Tom Lane 6286526207 Fix compute_scalar_stats() for case that all values exceed WIDTH_THRESHOLD. ...

The standard typanalyze functions skip over values whose detoasted size
exceeds WIDTH_THRESHOLD (1024 bytes), so as to limit memory bloat during
ANALYZE.  However, we (I think I, actually :-() failed to consider the
possibility that *every* non-null value in a column is too wide.  While
compute_minimal_stats() seems to behave reasonably anyway in such a case,
compute_scalar_stats() just fell through and generated no pg_statistic
entry at all.  That's unnecessarily pessimistic: we can still produce
valid stanullfrac and stawidth values in such cases, since we do include
too-wide values in the average-width calculation.  Furthermore, since the
general assumption in this code is that too-wide values are probably all
distinct from each other, it seems reasonable to set stadistinct to -1
("all distinct").

Per complaint from Kadri Raudsepp.  This has been like this since roughly
neolithic times, so back-patch to all supported branches.

2014-01-11 13:42:42 -05:00

..

aggregatecmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

alter.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

analyze.c

Fix compute_scalar_stats() for case that all values exceed WIDTH_THRESHOLD.

2014-01-11 13:42:42 -05:00

async.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

cluster.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

collationcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

comment.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

constraint.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

conversioncmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

copy.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

createas.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

dbcommands.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

define.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

discard.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

dropcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

event_trigger.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

explain.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

extension.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

foreigncmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

functioncmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

indexcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

lockcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

Makefile

Add a materialized view relations.

2013-03-03 18:23:31 -06:00

matview.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

opclasscmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

operatorcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

portalcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

prepare.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

proclang.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

schemacmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

seclabel.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

sequence.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

tablecmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

tablespace.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

trigger.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

tsearchcmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

typecmds.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

user.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

vacuum.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

vacuumlazy.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

variable.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00

view.c

Update copyright for 2014

2014-01-07 16:05:30 -05:00