Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/1612#discussion_r15506043
--- Diff: core/src/main/scala/org/apache/spark/rdd/JdbcRDD.scala ---
@@ -81,8 +105,10 @@ class JdbcRDD[T: ClassTag](
logInfo("statement fetch size set to: " + stmt.getFetchSize + " to
force MySQL streaming ")
}
- stmt.setLong(1, part.lower)
- stmt.setLong(2, part.upper)
+ val parameterCount = stmt.getParameterMetaData.getParameterCount
+ if (parameterCount > 0) stmt.setLong(1, part.lower)
+ if (parameterCount > 1) stmt.setLong(2, part.upper)
+
--- End diff --
This is not what your mean here. It is something like `SELECT * FROM tbl
limit ?, ?`. But there is probably a bug in original implementation, as I
remember the second parameter of `LIMIT` clause in MySQL is the `row_count`,
not the `upper`. see: http://dev.mysql.com/doc/refman/5.0/en/select.html
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