Add a limit to the column definition on the database, such as VARCHAR(256), or wrap the table in a view which does the same. Use the "Default VARCHAR size (bytes)" field on the Advanced tab when connecting to Snowflake in Tableau Desktop. This was renamed from "Max VARCHAR size" in...
If you know the Snowflake data types of the columns in the returned table, specify the column names and types in the RETURNS TABLE(). CREATE OR REPLACE PROCEDURE get_top_sales() RETURNS TABLE (sales_date DATE, quantity NUMBER) ... Otherwise (for example, if you are determining the colum...
保存其所访问数据的file header + column data，cache在worker node内部，会被多个worker process共享，通...
All other unsupported data types are converted to VARCHAR.Partitions and splits Partitions are used to determine how to generate splits for the connector. Athena constructs a synthetic column of type varchar that represents the partitioning scheme for the table to help the connector generate splits...
getSourceType() Specifies how retrieved data is specified. String getStagingTable() The name of a staging table used when performing merge or upsert append actions. String getTable() Specifies a Snowflake table for your node to use. List<Option> getTableSchema() Manually defines the targe...
GetString(0)); } conn.Close(); } Note that for a TIME column, the reader returns a System.DateTime value. If you need a System.TimeSpan column, call the getTimeSpan method in SnowflakeDbDataReader. This method was introduced in the v2.0.4 release. Note that because this method ...
Which of the below columns are usually a good choice for clustering keys?. UUID column from a Customer in a 10TB table. Gender male/female in a 20TB table. Timestamp in a 10TB table. Store_id in a 2TB table. What types of tables are available in SnowFlake?. Permanent. Temporary. Tr...
Dive into Snowflake's security features, including role-based access control (RBAC), network policies, and row/column-level security. Master the concepts of time travel and zero-copy cloning, which enable point-in-time data recovery and efficient development environments. ...
在cluster中,获取numRanges和addNoise配置,然后再调用getClusteringExpression来获取z-value列。 object ZOrderClustering extends SpaceFillingCurveClustering { override protected[skipping] def getClusteringExpression( cols: Seq[Column], numRanges: Int): Column = { assert(cols.size >= 1, "Cannot do Z-Order...
Analysis How to Use Coalesce How to Get First Row Per Group How to Avoid Gaps in Data How to Do Type Casting How to Write a Common Table Expression How to Import a CSV How to Compare Two Values When One is Null How to Write a Case Statement How to Query a JSON Column How to Have...