Change vdbeSorterExtendFile() so that it makes a best effort to create the

PMA file of the desired size, but does not return an error if unable.

FossilOrigin-Name: 217814bc4b53fab7bdad433e24e8aef8998c38fe

manifest

@@ -1,5 +1,5 @@
-C Merge\sall\srecent\schanges\sfrom\strunk.
-D 2014-04-03T16:42:21.478
+C Change\svdbeSorterExtendFile()\sso\sthat\sit\smakes\sa\sbest\seffort\sto\screate\sthe\nPMA\sfile\sof\sthe\sdesired\ssize,\sbut\sdoes\snot\sreturn\san\serror\sif\sunable.
+D 2014-04-04T02:13:26.507
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in ad0921c4b2780d01868cf69b419a4f102308d125
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -286,7 +286,7 @@ F src/vdbeapi.c 0ed6053f947edd0b30f64ce5aeb811872a3450a4
 F src/vdbeaux.c d8dc38965507a34b0e150c0d7fc82b02f8cf25ea
 F src/vdbeblob.c 15377abfb59251bccedd5a9c7d014a895f0c04aa
 F src/vdbemem.c 6fc77594c60f6155404f3f8d71bf36d1fdeb4447
-F src/vdbesort.c 252d7ab7620649945b53289510a172bc73133f17
+F src/vdbesort.c 8da916fc74e78edd5bc95653206942e01710ac09
 F src/vdbetrace.c 6f52bc0c51e144b7efdcfb2a8f771167a8816767
 F src/vtab.c 21b932841e51ebd7d075e2d0ad1415dce8d2d5fd
 F src/wal.c 76e7fc6de229bea8b30bb2539110f03a494dc3a8
@@ -1161,7 +1161,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 9d3351b8d713232133dad149c73fb2a27c72abb1 d5513dfa23baa0b0a095aaf17d19aacd30dcef61
-R 6137d1586a278eeecb535398f89aa582
+P a0910079adde95245680dee59b43613b60903f10
+R ae0d06309ee79fa9e2b8e2b495c941f2
 U drh
-Z 41afe239279763eb22b85c89d966d688
+Z 2dc7a665c4d0ee5a145d17c4c35dd575

manifest.uuid

@@ -1 +1 @@
-a0910079adde95245680dee59b43613b60903f10
+217814bc4b53fab7bdad433e24e8aef8998c38fe

src/vdbesort.c

@@ -1017,17 +1017,15 @@ static void vdbePmaWriteVarint(PmaWriter *p, u64 iVal){
 ** Whether or not the file does end up memory mapped of course depends on
 ** the specific VFS implementation.
 */
-static int vdbeSorterExtendFile(sqlite3 *db, sqlite3_file *pFile, i64 nByte){
-  int rc = SQLITE_OK;
+static void vdbeSorterExtendFile(sqlite3 *db, sqlite3_file *pFile, i64 nByte){
   if( nByte<=(i64)(db->nMaxSorterMmap) ){
-    rc = sqlite3OsTruncate(pFile, nByte);
+    int rc = sqlite3OsTruncate(pFile, nByte);
     if( rc==SQLITE_OK ){
       void *p = 0;
       sqlite3OsFetch(pFile, 0, nByte, &p);
       sqlite3OsUnfetch(pFile, 0, p);
     }
   }
-  return rc;
 }
 #else
 # define vdbeSorterExtendFile(x,y,z) SQLITE_OK
@@ -1064,7 +1062,7 @@ static int vdbeSorterListToPMA(SortSubtask *pTask){
 
   /* Try to get the file to memory map */
   if( rc==SQLITE_OK ){
-    rc = vdbeSorterExtendFile(pTask->db, 
+    vdbeSorterExtendFile(pTask->db, 
         pTask->pTemp1, pTask->iTemp1Off + pTask->nInMemory + 9
     );
   }
@@ -1213,16 +1211,15 @@ static void *vdbeSortSubtaskMain(void *pCtx){
       /* Open a second temp file to write merged data to */
       rc = vdbeSorterOpenTempFile(pTask->db->pVfs, &pTemp2);
       if( rc==SQLITE_OK ){
-        rc = vdbeSorterExtendFile(pTask->db, pTemp2, pTask->iTemp1Off);
-      }
-      if( rc!=SQLITE_OK ){
+        vdbeSorterExtendFile(pTask->db, pTemp2, pTask->iTemp1Off);
+      }else{
         vdbeMergeEngineFree(pMerger);
         break;
       }
 
       /* This loop runs once for each output PMA. Each output PMA is made
       ** of data merged from up to SORTER_MAX_MERGE_COUNT input PMAs. */
-      for(i=0; i<pTask->nPMA; i+=SORTER_MAX_MERGE_COUNT){
+      for(i=0; rc==SQLITE_OK && i<pTask->nPMA; i+=SORTER_MAX_MERGE_COUNT){
         PmaWriter writer;         /* Object for writing data to pTemp2 */
         i64 nOut = 0;             /* Bytes of data in output PMA */
         int bEof = 0;