throw warnings for 100%-SQL-standard constructs, clean up some minor
infelicities, try to un-break ecpg to the best of my ability. (It's not clear
how ecpg is going to find out the setting of standard_conforming_strings,
though.) I think pg_dump still needs work, too.
(relpages/reltuples). To do this, create formal support in heapam.c for
"overwrite" tuple updates (including xlog replay capability) and use that
instead of the ad-hoc overwrites we'd been using in VACUUM and CREATE INDEX.
Take the responsibility for updating stats during CREATE INDEX out of the
individual index AMs, and do it where it belongs, in catalog/index.c. Aside
from being more modular, this avoids having to update the same tuple twice in
some paths through CREATE INDEX. It's probably not measurably faster, but
for sure it's a lot cleaner than before.
< * %Disallow changing default expression of a SERIAL column?
> * %Disallow changing DEFAULT expression of a SERIAL column?
472a473,476
> * Add DEFAULT .. AS OWNER so permission checks are done as the table
> owner
>
> This would be useful for SERIAL nextval() calls and CHECK constraints.
The former approach used ExclusiveLock on pg_database, which being a
cluster-wide lock meant only one of these operations could proceed at
a time; worse, it also blocked all incoming connections in ReverifyMyDatabase.
Now that we have LockSharedObject(), we can use locks of different types
applied to databases considered as objects. This allows much more
flexible management of the interlocking: two CREATE DATABASEs need not
block each other, and need not block connections except to the template
database being used. Similarly DROP DATABASE doesn't block unrelated
operations. The locking used in flatfiles.c is also much narrower in
scope than before. Per recent proposal.
This formulation requires every AM to provide amvacuumcleanup, unlike before,
but it's surely a whole lot cleaner. Also, add an 'amstorage' column to
pg_am so that we can get rid of hardwired knowledge in DefineOpClass().
support both FOR UPDATE and FOR SHARE in one command, as well as both
NOWAIT and normal WAIT behavior. The more general code is actually
simpler and cleaner.
use RESET CONNECTION:
< * Add RESET SESSION command to reset all session state
> * Add RESET CONNECTION command to reset all session state
447c447
< notify the protocol when a RESET SESSION command is used.
> notify the protocol when a RESET CONNECTION command is used.
< * Add RESET CONNECTION command to reset all session state
> * Add RESET SESSION command to reset all session state
447c447
< notify the protocol when a RESET CONNECTION command is used.
> notify the protocol when a RESET SESSION command is used.
< o %Prevent child tables from altering or dropping constraints
< like CHECK that were inherited from the parent table
< like CHECK that are inherited by child tables
<
< Dropping constraints should only be possible with CASCADE.
<
> like CHECK that are inherited by child tables unless CASCADE
> is used
> o %Prevent child tables from altering or dropping constraints
> like CHECK that were inherited from the parent table
transaction_timestamp() (just like now()).
Also update statement_timeout() to mention it is statement arrival time
that is measured.
Catalog version updated.
o Support ISO INTERVAL syntax if units cannot be determined from
the string, and are supplied after the string
The SQL standard states that the units after the string specify
the units of the string, e.g. INTERVAL '2' MINUTE should
return '00:02:00'. The current behavior has the units
restrict the interval value to the specified unit or unit range,
INTERVAL '70' SECOND returns '00:00:10'.
For syntax that isn't uniquely ISO or PG syntax, like '1' or
'1:30', treat as ISO if there is a range specification clause,
and as PG if there no clause is present, e.g. interpret
'1:30' MINUTE TO SECOND as '1 minute 30 seconds', and
interpret '1:30' as '1 hour, 30 minutes'.
This makes common cases like SELECT INTERVAL '1' MONTH
SQL-standard results. The SQL standard supports a limited
number of unit combinations and doesn't support unit names
in the string. The PostgreSQL syntax is more flexible in
the range of units supported, e.g. PostgreSQL supports
'1 year 1 hour', while the SQL standard does not.
