Add the SQLITE_OMIT_TRUNCATE_OPTIMIZATION option. Other unrelated
documentation enhancements. (CVS 5798) FossilOrigin-Name: fab4940d54fd1e5459a3d0d9b64b491e6972fd8d
This commit is contained in:
drh
parent
49ffdbf47e
commit
f8cecdab84
18
manifest
18
manifest
@ -1,5 +1,5 @@
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C Further\ssimplifications\sof\sthe\scode\sfor\sthe\sLIMIT\sclause\son\san\sUPDATE\sor\sDELETE.\s\sAdded\sa\sfew\stest\scases\sto\swherelimit.test.\s(CVS\s5797)
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D 2008-10-10T18:25:46
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C Add\sthe\sSQLITE_OMIT_TRUNCATE_OPTIMIZATION\soption.\s\sOther\sunrelated\ndocumentation\senhancements.\s(CVS\s5798)
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D 2008-10-10T23:48:26
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F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
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F Makefile.in 7fc26e087207e7a4a7723583dbd7997477af3b13
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F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
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@ -106,7 +106,7 @@ F src/build.c 8714bd809583bbe07bf22d0e1808a3fc31abe330
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F src/callback.c e970e5beddbdb23f89a6d05cb1a6419d9f755624
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F src/complete.c cb14e06dbe79dee031031f0d9e686ff306afe07c
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F src/date.c 1b1fc801df40aae891bff8b03f65313df192d677
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F src/delete.c c7aaf47f274494f9ae1f89cf095ca890b1d9d2bf
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F src/delete.c d3f2adfdd07e701115a111cc81dca33ed6039d10
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F src/expr.c 0ceafeff3a4e0f460d6a7695a675ae12391e313d
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F src/fault.c dc88c821842157460750d2d61a8a8b4197d047ff
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F src/func.c 8431b40a7843d1024145684d303c55b4ee087bbe
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@ -150,7 +150,7 @@ F src/random.c a87afbd598aa877e23ac676ee92fd8ee5c786a51
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F src/resolve.c d45e7b69f9ff653799384d7fcdd0c8d7096908b7
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F src/select.c d910d7350df0d918e22286c5bfd39d4ea68ec813
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F src/shell.c d83b578a8ccdd3e0e7fef4388a0887ce9f810967
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F src/sqlite.h.in 28e6466da6b90e56bfbc6c50a1a281931a8c733c
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F src/sqlite.h.in 2b8ef43244589ef2d8060b076adaafacda58acf8
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F src/sqlite3ext.h 1e3887c9bd3ae66cb599e922824b04cd0d0f2c3e
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F src/sqliteInt.h f60fac64c8970ca366080daa3aa65b9a54a2334a
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F src/sqliteLimit.h f435e728c6b620ef7312814d660a81f9356eb5c8
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@ -169,7 +169,7 @@ F src/test9.c 904ebe0ed1472d6bad17a81e2ecbfc20017dc237
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F src/test_async.c 45024094ed7cf780c5d5dccda645145f95cf78ef
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F src/test_autoext.c f53b0cdf7bf5f08100009572a5d65cdb540bd0ad
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F src/test_btree.c d7b8716544611c323860370ee364e897c861f1b0
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F src/test_config.c e5d6390729f0c63333ebe7e5927c07e50bc9deea
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F src/test_config.c 91ae677efad9ee440ea42565ec675f204dd5fb3a
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F src/test_devsym.c 802d10e65b4217208cb47059b84adf46318bcdf4
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F src/test_func.c a55c4d5479ff2eb5c0a22d4d88e9528ab59c953b
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F src/test_hexio.c 2f1122aa3f012fa0142ee3c36ce5c902a70cd12f
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@ -648,7 +648,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
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F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
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F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
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F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
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P 84e73fe8a6f538c4b1bb4f641a661d6fafb60c76
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R eb4c22bf5cef8091ed9bce14d73bbe63
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U shane
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Z 9ca81fedb812b2854e888eab6c64b7ec
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P 282c6a46b25f4e4278fd4c8b0b1cde1de28d8f51
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R 6ffb2f1fe0d56d1b89a5f8c7d49a18a5
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U drh
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Z e18361551100757c34ff8614b91b50fa
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@ -1 +1 @@
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282c6a46b25f4e4278fd4c8b0b1cde1de28d8f51
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fab4940d54fd1e5459a3d0d9b64b491e6972fd8d
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@ -12,7 +12,7 @@
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** This file contains C code routines that are called by the parser
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** in order to generate code for DELETE FROM statements.
