Revise message when appending partition with schema mismatch

atris · Jun 5, 2018 · 8c7b3a6 · 8c7b3a6
1 parent 6b1d2a9
commit 8c7b3a6
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/presto-hive/src/main/java/com/facebook/presto/hive/HiveWriterFactory.java b/presto-hive/src/main/java/com/facebook/presto/hive/HiveWriterFactory.java
@@ -375,7 +375,9 @@ public HiveWriter createWriter(Page partitionColumns, int position, OptionalInt
                     HiveType partitionType = existingPartitionColumns.get(i).getType();
                     if (!tableType.equals(partitionType)) {
                         throw new PrestoException(HIVE_PARTITION_SCHEMA_MISMATCH, format("" +
-                                        "There is a mismatch between the table and partition schemas. " +
+                                        "You are trying to write into an existing partition in a table. " +
+                                        "The table schema has changed since the creation of the partition. " +
+                                        "Inserting rows into such partition is not supported. " +
                                         "The column '%s' in table '%s' is declared as type '%s', " +
                                         "but partition '%s' declared column '%s' as type '%s'.",
                                 tableColumns.get(i).getName(),