brin.h File Reference

#include "nodes/execnodes.h"
#include "storage/shm_toc.h"
#include "utils/relcache.h"

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Data Structures
struct	BrinOptions
struct	BrinStatsData

Macros
#define	BRIN_DEFAULT_PAGES_PER_RANGE   128
#define	BrinGetPagesPerRange(relation)
#define	BrinGetAutoSummarize(relation)

Typedefs
typedef struct BrinOptions	BrinOptions
typedef struct BrinStatsData	BrinStatsData

Functions
void	brinGetStats (Relation index, BrinStatsData *stats)
void	_brin_parallel_build_main (dsm_segment *seg, shm_toc *toc)

Macro Definition Documentation

BRIN_DEFAULT_PAGES_PER_RANGE

#define BRIN_DEFAULT_PAGES_PER_RANGE   128

Definition at line 39 of file brin.h.

BrinGetAutoSummarize

#define BrinGetAutoSummarize

(

relation

)

Value:

    (AssertMacro(relation->rd_rel->relkind == RELKIND_INDEX && \
                 relation->rd_rel->relam == BRIN_AM_OID), \
     (relation)->rd_options ? \
     ((BrinOptions *) (relation)->rd_options)->autosummarize : \
      false)

Definition at line 46 of file brin.h.

BrinGetPagesPerRange

#define BrinGetPagesPerRange

(

relation

)

Value:

    (AssertMacro(relation->rd_rel->relkind == RELKIND_INDEX && \
                 relation->rd_rel->relam == BRIN_AM_OID), \
     (relation)->rd_options ? \
     ((BrinOptions *) (relation)->rd_options)->pagesPerRange : \
      BRIN_DEFAULT_PAGES_PER_RANGE)

Definition at line 40 of file brin.h.

Typedef Documentation

BrinOptions

typedef struct BrinOptions BrinOptions

BrinStatsData

typedef struct BrinStatsData BrinStatsData

Function Documentation

_brin_parallel_build_main()

void _brin_parallel_build_main	(	dsm_segment *	seg,
		shm_toc *	toc
	)

Definition at line 2863 of file brin.c.

{
    char       *sharedquery;
    BrinShared *brinshared;
    Sharedsort *sharedsort;
    BrinBuildState *buildstate;
    Relation    heapRel;
    Relation    indexRel;
    LOCKMODE    heapLockmode;
    LOCKMODE    indexLockmode;
    WalUsage   *walusage;
    BufferUsage *bufferusage;
    int         sortmem;
 
    /*
     * The only possible status flag that can be set to the parallel worker is
     * PROC_IN_SAFE_IC.
     */
    Assert((MyProc->statusFlags == 0) ||
           (MyProc->statusFlags == PROC_IN_SAFE_IC));
 
    /* Set debug_query_string for individual workers first */
    sharedquery = shm_toc_lookup(toc, PARALLEL_KEY_QUERY_TEXT, true);
    debug_query_string = sharedquery;
 
    /* Report the query string from leader */
    pgstat_report_activity(STATE_RUNNING, debug_query_string);
 
    /* Look up brin shared state */
    brinshared = shm_toc_lookup(toc, PARALLEL_KEY_BRIN_SHARED, false);
 
    /* Open relations using lock modes known to be obtained by index.c */
    if (!brinshared->isconcurrent)
    {
        heapLockmode = ShareLock;
        indexLockmode = AccessExclusiveLock;
    }
    else
    {
        heapLockmode = ShareUpdateExclusiveLock;
        indexLockmode = RowExclusiveLock;
    }
 
    /* Track query ID */
    pgstat_report_query_id(brinshared->queryid, false);
 
    /* Open relations within worker */
    heapRel = table_open(brinshared->heaprelid, heapLockmode);
    indexRel = index_open(brinshared->indexrelid, indexLockmode);
 
    buildstate = initialize_brin_buildstate(indexRel, NULL,
                                            brinshared->pagesPerRange,
                                            InvalidBlockNumber);
 
    /* Look up shared state private to tuplesort.c */
    sharedsort = shm_toc_lookup(toc, PARALLEL_KEY_TUPLESORT, false);
    tuplesort_attach_shared(sharedsort, seg);
 
    /* Prepare to track buffer usage during parallel execution */
    InstrStartParallelQuery();
 
    /*
     * Might as well use reliable figure when doling out maintenance_work_mem
     * (when requested number of workers were not launched, this will be
     * somewhat higher than it is for other workers).
     */
    sortmem = maintenance_work_mem / brinshared->scantuplesortstates;
 
    _brin_parallel_scan_and_build(buildstate, brinshared, sharedsort,
                                  heapRel, indexRel, sortmem, false);
 
    /* Report WAL/buffer usage during parallel execution */
    bufferusage = shm_toc_lookup(toc, PARALLEL_KEY_BUFFER_USAGE, false);
    walusage = shm_toc_lookup(toc, PARALLEL_KEY_WAL_USAGE, false);
    InstrEndParallelQuery(&bufferusage[ParallelWorkerNumber],
                          &walusage[ParallelWorkerNumber]);
 
    index_close(indexRel, indexLockmode);
    table_close(heapRel, heapLockmode);
}

References _brin_parallel_scan_and_build(), AccessExclusiveLock, Assert(), debug_query_string, BrinShared::heaprelid, index_close(), index_open(), BrinShared::indexrelid, initialize_brin_buildstate(), InstrEndParallelQuery(), InstrStartParallelQuery(), InvalidBlockNumber, BrinShared::isconcurrent, maintenance_work_mem, MyProc, BrinShared::pagesPerRange, PARALLEL_KEY_BRIN_SHARED, PARALLEL_KEY_BUFFER_USAGE, PARALLEL_KEY_QUERY_TEXT, PARALLEL_KEY_TUPLESORT, PARALLEL_KEY_WAL_USAGE, ParallelWorkerNumber, pgstat_report_activity(), pgstat_report_query_id(), PROC_IN_SAFE_IC, BrinShared::queryid, RowExclusiveLock, BrinShared::scantuplesortstates, ShareLock, ShareUpdateExclusiveLock, shm_toc_lookup(), STATE_RUNNING, PGPROC::statusFlags, table_close(), table_open(), and tuplesort_attach_shared().

brinGetStats()

void brinGetStats	(	Relation	index,
		BrinStatsData *	stats
	)

Definition at line 1648 of file brin.c.

{
    Buffer      metabuffer;
    Page        metapage;
    BrinMetaPageData *metadata;
 
    metabuffer = ReadBuffer(index, BRIN_METAPAGE_BLKNO);
    LockBuffer(metabuffer, BUFFER_LOCK_SHARE);
    metapage = BufferGetPage(metabuffer);
    metadata = (BrinMetaPageData *) PageGetContents(metapage);
 
    stats->pagesPerRange = metadata->pagesPerRange;
    stats->revmapNumPages = metadata->lastRevmapPage - 1;
 
    UnlockReleaseBuffer(metabuffer);
}

References BRIN_METAPAGE_BLKNO, BUFFER_LOCK_SHARE, BufferGetPage(), BrinMetaPageData::lastRevmapPage, LockBuffer(), PageGetContents(), BrinStatsData::pagesPerRange, BrinMetaPageData::pagesPerRange, ReadBuffer(), BrinStatsData::revmapNumPages, and UnlockReleaseBuffer().

Referenced by brincostestimate().