Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/10470#discussion_r48586148
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
---
@@ -295,25 +318,17 @@ private[sql] class JDBCRDD(
/**
* `filters`, but as a WHERE clause suitable for injection into a SQL
query.
*/
- private val filterWhereClause: String = {
- val filterStrings = filters.map(JDBCRDD.compileFilter).filter(_ !=
null)
- if (filterStrings.size > 0) {
- val sb = new StringBuilder("WHERE ")
- filterStrings.foreach(x => sb.append(x).append(" AND "))
- sb.substring(0, sb.length - 5)
- } else ""
- }
+ private val filterWhereClause: Seq[Option[String]] =
filters.map(JDBCRDD.compileFilter)
--- End diff --
yes. I added flatten to it and return Array[String] then.
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