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smpa01
Super User
Super User

Delta Table Column name length

The doc mentions following.

 

smpa01_0-1722912703510.png

But I have been able to create delta tables with columns that are 63 characters in length. Some examples below

smpa01_1-1722912917323.png

smpa01_2-1722913024946.png

Can someone form MS please confirm. Is there really any restricition on the length of the column, if yes, whay am I able to create these columns in the delta table with these names?

 

smpa01_4-1722913143823.png

Thank you in advance.

 

 

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Anonymous
Not applicable

Hi @smpa01 

 

Based on my testing, the maximum length of a column name is actually 128 characters. If the length of the column name is greater than 128 characters, the following error message is returned when loading to a delta table:

vjingzhanmsft_0-1722929351813.png

 

Best Regards,
Jing
If this post helps, please Accept it as Solution to help other members find it. Appreciate your Kudos!

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1 REPLY 1
Anonymous
Not applicable

Hi @smpa01 

 

Based on my testing, the maximum length of a column name is actually 128 characters. If the length of the column name is greater than 128 characters, the following error message is returned when loading to a delta table:

vjingzhanmsft_0-1722929351813.png

 

Best Regards,
Jing
If this post helps, please Accept it as Solution to help other members find it. Appreciate your Kudos!

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