在python中执行snowflake SQL语句时snowflake-python错误

Question

I get this error why i try to execute a dynamic sql just built while executing the program

'SnowflakeCursor' object has no attribute 'strip'

This is the dynamic SQL

Alter_add_dyn_sql="SELECT 'ALTER TABLE "+schema+"."+object_name+" ADD(COL_Y VARCHAR2(100));' FROM DUAL;"

Here is the call to execute the cursor i have opened

This is the dynamic SQL

 cs_dev_cdw=dev_cdw_conn.cursor()
 print(Alter_add_dyn_sql)                         
 Alt_add_sql=cs_dev_cdw.execute(Alter_add_dyn_sql)
 print(Alt_add_sql)

   output: Alter_add_dyn_sql="SELECT 'ALTER TABLE "+schema+"."+object_name+" ADD(COL_Y 
    VARCHAR2(100));' FROM DUAL;"
 Alt_add_sql=cs_dev_cdw.execute(Alter_add_dyn_sql)
 execute error:
 'SnowflakeCursor' object has no attribute 'strip'

dev_cdw_conn definition

dev_cdw_conn = sf.connect (dev_cdw_database=config.dev_cdw_database,dev_warehouse=config.dev_warehouse,user=config.username,password=config.password,account=config.account,dev_role=config.dev_cdw_role)

Answer 1

I wasn't able to reproduce your error, but I do see one problem in your code: you don't have to construct the SQL statement by selecting from dual. You can just pass in the SQL statement as a string:

Alter_add_dyn_sql='ALTER TABLE '+schema+'.'+object_name+' ADD(COL_Y VARCHAR2(100));'