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Diffstat (limited to 'docs/sql-programming-guide.md')
| -rw-r--r-- | docs/sql-programming-guide.md | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md index ccd2690432..6e02d6564b 100644 --- a/docs/sql-programming-guide.md +++ b/docs/sql-programming-guide.md @@ -982,7 +982,8 @@ when a table is dropped. [Parquet](http://parquet.io) is a columnar format that is supported by many other data processing systems. Spark SQL provides support for both reading and writing Parquet files that automatically preserves the schema -of the original data. +of the original data. When writing Parquet files, all columns are automatically converted to be nullable for +compatibility reasons. ### Loading Data Programmatically |