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**
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** $Id: delete.c,v 1.181 2008/10/10 18:25:46 shane Exp $
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** $Id: delete.c,v 1.182 2008/10/10 23:48:26 drh Exp $
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*/
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#include "sqliteInt.h"
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@ -364,6 +364,7 @@ void sqlite3DeleteFrom(
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sqlite3VdbeAddOp2(v, OP_Integer, 0, memCnt);
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}
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#ifndef SQLITE_OMIT_TRUNCATE_OPTIMIZATION
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/* Special case: A DELETE without a WHERE clause deletes everything.
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** It is easier just to erase the whole table. Note, however, that
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** this means that the row change count will be incorrect.
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@ -391,11 +392,12 @@ void sqlite3DeleteFrom(
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sqlite3VdbeAddOp2(v, OP_Clear, pIdx->tnum, iDb);
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}
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}
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}
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}else
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#endif /* SQLITE_OMIT_TRUNCATE_OPTIMIZATION */
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/* The usual case: There is a WHERE clause so we have to scan through
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** the table and pick which records to delete.
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*/
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else{
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{
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int iRowid = ++pParse->nMem; /* Used for storing rowid values. */
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/* Begin the database scan
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125
src/sqlite.h.in
125
src/sqlite.h.in
@ -30,7 +30,7 @@
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** the version number) and changes its name to "sqlite3.h" as
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** part of the build process.
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**
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** @(#) $Id: sqlite.h.in,v 1.402 2008/10/10 17:26:35 drh Exp $
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** @(#) $Id: sqlite.h.in,v 1.403 2008/10/10 23:48:26 drh Exp $
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*/
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#ifndef _SQLITE3_H_
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#define _SQLITE3_H_
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@ -983,95 +983,97 @@ int sqlite3_os_end(void);
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**
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** INVARIANTS:
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**
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** {H14103} A successful invocation of sqlite3_config() shall return
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** SQLITE_OK.
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** {H14103} A successful invocation of [sqlite3_config()] shall return
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** [SQLITE_OK].
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**
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** {H14106} The sqlite3_config() interface shall return SQLITE_MISUSE
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** if it is invoked in between calls to sqlite3_initialize() and
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** sqlite3_shutdown().
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** {H14106} The [sqlite3_config()] interface shall return [SQLITE_MISUSE]
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** if it is invoked in between calls to [sqlite3_initialize()] and
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** [sqlite3_shutdown()].
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**
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** {H14120} A successful call to sqlite3_config(SQLITE_CONFIG_SINGLETHREAD)
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** {H14120} A successful call to [sqlite3_config]([SQLITE_CONFIG_SINGLETHREAD])
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** shall set the default [threading mode] to Single-thread.
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**
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** {H14123} A successful call to sqlite3_config(SQLITE_CONFIG_MULTITHREAD)
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** {H14123} A successful call to [sqlite3_config]([SQLITE_CONFIG_MULTITHREAD])
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** shall set the default [threading mode] to Multi-thread.
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**
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** {H14126} A successful call to sqlite3_config(SQLITE_CONFIG_SERIALIZED)
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** {H14126} A successful call to [sqlite3_config]([SQLITE_CONFIG_SERIALIZED])
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** shall set the default [threading mode] to Serialized.
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**
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** {H14129} A successful call to sqlite3_config(SQLITE_CONFIG_MUTEX,X)
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** {H14129} A successful call to [sqlite3_config]([SQLITE_CONFIG_MUTEX],X)
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** where X is a pointer to an initialized [sqlite3_mutex_methods]
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** object shall cause all subsequent mutex operations performed
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** by SQLite to use the mutex methods that were present in X
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** during the call to sqlite3_config().
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** during the call to [sqlite3_config()].
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**
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** {H14132} A successful call to sqlite3_config(SQLITE_CONFIG_GETMUTEX,X)
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** {H14132} A successful call to [sqlite3_config]([SQLITE_CONFIG_GETMUTEX],X)
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** where X is a pointer to an [sqlite3_mutex_methods] object
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** shall overwrite the content of [sqlite3_mutex_methods] object
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** with the mutex methods currently in use by SQLite.
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**
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** {H14135} A successful call to sqlite3_config(SQLITE_CONFIG_MALLOC,M)
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** {H14135} A successful call to [sqlite3_config]([SQLITE_CONFIG_MALLOC],M)
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** where M is a pointer to an initialized [sqlite3_mem_methods]
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** object shall cause all subsequent memory allocation operations
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** performed by SQLite to use the methods that were present in
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** M during the call to sqlite3_config().
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** M during the call to [sqlite3_config()].
