On tis, 2010-02-23 at 16:54 -0500, Jaime Casanova wrote:
> On Tue, Feb 23, 2010 at 2:02 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > There may be some value in inventing a "has no side effects" marker, but
> > that should not be confused with IMMUTABLE/STABLE.
> a READONLY function?
<SQL-data access indication> ::=
| CONTAINS SQL
| READS SQL DATA
| MODIFIES SQL DATA
Notice also that this is separate from
<deterministic characteristic> ::=
| NOT DETERMINISTIC
which is the SQL standard's variant of volatility.
So someone has already had the idea that these two should exist
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