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Update the documentation on the sqlite3_changes() and sqlite3_total_changes()

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functions. (CVS 6568)

FossilOrigin-Name: 58c7bdb21c719bf06713ff8ffa7ee51cf1973712
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drh
2009-04-29 14:33:44 +00:00
parent 6eacd28a28
commit d9c20d71c2
3 changed files with 29 additions and 39 deletions
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14
manifest
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@@ -1,5 +1,5 @@
C Fix\sa\scase\sin\swhere.c\swhere\sa\scrash\scan\sfollow\sa\smalloc\sfailure.\sAlso\smodify\stest\scode\sin\stest8.c\sto\scheck\sa\sreturn\scode\sthat\swas\sbeing\sdropped\s(causing\sa\stest\sin\svtab_err.test\sto\sfail).\s(CVS\s6567) C Update\sthe\sdocumentation\son\sthe\ssqlite3_changes()\sand\ssqlite3_total_changes()\nfunctions.\s(CVS\s6568)
D 2009-04-29T11:50:54 D 2009-04-29T14:33:44
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in 583e87706abc3026960ed759aff6371faf84c211 F Makefile.in 583e87706abc3026960ed759aff6371faf84c211
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -160,7 +160,7 @@ F src/resolve.c 094e44450371fb27869eb8bf679aacbe51fdc56d
F src/rowset.c 14d12b5e81b5907b87d511f6f4219805f96a4b55 F src/rowset.c 14d12b5e81b5907b87d511f6f4219805f96a4b55
F src/select.c 40748e8044b79d41ba04ce1014ae45434ed452d3 F src/select.c 40748e8044b79d41ba04ce1014ae45434ed452d3
F src/shell.c 0a11f831603f17fea20ca97133c0f64e716af4a7 F src/shell.c 0a11f831603f17fea20ca97133c0f64e716af4a7
F src/sqlite.h.in 4028ba942fa43afa7f8ade88fa9acedaa024ddeb F src/sqlite.h.in 2b7667d7912abe14af4ab84e7c4ed022e734f7ba
F src/sqlite3ext.h 1db7d63ab5de4b3e6b83dd03d1a4e64fef6d2a17 F src/sqlite3ext.h 1db7d63ab5de4b3e6b83dd03d1a4e64fef6d2a17
F src/sqliteInt.h 61be3597d7dce6b3d360a7185c760c3e4e968a59 F src/sqliteInt.h 61be3597d7dce6b3d360a7185c760c3e4e968a59
F src/sqliteLimit.h ffe93f5a0c4e7bd13e70cd7bf84cfb5c3465f45d F src/sqliteLimit.h ffe93f5a0c4e7bd13e70cd7bf84cfb5c3465f45d
@@ -725,7 +725,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
P e8f7f7b787fe941093edaea44db4d361fad1e002 P 9664e2b6c69271a7ca55af7812a186773a7c6592
R 4de805b014550f062517076b8e0aa32b R 8444b35afee909cdcb2c2ac18b099c09
U danielk1977 U drh
Z cc423cf5b9f2744841b886533297cfcf Z b5d9513f3dd8602eb18f6166440d0146

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9664e2b6c69271a7ca55af7812a186773a7c6592 58c7bdb21c719bf06713ff8ffa7ee51cf1973712

