I have a JavaScript object with multiple rows of data and I want to insert it into web sql database. Here is how my code looks like.
for(i in rows)
{
(function(row){
db.transaction(function(tx) {
tx.executeSql("INSERT INTO my_table (id, name, parent_id) VALUES (?, ?, ?)",
[ row.id, row.name, row.parent_id ], onSuccess, onError
);
});
})(rows[i]);
}
My questions about this are:
db.transaction
. Will it be better and why?INSERT
? Or I should not worry about this.This can be done by moving outer loop inside db.transaction. Will it be better and why?
yes. much better. 1) creating a transaction is not cheap. 2) looping async is generally bad .
Is it possible to add multiple rows in single query like multiple values in single MySQL INSERT? Or I should not worry about this.
don't worry. Multiple rows workaround are syntactic sugar. No performance benefit. Better loop it under one transaction.
Again do not loop executeSql, it is async.
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