pyspark.sql.streaming.DataStreamReader.parquet#

DataStreamReader.parquet(path, mergeSchema=None, pathGlobFilter=None, recursiveFileLookup=None, datetimeRebaseMode=None, int96RebaseMode=None)[source]#

Loads a Parquet file stream, returning the result as a DataFrame.

Added in version 2.0.0.

Changed in version 3.5.0: Supports Spark Connect.

Parameters:

pathstr: the path in any Hadoop supported file system

Other Parameters:

Extra options: For the extra options, refer to Data Source Option. in the version you use.

Examples

Load a data stream from a temporary Parquet file.

>>> import tempfile
>>> import time
>>> with tempfile.TemporaryDirectory(prefix="parquet") as d:
...     # Write a temporary Parquet file to read it.
...     spark.range(10).write.mode("overwrite").format("parquet").save(d)
...
...     # Start a streaming query to read the Parquet file.
...     q = spark.readStream.schema(
...         "id LONG").parquet(d).writeStream.format("console").start()
...     time.sleep(3)
...     q.stop()