Create and use a function especially for adding the ParseSchema opcode.

This gives a small reduction in code and a small performance increase.

FossilOrigin-Name: 957b2ab67c6185f0e1062593d237de5c434a38bf

manifest

@@ -1,5 +1,5 @@
-C Factor\san\s"if"\sout\sof\sa\sloop\sin\sbalance_nonroot()\sfor\sabout\sa\s1%\sperformance\nincrease.
-D 2011-06-03T17:50:49.782
+C Create\sand\suse\sa\sfunction\sespecially\sfor\sadding\sthe\sParseSchema\sopcode.\nThis\sgives\sa\ssmall\sreduction\sin\scode\sand\sa\ssmall\sperformance\sincrease.
+D 2011-06-03T20:11:17.958
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 11dcc00a8d0e5202def00e81732784fb0cc4fe1d
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -115,7 +115,7 @@ F spec.template 86a4a43b99ebb3e75e6b9a735d5fd293a24e90ca
 F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
 F sqlite3.1 6be1ad09113570e1fc8dcaff84c9b0b337db5ffc
 F sqlite3.pc.in ae6f59a76e862f5c561eb32a380228a02afc3cad
-F src/alter.c 280f5c04b11b492703a342222b3de0a999445280
+F src/alter.c ac80a0f31189f8b4a524ebf661e47e84536ee7f5
 F src/analyze.c a425d62e8fa9ebcb4359ab84ff0c62c6563d2e2a
 F src/attach.c 12c6957996908edc31c96d7c68d4942c2474405f
 F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
@@ -125,7 +125,7 @@ F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
 F src/btree.c 12aa3b71359c888984223cb2bcf691cf2d7753ae
 F src/btree.h f5d775cd6cfc7ac32a2535b70e8d2af48ef5f2ce
 F src/btreeInt.h 67978c014fa4f7cc874032dd3aacadd8db656bc3
-F src/build.c c10ab9e2c77ade99dee23554787f8acfc0c231fc
+F src/build.c 5a428625d21ad409514afb40ad083bee25dd957a
 F src/callback.c 0425c6320730e6d3981acfb9202c1bed9016ad1a
 F src/complete.c dc1d136c0feee03c2f7550bafc0d29075e36deac
 F src/ctime.c 7deec4534f3b5a0c3b4a4cbadf809d321f64f9c4
@@ -231,20 +231,20 @@ F src/test_vfstrace.c 0b884e06094a746da729119a2cabdc7aa790063d
 F src/test_wholenumber.c 6129adfbe7c7444f2e60cc785927f3aa74e12290
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/tokenize.c 7b0c9281b2368dc69135e7a50bd271de9af1b467
-F src/trigger.c 144cc18bb701f3286484aae4292a9531f09278c8
+F src/trigger.c c836a6caac16ba96611558922106858f6ca3d6bf
 F src/update.c 5bcb56e5c7380a2eecb0e71891dbd4ad7437748f
 F src/utf.c d83650c3ea08f7407bd9d0839d9885241c209c60
 F src/util.c 0f33bbbdfcc4a2d8cf20c3b2a16ffc3b57c58a70
 F src/vacuum.c 05513dca036a1e7848fe18d5ed1265ac0b32365e
 F src/vdbe.c edfa3827d7a6fac2425bc10c0eb6e54342d2fa56
-F src/vdbe.h d9c6123384189dc37d27beac1bf44688aa75b6cb
+F src/vdbe.h 5cf09e7ee8a3f7d93bc51f196a96550786afe7a1
 F src/vdbeInt.h ad84226cc0adcb1185c22b70696b235a1678bb45
 F src/vdbeapi.c 0eeadc75e44a30efd996d6af6e7c5a2488e35be8
-F src/vdbeaux.c 0505dc4f7ff3cf35e219fe0a20ab798a42772b8b
+F src/vdbeaux.c 0b2e2880f13af400a27c92a7673287c3eaec8b21
 F src/vdbeblob.c f024f0bf420f36b070143c32b15cc7287341ffd3
 F src/vdbemem.c 0498796b6ffbe45e32960d6a1f5adfb6e419883b
 F src/vdbetrace.c 5d0dc3d5fd54878cc8d6d28eb41deb8d5885b114
-F src/vtab.c 9ba8c7fdb7d39260c033a402f6032d3e7bc5d336
+F src/vtab.c 901791a47318c0562cd0c676a2c6ff1bc530e582
 F src/wal.c 0c70ad7b1cac6005fa5e2cbefd23ee05e391c290
 F src/wal.h 66b40bd91bc29a5be1c88ddd1f5ade8f3f48728a
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
@@ -942,7 +942,7 @@ F tool/split-sqlite3c.tcl d9be87f1c340285a3e081eb19b4a247981ed290c
 F tool/symbols.sh bc2a3709940d47c8ac8e0a1fdf17ec801f015a00
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings.sh 347d974d143cf132f953b565fbc03026f19fcb4d
-P 0206bc6f87bb9393218a380fc5b18039d334a8d8
-R 9437f6a8af920a11b9b18fbeccb53c6b
+P 1bd72d0c616e20fdb395c72ecd96579090ae26cb
+R 80ecde493cfcd0f0a571171fe6ad9164
 U drh
-Z d6270d9f0f6d36a33c5a8dae47c51fc0
+Z 08497a0228f24f1156217359e2dbd164

manifest.uuid

@@ -1 +1 @@
-1bd72d0c616e20fdb395c72ecd96579090ae26cb
+957b2ab67c6185f0e1062593d237de5c434a38bf

src/alter.c

@@ -358,14 +358,14 @@ static void reloadTableSchema(Parse *pParse, Table *pTab, const char *zName){
   /* Reload the table, index and permanent trigger schemas. */
   zWhere = sqlite3MPrintf(pParse->db, "tbl_name=%Q", zName);
   if( !zWhere ) return;
-  sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, zWhere, P4_DYNAMIC);
+  sqlite3VdbeAddParseSchemaOp(v, iDb, zWhere);
 
