Add ability for the JS Worker1.exec() API to report the number of changes made to the caller, per request in [forum:d0b19483642e20dd | forum post d0b19483642e20dd].

FossilOrigin-Name: 6e79505df915612b60696e4eec5c9973175fe6ecf273eb3152b996e63ae54a07

ext/wasm/api/sqlite3-api-worker1.js

@@ -278,6 +278,19 @@
   The arguments are in the same form accepted by oo1.DB.exec(), with
   the exceptions noted below.
 
+  If the `countChanges` arguments property (added in version 3.43) is
+  truthy then the `result` property contained by the returned object
+  will have a `changeCount` property which holds the number of changes
+  made by the provided SQL. Because the SQL may contain an arbitrary
+  number of statements, the `changeCount` is calculated by calling
+  `sqlite3_total_changes()` before and after the SQL is evaluated. If
+  the value of `countChanges` is 64 then the `changeCount` property
+  will be returned as a 64-bit integer in the form of a BigInt (noting
+  that that will trigger an exception if used in a BigInt-incapable
+  build).  In the latter case, the number of changes is calculated by
+  calling `sqlite3_total_changes64()` before and after the SQL is
+  evaluated.
+
   A function-type args.callback property cannot cross
   the window/Worker boundary, so is not useful here. If
   args.callback is a string then it is assumed to be a
@@ -523,7 +536,13 @@ sqlite3.initWorker1API = function(){
         }
       }
       try {
+        const changeCount = !!rc.countChanges
+              ? db.changes(true,(64===rc.countChanges))
+              : undefined;
         db.exec(rc);
+        if(undefined !== changeCount){
+          rc.changeCount = db.changes(true,64===rc.countChanges) - changeCount;
+        }
         if(rc.callback instanceof Function){
           rc.callback = theCallback;
           /* Post a sentinel message to tell the client that the end

ext/wasm/api/sqlite3-worker1-promiser.c-pp.js

@@ -196,10 +196,9 @@ globalThis.sqlite3Worker1Promiser = function callee(config = callee.defaultConfi
     if(1===arguments.length){
       msg = arguments[0];
     }else if(2===arguments.length){
-      msg = {
-        type: arguments[0],
-        args: arguments[1]
-      };
+      msg = Object.create(null);
+      msg.type = arguments[0];
+      msg.args = arguments[1];
     }else{
       toss("Invalid arugments for sqlite3Worker1Promiser()-created factory.");
     }

ext/wasm/demo-worker1-promiser.js

@@ -64,15 +64,17 @@
       callback = msgArgs;
       msgArgs = undefined;
     }
-    const p = workerPromise({type: msgType, args:msgArgs});
+    const p = 1
+          ? workerPromise({type: msgType, args:msgArgs})
+          : workerPromise(msgType, msgArgs);
     return callback ? p.then(callback).finally(testCount) : p;
   };
 
+  let sqConfig;
   const runTests = async function(){
     const dbFilename = '/testing2.sqlite3';
     startTime = performance.now();
 
-    let sqConfig;
     await wtest('config-get', (ev)=>{
       const r = ev.result;
       log('sqlite3.config subset:', r);
@@ -102,11 +104,15 @@
       sql: ["create table t(a,b)",
             "insert into t(a,b) values(1,2),(3,4),(5,6)"
            ].join(';'),
-      resultRows: [], columnNames: []
+      resultRows: [], columnNames: [],
+      countChanges: sqConfig.bigIntEnabled ? 64 : true
     }, function(ev){
       ev = ev.result;
       T.assert(0===ev.resultRows.length)
-        .assert(0===ev.columnNames.length);
+        .assert(0===ev.columnNames.length)
+        .assert(sqConfig.bigIntEnabled
+                ? (3n===ev.changeCount)
+                : (3===ev.changeCount));
     });
 
     await wtest('exec',{
@@ -124,12 +130,14 @@
     await wtest('exec',{
       sql: 'select a a, b b from t order by a',
       resultRows: [], columnNames: [],
-      rowMode: 'object'
+      rowMode: 'object',
+      countChanges: true
     }, function(ev){
       ev = ev.result;
       T.assert(3===ev.resultRows.length)
         .assert(1===ev.resultRows[0].a)
         .assert(6===ev.resultRows[2].b)
+        .assert(0===ev.changeCount);
     });
 
