Small performance improvement for sqlite3BtreeInsert().

FossilOrigin-Name: 4ae64484c57740333322cebd713b50b01a5a5838d41c65f67e26d65769770789

diff --git a/manifest b/manifest
index 7bc57312f6dbc8bf11f6454b22a3df7759bfff16..0ead98eac2c80b0b058847b3942da2b3ae9baa0a 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Avoid\sadding\ssuperfluous\svirtual\sWHERE\sclause\sterms\sthat\smight\sarise\sdue\nto\sthe\sconstant\spropagation\soptimization.
-D 2021-05-14T15:37:00.870
+C Small\sperformance\simprovement\sfor\ssqlite3BtreeInsert().
+D 2021-05-14T20:01:36.170
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -484,7 +484,7 @@ F src/auth.c 08954fdc4cc2da5264ba5b75cfd90b67a6fc7d1710a02ccf917c38eadec77853
 F src/backup.c 3014889fa06e20e6adfa0d07b60097eec1f6e5b06671625f476a714d2356513d
 F src/bitvec.c 17ea48eff8ba979f1f5b04cc484c7bb2be632f33
 F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
-F src/btree.c 5372d8bca3374145477e129be5ed6e907731e1d117c0dc1b524b536f1cc0e577
+F src/btree.c 43e755a22fa4e94cc3203b604200946088c1bb9f1b80ebacde496d515161c7e7
 F src/btree.h 096cc53baa58be22b02c896d1cf933c38cfc6d65f9253c1367ece8cc88a24de5
 F src/btreeInt.h 7bc15a24a02662409ebcd6aeaa1065522d14b7fda71573a2b0568b458f514ae0
 F src/build.c a7866beda66a7c8971e013674c7f659d19977d9ad51e11032479b1f754d1ef21
@@ -1913,7 +1913,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P e994c9f29f7a561dd5f30573865b0f793fb1388af09a2afb9b1a5b037ea52f89
-R f40d700cac45a3fbd24f4a4f0d5ee607
+P cf63abbe559d04f993f99a37d41ba4a97c0261094f1d4cc05cfa23b1e11731f5
+R 56636569b2dc12071ca5587b9d291c1a
 U drh
-Z 0bdc8a9f4500418f11b804dea881401d
+Z 87019381c8d9b7e2ea4914c987f0da73

diff --git a/manifest.uuid b/manifest.uuid
index d2b8b672a812dc656e2c3580f77cbe68784d2164..8fb0a89515e8cb059d883d7de878efa549407d54 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-cf63abbe559d04f993f99a37d41ba4a97c0261094f1d4cc05cfa23b1e11731f5
\ No newline at end of file
+4ae64484c57740333322cebd713b50b01a5a5838d41c65f67e26d65769770789
\ No newline at end of file

diff --git a/src/btree.c b/src/btree.c
index 7ee0b4eaf6383704d67665fa62e7a1d400c2071b..e38a7c07c5e374c73704c5294a6a8903c76fba46 100644 (file)
--- a/src/btree.c
+++ b/src/btree.c
@@ -547,7 +547,8 @@ static void invalidateIncrblobCursors(
   int isClearTable        /* True if all rows are being deleted */
 ){
   BtCursor *p;
-  if( pBtree->hasIncrblobCur==0 ) return;
+  // if( pBtree->hasIncrblobCur==0 ) return;
+  assert( pBtree->hasIncrblobCur );
   assert( sqlite3BtreeHoldsMutex(pBtree) );
   pBtree->hasIncrblobCur = 0;
   for(p=pBtree->pBt->pCursor; p; p=p->pNext){
@@ -8752,7 +8753,9 @@ int sqlite3BtreeInsert(
     assert( pX->pKey==0 );
     /* If this is an insert into a table b-tree, invalidate any incrblob 
     ** cursors open on the row being replaced */
-    invalidateIncrblobCursors(p, pCur->pgnoRoot, pX->nKey, 0);
+    if( p->hasIncrblobCur ){
+      invalidateIncrblobCursors(p, pCur->pgnoRoot, pX->nKey, 0);
+    }
 
     /* If BTREE_SAVEPOSITION is set, the cursor must already be pointing 
     ** to a row with the same key as the new entry being inserted.
@@ -9179,7 +9182,7 @@ int sqlite3BtreeDelete(BtCursor *pCur, u8 flags){
 
   /* If this is a delete operation to remove a row from a table b-tree,
   ** invalidate any incrblob cursors open on the row being deleted.  */
-  if( pCur->pKeyInfo==0 ){
+  if( pCur->pKeyInfo==0 && p->hasIncrblobCur ){
     invalidateIncrblobCursors(p, pCur->pgnoRoot, pCur->info.nKey, 0);
   }
 
@@ -9523,7 +9526,9 @@ int sqlite3BtreeClearTable(Btree *p, int iTable, int *pnChange){
     /* Invalidate all incrblob cursors open on table iTable (assuming iTable
     ** is the root of a table b-tree - if it is not, the following call is
     ** a no-op).  */
-    invalidateIncrblobCursors(p, (Pgno)iTable, 0, 1);
+    if( p->hasIncrblobCur ){
+      invalidateIncrblobCursors(p, (Pgno)iTable, 0, 1);
+    }
     rc = clearDatabasePage(pBt, (Pgno)iTable, 0, pnChange);
   }
   sqlite3BtreeLeave(p);