Fix a comment in btree.c (CVS 3702)

FossilOrigin-Name: 05700c11a9e5177a437d2240e72fb61ea47b973b

diff --git a/manifest b/manifest
index ec3deff97376318cbd6e7c4800305a7763084a85..86986efb673c301d54a0a8b5eea82d6f301fcfa2 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Changes\sto\ssupport\smedium\ssector\ssizes\slarger\sthan\sthe\sdatabase\spage\ssize.\s(CVS\s3701)
-D 2007-03-19T11:25:20
+C Fix\sa\scomment\sin\sbtree.c\s(CVS\s3702)
+D 2007-03-19T11:54:10
 F Makefile.in 1fe3d0b46e40fd684e1e61f8e8056cefed16de9f
 F Makefile.linux-gcc 2d8574d1ba75f129aba2019f0b959db380a90935
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -58,7 +58,7 @@ F src/alter.c 2c79ec40f65e33deaf90ca493422c74586e481a3
 F src/analyze.c 7d2b7ab9a9c2fd6e55700f69064dfdd3e36d7a8a
 F src/attach.c fd286a9140a2df84b1482f052b67ff5fad9569a1
 F src/auth.c 902f4722661c796b97f007d9606bd7529c02597f
-F src/btree.c 4336ada77332acb947af6d382f0f3648ea9d8b6c
+F src/btree.c f5278b44929198098ed382101ce97b58ceacb5cd
 F src/btree.h 066444ee25bd6e6accb997bfd2cf5ace14dbcd00
 F src/build.c f2edc786b5bf165a7d0949ed3a5872455a610c0e
 F src/callback.c 31d22b4919c7645cbcbb1591ce2453e8c677c558
@@ -437,7 +437,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
 F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
-P 5752d84d374205e011d49b0221d6237967fe0743
-R 35e0cdc81bf64a560c8bcc30c7e3b7e8
-U danielk1977
-Z 835c96473334a1bbc531e7fce3e63932
+P 3a3e8eb25d8e04cfccc5c0513ed04efcc25d3dbf
+R a297b1419430310b47806366b750440a
+U drh
+Z 55992e8d0ba687290ede6e38f8418c27

diff --git a/manifest.uuid b/manifest.uuid
index 4a1553172fb29a07a88694f5fa8de7b4c3c58e49..200fd54ba3809bff11f826d5dda166011ccb8401 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-3a3e8eb25d8e04cfccc5c0513ed04efcc25d3dbf
\ No newline at end of file
+05700c11a9e5177a437d2240e72fb61ea47b973b
\ No newline at end of file

diff --git a/src/btree.c b/src/btree.c
index fe04ddc9ac1e02253e13b39bbc7e0ded30adea68..12aa538df00caf7ab058d2979fad622d7b0f412a 100644 (file)
--- a/src/btree.c
+++ b/src/btree.c
@@ -9,7 +9,7 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.339 2007/03/19 11:25:20 danielk1977 Exp $
+** $Id: btree.c,v 1.340 2007/03/19 11:54:10 drh Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** For a detailed discussion of BTrees, refer to
@@ -2649,25 +2649,16 @@ static int dfltCompare(
 **
 ** 1:  The cursor must have been opened with wrFlag==1
 **
-** 2:  No other cursors may be open with wrFlag==0 on the same table
+** 2:  Other database connections that share the same pager cache
+**     but which are not in the READ_UNCOMMITTED state may not have
+**     cursors open with wrFlag==0 on the same table.  Otherwise
+**     the changes made by this write cursor would be visible to
+**     the read cursors in the other database connection.
 **
 ** 3:  The database must be writable (not on read-only media)
 **
 ** 4:  There must be an active transaction.
 **
-** Condition 2 warrants further discussion.  If any cursor is opened
-** on a table with wrFlag==0, that prevents all other cursors from
-** writing to that table.  This is a kind of "read-lock".  When a cursor
-** is opened with wrFlag==0 it is guaranteed that the table will not
-** change as long as the cursor is open.  This allows the cursor to
-** do a sequential scan of the table without having to worry about
-** entries being inserted or deleted during the scan.  Cursors should
-** be opened with wrFlag==0 only if this read-lock property is needed.
-** That is to say, cursors should be opened with wrFlag==0 only if they
-** intend to use the sqlite3BtreeNext() system call.  All other cursors
-** should be opened with wrFlag==1 even if they never really intend
-** to write.
-** 
 ** No checking is done to make sure that page iTable really is the
 ** root page of a b-tree.  If it is not, then the cursor acquired
 ** will not work correctly.