Question

我使用数据库Snowflake。架构具有更多15000表。我尝试通过以下查询获取有关当前模式中表计数的信息：

SELECT COUNT(T.table_name) as tnum FROM information_schema.TABLES T WHERE 
 T.table_schema = 'MYSCHEMA' 
 AND T.TABLE_CATALOG = 'MYDB' 
 AND T.table_type = 'BASE TABLE'

并得到以下错误： “信息架构查询返回的数据过多。请使用更多选择性谓词重复查询。”

您知道如何解决这种错误吗？

Answer 1

您可以在“帐户使用情况”架构上运行相同的查询，并且该查询应该有效

SELECT COUNT(T.table_name) as tnum FROM snowflake.account_usage.TABLES T WHERE 
 T.table_schema = 'MYSCHEMA' 
 AND T.TABLE_CATALOG = 'MYDB' 
 AND T.table_type = 'BASE TABLE'

Answer 2

SELECT COUNT(*) as tnum FROM information_schema.TABLES T WHERE  
T.table_schema = 'MYSCHEMA'   AND T.TABLE_CATALOG = 'MYDB'   AND
T.table_type = 'BASE TABLE'

使用此查询代码，然后尝试一次。

Answer 3

   // count of all the tables in the given database and schema. (Excludes dropped tables)
   SELECT count(T.table_name)
   FROM   snowflake.account_usage.tables T
   WHERE  table_catalog = 'DB_NAME'
   AND    table_schema = 'SCHEMA_NAME'
   AND    table_type = 'BASE TABLE'
   AND    deleted IS NULL // This filters the dropped table

雪花，选择表计数错误：信息架构查询返回太多数据

3 个答案: