Update the generate_series() table-valued function to make use of the new

SQLITE_CONSTRAINT return from xBestIndex.

FossilOrigin-Name: 4372ad644dda5a1fa46b6b6070092320c835439b41f598cbc041e9deef786988

ext/misc/series.c

@@ -313,44 +313,44 @@ static int seriesBestIndex(
   sqlite3_vtab *tab,
   sqlite3_index_info *pIdxInfo
 ){
-  int i;                 /* Loop over constraints */
+  int i, j;              /* Loop over constraints */
   int idxNum = 0;        /* The query plan bitmask */
-  int startIdx = -1;     /* Index of the start= constraint, or -1 if none */
+  int unusableMask = 0;  /* Mask of unusable constraints */
-  int stopIdx = -1;      /* Index of the stop= constraint, or -1 if none */
-  int stepIdx = -1;      /* Index of the step= constraint, or -1 if none */
   int nArg = 0;          /* Number of arguments that seriesFilter() expects */
-
+  int aIdx[3];           /* Constraints on start, stop, and step */
   const struct sqlite3_index_constraint *pConstraint;
+
+  /* This implementation assumes that the start, stop, and step columns
+  ** are the last three columns in the virtual table. */
+  assert( SERIES_COLUMN_STOP == SERIES_COLUMN_START+1 );
+  assert( SERIES_COLUMN_STEP == SERIES_COLUMN_START+2 );
+  aIdx[0] = aIdx[1] = aIdx[2] = -1;
   pConstraint = pIdxInfo->aConstraint;
   for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
-    if( pConstraint->usable==0 ) continue;
+    int iCol;    /* 0 for start, 1 for stop, 2 for step */
-    if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
+    int iMask;   /* bitmask for those column */
-    switch( pConstraint->iColumn ){
+    if( pConstraint->iColumn<SERIES_COLUMN_START ) continue;
-      case SERIES_COLUMN_START:
+    iCol = pConstraint->iColumn - SERIES_COLUMN_START;
-        startIdx = i;
+    iMask = 1 << iCol;
-        idxNum |= 1;
+    if( pConstraint->usable==0 ){
-        break;
+      unusableMask |=  iMask;
-      case SERIES_COLUMN_STOP:
+      continue;
-        stopIdx = i;
+    }else if( pConstraint->op==SQLITE_INDEX_CONSTRAINT_EQ ){
-        idxNum |= 2;
+      idxNum |= iMask;
-        break;
+      aIdx[iCol] = i;
-      case SERIES_COLUMN_STEP:
-        stepIdx = i;
-        idxNum |= 4;
-        break;
     }
   }
-  if( startIdx>=0 ){
+  for(i=0; i<3; i++){
-    pIdxInfo->aConstraintUsage[startIdx].argvIndex = ++nArg;
+    if( (j = aIdx[i])>=0 ){
-    pIdxInfo->aConstraintUsage[startIdx].omit= !SQLITE_SERIES_CONSTRAINT_VERIFY;
+      pIdxInfo->aConstraintUsage[j].argvIndex = ++nArg;
+      pIdxInfo->aConstraintUsage[j].omit = !SQLITE_SERIES_CONSTRAINT_VERIFY;
+    }
   }
-  if( stopIdx>=0 ){
+  if( (unusableMask & ~idxNum)!=0 ){
-    pIdxInfo->aConstraintUsage[stopIdx].argvIndex = ++nArg;
+    /* The start, stop, and step columns are inputs.  Therefore if there
-    pIdxInfo->aConstraintUsage[stopIdx].omit = !SQLITE_SERIES_CONSTRAINT_VERIFY;
+    ** are unusable constraints on any of start, stop, or step then
-  }
+    ** this plan is unusable */
-  if( stepIdx>=0 ){
+    return SQLITE_CONSTRAINT;
-    pIdxInfo->aConstraintUsage[stepIdx].argvIndex = ++nArg;
-    pIdxInfo->aConstraintUsage[stepIdx].omit = !SQLITE_SERIES_CONSTRAINT_VERIFY;
   }
   if( (idxNum & 3)==3 ){
     /* Both start= and stop= boundaries are available.  This is the 
@@ -365,7 +365,6 @@ static int seriesBestIndex(
     /* If either boundary is missing, we have to generate a huge span
     ** of numbers.  Make this case very expensive so that the query
     ** planner will work hard to avoid it. */
-    pIdxInfo->estimatedCost = (double)2147483647;
     pIdxInfo->estimatedRows = 2147483647;
   }
   pIdxInfo->idxNum = idxNum;

