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c7b8998ebb
Change pg_bsd_indent to follow upstream rules for placement of comments
to the right of code, and remove pgindent hack that caused comments
following #endif to not obey the general rule.
Commit e3860ffa4d wasn't actually using
the published version of pg_bsd_indent, but a hacked-up version that
tried to minimize the amount of movement of comments to the right of
code. The situation of interest is where such a comment has to be
moved to the right of its default placement at column 33 because there's
code there. BSD indent has always moved right in units of tab stops
in such cases --- but in the previous incarnation, indent was working
in 8-space tab stops, while now it knows we use 4-space tabs. So the
net result is that in about half the cases, such comments are placed
one tab stop left of before. This is better all around: it leaves
more room on the line for comment text, and it means that in such
cases the comment uniformly starts at the next 4-space tab stop after
the code, rather than sometimes one and sometimes two tabs after.
Also, ensure that comments following #endif are indented the same
as comments following other preprocessor commands such as #else.
That inconsistency turns out to have been self-inflicted damage
from a poorly-thought-through post-indent "fixup" in pgindent.
This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.
Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* statistics.h
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* Extended statistics and selectivity estimation functions.
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*
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* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/statistics/statistics.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef STATISTICS_H
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#define STATISTICS_H
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#include "commands/vacuum.h"
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#include "nodes/relation.h"
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#define STATS_MAX_DIMENSIONS 8 /* max number of attributes */
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/* Multivariate distinct coefficients */
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#define STATS_NDISTINCT_MAGIC 0xA352BFA4 /* struct identifier */
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#define STATS_NDISTINCT_TYPE_BASIC 1 /* struct version */
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/* MVDistinctItem represents a single combination of columns */
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typedef struct MVNDistinctItem
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{
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double ndistinct; /* ndistinct value for this combination */
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Bitmapset *attrs; /* attr numbers of items */
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} MVNDistinctItem;
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/* size of the struct, excluding attribute list */
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#define SizeOfMVNDistinctItem \
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(offsetof(MVNDistinctItem, ndistinct) + sizeof(double))
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/* A MVNDistinct object, comprising all possible combinations of columns */
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typedef struct MVNDistinct
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{
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uint32 magic; /* magic constant marker */
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uint32 type; /* type of ndistinct (BASIC) */
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uint32 nitems; /* number of items in the statistic */
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MVNDistinctItem items[FLEXIBLE_ARRAY_MEMBER];
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} MVNDistinct;
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/* size of the struct excluding the items array */
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#define SizeOfMVNDistinct (offsetof(MVNDistinct, nitems) + sizeof(uint32))
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/* size of the struct excluding the items array */
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#define SizeOfMVNDistinct (offsetof(MVNDistinct, nitems) + sizeof(uint32))
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#define STATS_DEPS_MAGIC 0xB4549A2C /* marks serialized bytea */
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#define STATS_DEPS_TYPE_BASIC 1 /* basic dependencies type */
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/*
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* Functional dependencies, tracking column-level relationships (values
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* in one column determine values in another one).
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*/
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typedef struct MVDependency
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{
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double degree; /* degree of validity (0-1) */
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AttrNumber nattributes; /* number of attributes */
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AttrNumber attributes[FLEXIBLE_ARRAY_MEMBER]; /* attribute numbers */
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} MVDependency;
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/* size of the struct excluding the deps array */
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#define SizeOfDependency \
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(offsetof(MVDependency, nattributes) + sizeof(AttrNumber))
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typedef struct MVDependencies
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{
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uint32 magic; /* magic constant marker */
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uint32 type; /* type of MV Dependencies (BASIC) */
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uint32 ndeps; /* number of dependencies */
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MVDependency *deps[FLEXIBLE_ARRAY_MEMBER]; /* dependencies */
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} MVDependencies;
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/* size of the struct excluding the deps array */
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#define SizeOfDependencies (offsetof(MVDependencies, ndeps) + sizeof(uint32))
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extern MVNDistinct *statext_ndistinct_load(Oid mvoid);
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extern MVDependencies *statext_dependencies_load(Oid mvoid);
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extern void BuildRelationExtStatistics(Relation onerel, double totalrows,
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int numrows, HeapTuple *rows,
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int natts, VacAttrStats **vacattrstats);
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extern bool statext_is_kind_built(HeapTuple htup, char kind);
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extern Selectivity dependencies_clauselist_selectivity(PlannerInfo *root,
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List *clauses,
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int varRelid,
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JoinType jointype,
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SpecialJoinInfo *sjinfo,
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RelOptInfo *rel,
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Bitmapset **estimatedclauses);
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extern bool has_stats_of_kind(List *stats, char requiredkind);
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extern StatisticExtInfo *choose_best_statistics(List *stats,
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Bitmapset *attnums, char requiredkind);
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#endif /* STATISTICS_H */
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