 #ifndef SQLITE_OMIT_TRIGGER
   /* Now, if the table is not stored in the temp database, reload any temp 
   ** triggers. Don't use IN(...) in case SQLITE_OMIT_SUBQUERY is defined. 
   */
   if( (zWhere=whereTempTriggers(pParse, pTab))!=0 ){
-    sqlite3VdbeAddOp4(v, OP_ParseSchema, 1, 0, 0, zWhere, P4_DYNAMIC);
+    sqlite3VdbeAddParseSchemaOp(v, 1, zWhere);
   }
 #endif
 }

src/build.c

@@ -1619,8 +1619,8 @@ void sqlite3EndTable(
 #endif
 
     /* Reparse everything to update our internal data structures */
-    sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0,
-        sqlite3MPrintf(db, "tbl_name='%q'",p->zName), P4_DYNAMIC);
+    sqlite3VdbeAddParseSchemaOp(v, iDb,
+               sqlite3MPrintf(db, "tbl_name='%q'", p->zName));
   }
 
 
@@ -2817,9 +2817,8 @@ Index *sqlite3CreateIndex(
     if( pTblName ){
       sqlite3RefillIndex(pParse, pIndex, iMem);
       sqlite3ChangeCookie(pParse, iDb);
-      sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0,
-         sqlite3MPrintf(db, "name='%q' AND type='index'", pIndex->zName), 
-         P4_DYNAMIC);
+      sqlite3VdbeAddParseSchemaOp(v, iDb,
+         sqlite3MPrintf(db, "name='%q' AND type='index'", pIndex->zName));
       sqlite3VdbeAddOp1(v, OP_Expire, 0);
     }
   }

src/trigger.c

@@ -301,9 +301,8 @@ void sqlite3FinishTrigger(
        pTrig->table, z);
     sqlite3DbFree(db, z);
     sqlite3ChangeCookie(pParse, iDb);
-    sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, sqlite3MPrintf(
-        db, "type='trigger' AND name='%q'", zName), P4_DYNAMIC
-    );
+    sqlite3VdbeAddParseSchemaOp(v, iDb,
+        sqlite3MPrintf(db, "type='trigger' AND name='%q'", zName));
   }
 
   if( db->init.busy ){

src/vdbe.h

@@ -172,6 +172,7 @@ int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int);
 int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int);
 int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int);
 int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
+void sqlite3VdbeAddParseSchemaOp(Vdbe*,int,char*);
 void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1);
 void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2);
 void sqlite3VdbeChangeP3(Vdbe*, int addr, int P3);

src/vdbeaux.c

@@ -156,13 +156,6 @@ int sqlite3VdbeAddOp3(Vdbe *p, int op, int p1, int p2, int p3){
   pOp->p3 = p3;
   pOp->p4.p = 0;
   pOp->p4type = P4_NOTUSED;
-  p->expired = 0;
-  if( op==OP_ParseSchema ){
-    /* Any program that uses the OP_ParseSchema opcode needs to lock
-    ** all btrees. */
-    int j;
-    for(j=0; j<p->db->nDb; j++) sqlite3VdbeUsesBtree(p, j);
-  }
 #ifdef SQLITE_DEBUG
   pOp->zComment = 0;
   if( sqlite3VdbeAddopTrace ) sqlite3VdbePrintOp(0, i, &p->aOp[i]);
@@ -201,6 +194,20 @@ int sqlite3VdbeAddOp4(
   return addr;
 }
 
+/*
+** Add an OP_ParseSchema opcode.  This routine is broken out from
+** sqlite3VdbeAddOp4() since it needs to also local all btrees.
+**
+** The zWhere string must have been obtained from sqlite3_malloc().
+** This routine will take ownership of the allocated memory.
+*/
+void sqlite3VdbeAddParseSchemaOp(Vdbe *p, int iDb, char *zWhere){
+  int j;
+  int addr = sqlite3VdbeAddOp3(p, OP_ParseSchema, iDb, 0, 0);
+  sqlite3VdbeChangeP4(p, addr, zWhere, P4_DYNAMIC);
+  for(j=0; j<p->db->nDb; j++) sqlite3VdbeUsesBtree(p, j);
+}
+
 /*
 ** Add an opcode that includes the p4 value as an integer.
 */

src/vtab.c

@@ -383,7 +383,7 @@ void sqlite3VtabFinishParse(Parse *pParse, Token *pEnd){
 
     sqlite3VdbeAddOp2(v, OP_Expire, 0, 0);
     zWhere = sqlite3MPrintf(db, "name='%q' AND type='table'", pTab->zName);
-    sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, zWhere, P4_DYNAMIC);
+    sqlite3VdbeAddParseSchemaOp(v, iDb, zWhere);
     sqlite3VdbeAddOp4(v, OP_VCreate, iDb, 0, 0, 
                          pTab->zName, sqlite3Strlen30(pTab->zName) + 1);
   }