From: drh <drh@noemail.net>
Date: Fri, 1 Jan 2021 18:23:56 +0000 (+0000)
Subject: Size reduction and performance increase in sqlite3Prepare().
X-Git-Tag: version-3.35.0~154
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=88efc796c2928960977f49ad15af899c929ed433;p=thirdparty%2Fsqlite.git

Size reduction and performance increase in sqlite3Prepare().

FossilOrigin-Name: 41f45c8e894f48049325ccfef12cec0887b636bfad5d531a47628eb9e8612924
---

diff --git a/manifest b/manifest
index 27455ef2ac..98a89950b9 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Small\ssize\sreduction\sand\sperformance\simprovement\sin\ssqlite3VdbeMakeReady()\nby\slinking\sthe\snew\sprepared\sstatement\sinto\sthe\sprepared\sstatement\slist\ssooner\nrather\sthan\slater.
-D 2021-01-01T17:01:33.478
+C Size\sreduction\sand\sperformance\sincrease\sin\ssqlite3Prepare().
+D 2021-01-01T18:23:56.767
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -535,7 +535,7 @@ F src/pcache.h 4f87acd914cef5016fae3030343540d75f5b85a1877eed1a2a19b9f284248586
 F src/pcache1.c 6596e10baf3d8f84cc1585d226cf1ab26564a5f5caf85a15757a281ff977d51a
 F src/pragma.c 6daaaecc26a4b09481d21722525b079ce756751a43a79cc1d8f122d686806193
 F src/pragma.h 8dc78ab7e9ec6ce3ded8332810a2066f1ef6267e2e03cd7356ee00276125c6cf
-F src/prepare.c 270170a239c0f66bd3c228f373afe24447c2614a6829ae22080babc64f241931
+F src/prepare.c 7acf95d1f84853d3b1152909497002f1333c3b2ee26bc7fe8e43a167ab5fb003
 F src/printf.c 30e92b638fac71dcd85cdea1d12ecfae354c9adee2c71e8e1ae4727cde7c91ed
 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
 F src/resolve.c 1948a92ca9eab776632816b97e57c61d933474a78aad4f4ef835c916a83dbb1c
@@ -545,7 +545,7 @@ F src/shell.c.in 6dd0d9260220f807d6d1b8e57dd6e163fe55bd0e97fa416c8c139162e341613
 F src/sqlite.h.in 0af968a1fa3c717261e1df0ed105fa7bddb4d82de7e0adb3eab49e6aa81b4de7
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 61b38c073d5e1e96a3d45271b257aef27d0d13da2bea5347692ae579475cd95e
-F src/sqliteInt.h bd9c97bbf54ed566be46fe55b5c5d9506b66e627f483c7d4791fcdd26b639418
+F src/sqliteInt.h 1ae150649f0a5752e6b83f65089c05301966969df2b2beac7286c351581ac6ee
 F src/sqliteLimit.h d7323ffea5208c6af2734574bae933ca8ed2ab728083caa117c9738581a31657
 F src/status.c 4b8bc2a6905163a38b739854a35b826c737333fab5b1f8e03fa7eb9a4799c4c1
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@ -610,7 +610,7 @@ F src/trigger.c 515e79206d40d1d4149129318582e79a6e9db590a7b74e226fdb5b2a6c7e1b10
 F src/update.c 9f126204a6acb96bbe47391ae48e0fc579105d8e76a6d9c4fab3271367476580
 F src/upsert.c df8f1727d62b5987c4fd302cd4d7c0c84ae57cd65683c5a34a740dfe24039235
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
-F src/util.c c0c7977de7ef9b8cb10f6c85f2d0557889a658f817b0455909a49179ba4c8002
+F src/util.c 41c7a72da1df47864faa378a1c720b38adb288c6838cb6be5594511b6287a048
 F src/vacuum.c 492422c1463c076473bae1858799c7a0a5fe87a133d1223239447c422cd26286
 F src/vdbe.c 67de20067fa3a2ee8566342c751e941a2fe3fd88940fd9886ca5115f04165cce
 F src/vdbe.h 83603854bfa5851af601fc0947671eb260f4363e62e960e8a994fb9bbcd2aaa1
@@ -1895,7 +1895,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P d3196685d958bf22b5c362e96bbf8e1df58cc09cc3abc4bfa94bb33bc28c61aa
-R bad67f6d73ac47ab0047b97a3d4436f2
+P 2996e800a02967f9d0e27c816cf0b7b581a25634f94abcf167f27b019e1515e5
+R 0506b8b55e2eb63eafe4c191c8e24ddc
 U drh
-Z 8e16a28d94f61b89d64b2b5c78bce681
+Z 7bb1e47525328d1390b6713294a18b77
diff --git a/manifest.uuid b/manifest.uuid
index d5d2a4a3f1..9db5417678 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-2996e800a02967f9d0e27c816cf0b7b581a25634f94abcf167f27b019e1515e5
\ No newline at end of file
+41f45c8e894f48049325ccfef12cec0887b636bfad5d531a47628eb9e8612924
\ No newline at end of file
diff --git a/src/prepare.c b/src/prepare.c
index 13fd1d33b2..09fdbd78bc 100644
--- a/src/prepare.c
+++ b/src/prepare.c
@@ -671,12 +671,6 @@ static int sqlite3Prepare(
   }
   assert( 0==sParse.nQueryLoop );
 
