node:sqlite: DatabaseSync.function wrapper for sqlite3_create_function_v2 should allow use of xStep and xFinal parameters

[turbocrime]

i want to create user-defined aggregate functions when using my sqlite database. sqlite expects aggregate functions to be defined with the same api as typical user-defined functions, plus additional aggregation parameters.

node:sqlite provides access to the sqlite function definition api with a wrapper for sqlite3_create_function_v2 as the instance method DatabaseSync.function

but, this wrapper always passes null for the aggregation parameter refs.

node/src/node_sqlite.cc

Lines 669 to 677 in 3b5f235

	int r = sqlite3_create_function_v2(db->connection_,
	*name,
	argc,
	text_rep,
	user_data,
	UserDefinedFunction::xFunc,
	nullptr,
	nullptr,
	UserDefinedFunction::xDestroy);

implementation suggestions

• a separate wrapper function, possibly called aggregate or reduce, for user-defined functions that use these additional callback parameters
• optional parameters for function that accept the callbacks, in the same order as the sqlite api
• additional attributes on the function options parameter object

[turbocrime]

i created this issue from the line highlight menu on node_sqlite.cc, so i didn't get the template prompt or label selection. sorry if this is out-of-order

[cjihrig]

a separate wrapper function, possibly called aggregate or reduce, for user-defined functions that use these additional callback parameters

That is the plan - similar to how it is done in better-sqlite3.

[turbocrime]

is there a place for collected discussion and public work on this builtin?

[cjihrig]

Not that I am aware of.