Kotlin Exposed batch insert not working as documented - kotlin-exposed

Question

I am trying to batch insert records into an SQL table using Kotlin Exposed. I have set up the code as per the Exposed documentation, however, the SQL statements being executed are individual insert statements rather than 1 batch insert statement.
The documentation located here: https://github.com/JetBrains/Exposed/wiki/DSL
has the following on Batch Inserting:
Batch Insert
Batch Insert allow mapping a list of entities into DB raws in one sql statement. It is more efficient than inserting one by one as it initiates only one statement. Here is an example:
val cityNames = listOf("Paris", "Moscow", "Helsinki")
val allCitiesID = cities.batchInsert(cityNames) { name ->
this[cities.name] = name
}
My code is as follows:
val mappings: List<Triple<String, String, String>> = listOf(triple1, triple2, triple3)
transaction {
TableName.batchInsert(mappings) {
this[TableName.value1] = it.first
this[TableName.value2] = it.second
this[TableName.value3] = it.third
}
}
What I expect to see printed out is 1 batch insert statement which follows the syntax of
INSERT INTO TableName (value1, value2, value3) values
(triple1value1, triple1value2, triple1value3),
(triple2value1, triple2value2, triple2value3),
(triple3value1, triple3value2, triple3value3), ...
but instead it prints 3 individual insert statements with the following syntax
INSERT INTO TableName (value1, value2, value3) values (triple1value1, triple1value2, triple1value3)
INSERT INTO TableName (value1, value2, value3) values (triple2value1, triple2value2, triple2value3)
INSERT INTO TableName (value1, value2, value3) values (triple3value1, triple3value2, triple3value3)
As this seems like the documented correct way to batch insert, what am I doing incorrectly here?

Answer 1

The docs explain:
NOTE: The batchInsert function will still create multiple INSERT
statements when interacting with your database. You most likely want
to couple this with the rewriteBatchedInserts=true (or
rewriteBatchedStatements=true) option of your relevant JDBC driver,
which will convert those into a single bulkInsert. You can find the
documentation for this option for MySQL here and PostgreSQL here.
https://github.com/JetBrains/Exposed/wiki/DSL#batch-insert