[GitHub] [arrow] liusitan commented on issue #13875: How does arrow parse its ipc format?

[GitBox]

liusitan commented on issue #13875:
URL: https://github.com/apache/arrow/issues/13875#issuecomment-1215419703

   Thanks for the lightning response first! got it, I am looking at the 
schema.fbs now
   <img width="1207" alt="image" 
src="https://user-images.githubusercontent.com/20542539/184681707-97e8fffc-3147-4b4e-84fa-bde7bc01a5c2.png";>
   I guess you are saying that the field in the schema type includes the type 
info, and according to the Field fbs definition, Field contains 
   <img width="1150" alt="image" 
src="https://user-images.githubusercontent.com/20542539/184682176-ec420049-af15-4011-bcd3-031364f42cf8.png";>
   I can use the type underlined above to determine the type of the field node. 
   I notice it comments that   _ This is the type of the decoded value if the 
field is **dictionary encoded**_. what does dictionary encoded mean?  is the 
example below dictionary encoded 
   name | age | balance
   'jack'    | 12.  |  100.23
   'Jennie' | 24   | 2000.34
   
   


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