'Snowflake - How do I handle a bad Virtual Column after it is INSERTed?
I am surprise that I can insert a Row that results in a Virtual Column going bad. How then do I detect the bad Virtual Columns and handle it (especially in code)?
CREATE TABLE TEST
(
REC_DATE VARCHAR2(500),
REC_TIME VARCHAR2(500),
REC_DATETIME DATETIME AS TO_TIMESTAMP( REC_DATE || ' ' || REC_TIME, 'DD/MM/YYYY HH24:MI:SS' )
);
INSERT INTO TEST ( REC_DATE, REC_TIME ) VALUES ( '02/02/2022', '02:22:22' );
INSERT INTO TEST ( REC_DATE, REC_TIME ) VALUES ( '03/03/2023', '03:33:33' );
And then insert a bad row that results in the bad Virtual Column:
INSERT INTO TEST ( REC_DATE, REC_TIME ) VALUES ( '02/02/2022', '99:22:22' );
SELECT * FROM TEST;
and you should get this error:
"SQL compilation error: error line 1 at position 7 invalid identifier 'TEST'"
I wonder how you would detect and weed out the bad rows, especially if there is a lot of data?
Sources
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