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**
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** {H14138} A successful call to sqlite3_config(SQLITE_CONFIG_GETMALLOC,M)
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** {H14138} A successful call to [sqlite3_config]([SQLITE_CONFIG_GETMALLOC],M)
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** where M is a pointer to an [sqlite3_mem_methods] object shall
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** overwrite the content of [sqlite3_mem_methods] object with
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** the memory allocation methods currently in use by
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** SQLite.
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**
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** {H14141} A successful call to sqlite3_config(SQLITE_CONFIG_MEMSTATUS,1)
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** {H14141} A successful call to [sqlite3_config]([SQLITE_CONFIG_MEMSTATUS],1)
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** shall enable the memory allocation status collection logic.
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**
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** {H14144} A successful call to sqlite3_config(SQLITE_CONFIG_MEMSTATUS,0)
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** {H14144} A successful call to [sqlite3_config]([SQLITE_CONFIG_MEMSTATUS],0)
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** shall disable the memory allocation status collection logic.
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**
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** {H14147} The memory allocation status collection logic shall be
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** enabled by default.
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**
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** {H14150} A successful call to sqlite3_config(SQLITE_CONFIG_SCRATCH,S,Z,N)
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** {H14150} A successful call to [sqlite3_config]([SQLITE_CONFIG_SCRATCH],S,Z,N)
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** where Z and N are non-negative integers and
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** S is a pointer to an aligned memory buffer not less than
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** Z*N bytes in size shall cause S to be used by the
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** [scratch memory allocator] for as many as N simulataneous
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** allocations each of size Z.
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**
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** {H14153} A successful call to sqlite3_config(SQLITE_CONFIG_SCRATCH,S,Z,N)
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** {H14153} A successful call to [sqlite3_config]([SQLITE_CONFIG_SCRATCH],S,Z,N)
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** where S is a NULL pointer shall disable the
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** [scratch memory allocator].
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**
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** {H14156} A successful call to sqlite3_config(SQLITE_CONFIG_PAGECACHE,S,Z,N)
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** {H14156} A successful call to
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** [sqlite3_config]([SQLITE_CONFIG_PAGECACHE],S,Z,N)
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** where Z and N are non-negative integers and
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** S is a pointer to an aligned memory buffer not less than
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** Z*N bytes in size shall cause S to be used by the
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** [pagecache memory allocator] for as many as N simulataneous
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** allocations each of size Z.
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**
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** {H14159} A successful call to sqlite3_config(SQLITE_CONFIG_PAGECACHE,S,Z,N)
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** {H14159} A successful call to
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** [sqlite3_config]([SQLITE_CONFIG_PAGECACHE],S,Z,N)
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** where S is a NULL pointer shall disable the
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** [pagecache memory allocator].
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**
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** {H14162} A successful call to sqlite3_config(SQLITE_CONFIG_HEAP,H,Z,N)
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** {H14162} A successful call to [sqlite3_config]([SQLITE_CONFIG_HEAP],H,Z,N)
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** where Z and N are non-negative integers and
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** H is a pointer to an aligned memory buffer not less than
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** Z bytes in size shall enable the [memsys5] memory allocator
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** and cause it to use buffer S as its memory source and to use
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** a minimum allocation size of N.
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**
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** {H14165} A successful call to sqlite3_config(SQLITE_CONFIG_HEAP,H,Z,N)
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** {H14165} A successful call to [sqlite3_config]([SQLITE_CONFIG_HEAP],H,Z,N)
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** where H is a NULL pointer shall disable the
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** [memsys5] memory allocator.
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**
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** {H14168} A successful call to sqlite3_config(SQLITE_CONFIG_LOOKASIZE,Z,N)
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** {H14168} A successful call to [sqlite3_config]([SQLITE_CONFIG_LOOKASIDE],Z,N)
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** shall cause the default [lookaside memory allocator] configuration
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** for new [database connections] to be N slots of Z bytes each.
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*/
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SQLITE_EXPERIMENTAL int sqlite3_config(int, ...);
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/*
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** CAPI3REF: Configure database connections {H10180} <S20000>
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** CAPI3REF: Configure database connections {H14200} <S20000>
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** EXPERIMENTAL
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**
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** The sqlite3_db_config() interface is used to make configuration
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@ -1088,6 +1090,38 @@ SQLITE_EXPERIMENTAL int sqlite3_config(int, ...);
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** The only choice for this value is [SQLITE_DBCONFIG_LOOKASIDE].
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** New verbs are likely to be added in future releases of SQLite.
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** Additional arguments depend on the verb.
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**
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** INVARIANTS:
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**
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** {H14203} A call to [sqlite3_db_config(D,V,...)] shall return [SQLITE_OK]
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** if and only if the call is successful.
