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authorgalaxycrab <UgnineSirdis@ydb.tech>2023-11-23 11:26:33 +0300
committergalaxycrab <UgnineSirdis@ydb.tech>2023-11-23 12:01:57 +0300
commit44354d0fc55926c1d4510d1d2c9c9f6a1a5e9300 (patch)
treecb4d75cd1c6dbc3da0ed927337fd8d1b6ed9da84 /contrib/libs/libpq/src/include/pg_config_manual.h
parent0e69bf615395fdd48ecee032faaec81bc468b0b8 (diff)
downloadydb-44354d0fc55926c1d4510d1d2c9c9f6a1a5e9300.tar.gz
YQ Connector:test INNER JOIN
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+/*------------------------------------------------------------------------
+ * PostgreSQL manual configuration settings
+ *
+ * This file contains various configuration symbols and limits. In
+ * all cases, changing them is only useful in very rare situations or
+ * for developers. If you edit any of these, be sure to do a *full*
+ * rebuild (and an initdb if noted).
+ *
+ * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/pg_config_manual.h
+ *------------------------------------------------------------------------
+ */
+
+/*
+ * This is the default value for wal_segment_size to be used when initdb is run
+ * without the --wal-segsize option. It must be a valid segment size.
+ */
+#define DEFAULT_XLOG_SEG_SIZE (16*1024*1024)
+
+/*
+ * Maximum length for identifiers (e.g. table names, column names,
+ * function names). Names actually are limited to one fewer byte than this,
+ * because the length must include a trailing zero byte.
+ *
+ * Changing this requires an initdb.
+ */
+#define NAMEDATALEN 64
+
+/*
+ * Maximum number of arguments to a function.
+ *
+ * The minimum value is 8 (GIN indexes use 8-argument support functions).
+ * The maximum possible value is around 600 (limited by index tuple size in
+ * pg_proc's index; BLCKSZ larger than 8K would allow more). Values larger
+ * than needed will waste memory and processing time, but do not directly
+ * cost disk space.
+ *
+ * Changing this does not require an initdb, but it does require a full
+ * backend recompile (including any user-defined C functions).
+ */
+#define FUNC_MAX_ARGS 100
+
+/*
+ * When creating a product derived from PostgreSQL with changes that cause
+ * incompatibilities for loadable modules, it is recommended to change this
+ * string so that dfmgr.c can refuse to load incompatible modules with a clean
+ * error message. Typical examples that cause incompatibilities are any
+ * changes to node tags or node structures. (Note that dfmgr.c already
+ * detects common sources of incompatibilities due to major version
+ * differences and due to some changed compile-time constants. This setting
+ * is for catching anything that cannot be detected in a straightforward way.)
+ *
+ * There is no prescribed format for the string. The suggestion is to include
+ * product or company name, and optionally any internally-relevant ABI
+ * version. Example: "ACME Postgres/1.2". Note that the string will appear
+ * in a user-facing error message if an ABI mismatch is detected.
+ */
+#define FMGR_ABI_EXTRA "PostgreSQL"
+
+/*
+ * Maximum number of columns in an index. There is little point in making
+ * this anything but a multiple of 32, because the main cost is associated
+ * with index tuple header size (see access/itup.h).
+ *
+ * Changing this requires an initdb.
+ */
+#define INDEX_MAX_KEYS 32
+
+/*
+ * Maximum number of columns in a partition key
+ */
+#define PARTITION_MAX_KEYS 32
+
+/*
+ * Decide whether built-in 8-byte types, including float8, int8, and
+ * timestamp, are passed by value. This is on by default if sizeof(Datum) >=
+ * 8 (that is, on 64-bit platforms). If sizeof(Datum) < 8 (32-bit platforms),
+ * this must be off. We keep this here as an option so that it is easy to
+ * test the pass-by-reference code paths on 64-bit platforms.
+ *
+ * Changing this requires an initdb.
