Enhance the sqlite3VdbeMultiLoad() interface to automatically generate the

OP_ResultRow opcode on PRAGMA implementations, for a small reduction in the
library footprint.

FossilOrigin-Name: c46f0f076c674891e20240bad56693d891aedc43004bcf980a5d199515f23413

manifest

@@ -1,5 +1,5 @@
-C Exploit\sthe\sfact\sthat\sExpr.pRight\sand\sExpr.x\sare\snever\sused\sat\sthe\ssame\stime\nfor\sa\ssmall\sperformance\sgain.
-D 2017-07-07T13:59:34.309
+C Enhance\sthe\ssqlite3VdbeMultiLoad()\sinterface\sto\sautomatically\sgenerate\sthe\nOP_ResultRow\sopcode\son\sPRAGMA\simplementations,\sfor\sa\ssmall\sreduction\sin\sthe\nlibrary\sfootprint.
+D 2017-07-07T16:00:53.019
 F Makefile.in 081e48dfe7f995d57ce1a88ddf4d2917b4349158648a6cd45b42beae30de3a12
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 4ebb1d257cac7fb1bcb4ba59278416d410ff1c4bf59447a9c37a415f3516056a
@@ -441,7 +441,7 @@ F src/parse.y 71bf06b02f567232deabe258641b03e833e93c4dee61a120765ad74c13e7faec
 F src/pcache.c 62835bed959e2914edd26afadfecce29ece0e870
 F src/pcache.h 521bb9610d38ef17a3cc9b5ddafd4546c2ea67fa3d0e464823d73c2a28d50e11
 F src/pcache1.c 1195a21fe28e223e024f900b2011e80df53793f0356a24caace4188b098540dc
-F src/pragma.c 2362670a9d28b71708aecb2b9b10b3f7be71f4c950961c07e81dc400e3ce6371
+F src/pragma.c 3f9456edac7eaf171041d51510c5cc922c9b3bd56a713fb7ad6d5b85aa72f1f6
 F src/pragma.h 99d3df4a3d2f12c5227ad403f767334910e6356325b6d155a9a99b4037093460
 F src/prepare.c 4b84ae7458febe1df3e04ae62ba56abc851f771340e460d14426e6802c5615f4
 F src/printf.c 8757834f1b54dae512fb25eb1acc8e94a0d15dd2290b58f2563f65973265adb2
@@ -519,7 +519,7 @@ F src/vdbe.c adc8a378710ec2376101483cc8a5f499539ee9bbebfb2a784f3370704d5d44ad
 F src/vdbe.h dde459b1e8a02b8445ecfd5959f38cd5ebb6b0ad392d491d8b159ac8193d231a
 F src/vdbeInt.h 8dd7548d86a98b77b6ed910d8014d0e9e0666356b56f3d16ab7063aad4f102f5
 F src/vdbeapi.c 899d8f021c89ab348708b3a9b00b855f5ecc3c0f949a75359a61a3c621021281
-F src/vdbeaux.c 32ff5e8a7226c0bc6df0f214a5cc1a76fcc5d8863c491a800ef3d6f5236feae7
+F src/vdbeaux.c 6f01fe8a49b801cc7734ccfc61d1b782131ee3bb7ee28e336f3c73474800f8f9
 F src/vdbeblob.c 359891617358deefc85bef7bcf787fa6b77facb9
 F src/vdbemem.c 8d78df62becfd2dce3c317f64b32a94ecaff8346d814bc8b0b877b38a1ad3718
 F src/vdbesort.c f512c68d0bf7e0105316a5594c4329358c8ee9cae3b25138df041d97516c0372
@@ -1628,7 +1628,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 115d4b83392d346634866dd959bef30fca50db2e526df17eaeb3d94da7fc895e
-R 582e201382f2bd562c6f1266d901f884
+P aacbb9a461fdb34c7f9c8ce348e44c3e96c93334f210d438d92bfac1794dc686
+R 7baffcdf7a331e746202781d1effd9e4
 U drh
-Z 92ef67718e1f4940d85eca215e487e0c
+Z f6a212b381ae2bf356b441292bd9b562

manifest.uuid

@@ -1 +1 @@
-aacbb9a461fdb34c7f9c8ce348e44c3e96c93334f210d438d92bfac1794dc686
+c46f0f076c674891e20240bad56693d891aedc43004bcf980a5d199515f23413