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**
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** {H14206} If one or more slots of the [lookaside memory allocator] for
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** [database connection] D are in use, then a call to
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** [sqlite3_db_config](D,[SQLITE_DBCONFIG_LOOKASIDE],...) shall
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** fail with an [SQLITE_BUSY] return code.
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**
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** {H14209} A successful call to
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** [sqlite3_db_config](D,[SQLITE_DBCONFIG_LOOKASIDE],B,Z,N) where
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** D is an open [database connection] and Z and N are positive
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** integers and B is an aligned buffer at least Z*N bytes in size
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** shall cause the [lookaside memory allocator] for D to use buffer B
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** with N slots of Z bytes each.
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**
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** {H14212} A successful call to
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** [sqlite3_db_config](D,[SQLITE_DBCONFIG_LOOKASIDE],B,Z,N) where
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** D is an open [database connection] and Z and N are positive
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** integers and B is NULL pointer shall cause the
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** [lookaside memory allocator] for D to a obtain Z*N byte buffer
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** from the primary memory allocator and use that buffer
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** with N lookaside slots of Z bytes each.
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**
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** {H14215} A successful call to
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** [sqlite3_db_config](D,[SQLITE_DBCONFIG_LOOKASIDE],B,Z,N) where
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** D is an open [database connection] and Z and N are zero shall
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** disable the [lookaside memory allocator] for D.
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**
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**
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*/
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SQLITE_EXPERIMENTAL int sqlite3_db_config(sqlite3*, int op, ...);
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@ -1353,17 +1387,17 @@ int sqlite3_extended_result_codes(sqlite3*, int onoff);
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** is another alias for the rowid.
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**
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** This routine returns the rowid of the most recent
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** successful INSERT into the database from the [database connection]
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** in the first argument. If no successful INSERTs
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** successful [INSERT] into the database from the [database connection]
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** in the first argument. If no successful [INSERT]s
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** have ever occurred on that database connection, zero is returned.
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**
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** If an INSERT occurs within a trigger, then the rowid of the inserted
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** If an [INSERT] occurs within a trigger, then the rowid of the inserted
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** row is returned by this routine as long as the trigger is running.
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** But once the trigger terminates, the value returned by this routine
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** reverts to the last value inserted before the trigger fired.
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**
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** An INSERT that fails due to a constraint violation is not a
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** successful INSERT and does not change the value returned by this
|
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** An [INSERT] that fails due to a constraint violation is not a
|
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** successful [INSERT] and does not change the value returned by this
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** routine. Thus INSERT OR FAIL, INSERT OR IGNORE, INSERT OR ROLLBACK,
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** and INSERT OR ABORT make no changes to the return value of this
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** routine when their insertion fails. When INSERT OR REPLACE
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@ -1372,23 +1406,24 @@ int sqlite3_extended_result_codes(sqlite3*, int onoff);
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** the constraint problem so INSERT OR REPLACE will always change
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** the return value of this interface.
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**
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** For the purposes of this routine, an INSERT is considered to
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** For the purposes of this routine, an [INSERT] is considered to
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** be successful even if it is subsequently rolled back.
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**
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** INVARIANTS:
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**
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** {H12221} The [sqlite3_last_insert_rowid()] function returns the rowid
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** of the most recent successful INSERT performed on the same
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** {H12221} The [sqlite3_last_insert_rowid()] function shall return the rowid
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** of the most recent successful [INSERT] performed on the same
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** [database connection] and within the same or higher level
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** trigger context, or zero if there have been no qualifying inserts.
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** trigger context, or zero if there have been no qualifying
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** [INSERT] statements.
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**
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** {H12223} The [sqlite3_last_insert_rowid()] function returns the
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** {H12223} The [sqlite3_last_insert_rowid()] function shall return the
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** same value when called from the same trigger context
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** immediately before and after a ROLLBACK.
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** immediately before and after a [ROLLBACK].
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**
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** ASSUMPTIONS:
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**
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** {A12232} If a separate thread performs a new INSERT on the same
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** {A12232} If a separate thread performs a new [INSERT] on the same
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** database connection while the [sqlite3_last_insert_rowid()]
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** function is running and thus changes the last insert rowid,
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** then the value returned by [sqlite3_last_insert_rowid()] is
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@ -1403,8 +1438,8 @@ sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);
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** This function returns the number of database rows that were changed
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** or inserted or deleted by the most recently completed SQL statement
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** on the [database connection] specified by the first parameter.