+ */
+#if SIZEOF_VOID_P >= 8
+#define USE_FLOAT8_BYVAL 1
+#endif
+
+/*
+ * When we don't have native spinlocks, we use semaphores to simulate them.
+ * Decreasing this value reduces consumption of OS resources; increasing it
+ * may improve performance, but supplying a real spinlock implementation is
+ * probably far better.
+ */
+#define NUM_SPINLOCK_SEMAPHORES 128
+
+/*
+ * When we have neither spinlocks nor atomic operations support we're
+ * implementing atomic operations on top of spinlock on top of semaphores. To
+ * be safe against atomic operations while holding a spinlock separate
+ * semaphores have to be used.
+ */
+#define NUM_ATOMICS_SEMAPHORES 64
+
+/*
+ * MAXPGPATH: standard size of a pathname buffer in PostgreSQL (hence,
+ * maximum usable pathname length is one less).
+ *
+ * We'd use a standard system header symbol for this, if there weren't
+ * so many to choose from: MAXPATHLEN, MAX_PATH, PATH_MAX are all
+ * defined by different "standards", and often have different values
+ * on the same platform! So we just punt and use a reasonably
+ * generous setting here.
+ */
+#define MAXPGPATH 1024
+
+/*
+ * You can try changing this if you have a machine with bytes of
+ * another size, but no guarantee...
+ */
+#define BITS_PER_BYTE 8
+
+/*
+ * Preferred alignment for disk I/O buffers. On some CPUs, copies between
+ * user space and kernel space are significantly faster if the user buffer
+ * is aligned on a larger-than-MAXALIGN boundary. Ideally this should be
+ * a platform-dependent value, but for now we just hard-wire it.
+ */
+#define ALIGNOF_BUFFER 32
+
+/*
+ * If EXEC_BACKEND is defined, the postmaster uses an alternative method for
+ * starting subprocesses: Instead of simply using fork(), as is standard on
+ * Unix platforms, it uses fork()+exec() or something equivalent on Windows,
+ * as well as lots of extra code to bring the required global state to those
+ * new processes. This must be enabled on Windows (because there is no
+ * fork()). On other platforms, it's only useful for verifying those
+ * otherwise Windows-specific code paths.
+ */
+#if defined(WIN32) && !defined(__CYGWIN__)
+#define EXEC_BACKEND
+#endif
+
+/*
+ * USE_POSIX_FADVISE controls whether Postgres will attempt to use the
+ * posix_fadvise() kernel call. Usually the automatic configure tests are
+ * sufficient, but some older Linux distributions had broken versions of
+ * posix_fadvise(). If necessary you can remove the #define here.
+ */
+#if HAVE_DECL_POSIX_FADVISE && defined(HAVE_POSIX_FADVISE)
+#define USE_POSIX_FADVISE
+#endif
+
+/*
+ * USE_PREFETCH code should be compiled only if we have a way to implement
+ * prefetching. (This is decoupled from USE_POSIX_FADVISE because there
+ * might in future be support for alternative low-level prefetch APIs.
+ * If you change this, you probably need to adjust the error message in
+ * check_effective_io_concurrency.)
+ */
+#ifdef USE_POSIX_FADVISE
+#define USE_PREFETCH
+#endif
+
+/*
+ * Default and maximum values for backend_flush_after, bgwriter_flush_after
+ * and checkpoint_flush_after; measured in blocks. Currently, these are
+ * enabled by default if sync_file_range() exists, ie, only on Linux. Perhaps
+ * we could also enable by default if we have mmap and msync(MS_ASYNC)?
+ */
+#ifdef HAVE_SYNC_FILE_RANGE
+#define DEFAULT_BACKEND_FLUSH_AFTER 0 /* never enabled by default */
+#define DEFAULT_BGWRITER_FLUSH_AFTER 64
+#define DEFAULT_CHECKPOINT_FLUSH_AFTER 32
+#else
+#define DEFAULT_BACKEND_FLUSH_AFTER 0
+#define DEFAULT_BGWRITER_FLUSH_AFTER 0
+#define DEFAULT_CHECKPOINT_FLUSH_AFTER 0
+#endif
+/* upper limit for all three variables */
+#define WRITEBACK_MAX_PENDING_FLUSHES 256
+
+/*
+ * USE_SSL code should be compiled only when compiling with an SSL
+ * implementation.
