Enhance oo1.DB.exec() to simplify returning whole result sets.

FossilOrigin-Name: 7b168ee2af09f04b41a6ef4c14ccaddc0c9b0bfe9dc1e6a86d8f5317606bd78d

ext/wasm/api/sqlite3-api-oo1.js

@@ -422,6 +422,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
         default:
           toss3("Invalid returnValue value:",opt.returnValue);
     }
+    if(!opt.callback && !opt.returnValue && undefined!==opt.rowMode){
+      if(!opt.resultRows) opt.resultRows = [];
+      out.returnVal = ()=>opt.resultRows;
+    }
     if(opt.callback || opt.resultRows){
       switch((undefined===opt.rowMode)
              ? 'array' : opt.rowMode) {
@@ -770,8 +774,11 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
        - `returnValue`: is a string specifying what this function
        should return:
 
-         A) The default value is `"this"`, meaning that the
-            DB object itself should be returned.
+         A) The default value is (usually) `"this"`, meaning that the
+            DB object itself should be returned. The exceptions is if
+            the caller passes neither of `callback` nor `returnValue`
+            but does pass an explicit `rowMode` then the default
+            `returnValue` is `"resultRows"`, described below.
 
          B) `"resultRows"` means to return the value of the
             `resultRows` option. If `resultRows` is not set, this
@@ -791,9 +798,6 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
        - `callback` and `resultRows`: permit an array entries with
        semantics similar to those described for `bind` above.
 
-       - If passed neither a callback nor returnValue but is passed a
-         rowMode, default to returning the result set.
-
     */
     exec: function(/*(sql [,obj]) || (obj)*/){
       affirmDbOpen(this);

ext/wasm/tester1.c-pp.js

@@ -1412,14 +1412,26 @@ self.sqlite3InitModule = sqlite3InitModule;
                db.selectValue("SELECT "+Number.MIN_SAFE_INTEGER)).
         assert(Number.MAX_SAFE_INTEGER ===
                db.selectValue("SELECT "+Number.MAX_SAFE_INTEGER));
-
       counter = 0;
-      db.exec({
+      let rv = db.exec({
         sql: "SELECT a FROM t",
         callback: ()=>(1===++counter),
       });
-      T.assert(2===counter,
+      T.assert(db === rv)
+        .assert(2===counter,
                "Expecting exec step() loop to stop if callback returns false.");
+      /** If exec() is passed neither callback nor returnValue but
+          is passed an explicit rowMode then the default returnValue
+          is the whole result set, as if an empty resultRows option
+          had been passed. */
+      rv = db.exec({
+        sql: "SELECT -1 UNION ALL SELECT -2 UNION ALL SELECT -3 ORDER BY 1 DESC",
+        rowMode: 0
+      });
+      T.assert(Array.isArray(rv)).assert(3===rv.length)
+        .assert(-1===rv[0]).assert(-3===rv[2]);
+      rv = db.exec("SELECT 1 WHERE 0",{rowMode: 0});
+      T.assert(Array.isArray(rv)).assert(0===rv.length);
       if(wasm.bigIntEnabled && haveWasmCTests()){
         const mI = wasm.xCall('sqlite3_wasm_test_int64_max');
         const b = BigInt(Number.MAX_SAFE_INTEGER * 2);

ext/wasm/tests/opfs/concurrency/index.html

@@ -26,9 +26,8 @@
       workload with <code>interval=N</code> (milliseconds). Set the
       number of worker iterations with <code>iterations=N</code>.
       Enable OPFS VFS verbosity with <code>verbose=1-3</code> (output
-      goes to the dev console). Enable/disable "unlock ASAP" mode
-      (higher concurrency, lower speed)
-      with <code>unlock-asap=0-1</code>.
+      goes to the dev console). Disable/enable "unlock ASAP" mode
+      (higher concurrency, lower speed) with <code>unlock-asap=0-1</code>.
     </p>
     <p>Achtung: if it does not start to do anything within a couple of
       seconds, check the dev console: Chrome sometimes fails to load

manifest

@@ -1,5 +1,5 @@
-C Add\sJS\sbundler-friendly\sJS\sbuild.\sMinor\stest\scode\scleanups.
-D 2023-01-28T04:20:46.205
+C Enhance\soo1.DB.exec()\sto\ssimplify\sreturning\swhole\sresult\ssets.
+D 2023-01-28T05:09:26.765
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 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
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