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pgindent run for 9.5

This commit is contained in:
Bruce Momjian
2015-05-23 21:35:49 -04:00
parent 225892552b
commit 807b9e0dff
414 changed files with 5810 additions and 5308 deletions

View File

@@ -100,18 +100,18 @@ typedef struct SortSupportData
* INT_MIN, as callers are allowed to negate the result before using it.
*
* This may be either the authoritative comparator, or the abbreviated
* comparator. Core code may switch this over the initial preference of an
* opclass support function despite originally indicating abbreviation was
* applicable, by assigning the authoritative comparator back.
* comparator. Core code may switch this over the initial preference of
* an opclass support function despite originally indicating abbreviation
* was applicable, by assigning the authoritative comparator back.
*/
int (*comparator) (Datum x, Datum y, SortSupport ssup);
/*
* "Abbreviated key" infrastructure follows.
*
* All callbacks must be set by sortsupport opclasses that make use of this
* optional additional infrastructure (unless for whatever reasons the
* opclass doesn't proceed with abbreviation, in which case
* All callbacks must be set by sortsupport opclasses that make use of
* this optional additional infrastructure (unless for whatever reasons
* the opclass doesn't proceed with abbreviation, in which case
* abbrev_converter must not be set).
*
* This allows opclass authors to supply a conversion routine, used to
@@ -120,20 +120,20 @@ typedef struct SortSupportData
* pass-by-value Datum format that only the opclass has knowledge of. An
* alternative comparator, used only with this alternative representation
* must also be provided (which is assigned to "comparator"). This
* representation is a simple approximation of the original Datum. It must
* be possible to compare datums of this representation with each other
* using the supplied alternative comparator, and have any non-zero return
* value be a reliable proxy for what a proper comparison would indicate.
* Returning zero from the alternative comparator does not indicate
* equality, as with a conventional support routine 1, though -- it
* indicates that it wasn't possible to determine how the two abbreviated
* values compared. A proper comparison, using "abbrev_full_comparator"/
* ApplySortAbbrevFullComparator() is therefore required. In many cases
* this results in most or all comparisons only using the cheap alternative
* comparison func, which is typically implemented as code that compiles to
* just a few CPU instructions. CPU cache miss penalties are expensive; to
* get good overall performance, sort infrastructure must heavily weigh
* cache performance.
* representation is a simple approximation of the original Datum. It
* must be possible to compare datums of this representation with each
* other using the supplied alternative comparator, and have any non-zero
* return value be a reliable proxy for what a proper comparison would
* indicate. Returning zero from the alternative comparator does not
* indicate equality, as with a conventional support routine 1, though --
* it indicates that it wasn't possible to determine how the two
* abbreviated values compared. A proper comparison, using
* "abbrev_full_comparator"/ ApplySortAbbrevFullComparator() is therefore
* required. In many cases this results in most or all comparisons only
* using the cheap alternative comparison func, which is typically
* implemented as code that compiles to just a few CPU instructions. CPU
* cache miss penalties are expensive; to get good overall performance,
* sort infrastructure must heavily weigh cache performance.
*
* Opclass authors must consider the final cardinality of abbreviated keys
* when devising an encoding scheme. It's possible for a strategy to work
@@ -143,16 +143,16 @@ typedef struct SortSupportData
*/
/*
* "abbreviate" concerns whether or not the abbreviated key optimization is
* applicable in principle (that is, the sortsupport routine needs to know
* if its dealing with a key where an abbreviated representation can
* "abbreviate" concerns whether or not the abbreviated key optimization
* is applicable in principle (that is, the sortsupport routine needs to
* know if its dealing with a key where an abbreviated representation can
* usefully be packed together. Conventionally, this is the leading
* attribute key). Note, however, that in order to determine that
* abbreviation is not in play, the core code always checks whether or not
* the opclass has set abbrev_converter. This is a one way, one time
* message to the opclass.
*/
bool abbreviate;
bool abbreviate;
/*
* Converter to abbreviated format, from original representation. Core
@@ -161,24 +161,25 @@ typedef struct SortSupportData
* guaranteed NOT NULL, because it doesn't make sense to factor NULLness
* into ad-hoc cost model.
*
* abbrev_converter is tested to see if abbreviation is in play. Core code
* may set it to NULL to indicate abbreviation should not be used (which is
* something sortsupport routines need not concern themselves with).
* However, sortsupport routines must not set it when it is immediately
* established that abbreviation should not proceed (e.g., for !abbreviate
* calls, or due to platform-specific impediments to using abbreviation).
* abbrev_converter is tested to see if abbreviation is in play. Core
* code may set it to NULL to indicate abbreviation should not be used
* (which is something sortsupport routines need not concern themselves
* with). However, sortsupport routines must not set it when it is
* immediately established that abbreviation should not proceed (e.g., for
* !abbreviate calls, or due to platform-specific impediments to using
* abbreviation).
*/
Datum (*abbrev_converter) (Datum original, SortSupport ssup);
Datum (*abbrev_converter) (Datum original, SortSupport ssup);
/*
* abbrev_abort callback allows clients to verify that the current strategy
* is working out, using a sortsupport routine defined ad-hoc cost model.
* If there is a lot of duplicate abbreviated keys in practice, it's useful
* to be able to abandon the strategy before paying too high a cost in
* conversion (perhaps certain opclass-specific adaptations are useful
* too).
* abbrev_abort callback allows clients to verify that the current
* strategy is working out, using a sortsupport routine defined ad-hoc
* cost model. If there is a lot of duplicate abbreviated keys in
* practice, it's useful to be able to abandon the strategy before paying
* too high a cost in conversion (perhaps certain opclass-specific
* adaptations are useful too).
*/
bool (*abbrev_abort) (int memtupcount, SortSupport ssup);
bool (*abbrev_abort) (int memtupcount, SortSupport ssup);
/*
* Full, authoritative comparator for key that an abbreviated
@@ -200,8 +201,8 @@ extern int ApplySortComparator(Datum datum1, bool isNull1,
Datum datum2, bool isNull2,
SortSupport ssup);
extern int ApplySortAbbrevFullComparator(Datum datum1, bool isNull1,
Datum datum2, bool isNull2,
SortSupport ssup);
Datum datum2, bool isNull2,
SortSupport ssup);
#endif /* !PG_USE_INLINE */
#if defined(PG_USE_INLINE) || defined(SORTSUPPORT_INCLUDE_DEFINITIONS)
/*
@@ -284,6 +285,6 @@ ApplySortAbbrevFullComparator(Datum datum1, bool isNull1,
extern void PrepareSortSupportComparisonShim(Oid cmpFunc, SortSupport ssup);
extern void PrepareSortSupportFromOrderingOp(Oid orderingOp, SortSupport ssup);
extern void PrepareSortSupportFromIndexRel(Relation indexRel, int16 strategy,
SortSupport ssup);
SortSupport ssup);
#endif /* SORTSUPPORT_H */