From 46651ce6fe013220ed397add242004d764fc0153 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 14:15:05 +0200 Subject: Adding upstream version 14.5. Signed-off-by: Daniel Baumann --- src/include/utils/sharedtuplestore.h | 61 ++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 src/include/utils/sharedtuplestore.h (limited to 'src/include/utils/sharedtuplestore.h') diff --git a/src/include/utils/sharedtuplestore.h b/src/include/utils/sharedtuplestore.h new file mode 100644 index 0000000..01ad6ef --- /dev/null +++ b/src/include/utils/sharedtuplestore.h @@ -0,0 +1,61 @@ +/*------------------------------------------------------------------------- + * + * sharedtuplestore.h + * Simple mechanism for sharing tuples between backends. + * + * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * src/include/utils/sharedtuplestore.h + * + *------------------------------------------------------------------------- + */ +#ifndef SHAREDTUPLESTORE_H +#define SHAREDTUPLESTORE_H + +#include "access/htup.h" +#include "storage/fd.h" +#include "storage/sharedfileset.h" + +struct SharedTuplestore; +typedef struct SharedTuplestore SharedTuplestore; + +struct SharedTuplestoreAccessor; +typedef struct SharedTuplestoreAccessor SharedTuplestoreAccessor; + +/* + * A flag indicating that the tuplestore will only be scanned once, so backing + * files can be unlinked early. + */ +#define SHARED_TUPLESTORE_SINGLE_PASS 0x01 + +extern size_t sts_estimate(int participants); + +extern SharedTuplestoreAccessor *sts_initialize(SharedTuplestore *sts, + int participants, + int my_participant_number, + size_t meta_data_size, + int flags, + SharedFileSet *fileset, + const char *name); + +extern SharedTuplestoreAccessor *sts_attach(SharedTuplestore *sts, + int my_participant_number, + SharedFileSet *fileset); + +extern void sts_end_write(SharedTuplestoreAccessor *accessor); + +extern void sts_reinitialize(SharedTuplestoreAccessor *accessor); + +extern void sts_begin_parallel_scan(SharedTuplestoreAccessor *accessor); + +extern void sts_end_parallel_scan(SharedTuplestoreAccessor *accessor); + +extern void sts_puttuple(SharedTuplestoreAccessor *accessor, + void *meta_data, + MinimalTuple tuple); + +extern MinimalTuple sts_parallel_scan_next(SharedTuplestoreAccessor *accessor, + void *meta_data); + +#endif /* SHAREDTUPLESTORE_H */ -- cgit v1.2.3