-- Alter the a table's table properties.>ALTERTABLETSETTBLPROPERTIES(this.is.my.key =14,'this.is.my.key2'=false); >SHOWTBLPROPERTIES T; key value--- ---... this.is.my.key 14 this.is.my.key2 false ... UNSET TBLPROPERTIES 从表...
Table 屬性 delta.targetFileSize類型:以位元組為單位或更高單位的大小。目標檔案大小。 例如, 104857600 (位元元組)或 100mb。預設值:無 對於現有的數據表,您可以使用 SQL 命令 ALTER TABLE SET TBL PROPERTIES 來設定和取消設定屬性。 您也可以在使用 Spark 工作階段設定建立新資料表時自動設定這些屬性。 如需詳...
SET TBLPROPERTIES Sets one or more table properties in an existing table or view. Syntax SETTBLPROPERTIES({property_key[=]property_val}[,...])property_key{identifier[...]|string_literal} Parameters property_key The property key. The key can consist of one or moreidentifiersseparated by a dot...
可以使用 VACUUM 从物理存储中移除已删除的文件,包括包含已删除列并已被 REORG TABLE 重写的旧文件。COPY INTO 改进:现可创建空占位符 Delta 表,以便在 COPY INTO 命令期间推断架构:SQL 复制 CREATE TABLE IF NOT EXISTS my_table [COMMENT <table-description>] [TBLPROPERTIES (<table-properties>)]; COPY ...
-- Perform shallow cloneCREATEORREPLACETABLEmy_test SHALLOWCLONEmy_prod_table;UPDATEmy_testWHEREuser_idisnullSETinvalid=true;-- Run a bunch of validations. Once happy:-- This should leverage the update information in the clone to prune to only-- changed files in the clone if possibleMERGEINTO...
Access mode should be set. crawl_cluster_policies : This tasks retrieves cluster policies and persists the policies in the policies table. Incompatibility with UC is assessed: Databricks runtime should be version 11.3 or above assess_azure_service_principals: This tasks retrieves Azure service ...
diststyleNoEVENThe RedshiftDistribution Styleto be used when creating a table. Can be one ofEVEN,KEYorALL(see Redshift docs). When usingKEY, you must also set a distribution key with thedistkeyoption. distkeyNo, unless usingDISTSTYLE KEYNo defaultThe name of a column in the table to use...
With Import mode, we are essentially ingesting a whole table from our Lake House into Power BI in-memory dataset. This means Power BI is producing a query that usually returns a large number of records (ultimately all present in the table), including generally a...
Table数据集数据存储在HDFS中。同一Spark集群内的节点可以作为HDFS的数据节点。 CarbonData特性 SQL功能:CarbonData与Spark SQL完全兼容,支持所有可以直接在Spark SQL上运行的SQL查询操作。 简单的Table数据集定义:CarbonData支持易于使用的DDL(数据定义语言)语句来定义和创建数据集。CarbonData DDL十分灵活、易于使用,并且足够...
our new maintenance location is the job editor. The last design pattern was to store all the metadata in a DELTA table. I prefer this pattern since the notebook and job editor have a single mnemonic value. All the maintenance is within a table. As a data engineer, creating and maintaining...