如何在 spark 2.4.1 中将 jdbc/partitionColumn 类型设置为 Date

Question

我正在尝试使用 spark-sql-2.4.1 版本从 oracle 检索数据。我尝试将 JdbcOptions 设置为如下：

    .option("lowerBound", "31-MAR-02");
    .option("upperBound", "01-MAY-19");
    .option("partitionColumn", "data_date");
    .option("numPartitions", 240);

但给出错误：

    java.lang.IllegalArgumentException: Timestamp format must be yyyy-mm-dd hh:mm:ss[.fffffffff]
        at java.sql.Timestamp.valueOf(Timestamp.java:204)
        at org.apache.spark.sql.execution.datasources.jdbc.JDBCRelation$.toInternalBoundValue(JDBCRelation.scala:179)

然后尝试如下

    .option("lowerBound", "2002-03-31"); //changed the date format
    .option("upperBound", "2019-05-02");
    .option("partitionColumn", "data_date"); 
    .option("numPartitions", 240);

仍然没有运气。那么将日期作为“下限/上限”传递的正确方法是什么？有没有办法指定/设置选项参数数据类型？

Part-2 正确检查选项。它们在执行查询之前被覆盖。所以更正了。...现在该错误已解决。

但对于以下选项：

.option("lowerBound", "2002-03-31 00:00:00"); 
.option("upperBound", "2019-05-01 23:59:59");
.option("timestampFormat", "yyyy-mm-dd hh:mm:ss");

请求参数 ：

query ->  ( SELECT * FROM MODEL_VALS ) T

它引发了另一个错误：

java.sql.SQLException: ORA-12801: error signaled in parallel query server P022, instance nj0005

ORA-01861: literal does not match format string

Answer 1

如果您使用的是 Oracle，请参阅https://github.com/apache/spark/blob/master/external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/OracleIntegrationSuite.scala #L441

val df1 = spark.read.format("jdbc")
      .option("url", jdbcUrl)
      .option("dbtable", "datetimePartitionTest")
      .option("partitionColumn", "d")
      .option("lowerBound", "2018-07-06")
      .option("upperBound", "2018-07-20")
      .option("numPartitions", 3)
      // oracle.jdbc.mapDateToTimestamp defaults to true. If this flag is not disabled, column d
      // (Oracle DATE) will be resolved as Catalyst Timestamp, which will fail bound evaluation of
      // the partition column. E.g. 2018-07-06 cannot be evaluated as Timestamp, and the error
      // message says: Timestamp format must be yyyy-mm-dd hh:mm:ss[.fffffffff].
      .option("oracle.jdbc.mapDateToTimestamp", "false")
      .option("sessionInitStatement", "ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD'")
      .load()