manifest

@@ -1,5 +1,5 @@
-C In\sorder\sto\savoid\sexporting\sa\ssymbol,\suse\sa\smacro\sinstead\sof\sa\sfunction\sto\nreplace\ssqlite3_complete()\sin\sthe\sshell\scode\swhen\sSQLITE_OMIT_COMPLETE\sis\ndefined.
+C Update\sthe\sgenerate_series()\stable-valued\sfunction\sto\smake\suse\sof\sthe\snew\nSQLITE_CONSTRAINT\sreturn\sfrom\sxBestIndex.
-D 2018-11-16T14:36:42.078
+D 2018-11-16T15:08:31.923
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in b730006b54c990461d864c5387f2e6f13aadb0236804555fb010ed6865a5f058
@@ -296,7 +296,7 @@ F ext/misc/regexp.c a68d25c659bd2d893cd1215667bbf75ecb9dc7d4
 F ext/misc/remember.c add730f0f7e7436cd15ea3fd6a90fd83c3f706ab44169f7f048438b7d6baa69c
 F ext/misc/rot13.c 540a169cb0d74f15522a8930b0cccdcb37a4fd071d219a5a083a319fc6e8db77
 F ext/misc/scrub.c db9fff56fed322ca587d73727c6021b11ae79ce3f31b389e1d82891d144f22ad
-F ext/misc/series.c c7197db304f7009b08d6459a9de02e7f51ad0e1a3fdacbc1ebf5252a9a346959
+F ext/misc/series.c 2141a38d14b9b3256f372cdfe3bec8e611115815f3c7f7afb131cf1d68d78d91
 F ext/misc/sha1.c df0a667211baa2c0612d8486acbf6331b9f8633fd4d605c17c7cccd26d59c6bd
 F ext/misc/shathree.c 22ba7ca84a433d6466a7d05dcc876910b435a715da8cc462517db9351412b8c8
 F ext/misc/showauth.c 732578f0fe4ce42d577e1c86dc89dd14a006ab52
@@ -591,7 +591,7 @@ F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
 F src/wal.c 3f4f653daf234fe713edbcbca3fec2350417d159d28801feabc702a22c4e213f
 F src/wal.h 606292549f5a7be50b6227bd685fa76e3a4affad71bb8ac5ce4cb5c79f6a176a
 F src/walker.c fb94aadc9099ff9c6506d0a8b88d51266005bcaa265403f3d7caf732a562eb66
-F src/where.c 23f955de6db320fa5afcbe569687e649e5c9be1380c742fe7c5e9939e18cbcbe
+F src/where.c 053e5004a608195cf0345441a46274d318966b34b9c7c0033e6e1d8bc0833307
 F src/whereInt.h f125f29fca80890768e0b2caa14f95db74b2dacd3a122a168f97aa7b64d6968f
 F src/wherecode.c c45f03aefc2266b990df0fc4d7acc4e27f56f881f4fc0fc355b7cbc4d7189da5
 F src/whereexpr.c 491f0894ad9903750cdecb7894437a0cabdffdd88f574d2b1c9ac85d14fe4b9c
@@ -1778,7 +1778,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 684013cef6bfcfd920a4aec645df9f5d41ace8b34e75fca61759c1b4f82cc89e
+P d584a0cb512815945ef06ee3b5ebadbf2a543b008487f6d098e1e8ab79f61d2d
-R 8193ecf2adbc9160819a0d27025d0547
+R a216ab0261496ebce0502a9a5ca8d671
-U dan
+U drh
-Z 06b4c40afe20fcd6ade0db726d80955d
+Z 184170d79003d8b9b10ccf4765c179a2

manifest.uuid

@@ -1 +1 @@
-d584a0cb512815945ef06ee3b5ebadbf2a543b008487f6d098e1e8ab79f61d2d
+4372ad644dda5a1fa46b6b6070092320c835439b41f598cbc041e9deef786988

src/where.c

@@ -3140,6 +3140,7 @@ static int whereLoopAddVirtualOne(
       ** that the particular combination of parameters provided is unusable.
       ** Make no entries in the loop table.
       */
+      WHERETRACE(0xffff, ("  ^^^^--- non-viable plan rejected!\n"));
       return SQLITE_OK;
     }
     return rc;