Major Description
I have a MSSQL table that has a timestamp column and am reading it using DataFrameReader.jdbc. Adding a where clause which compares a timestamp range causes a SQLServerException.
The problem is in https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala#L264 (compileValue) which should surround timestamps/dates with quotes (only does it for strings).
Sample pseudo-code:
val beg = new java.sql.Timestamp(...)
val end = new java.sql.Timestamp(...)
val filtered = jdbcdf.where($"TIMESTAMP_COLUMN" >= beg && $"TIMESTAMP_COLUMN" < end)
Generated SQL query: "TIMESTAMP_COLUMN >= 2015-01-01 00:00:00.0"
Query should use quotes around timestamp: "TIMESTAMP_COLUMN >= '2015-01-01 00:00:00.0'"
Fallback is to filter client-side which is extremely inefficient as the whole table needs to be downloaded to each Spark executor.
Thanks
