import (
"context"
"io"
"time"
"cloud.google.com/go/spanner"
)
func parseTime(rfc3339Time string) time.Time {
t, _ := time.Parse(time.RFC3339, rfc3339Time)
return t
}
func insertGraphData(w io.Writer, db string) error {
ctx := context.Background()
client, err := spanner.NewClient(ctx, db)
if err != nil {
return err
}
defer client.Close()
// Values are inserted into the node and edge tables corresponding to
// using Spanner 'Insert' mutations.
// The tables and columns comply with the schema defined for the
// property graph 'FinGraph', comprising 'Person' and 'Account' nodes,
// and 'PersonOwnAccount' and 'AccountTransferAccount' edges.
personColumns := []string{"id", "name", "birthday", "country", "city"}
accountColumns := []string{"id", "create_time", "is_blocked", "nick_name"}
ownColumns := []string{"id", "account_id", "create_time"}
transferColumns := []string{"id", "to_id", "amount", "create_time", "order_number"}
m := []*spanner.Mutation{
spanner.Insert("Account", accountColumns,
[]interface{}{7, parseTime("2020-01-10T06:22:20.12Z"), false, "Vacation Fund"}),
spanner.Insert("Account", accountColumns,
[]interface{}{16, parseTime("2020-01-27T17:55:09.12Z"), true, "Vacation Fund"}),
spanner.Insert("Account", accountColumns,
[]interface{}{20, parseTime("2020-02-18T05:44:20.12Z"), false, "Rainy Day Fund"}),
spanner.Insert("Person", personColumns,
[]interface{}{1, "Alex", parseTime("1991-12-21T00:00:00.12Z"), "Australia", " Adelaide"}),
spanner.Insert("Person", personColumns,
[]interface{}{2, "Dana", parseTime("1980-10-31T00:00:00.12Z"), "Czech_Republic", "Moravia"}),
spanner.Insert("Person", personColumns,
[]interface{}{3, "Lee", parseTime("1986-12-07T00:00:00.12Z"), "India", "Kollam"}),
spanner.Insert("AccountTransferAccount", transferColumns,
[]interface{}{7, 16, 300.0, parseTime("2020-08-29T15:28:58.12Z"), "304330008004315"}),
spanner.Insert("AccountTransferAccount", transferColumns,
[]interface{}{7, 16, 100.0, parseTime("2020-10-04T16:55:05.12Z"), "304120005529714"}),
spanner.Insert("AccountTransferAccount", transferColumns,
[]interface{}{16, 20, 300.0, parseTime("2020-09-25T02:36:14.12Z"), "103650009791820"}),
spanner.Insert("AccountTransferAccount", transferColumns,
[]interface{}{20, 7, 500.0, parseTime("2020-10-04T16:55:05.12Z"), "304120005529714"}),
spanner.Insert("AccountTransferAccount", transferColumns,
[]interface{}{20, 16, 200.0, parseTime("2020-10-17T03:59:40.12Z"), "302290001255747"}),
spanner.Insert("PersonOwnAccount", ownColumns,
[]interface{}{1, 7, parseTime("2020-01-10T06:22:20.12Z")}),
spanner.Insert("PersonOwnAccount", ownColumns,
[]interface{}{2, 20, parseTime("2020-01-27T17:55:09.12Z")}),
spanner.Insert("PersonOwnAccount", ownColumns,
[]interface{}{3, 16, parseTime("2020-02-18T05:44:20.12Z")}),
}
_, err = client.Apply(ctx, m)
return err
}