MySQL error `HistoryTreeNode`s `batch_get` about akd

[slawlor]

The get_batch_create_temp_table function has some mismatching type information from the rest of the MySQL implementation.

It should read something like

fn get_batch_create_temp_table<St: Storable>() -> Option<String> {
        match St::data_type() {
            StorageType::Azks => None,
            StorageType::HistoryNodeState => {
                Some(
                    format!(
                        "CREATE TEMPORARY TABLE `{}`(`label_len` INT UNSIGNED NOT NULL, `label_val` VARBINARY(32) NOT NULL, `epoch` BIGINT UNSIGNED NOT NULL, PRIMARY KEY(`label_len`, `label_val`, `epoch`))",
                        TEMP_IDS_TABLE
                    )
                )
            },
            StorageType::HistoryTreeNode => {
                Some(
                    format!(
                        "CREATE TEMPORARY TABLE `{}`(`label_len` INT UNSIGNED NOT NULL, `label_val` VARBINARY(32) NOT NULL, PRIMARY KEY(`label_len`, `label_val`))",
                        TEMP_IDS_TABLE
                    )
                )
            },
            StorageType::ValueState => {
                Some(
                    format!(
                        "CREATE TEMPORARY TABLE `{}`(`username` VARCHAR(256) NOT NULL, `epoch` BIGINT UNSIGNED NOT NULL, PRIMARY KEY(`username`, `epoch`))",
                        TEMP_IDS_TABLE
                    )
                )
            },
        }
    }

[slawlor]

I think we're resolved on this no?