mirror of
https://github.com/HypoPG/hypopg
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2bd376d6bd
To avoid locking on pg_class (required to safely call GetNewOidWithIndex or similar) and to be usable on a standby node, use the oids unused in the FirstBootstrapObjectId / FirstNormalObjectId range rather than real oids. For performance, always start with the biggest oid lesser than FirstNormalObjectId. This way the loop to find an unused oid will only happens once a single backend has created more than ~2.5k hypothetical indexes. For people needing to have thousands of hypothetical indexes at the same time, we also allow to use the initial implementation that relies on real oids, which comes with all the limitations mentioned above, with the new hypopg.use_real_oids GUC.
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* hypopg.h: Implementation of hypothetical indexes for PostgreSQL
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*
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* This program is open source, licensed under the PostgreSQL license.
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* For license terms, see the LICENSE file.
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*
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* Copyright (C) 2015-2021: Julien Rouhaud
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef _HYPOPG_H_
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#define _HYPOPG_H_
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#if PG_VERSION_NUM >= 120000
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#include "access/table.h"
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#endif
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#include "catalog/catalog.h"
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#include "commands/explain.h"
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#include "nodes/nodeFuncs.h"
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#include "utils/memutils.h"
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#include "include/hypopg_import.h"
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/* Provide backward compatibility macros for table.c API on pre v12 versions */
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#if PG_VERSION_NUM < 120000
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#define table_open(r, l) heap_open(r, l)
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#define table_close(r, l) heap_close(r, l)
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#endif
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/*
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* Hacky macro to provide backward compatibility with either 1 or 2 arg lnext()
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* on pre v13 versions
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*/
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#if PG_VERSION_NUM < 130000
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#define LNEXT(_1, _2, NAME, ...) NAME
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#undef lnext
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#define lnext(...) LNEXT(__VA_ARGS__, LNEXT2, LNEXT1) (__VA_ARGS__)
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#define LNEXT1(lc) ((lc)->next)
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#define LNEXT2(list, lc) ((lc)->next)
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#endif
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/* Backport of atooid macro */
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#if PG_VERSION_NUM < 100000
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#define atooid(x) ((Oid) strtoul((x), NULL, 10))
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#endif
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extern bool isExplain;
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/* GUC for enabling / disabling hypopg during EXPLAIN */
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extern bool hypo_is_enabled;
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extern MemoryContext HypoMemoryContext;
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Oid hypo_getNewOid(Oid relid);
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void hypo_reset_fake_oids(void);
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#endif
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