52
src/sqlite.h.in
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** the version number) and changes its name to "sqlite3.h" as ** the version number) and changes its name to "sqlite3.h" as
** part of the build process. ** part of the build process.
** **
** @(#) $Id: sqlite.h.in,v 1.445 2009/04/28 04:46:42 drh Exp $ ** @(#) $Id: sqlite.h.in,v 1.446 2009/04/29 14:33:44 drh Exp $
*/ */
#ifndef _SQLITE3_H_ #ifndef _SQLITE3_H_
#define _SQLITE3_H_ #define _SQLITE3_H_
@@ -1223,14 +1223,18 @@ sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);
** triggers are not counted. Use the [sqlite3_total_changes()] function ** triggers are not counted. Use the [sqlite3_total_changes()] function
** to find the total number of changes including changes caused by triggers. ** to find the total number of changes including changes caused by triggers.
** **
** Changes to a view that are simulated by an [INSTEAD OF trigger]
** are not counted. Only real table changes are counted.
**
** A "row change" is a change to a single row of a single table ** A "row change" is a change to a single row of a single table
** caused by an INSERT, DELETE, or UPDATE statement. Rows that ** caused by an INSERT, DELETE, or UPDATE statement. Rows that
** are changed as side effects of REPLACE constraint resolution, ** are changed as side effects of [REPLACE] constraint resolution,
** rollback, ABORT processing, DROP TABLE, or by any other ** rollback, ABORT processing, [DROP TABLE], or by any other
** mechanisms do not count as direct row changes. ** mechanisms do not count as direct row changes.
** **
** A "trigger context" is a scope of execution that begins and ** A "trigger context" is a scope of execution that begins and
** ends with the script of a trigger. Most SQL statements are ** ends with the script of a [CREATE TRIGGER | trigger].
** Most SQL statements are
** evaluated outside of any trigger. This is the "top level" ** evaluated outside of any trigger. This is the "top level"
** trigger context. If a trigger fires from the top level, a ** trigger context. If a trigger fires from the top level, a
** new trigger context is entered for the duration of that one ** new trigger context is entered for the duration of that one
@@ -1252,16 +1256,8 @@ sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);
** However, the number returned does not include changes ** However, the number returned does not include changes
** caused by subtriggers since those have their own context. ** caused by subtriggers since those have their own context.
** **
** SQLite implements the command "DELETE FROM table" without a WHERE clause ** See also the [sqlite3_total_changes()] interface and the
** by dropping and recreating the table. Doing so is much faster than going ** [count_changes pragma].
** 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. Or recompile using the
** [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option to disable the
** optimization on all queries.
** **
** Requirements: ** Requirements:
** [H12241] [H12243] ** [H12241] [H12243]
@@ -1275,27 +1271,21 @@ int sqlite3_changes(sqlite3*);
/* /*
** CAPI3REF: Total Number Of Rows Modified {H12260} <S10600> ** CAPI3REF: Total Number Of Rows Modified {H12260} <S10600>
** **
** This function returns the number of row changes caused by INSERT, ** This function returns the number of row changes caused by [INSERT],
** UPDATE or DELETE statements since the [database connection] was opened. ** [UPDATE] or [DELETE] statements since the [database connection] was opened.
** The count includes all changes from all trigger contexts. However, ** The count includes all changes from all
** the count does not include changes used to implement REPLACE constraints, ** [CREATE TRIGGER | trigger] contexts. However,
** do rollbacks or ABORT processing, or DROP table processing. ** the count does not include changes used to implement [REPLACE] constraints,
** do rollbacks or ABORT processing, or [DROP TABLE] processing. The
** count does not rows of views that fire an [INSTEAD OF trigger], though if
** the INSTEAD OF trigger makes changes of its own, those changes are
** counted.
** The changes are counted as soon as the statement that makes them is ** The changes are counted as soon as the statement that makes them is
** completed (when the statement handle is passed to [sqlite3_reset()] or ** completed (when the statement handle is passed to [sqlite3_reset()] or
** [sqlite3_finalize()]). ** [sqlite3_finalize()]).
** **
** SQLite implements the command "DELETE FROM table" without a WHERE clause ** See also the [sqlite3_changes()] interface and the
** by dropping and recreating the table. (This is much faster than going ** [count_changes pragma].
** 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. Or recompile using the
** [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option to disable the
** optimization on all queries.
**
** See also the [sqlite3_changes()] interface.
** **
** Requirements: ** Requirements:
** [H12261] [H12263] ** [H12261] [H12263]