Optimize queries against fts5vocab(row) tables that do use the "cnt" column.

FossilOrigin-Name: 96a591c202cb4218999ece3de063bf466b6fd81bd23383893f3913ecb52dda36

3 files changed, 17 insertions, 9 deletions

diff --git a/ext/fts5/fts5_vocab.c b/ext/fts5/fts5_vocab.c
index f0730ff38..fb280567f 100644
--- a/ext/fts5/fts5_vocab.c
+++ b/ext/fts5/fts5_vocab.c
@@ -533,8 +533,16 @@ static int fts5VocabNextMethod(sqlite3_vtab_cursor *pCursor){
             /* Do not bother counting the number of instances if the "cnt"
             ** column is not being read (according to colUsed).  */
             if( eDetail==FTS5_DETAIL_FULL && (pCsr->colUsed & 0x04) ){
-              while( 0==sqlite3Fts5PoslistNext64(pPos, nPos, &iOff, &iPos) ){
-                pCsr->aCnt[0]++;
+              while( iPos<nPos ){
+                u32 ii;
+                fts5FastGetVarint32(pPos, iPos, ii);
+                if( ii==1 ){ 
+                  /* New column in the position list */
+                  fts5FastGetVarint32(pPos, iPos, ii);
+                }else{
+                  /* An instance - increment pCsr->aCnt[] */
+                  pCsr->aCnt[0]++;
+                }
               }
             }
             pCsr->aDoc[0]++;
diff --git a/manifest b/manifest
index e40addb45..ce12661db 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Avoid\scalculating\sthe\svalue\sof\sthe\s"cnt"\scolumn\sfor\sfts5vocab(row)\squeries\sthat\sdo\snot\suse\sit.
-D 2024-05-14T19:09:54.416
+C Optimize\squeries\sagainst\sfts5vocab(row)\stables\sthat\sdo\suse\sthe\s"cnt"\scolumn.
+D 2024-05-14T19:41:19.118
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -108,7 +108,7 @@ F ext/fts5/fts5_test_tok.c 3cb0a9b508b30d17ef025ccddd26ae3dc8ddffbe76c057616e59a
 F ext/fts5/fts5_tokenize.c fa5493075101540270f572038fc1723d44fcc97bfbf237c8530013b8a27860be
 F ext/fts5/fts5_unicode2.c eca63dbc797f8ff0572e97caf4631389c0ab900d6364861b915bdd4735973f00
 F ext/fts5/fts5_varint.c e64d2113f6e1bfee0032972cffc1207b77af63319746951bf1d09885d1dadf80
-F ext/fts5/fts5_vocab.c faa8c6d8e0102037694165734a46b94d06f4460bde797af7486ed62c05764e35
+F ext/fts5/fts5_vocab.c e4830b00809e5da53bc10f93adc59e321407b0f801c7f4167c0e47f5552267e0
 F ext/fts5/fts5parse.y eb526940f892ade5693f22ffd6c4f2702543a9059942772526eac1fde256bb05
 F ext/fts5/mkportersteps.tcl 5acf962d2e0074f701620bb5308155fa1e4a63ba
 F ext/fts5/test/fts5_common.tcl 3378732aae2a7d9a4b9b5c40bde678d4259ca16bd490883325aecc4747bcb384
@@ -2190,8 +2190,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P ca4fdcb8ae95d2a61236b949f852d2bf25ea2dbbff7eedafbd8eb84e8fd96687
-R 17e05953d472a335ac30c411c88ba602
+P c0c91e306c252ce1b398e92ab958e2a3de0fc43db05cfdffc548380654fc9f13
+R c8ee37ea6d4a33968236083c174d19e7
 U dan
-Z 6157f839a4ddd69a6600b93afee6568d
+Z 493cbd0a2ca537422c58bc5b9554c10a
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 125d507b0..84c463d5a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-c0c91e306c252ce1b398e92ab958e2a3de0fc43db05cfdffc548380654fc9f13
\ No newline at end of file
+96a591c202cb4218999ece3de063bf466b6fd81bd23383893f3913ecb52dda36
\ No newline at end of file