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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].

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FossilOrigin-Name: 6e79505df915612b60696e4eec5c9973175fe6ecf273eb3152b996e63ae54a07
This commit is contained in:
stephan
2023-05-25 16:49:06 +00:00
parent 4e8e33ba84
commit 39bd6a0d46
5 changed files with 47 additions and 20 deletions
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19
ext/wasm/api/sqlite3-api-worker1.js
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@@ -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