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Clone extended stats in CREATE TABLE (LIKE INCLUDING ALL)

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The LIKE INCLUDING ALL clause to CREATE TABLE intuitively indicates
cloning of extended statistics on the source table, but it failed to do
so.  Patch it up so that it does.  Also include an INCLUDING STATISTICS
option to the LIKE clause, so that the behavior can be requested
individually, or excluded individually.

While at it, reorder the INCLUDING options, both in code and in docs, in
alphabetical order which makes more sense than feature-implementation
order that was previously used.

Backpatch this to Postgres 10, where extended statistics were
introduced, because this is seen as an oversight in a fresh feature
which is better to get consistent from the get-go instead of changing
only in pg11.

In pg11, comments on statistics objects are cloned too.  In pg10 they
are not, because I (Álvaro) was too coward to change the parse node as
required to support it.  Also, in pg10 I chose not to renumber the
parser symbols for the various INCLUDING options in LIKE, for the same
reason.  Any corresponding user-visible changes (docs) are backpatched,
though.

Reported-by: Stephen Froehlich
Author: David Rowley
Reviewed-by: Álvaro Herrera, Tomas Vondra
Discussion: https://postgr.es/m/CY1PR0601MB1927315B45667A1B679D0FD5E5EF0@CY1PR0601MB1927.namprd06.prod.outlook.com
This commit is contained in:
Alvaro Herrera
2018-03-05 19:37:19 -03:00
parent c2c537c56d
commit 5564c11815
11 changed files with 323 additions and 37 deletions
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5
src/backend/commands/indexcmds.c
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@ -1805,7 +1805,8 @@ GetDefaultOpClass(Oid type_id, Oid am_id)
/*
* makeObjectName()
*
* Create a name for an implicitly created index, sequence, constraint, etc.
* Create a name for an implicitly created index, sequence, constraint,
* extended statistics, etc.
*
* The parameters are typically: the original table name, the original field
* name, and a "type" string (such as "seq" or "pkey"). The field name
@ -1981,6 +1982,8 @@ ChooseIndexName(const char *tabname, Oid namespaceId,
*
* We know that less than NAMEDATALEN characters will actually be used,
* so we can truncate the result once we've generated that many.
*
* XXX See also ChooseExtendedStatisticNameAddition.
*/
static char *
ChooseIndexNameAddition(List *colnames)