Remove unused elements from the json_tree() cursor.

FossilOrigin-Name: 914a50117d477b2cd30d58388fb8d1b71ff7ff6842ba025f38efc6e9647d06d0

manifest

@@ -1,5 +1,5 @@
-C Remove\sthe\svestigal\sJsonNode\slogic\sfrom\sjson_tree()\sand\sjson_each().
-D 2023-11-25T20:59:03.008
+C Remove\sunused\selements\sfrom\sthe\sjson_tree()\scursor.
+D 2023-11-25T23:00:50.622
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -688,7 +688,7 @@ F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
 F src/hwtime.h f9c2dfb84dce7acf95ce6d289e46f5f9d3d1afd328e53da8f8e9008e3b3caae6
 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c 3f0a94082d978bbdd33c38fefea15346c6c6bffb70bc645a71dc0f1f87dd3276
-F src/json.c 211c4e1b8fd886c97d3224105bfef9d4cc04db2e3f1daca1e95c52343df4e85c
+F src/json.c 7bd0d3809b31e32ffa053ba68cf03f67121f6bdd0be7031e8d4c761bef9b6aee
 F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 F src/loadext.c 7432c944ff197046d67a1207790a1b13eec4548c85a9457eb0896bb3641dfb36
 F src/main.c 1b89f3de98d1b59fec5bac1d66d6ece21f703821b8eaa0d53d9604c35309f6f9
@@ -2145,8 +2145,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 92258246916a9c0d72785964513113848a850dec78bdade8b3f274e410df4e7e
-R 43fba60a847876455ec8abde78205ef3
+P 66c2ab9ebbf90477742e6be0d30e061d827c409de038f2a5b73479ed9448c4a6
+R 79cb22ebedffb4f5b0a0989ee5c920ed
 U drh
-Z d0660c039b12ecd1fe4ffd828711a405
+Z b95c9f50e6b9041cf41818958255b068
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-66c2ab9ebbf90477742e6be0d30e061d827c409de038f2a5b73479ed9448c4a6
+914a50117d477b2cd30d58388fb8d1b71ff7ff6842ba025f38efc6e9647d06d0

src/json.c

@@ -5540,16 +5540,14 @@ typedef struct JsonEachCursor JsonEachCursor;
 struct JsonEachCursor {
   sqlite3_vtab_cursor base;  /* Base class - must be first */
   u32 iRowid;                /* The rowid */
-  u32 iBegin;                /* The first node of the scan */
   u32 i;                     /* Index in sParse.aBlob[] of current row */
   u32 iEnd;                  /* EOF when i equals or exceeds this value */
+  u32 nRoot;                 /* Size of the root argument in bytes */
   u8 eType;                  /* Type of the container for element i */
   u8 bRecursive;             /* True for json_tree().  False for json_each() */
   u32 nParent;               /* Current nesting depth */
   u32 nParentAlloc;          /* Space allocated for aParent[] */
   JsonParent *aParent;       /* Parent elements of i */
-  char *zJson;               /* Input JSON */
-  char *zRoot;               /* Path by which to filter zJson */
   sqlite3 *db;               /* Database connection */
   JsonString path;           /* Current path */
   JsonParse sParse;          /* Parse of the input JSON */
@@ -5638,7 +5636,6 @@ static int jsonEachOpenTree(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
 /* Reset a JsonEachCursor back to its original state.  Free any memory
 ** held. */
 static void jsonEachCursorReset(JsonEachCursor *p){
-  sqlite3_free(p->zRoot);
   jsonParseReset(&p->sParse);
   jsonStringReset(&p->path);
   sqlite3DbFree(p->db, p->aParent);
@@ -5649,8 +5646,6 @@ static void jsonEachCursorReset(JsonEachCursor *p){
   p->nParentAlloc = 0;
   p->iEnd = 0;
   p->eType = 0;
-  p->zJson = 0;
-  p->zRoot = 0;
 }
 
 /* Destructor for a jsonEachCursor object */
@@ -5839,9 +5834,7 @@ static int jsonEachColumn(
       break;
     }
     default: {
-      const char *zRoot = p->zRoot;
-      if( zRoot==0 ) zRoot = "$";
-      sqlite3_result_text(ctx, zRoot, -1, SQLITE_STATIC);
+      sqlite3_result_text(ctx, p->path.zBuf, p->nRoot, SQLITE_STATIC);
       break;
     }
     case JEACH_JSON: {
@@ -5956,6 +5949,7 @@ static int jsonEachFilter(
     if( p->sParse.aBlob==0 ){
       return SQLITE_NOMEM;
     }
+    p->sParse.isBinary = 1;
   }else{
     p->sParse.zJson = (char*)sqlite3_value_text(argv[0]);
     p->sParse.nJson = sqlite3_value_bytes(argv[0]);
@@ -6001,8 +5995,8 @@ static int jsonEachFilter(
     p->eType = 0;
     jsonAppendRaw(&p->path, "$", 1);
   }
+  p->nRoot = p->path.nUsed;
   p->nParent = 0;
-  p->sParse.isBinary = 1;
   n = jsonbPayloadSize(&p->sParse, i, &sz);
   p->iEnd = i+n+sz;
   if( (p->sParse.aBlob[i] & 0x0f)>=JSONB_ARRAY && !p->bRecursive ){