可選的子句,用於指示 Databricks SQL 當某些屬性索引鍵不存在時,不會引發錯誤。 property_key 要移除的屬性鍵。 鍵可以由一個或多個以點分隔的標識碼或字串常量組成。 屬性索引鍵區分大小寫。 如果property_key不存在,除非IF EXISTS已指定,否則會引發錯誤。 範例 SQL複製 -- Remove a table...
exists(query) 引數 expr:ARRAY 表達式。 func:Lambda 函式。 query:任何 查詢。 傳回 布爾值。 Lambda 函式必須產生布爾值,並在一個參數上運作,該參數代表陣列中的元素。 exists(query)只能在 WHERE 子句和少數其他特定案例中使用。 範例 SQL 複製 > SELECT exists(array(1, 2, 3), x -> x % 2 ...
IF EXISTS 如果指定,當數據表不存在時,不會擲回任何 TABLE_OR_VIEW_NOT_FOUND 錯誤。 table_name 要刪除的資料表名稱。 名稱不得包含 時態規格或選項規格。如果找不到數據表,Azure Databricks 就會引發 TABLE_OR_VIEW_NOT_FOUND 錯誤。範例SQL 複製
CONNECTION_ALREADY_EXISTS, CONNECTION_NAME_CANNOT_BE_EMPTY, CONNECTION_NOT_FOUND, CONNECTION_OPTION_NOT_SUPPORTED, CONNECTION_TYPE_NOT_SUPPORTED, COPY_UNLOAD_FORMAT_TYPE_NOT_SUPPORTED, CREATE_FOREIGN_SCHEMA_NOT_IMPLEMENTED_YET, CREATE_FOREIGN_TABLE_NOT_IMPLEMENTED_YET, DELTA_ADDING_COLUMN_WITH_INTERNAL...
Writing data using SQL: --Create a new table, throwing an error if a table with the same name already exists:CREATETABLEmy_tableUSINGcom.databricks.spark.redshiftOPTIONS ( dbtable'my_table', tempdir's3n://path/for/temp/data'url'jdbc:redshift://redshifthost:5439/database?user=username&pas...
_joiners: config of table joining for this feature _kind: Is the featuremultipliable(default) orbase. For example, a feature is multipliable if it should be allowed to be combined with other concepts through the use of a multiplier. Some features such asdaysSinceFirstTransactionare base featu...
If this field is left empty, these schemas should be created in the default catalog. Note that data in other catalogs can still be accessed for model creation by specifying the full name (catalog.schema.table) in the Hightouch SQL interface. Schema: The initial schema to use for the ...
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{config['ft_user_item_name']}" # --- create and write the feature store if spark.catalog.tableExists(table_name): #to update the table fe.write_table( name=table_name, df=df_ratings_transformed, ) else: fe.create_table( name=table_name, primary_keys=config['ft_user_item_pk'], ...
Cmd 2 will search all accessible databases for a table or view named countries_af: if this entity exists, Cmd 2 will succeed. Cmd 1 will succeed and Cmd 2 will fail. countries_af will be a Python variable representing a PySpark DataFrame. Both commands will fail. No new variables, ...