Add updateHook, commitHook, and rollbackHook
#1337
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These new `Database` methods expose the functionality of `sqlite3_update_hook`, `sqlite3_commit_hook`, and `sqlite3_rollback_hook`, respectively.
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We're using these in our port of PowerSync to Node.js: |
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I'm happy to add documentation for these functions to |
| UpdateHook * self = static_cast<UpdateHook *>(data); | ||
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| v8::Isolate * isolate = self->isolate; | ||
| v8::Isolate::Scope isolateScope(isolate); |
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Using v8::Isolate::Scope is new to this library, and I'm not familiar with it. What does it do? And do you think it should be used in other similar situations (such as user-defined SQL functions, or the verbose hook)?
| db(db), | ||
| fn(isolate, fn) {} | ||
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| static void invoke(void * data, int op, char const * dbName, char const * tableName, sqlite3_int64 rowid) { |
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Since these hooks don't work with WITHOUT ROWID tables or with the truncate optimization, I think that should be called out in the docs.
| v8::Local<v8::Value> opArg = self->addon->cs.Op(isolate, op); | ||
| v8::Local<v8::Value> dbNameArg = v8::String::NewFromUtf8(isolate, dbName, v8::NewStringType::kNormal).ToLocalChecked(); | ||
| v8::Local<v8::Value> tableNameArg = v8::String::NewFromUtf8(isolate, tableName, v8::NewStringType::kNormal).ToLocalChecked(); | ||
| v8::Local<v8::Value> rowidArg = v8::BigInt::New(isolate, rowid); |
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It might be more appropriate to use v8::Number if safeIntegers is not enabled, as that would be consistent with the rest of the library's behavior. I think it should accept a safeIntegers option similarly to how db.function() works.
| 'use strict'; | ||
| const Database = require('../.'); | ||
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| describe('Database hooks', function () { |
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I'd like to see an additional test: attempting to use the database within a hook should fail, since the db is busy
These new
Databasemethods expose the functionality ofsqlite3_update_hook,sqlite3_commit_hook, andsqlite3_rollback_hook, respectively.