-  if( sParse.rc==SQLITE_DONE ){
-    sParse.rc = SQLITE_OK;
-  }
-  if( sParse.checkSchema ){
-    schemaIsValid(&sParse);
-  }
   if( pzTail ){
     *pzTail = sParse.zTail;
   }
@@ -687,20 +681,28 @@ static int sqlite3Prepare(
   if( db->mallocFailed ){
     sParse.rc = SQLITE_NOMEM_BKPT;
   }
-  rc = sParse.rc;
-  if( rc!=SQLITE_OK ){
-    if( sParse.pVdbe ) sqlite3VdbeFinalize(sParse.pVdbe);
-    assert(!(*ppStmt));
+  if( sParse.rc!=SQLITE_OK && sParse.rc!=SQLITE_DONE ){
+    if( sParse.checkSchema ){
+      schemaIsValid(&sParse);
+    }
+    if( sParse.pVdbe ){
+      sqlite3VdbeFinalize(sParse.pVdbe);
+    }
+    assert( 0==(*ppStmt) );
+    rc = sParse.rc;
+    if( zErrMsg ){
+      sqlite3ErrorWithMsg(db, rc, "%s", zErrMsg);
+      sqlite3DbFree(db, zErrMsg);
+    }else{
+      sqlite3Error(db, rc);
+    }
   }else{
+    assert( zErrMsg==0 );
     *ppStmt = (sqlite3_stmt*)sParse.pVdbe;
+    rc = SQLITE_OK;
+    sqlite3ErrorClear(db);
   }
 
-  if( zErrMsg ){
-    sqlite3ErrorWithMsg(db, rc, "%s", zErrMsg);
-    sqlite3DbFree(db, zErrMsg);
-  }else{
-    sqlite3Error(db, rc);
-  }
 
   /* Delete any TriggerPrg structures allocated while parsing this statement. */
   while( sParse.pTriggerPrg ){
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 37df2911a6..f20fd70676 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -4573,6 +4573,7 @@ int sqlite3Atoi64(const char*, i64*, int, u8);
 int sqlite3DecOrHexToI64(const char*, i64*);
 void sqlite3ErrorWithMsg(sqlite3*, int, const char*,...);
 void sqlite3Error(sqlite3*,int);
+void sqlite3ErrorClear(sqlite3*);
 void sqlite3SystemError(sqlite3*,int);
 void *sqlite3HexToBlob(sqlite3*, const char *z, int n);
 u8 sqlite3HexToInt(int h);
diff --git a/src/util.c b/src/util.c
index fb86d7d118..fc0c2042bd 100644
--- a/src/util.c
+++ b/src/util.c
@@ -114,6 +114,16 @@ void sqlite3Error(sqlite3 *db, int err_code){
   if( err_code || db->pErr ) sqlite3ErrorFinish(db, err_code);
 }
 
+/*
+** The equivalent of sqlite3Error(db, SQLITE_OK).  Clear the error state
+** and error message.
+*/
+void sqlite3ErrorClear(sqlite3 *db){
+  assert( db!=0 );
+  db->errCode = SQLITE_OK;
+  if( db->pErr ) sqlite3ValueSetNull(db->pErr);
+}
+
 /*
 ** Load the sqlite3.iSysErrno field if that is an appropriate thing
 ** to do based on the SQLite error code in rc.