1
在JDBC To Other Databases我發現dbtable
參數如下解釋:如何使用SQL查詢在dbtable中定義表?
The JDBC table that should be read. Note that anything that is valid in a FROM clause of a SQL query can be used. For example, instead of a full table you could also use a subquery in parentheses.
當我使用的代碼:
CREATE TEMPORARY TABLE jdbcTable
USING org.apache.spark.sql.jdbc
OPTIONS (
url "jdbc:postgresql:dbserver",
dbtable "mytable"
)
一切都很正常,但以下幾點:
dbtable "SELECT * FROM mytable"
導致錯誤:
出了什麼問題?