[Python] Add the IF NOT EXISTS clause or REFRESH clause in DataBricks python

Cannot create table or view abc because it already exists. Choose a different name, drop or replace the existing object, add the IF NOT EXISTS clause to tolerate pre-existing objects, or add the OR REFRESH clause to refresh the existing streaming table. SQLSTATE: 42P07
​

sdf_ext = spark.sql (
sql_code_ext
)
sdf_ext.write.saveAsTable("abc")

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