+ */
+#ifdef USE_OPENSSL
+#define USE_SSL
+#endif
+
+/*
+ * This is the default directory in which AF_UNIX socket files are
+ * placed. Caution: changing this risks breaking your existing client
+ * applications, which are likely to continue to look in the old
+ * directory. But if you just hate the idea of sockets in /tmp,
+ * here's where to twiddle it. You can also override this at runtime
+ * with the postmaster's -k switch.
+ *
+ * If set to an empty string, then AF_UNIX sockets are not used by default: A
+ * server will not create an AF_UNIX socket unless the run-time configuration
+ * is changed, a client will connect via TCP/IP by default and will only use
+ * an AF_UNIX socket if one is explicitly specified.
+ *
+ * This is done by default on Windows because there is no good standard
+ * location for AF_UNIX sockets and many installations on Windows don't
+ * support them yet.
+ */
+#ifndef WIN32
+#define DEFAULT_PGSOCKET_DIR "/tmp"
+#else
+#define DEFAULT_PGSOCKET_DIR ""
+#endif
+
+/*
+ * This is the default event source for Windows event log.
+ */
+#define DEFAULT_EVENT_SOURCE "PostgreSQL"
+
+/*
+ * Assumed cache line size. This doesn't affect correctness, but can be used
+ * for low-level optimizations. Currently, this is used to pad some data
+ * structures in xlog.c, to ensure that highly-contended fields are on
+ * different cache lines. Too small a value can hurt performance due to false
+ * sharing, while the only downside of too large a value is a few bytes of
+ * wasted memory. The default is 128, which should be large enough for all
+ * supported platforms.
+ */
+#define PG_CACHE_LINE_SIZE 128
+
+/*
+ * Assumed alignment requirement for direct I/O. 4K corresponds to common
+ * sector and memory page size.
+ */
+#define PG_IO_ALIGN_SIZE 4096
+
+/*
+ *------------------------------------------------------------------------
+ * The following symbols are for enabling debugging code, not for
+ * controlling user-visible features or resource limits.
+ *------------------------------------------------------------------------
+ */
+
+/*
+ * Include Valgrind "client requests", mostly in the memory allocator, so
+ * Valgrind understands PostgreSQL memory contexts. This permits detecting
+ * memory errors that Valgrind would not detect on a vanilla build. It also
+ * enables detection of buffer accesses that take place without holding a
+ * buffer pin (or without holding a buffer lock in the case of index access
+ * methods that superimpose their own custom client requests on top of the
+ * generic bufmgr.c requests).
+ *
+ * "make installcheck" is significantly slower under Valgrind. The client
+ * requests fall in hot code paths, so USE_VALGRIND slows execution by a few
+ * percentage points even when not run under Valgrind.
+ *
+ * Do not try to test the server under Valgrind without having built the
+ * server with USE_VALGRIND; else you will get false positives from sinval
+ * messaging (see comments in AddCatcacheInvalidationMessage). It's also
+ * important to use the suppression file src/tools/valgrind.supp to
+ * exclude other known false positives.
+ *
+ * You should normally use MEMORY_CONTEXT_CHECKING with USE_VALGRIND;
+ * instrumentation of repalloc() is inferior without it.
+ */
+/* #define USE_VALGRIND */
+
+/*
+ * Define this to cause pfree()'d memory to be cleared immediately, to
+ * facilitate catching bugs that refer to already-freed values.
+ * Right now, this gets defined automatically if --enable-cassert.
+ */
+#ifdef USE_ASSERT_CHECKING
+#define CLOBBER_FREED_MEMORY
+#endif
+
+/*
+ * Define this to check memory allocation errors (scribbling on more
+ * bytes than were allocated). Right now, this gets defined
+ * automatically if --enable-cassert or USE_VALGRIND.