     await wtest(
@@ -142,12 +150,13 @@
 
     await wtest('exec',{
       sql:'select 1 union all select 3',
-      resultRows: [],
+      resultRows: []
     }, function(ev){
       ev = ev.result;
       T.assert(2 === ev.resultRows.length)
         .assert(1 === ev.resultRows[0][0])
-        .assert(3 === ev.resultRows[1][0]);
+        .assert(3 === ev.resultRows[1][0])
+        .assert(undefined === ev.changeCount);
     });
 
     const resultRowTest1 = function f(ev){

manifest

@@ -1,5 +1,5 @@
-C Minor\scleanups\sin\sdemo\sJS\scode,\sper\sforum\sfeedback.
-D 2023-05-23T19:11:42.778
+C Add\sability\sfor\sthe\sJS\sWorker1.exec()\sAPI\sto\sreport\sthe\snumber\sof\schanges\smade\sto\sthe\scaller,\sper\srequest\sin\s[forum:d0b19483642e20dd\s|\sforum\spost\sd0b19483642e20dd].
+D 2023-05-25T16:49:06.244
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@@ -496,14 +496,14 @@ F ext/wasm/api/sqlite3-api-cleanup.js cc21e3486da748463e02bbe51e2464c6ac136587cd
 F ext/wasm/api/sqlite3-api-glue.js f1b2dcb944de5138bb5bd9a1559d2e76a4f3ec25260963d709e8237476688803
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+F ext/wasm/api/sqlite3-api-worker1.js 9f32af64df1a031071912eea7a201557fe39b1738645c0134562bb84e88e2fec
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 F ext/wasm/api/sqlite3-wasm.c 12a096d8e58a0af0589142bae5a3c27a0c7e19846755a1a37d2c206352fbedda
-F ext/wasm/api/sqlite3-worker1-promiser.c-pp.js 2710a06a59620c6bf7ce298ab1fb6c9ce825b9f9379728b74c486db6613beecc
+F ext/wasm/api/sqlite3-worker1-promiser.c-pp.js bc06df0d599e625bde6a10a394e326dc68da9ff07fa5404354580f81566e591f
 F ext/wasm/api/sqlite3-worker1.c-pp.js da509469755035e919c015deea41b4514b5e84c12a1332e6cc8d42cb2cc1fb75
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 F ext/wasm/batch-runner.js 0dad6a02ad796f1003d3b7048947d275c4d6277f63767b8e685c27df8fdac93e
@@ -518,7 +518,7 @@ F ext/wasm/demo-123.js ebae30756585bca655b4ab2553ec9236a87c23ad24fc8652115dcedb0
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 F ext/wasm/demo-worker1-promiser.html 1de7c248c7c2cfd4a5783d2aa154bce62d74c6de98ab22f5786620b3354ed15f
-F ext/wasm/demo-worker1-promiser.js 85eec29b69ae9284ca8f92906649bad59c6e89ef8c8bef1c54534d198cd1f071
+F ext/wasm/demo-worker1-promiser.js 5e5c7d7c91cd7aae9cc733afd02569ba9c6928292db413b550e8b842f4b75e87
 F ext/wasm/demo-worker1.html 2c178c1890a2beb5a5fecb1453e796d067a4b8d3d2a04d65ca2eb1ab2c68ef5d
 F ext/wasm/demo-worker1.js 836bece8615b17b1b572584f7b15912236a5947fe8c68b98d2737d7e287447ef
 F ext/wasm/dist.make 451fb1b732257849f6e898d2a862512a0401500ed369ef53bdfeddf9c77bc3b9
@@ -2070,8 +2070,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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-R b5cd104f39e80fbc323dabc926386ff4
+P 80c7c0360c08bea0733deccb8071920c60558b75df76b6afad093c82adf30ea6
+R e8fcc223cacf06d978c3812fcacaa2db
 U stephan
-Z 4cd5f002fb22229311c9795f8929c3b5
+Z 4c26ba95f98d5f81d88f07b72f4945f7
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-80c7c0360c08bea0733deccb8071920c60558b75df76b6afad093c82adf30ea6
+6e79505df915612b60696e4eec5c9973175fe6ecf273eb3152b996e63ae54a07