適用於:Databricks SQL Databricks Runtime將現有的 Parquet 資料表就地轉換為 Delta 資料表。 此命令會列出目錄中的所有檔案、建立 Delta Lake 事務歷史記錄來追蹤這些檔案,並藉由讀取所有 Parquet 檔案的頁尾自動推斷數據架構。 轉換程式會收集統計數據,以改善已轉換之 Delta 數據表的查詢效能。 如果您提供數據表名稱...
Learn how to use the CONVERT TO DELTA syntax of Delta Lake SQL language in Databricks SQL and Databricks Runtime.
In Databricks Runtime 13.3 LTS and above, you can work with truncated columns of typesstring,long, orint. Azure Databricks does not support working with truncated columns of typedecimal. You can convert a directory of Parquet data files to a Delta Lake table as long as you have write access...
In Databricks Runtime 13.3 LTS and above, you can work with truncated columns of typesstring,long, orint. Azure Databricks does not support working with truncated columns of typedecimal. You can convert a directory of Parquet data files to a Delta Lake table as long as you have write access...
Add the JSON string as a collection type and pass it as an input tospark.createDataset. This converts it to a DataFrame. The JSON reader infers the schema automatically from the JSON string. This sample code uses a list collection type, which is represented asjson :: Nil. You can also...
I have been a part of many hotly debated sessions where IT will argue that this is too costly to extract with BW or that "long texts don't belong in the data warehouse". We can argue until we are blue in the face, but at the end of the day, there i...
Analytic Models 1 Analytical Dataset 1 Analytical Model 1 analytics 5 Analyze Workload Data 1 and Governance 1 Android 1 annotations 1 anthropic 1 Apache Iceberg 1 Apache Parquet 1 API 7 API and Integration 5 API Call 2 API Integration 6 api optimization 1 ...
skip_profile("databricks_sql_endpoint", "spark_session") class TestInsertOverwriteOnSchemaChange(IncrementalOnSchemaChangeIgnoreFail): @pytest.fixture(scope="class") def project_config_update(self): return { "models": { "+file_format": "parquet", "+partition_by": "id", "+incremental_...
Databricks Runtime Converts an existing Parquet table to a Delta table in-place. This command lists all the files in the directory, creates a Delta Lake transaction log that tracks these files, and automatically infers the data schema by reading the footers of all Parquet files. The conversion...
In Databricks Runtime 13.3 LTS and above, you can work with truncated columns of types string, long, or int. Azure Databricks does not support working with truncated columns of type decimal. You can convert a directory of Parquet data files to a Delta Lake table as long as you have write...