This parameter specifies the default table access method to use when
creating tables or materialized views if the CREATE
command does not explicitly specify an access method, or when
- SELECT ... INTO is used, which does not allow to
- specify a table access method. The default is heap.
+ SELECT ... INTO is used, which does not allow
+ specifying a table access method. The default is heap.
holding an ACCESS EXCLUSIVE lock on that partition.
It is recommended to drop the now-redundant CHECK
constraint after the ATTACH PARTITION is complete. If
- the table being attached is itself a partitioned table then each of its
+ the table being attached is itself a partitioned table, then each of its
sub-partitions will be recursively locked and scanned until either a
suitable CHECK constraint is encountered or the leaf
partitions are reached.
the partition being attached. This operation will be performed whilst
holding an ACCESS EXCLUSIVE lock on the
DEFAULT partition. If the DEFAULT partition
- is itself a partitioned table then each of its partitions will be
+ is itself a partitioned table, then each of its partitions will be
recursively checked in the same way as the table being attached, as
mentioned above.
Multivariate MCV Lists
- Another type of statistics stored for each column are most-common value
+ Another type of statistic stored for each column are most-common value
lists. This allows very accurate estimates for individual columns, but
may result in significant misestimates for queries with conditions on
multiple columns.
streaming starts on timeline tli;
otherwise, the server's current timeline is selected. The server can
reply with an error, for example if the requested section of WAL has already
- been recycled. On success, server responds with a CopyBothResponse
+ been recycled. On success, the server responds with a CopyBothResponse
message, and then starts to stream WAL to the frontend.
First, scan the directory where the WAL segment files are written and
- find the newest completed segment file, using as starting point the
- beginning of the next WAL segment file. This is calculated independently
- on the compression method used to compress each segment.
+ find the newest completed segment file, using as the starting point the
+ beginning of the next WAL segment file.
If a starting point cannot be calculated with the previous method,
the latest WAL flush location is used as reported by the server from
- a IDENTIFY_SYSTEM command.
+ an IDENTIFY_SYSTEM command.
In contrast to CREATE TABLE AS, SELECT
- INTO does not allow to specify properties like a table's access
+ INTO does not allow specifying properties like a table's access
method with or the table's
tablespace with . Use
CREATE TABLE AS if necessary. Therefore, the default table