#bq_sushi tokyo #5の登壇資料です

3. ↑↑We’re Hiring!

8. bq {
select(p.result.*, t.result.*).from(
(Post in dataset) as p
).leftJoin(
(Tag in dataset) as t
).on(p.id, t.postId)
}
.one(Post(_))
.toMany(Tag.opt)
.map(PostWithTags)
.list
.run(executor)

9. bq {
select(p.result.*, t.result.*).from(
(Post in dataset) as p
).leftJoin(
(Tag in dataset) as t
).on(p.id, t.posssssstId) // wrong column name
}

10. bq {
select(p.result.*, t.result.*).from(
(Post in dataset) as p
).leftJoin(
(Tag in dataset) as t
).on(p.id, t.postId)
.where
// Don't know how to bind MyDataType as parameter
.eq(t.name, MyDataType("some tag_name"))
}

11. bq {
select(
// window function
p.result.*, rank.over(orderBy(p.postedAt.desc)).as(sqls"rnk")
).from(
(Post in dataset) as p
)
}
.map { resultSet =>
PostWithRank(Post(resultSet), resultSet.int(sqls"rnk"))
}
.list
.run(executor)

13.
Query Building
(ScalikeJDBC)
Execute
using BigQuery Java
Client Library
(scalikejdbc-bigquery)
Extract Result
(scalikejdbc-bigquery)

23. // JDBC
val statement = conn.prepareStatement(
"select * from user where id = ? and name = ?"
)
// bind parameters
statement.setInt(1, 42)
statement.setString(2, "John")
// BigQuery Java Client Library
val request = QueryRequest.newBuilder(
"select * from user where id = ? and name = ?")
.setPositionalParameters(
Seq(
QueryParameterValue.int64(42),
QueryParameterValue.string("John")
).asJava
)
.build()