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How to alter a column data type from numeric(3,2) to numeric(5,4) in Vertica

In Vertica, you can alter the precision, but you cannot alter the scale of the numeric:
Here are two options:
1- Create a new table with new column data type, load it with the data from exiting table, drop the old one and rename the new one.
2- Create a new column in the table, load the column with the data, drop the old column and rename the new one.


  • hsaxena20hsaxena20 Community Edition User

    You cannot alter a column data type if it present in projections segmentation or order by clause. First create a super projections without having that column in segmentation and order by. Second, refresh the table. Third, Delete the earlier superprojection.
    Now you can able to change the data type.

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