builder=(SparkSession.builder .appName("optimize-table-partitions-delta") .master("spark://ZZHPC:7077") .config("spark.sql.extensions","io.delta.sql.DeltaSparkSessionExtension") .config("spark.sql.catalog.spark_catalog","org.apache.spark.sql.delta.catalog.DeltaCatalog")) spark=configure_spark...
delta.autoOptimize.autoCompact delta.dataSkippingNumIndexedCols データ連携後に行うべき処理 Optimnize Z-order Vacuum Analyze table7-3. データエンジニアリング時におけるクラスターの利用指針分散処理でデータエンジニアリングを行う場合には、複数台の汎用的なサーバーにて処理を行われるこ...
Load a Delta Table by Version ID (Time Travel Query) Load a Delta Table by Timestamp (Time Travel Query) Compact a Delta Table Add custom metadata to a Delta table write Read custom Delta table metadata Spark Streaming Connect to Kafka using SASL PLAIN authentication Create a windowed Struct...
In this example, we created a Polars DataFrame using a Python dictionary. The syntax is similar to Pandas, but the operations are optimized for speed. Polars offers lazy evaluation, which means it can optimize the execution of multiple operations at once, reducing computation time. ...
各个SELECT语句之间使用UNION或UNION ALL关键字分隔。 语法格式： SELECT column,... FROM table1 UNION...
Load a Delta Table by Version ID (Time Travel Query) Load a Delta Table by Timestamp (Time Travel Query) Compact a Delta Table Add custom metadata to a Delta table write Read custom Delta table metadata Spark Streaming Connect to Kafka using SASL PLAIN authentication Create a windowed Struct...