# 13.67. Release 0.185

## General Changes

• Fix incorrect column names in QueryCompletedEvent.
• Fix excessive CPU usage in coordinator for queries that have large string literals containing non-ASCII characters.
• Fix potential infinite loop during query optimization when constant expressions fail during evaluation.
• Fix incorrect ordering when the same field appears multiple times with different ordering specifications in a window function ORDER BY clause. For example: OVER (ORDER BY x ASC, x DESC).
• Do not allow dropping or renaming hidden columns.
• When preparing to drop a column, ignore hidden columns when checking if the table only has one column.
• Improve performance of joins where the condition is a range over a function. For example: a JOIN b ON b.x < f(a.x) AND b.x > g(a.x)
• Improve performance of certain window functions (e.g., LAG) with similar specifications.
• Extend substr() function to work on VARBINARY in addition to CHAR and VARCHAR.
• Add cast from JSON to ROW.
• Allow usage of TRY within lambda expressions.

## Hive Changes

• Improve ORC reader efficiency by only reading small ORC streams when accessed in the query.
• Improve RCFile IO efficiency by increasing the buffer size from 1 to 8 MB.
• Fix native memory leak for optimized RCFile writer.
• Fix potential native memory leak for optimized ORC writer.