Improved comment field in the bytecode generated for OP_Column and OP_Rowid.

FossilOrigin-Name: 009bbf8026106c5a74cced06cced48badb870a4b6e6a2f8104a544d2a8d79e45

manifest

@@ -1,5 +1,5 @@
-C New\sRIGHT\sJOIN\stest\scases,\sone\sof\swhich\sis\scurrently\sfailing.
-D 2022-04-18T13:08:17.738
+C Improved\scomment\sfield\sin\sthe\sbytecode\sgenerated\sfor\sOP_Column\sand\sOP_Rowid.
+D 2022-04-18T13:57:57.631
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -503,7 +503,7 @@ F src/date.c 15082566229d4b1e5f24fdb490bf9bcc68824b911d70e3573ef075a1b9e2d26f
 F src/dbpage.c 90661a87e1db8bfbc8d2ebbdcd3749651ddb287c555c07a28fb17c7c591ffb68
 F src/dbstat.c 861e08690fcb0f2ee1165eff0060ea8d4f3e2ea10f80dab7d32ad70443a6ff2d
 F src/delete.c a8e844af211a48b13b5b358be77a12c860c6a557c21990ad51a548e2536500ce
-F src/expr.c efde3f5034b94999ce34458ddcc43d9a82de7b43cf3a0d377b74585af7f140a1
+F src/expr.c 0714987d576d13acb64630274677ff0df336013bf83dfc1ff24a339b8ae2ae81
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c 94927f9b46d72a9cb858c208febf04ceb0a3270c5fa5fd0b7f436cf16e09f72a
 F src/func.c a3407a6fbb0d4088d8d502e46f0ace63e0aeae7467ae23a9ca9815bbf9239761
@@ -624,11 +624,11 @@ F src/upsert.c 8789047a8f0a601ea42fa0256d1ba3190c13746b6ba940fe2d25643a7e991937
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c 602fe229f32a96ceccae4f40824129669582096f7c355f53dbac156c9fecef23
 F src/vacuum.c 6c38ddc52f0619865c91dae9c441d4d48bf3040d7dc1bc5b22da1e45547ed0b3
-F src/vdbe.c 1b48646ce4824b4e3aa31b1aa278200b87b4218fedc2f606a25f1a467a978c87
+F src/vdbe.c 4efdce17535c925a040cf289bef12e12f7be9e2e02825c67db52c4e8723b89fb
 F src/vdbe.h 89f5edb1422c8783a0b29db836e409876f2b3e847f78e2b21b1fbcc48a93f85f
 F src/vdbeInt.h ef43f7fdc5fde29fc3fd29c506c12830f366178fdb4edbbf0cbc3dfbd1278b5f
 F src/vdbeapi.c 354c893f1500cf524cc45c32879b9c68893a28b77e3442c24668d6afe4236217
-F src/vdbeaux.c c1718405a9ce07d84adc5bc36e17016f73170de1015d818bc82ebfdf76d88bad
+F src/vdbeaux.c d1fce1d9c1045622d2a878ddcbec1c431eb186a17674b64ffe231e8d14db0451
 F src/vdbeblob.c 5e61ce31aca17db8fb60395407457a8c1c7fb471dde405e0cd675974611dcfcd
 F src/vdbemem.c 7189090b72baa025f945a1ac8c61ee420c645254476e8a191d555db76dfea5d4
 F src/vdbesort.c 43756031ca7430f7aec3ef904824a7883c4ede783e51f280d99b9b65c0796e35
@@ -1948,8 +1948,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 829d49f27c041651ffeadc1397e4dd87a9994c9290e13b93542dbd2c514769cd
-R 6347c73ed0e7137db9741231b5b4504b
+P 9168cbbedd1c9d735279295a78212d830e24269f6d7e445e71faa2c06973223d
+R a4c354da2123e1486588766b1d4b51f3
 U drh
-Z e66211318cb81105e5a2b7fa53682c62
+Z 78587092c64ce3133bf29634c7d55b8b
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-9168cbbedd1c9d735279295a78212d830e24269f6d7e445e71faa2c06973223d
+009bbf8026106c5a74cced06cced48badb870a4b6e6a2f8104a544d2a8d79e45

src/expr.c

@@ -3742,6 +3742,7 @@ void sqlite3ExprCodeGetColumnOfTable(
   }
   if( iCol<0 || iCol==pTab->iPKey ){
     sqlite3VdbeAddOp2(v, OP_Rowid, iTabCur, regOut);
+    VdbeComment((v, "%s.rowid", pTab->zName));
   }else{
     int op;
     int x;

src/vdbe.c

@@ -2679,7 +2679,7 @@ case OP_Offset: {          /* out3 */
 #endif /* SQLITE_ENABLE_OFFSET_SQL_FUNC */
 
 /* Opcode: Column P1 P2 P3 P4 P5
-** Synopsis: r[P3]=PX
+** Synopsis: r[P3]=PX cursor P1 column P2
 **
 ** Interpret the data that cursor P1 points to as a structure built using
 ** the MakeRecord instruction.  (See the MakeRecord opcode for additional
@@ -5761,7 +5761,7 @@ case OP_RowData: {
 }
 
 /* Opcode: Rowid P1 P2 * * *
-** Synopsis: r[P2]=rowid
+** Synopsis: r[P2]=PX rowid of P1
 **
 ** Store in register P2 an integer which is the key of the table entry that
 ** P1 is currently point to.

src/vdbeaux.c

@@ -1490,8 +1490,13 @@ char *sqlite3VdbeDisplayComment(
         if( c=='4' ){
           sqlite3_str_appendall(&x, zP4);
         }else if( c=='X' ){
-          sqlite3_str_appendall(&x, pOp->zComment);
+          if( pOp->zComment && pOp->zComment[0] ){
+            sqlite3_str_appendall(&x, pOp->zComment);
+          }else{
+            sqlite3_str_appendall(&x, zSynopsis+1);
+          }
           seenCom = 1;
+          break;
         }else{
           int v1 = translateP(c, pOp);
           int v2;