git.postgresql.org/cgit/postgresql.git/commit/?id=83ea6c54025bea67bcd4949a6d58d3fc11c3e21b
This patch is for implementing not null constraints on virtual
generated columns.
NOT NULL constraints on virtual generated columns mean that
if we INSERT a row into the table and the evaluation of the generated
expression results in a null value,
an ERRCODE_NOT_NULL_VIOLATION error will be reported.
main gotcha is in ExecConstraints, expand the generated expression
and convert a not null constraint to a check constraint and evaluate it.
| Attachment | Content-Type | Size |
|---|---|---|
| v1-0001-support-virtual-generated-column-not-null-constra.patch | text/x-patch | 16.4 KB |
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