spark刪除jdbc的方法是什么

小億
99
2023-12-20 22:38:23
欄目: 編程語言

在Spark中,可以使用DataFrameWriterjdbc方法來刪除JDBC中的數(shù)據(jù)。具體的方法如下所示:

import org.apache.spark.sql._

val spark = SparkSession.builder()
  .appName("Delete JDBC data")
  .config("spark.master", "local")
  .getOrCreate()

val jdbcUrl = "jdbc:mysql://localhost:3306/mydatabase"
val jdbcUsername = "username"
val jdbcPassword = "password"

val table = "my_table"
val condition = "id > 100"

val deleteQuery = s"DELETE FROM $table WHERE $condition"

val connectionProperties = new java.util.Properties()
connectionProperties.put("user", jdbcUsername)
connectionProperties.put("password", jdbcPassword)

val df = spark.read.jdbc(jdbcUrl, table, connectionProperties)

df.write.mode(SaveMode.Append).jdbc(jdbcUrl, table, connectionProperties)

上述代碼中,deleteQuery是要執(zhí)行的DELETE語句,connectionProperties包含了JDBC連接所需的用戶和密碼。然后,可以使用DataFrameWriterjdbc方法將DELETE語句傳遞給JDBC以刪除數(shù)據(jù)。

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