+ */
+#if defined(USE_ASSERT_CHECKING) || defined(USE_VALGRIND)
+#define MEMORY_CONTEXT_CHECKING
+#endif
+
+/*
+ * Define this to cause palloc()'d memory to be filled with random data, to
+ * facilitate catching code that depends on the contents of uninitialized
+ * memory. Caution: this is horrendously expensive.
+ */
+/* #define RANDOMIZE_ALLOCATED_MEMORY */
+
+/*
+ * For cache-invalidation debugging, define DISCARD_CACHES_ENABLED to enable
+ * use of the debug_discard_caches GUC to aggressively flush syscache/relcache
+ * entries whenever it's possible to deliver invalidations. See
+ * AcceptInvalidationMessages() in src/backend/utils/cache/inval.c for
+ * details.
+ *
+ * USE_ASSERT_CHECKING builds default to enabling this. It's possible to use
+ * DISCARD_CACHES_ENABLED without a cassert build and the implied
+ * CLOBBER_FREED_MEMORY and MEMORY_CONTEXT_CHECKING options, but it's unlikely
+ * to be as effective at identifying problems.
+ */
+/* #define DISCARD_CACHES_ENABLED */
+
+#if defined(USE_ASSERT_CHECKING) && !defined(DISCARD_CACHES_ENABLED)
+#define DISCARD_CACHES_ENABLED
+#endif
+
+/*
+ * Backwards compatibility for the older compile-time-only clobber-cache
+ * macros.
+ */
+#if !defined(DISCARD_CACHES_ENABLED) && (defined(CLOBBER_CACHE_ALWAYS) || defined(CLOBBER_CACHE_RECURSIVELY))
+#define DISCARD_CACHES_ENABLED
+#endif
+
+/*
+ * Recover memory used for relcache entries when invalidated. See
+ * RelationBuildDesc() in src/backend/utils/cache/relcache.c.
+ *
+ * This is active automatically for clobber-cache builds when clobbering is
+ * active, but can be overridden here by explicitly defining
+ * RECOVER_RELATION_BUILD_MEMORY. Define to 1 to always free relation cache
+ * memory even when clobber is off, or to 0 to never free relation cache
+ * memory even when clobbering is on.
+ */
+ /* #define RECOVER_RELATION_BUILD_MEMORY 0 */ /* Force disable */
+ /* #define RECOVER_RELATION_BUILD_MEMORY 1 */ /* Force enable */
+
+/*
+ * Define this to force all parse and plan trees to be passed through
+ * copyObject(), to facilitate catching errors and omissions in
+ * copyObject().
+ */
+/* #define COPY_PARSE_PLAN_TREES */
+
+/*
+ * Define this to force all parse and plan trees to be passed through
+ * outfuncs.c/readfuncs.c, to facilitate catching errors and omissions in
+ * those modules.
+ */
+/* #define WRITE_READ_PARSE_PLAN_TREES */
+
+/*
+ * Define this to force all raw parse trees for DML statements to be scanned
+ * by raw_expression_tree_walker(), to facilitate catching errors and
+ * omissions in that function.
+ */
+/* #define RAW_EXPRESSION_COVERAGE_TEST */
+
+/*
+ * Enable debugging print statements for lock-related operations.
+ */
+/* #define LOCK_DEBUG */
+
+/*
+ * Enable debugging print statements for WAL-related operations; see
+ * also the wal_debug GUC var.
+ */
+/* #define WAL_DEBUG */
+
+/*
+ * Enable tracing of resource consumption during sort operations;
+ * see also the trace_sort GUC var. For 8.1 this is enabled by default.
+ */
+#define TRACE_SORT 1
+
+/*
+ * Enable tracing of syncscan operations (see also the trace_syncscan GUC var).
+ */
+/* #define TRACE_SYNCSCAN */