saikocat commented on a change in pull request #31252:
URL: https://github.com/apache/spark/pull/31252#discussion_r560796346
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
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@@ -306,13 +306,14 @@ object JdbcUtils extends Logging {
}
val metadata = new MetadataBuilder()
// SPARK-33888
- // - include scale in metadata for only DECIMAL & NUMERIC
+ // - include scale in metadata for only DECIMAL & NUMERIC as well as
ARRAY (for Postgres)
Review comment:
But the only way `fieldScale` can make it into the dialect is by the
field metadata. So it is a very chicken and egg problem.
Might have to change the interface somehow to let the ResultSetMetadata to
be passed or init-ed to the dialect.
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