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** Only changes that are directly specified by the INSERT, UPDATE,
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** or DELETE statement are counted. Auxiliary changes caused by
|
||||
** Only changes that are directly specified by the [INSERT], [UPDATE],
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** or [DELETE] statement are counted. Auxiliary changes caused by
|
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** triggers are not counted. Use the [sqlite3_total_changes()] function
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** to find the total number of changes including changes caused by triggers.
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**
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@ -1438,13 +1473,15 @@ sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);
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** caused by subtriggers since those have their own context.
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**
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** SQLite implements the command "DELETE FROM table" without a WHERE clause
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** by dropping and recreating the table. (This is much faster than going
|
||||
** through and deleting individual elements from the table.) Because of this
|
||||
** by dropping and recreating the table. Doing so is much faster than going
|
||||
** through and deleting individual elements from the table. Because of this
|
||||
** optimization, the deletions in "DELETE FROM table" are not row changes and
|
||||
** will not be counted by the sqlite3_changes() or [sqlite3_total_changes()]
|
||||
** functions, regardless of the number of elements that were originally
|
||||
** in the table. To get an accurate count of the number of rows deleted, use
|
||||
** "DELETE FROM table WHERE 1" instead.
|
||||
** "DELETE FROM table WHERE 1" instead. Or recompile using the
|
||||
** [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option to disable the
|
||||
** optimization on all queries.
|
||||
**
|
||||
** INVARIANTS:
|
||||
**
|
||||
@ -1486,7 +1523,9 @@ int sqlite3_changes(sqlite3*);
|
||||
** will not be counted by the sqlite3_changes() or [sqlite3_total_changes()]
|
||||
** functions, regardless of the number of elements that were originally
|
||||
** in the table. To get an accurate count of the number of rows deleted, use
|
||||
** "DELETE FROM table WHERE 1" instead.
|
||||
** "DELETE FROM table WHERE 1" instead. Or recompile using the
|
||||
** [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option to disable the
|
||||
** optimization on all queries.
|
||||
**
|
||||
** See also the [sqlite3_changes()] interface.
|
||||
**
|
||||
|
||||
@ -16,7 +16,7 @@
|
||||
** The focus of this file is providing the TCL testing layer
|
||||
** access to compile-time constants.
|
||||
**
|
||||
** $Id: test_config.c,v 1.39 2008/10/10 04:34:16 shane Exp $
|
||||
** $Id: test_config.c,v 1.40 2008/10/10 23:48:26 drh Exp $
|
||||
*/
|
||||
|
||||
#include "sqliteLimit.h"
|
||||
@ -402,6 +402,12 @@ Tcl_SetVar2(interp, "sqlite_options", "long_double",
|
||||
STRINGVALUE(SQLITE_THREADSAFE), TCL_GLOBAL_ONLY);
|
||||
assert( sqlite3_threadsafe()==SQLITE_THREADSAFE );
|
||||
|
||||
#ifdef SQLITE_OMIT_TEMPDB
|
||||
Tcl_SetVar2(interp, "sqlite_options", "tempdb", "0", TCL_GLOBAL_ONLY);
|
||||
#else
|
||||
Tcl_SetVar2(interp, "sqlite_options", "tempdb", "1", TCL_GLOBAL_ONLY);
|
||||
#endif
|
||||
|
||||
#ifdef SQLITE_OMIT_TRACE
|
||||
Tcl_SetVar2(interp, "sqlite_options", "trace", "0", TCL_GLOBAL_ONLY);
|
||||
#else
|
||||
@ -414,10 +420,10 @@ Tcl_SetVar2(interp, "sqlite_options", "long_double",
|
||||
Tcl_SetVar2(interp, "sqlite_options", "trigger", "1", TCL_GLOBAL_ONLY);
|
||||
#endif
|
||||
|
||||
#ifdef SQLITE_OMIT_TEMPDB
|
||||
Tcl_SetVar2(interp, "sqlite_options", "tempdb", "0", TCL_GLOBAL_ONLY);
|
||||
#ifdef SQLITE_OMIT_TRUCATE_OPTIMIZATION
|
||||
Tcl_SetVar2(interp, "sqlite_options", "truncate_opt", "0", TCL_GLOBAL_ONLY);
|
||||
#else
|
||||
Tcl_SetVar2(interp, "sqlite_options", "tempdb", "1", TCL_GLOBAL_ONLY);
|
||||
Tcl_SetVar2(interp, "sqlite_options", "truncate_opt", "1", TCL_GLOBAL_ONLY);
|
||||
#endif
|
||||
|
||||
#ifdef SQLITE_OMIT_UTF16
|
||||
|
||||
Loading…
Reference in New Issue
Block a user