src/pragma.c

@@ -1108,7 +1108,6 @@ void sqlite3Pragma(
                pCol->notNull ? 1 : 0,
                pCol->pDflt ? pCol->pDflt->u.zToken : 0,
                k);
-        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
       }
     }
   }
@@ -1128,9 +1127,8 @@ void sqlite3Pragma(
            pTab->szTabRow,
            pTab->nRowLogEst,
            pTab->tabFlags);
-      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
       for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
-        sqlite3VdbeMultiLoad(v, 2, "siii",
+        sqlite3VdbeMultiLoad(v, 2, "siiiX",
            pIdx->zName,
            pIdx->szIdxRow,
            pIdx->aiRowLogEst[0],
@@ -1163,10 +1161,10 @@ void sqlite3Pragma(
       assert( pParse->nMem<=pPragma->nPragCName );
       for(i=0; i<mx; i++){
         i16 cnum = pIdx->aiColumn[i];
-        sqlite3VdbeMultiLoad(v, 1, "iis", i, cnum,
+        sqlite3VdbeMultiLoad(v, 1, "iisX", i, cnum,
                              cnum<0 ? 0 : pTab->aCol[cnum].zName);
         if( pPragma->iArg ){
-          sqlite3VdbeMultiLoad(v, 4, "isi",
+          sqlite3VdbeMultiLoad(v, 4, "isiX",
             pIdx->aSortOrder[i],
             pIdx->azColl[i],
             i<pIdx->nKeyCol);
@@ -1193,7 +1191,6 @@ void sqlite3Pragma(
            IsUniqueIndex(pIdx),
            azOrigin[pIdx->idxType],
            pIdx->pPartIdxWhere!=0);
-        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
       }
     }
   }
@@ -1209,7 +1206,6 @@ void sqlite3Pragma(
          i,
          db->aDb[i].zDbSName,
          sqlite3BtreeGetFilename(db->aDb[i].pBt));
-      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
     }
   }
   break;
@@ -1221,7 +1217,6 @@ void sqlite3Pragma(
     for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
       CollSeq *pColl = (CollSeq *)sqliteHashData(p);
       sqlite3VdbeMultiLoad(v, 1, "is", i++, pColl->zName);
-      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
     }
   }
   break;
@@ -1250,7 +1245,6 @@ void sqlite3Pragma(
                    actionName(pFK->aAction[1]),  /* ON UPDATE */
                    actionName(pFK->aAction[0]),  /* ON DELETE */
                    "NONE");
-            sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 8);
           }
           ++i;
           pFK = pFK->pNextFrom;
@@ -1360,7 +1354,7 @@ void sqlite3Pragma(
         }else{
           sqlite3VdbeAddOp2(v, OP_Null, 0, regResult+1);
         }
-        sqlite3VdbeMultiLoad(v, regResult+2, "si", pFK->zTo, i-1);
+        sqlite3VdbeMultiLoad(v, regResult+2, "siX", pFK->zTo, i-1);
         sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4);
         sqlite3VdbeResolveLabel(v, addrOk);
         sqlite3DbFree(db, aiCols);
@@ -2062,7 +2056,6 @@ void sqlite3Pragma(
          zState = azLockName[j];
       }
       sqlite3VdbeMultiLoad(v, 1, "ss", db->aDb[i].zDbSName, zState);
-      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
     }
     break;
   }

src/vdbeaux.c

@@ -242,6 +242,9 @@ int sqlite3VdbeLoadString(Vdbe *p, int iDest, const char *zStr){
 ** "s" character in zTypes[], the register is a string if the argument is
 ** not NULL, or OP_Null if the value is a null pointer.  For each "i" character
 ** in zTypes[], the register is initialized to an integer.
+**
+** If the input string does not end with "X" then an OP_ResultRow instruction
+** is generated for the values inserted.
 */
 void sqlite3VdbeMultiLoad(Vdbe *p, int iDest, const char *zTypes, ...){
   va_list ap;
@@ -251,12 +254,15 @@ void sqlite3VdbeMultiLoad(Vdbe *p, int iDest, const char *zTypes, ...){
   for(i=0; (c = zTypes[i])!=0; i++){
     if( c=='s' ){
       const char *z = va_arg(ap, const char*);
-      sqlite3VdbeAddOp4(p, z==0 ? OP_Null : OP_String8, 0, iDest++, 0, z, 0);
+      sqlite3VdbeAddOp4(p, z==0 ? OP_Null : OP_String8, 0, iDest+i, 0, z, 0);
+    }else if( c=='i' ){
+      sqlite3VdbeAddOp2(p, OP_Integer, va_arg(ap, int), iDest+i);
     }else{
-      assert( c=='i' );
-      sqlite3VdbeAddOp2(p, OP_Integer, va_arg(ap, int), iDest++);
+      goto skip_op_resultrow;
     }
   }
+  sqlite3VdbeAddOp2(p, OP_ResultRow, iDest, i);
+skip_op_resultrow:
   va_end(ap);
 }