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Is there a max length for the payload of an ASCII_STRING / RMTES_STRING field?
All I can see documentation-wise is the table "5.5.2.4 FIELD TYPE Keywords" in the "RDM Usage Guide" but I'm reading that as how to convert MarketFeed types to RWF?
I'm inferring (/hoping) from reading the SDK code that string length is only limited by the UInt32 length member of RwfBuffer and EmaString?
Also, is there any max cachable length for these types in the ADH?
I tested with ADS and found that its cache can contain a long string (400 bytes). However, it is better to contact the RTDS support team directly via MyRefinitiv to confirm it.
Yes, you can specify custom fields for your own data. The field IDs of custom fields must be negative values. Please check the Publish Custom Data via Refinitiv Real-Time Distribution System by EMA article regarding the FID Number Policy. However, you need to make sure that the providers, RTDS, and consumers load and use this dictionary.
Otherwise, you can use existing fields. For example:
SEG_TEXT "TEXT" 258 NULL ALPHANUMERIC 255 RMTES_STRING 255 SEG_TEXT_2 "SEG TEXT 2" 1059 NULL ALPHANUMERIC 255 RMTES_STRING 255 SEG_TEXT_3 "SEG TEXT 3" 1060 NULL ALPHANUMERIC 255 RMTES_STRING 255 INSTFUNAM1 "INSTR FULL NAME 1" 15433 NULL ALPHANUMERIC 350 RMTES_STRING 350 INSTFUNAM2 "INSTR FULL NAME 2" 15434 NULL ALPHANUMERIC 350 RMTES_STRING 350 KEYWORD "KEYWORD" 30019 NULL ALPHANUMERIC 510 RMTES_STRING 510 ADMIN_MSG "ADMIN MSG" 32423 NULL ALPHANUMERIC 500 RMTES_STRING 500
Thank you for reaching out to us.
Technically, the content of each field entry has a maximum encoded length of 65,535 bytes.
However, the application should follow the length defined in the data dictionary (RDMFieldDictionary).
For example:
! !ACRONYM DDE ACRONYM FID RIPPLES TO FIELD TYPE LENGTH RWF TYPE RWF LEN !------- ----------- --- ---------- ---------- ------ -------- ------- DSPLY_NAME "DISPLAY NAME" 3 NULL ALPHANUMERIC 16 RMTES_STRING 16
The RWF LEN (RWF maximum field length (for caching)) of the DSPLY_NAME field is 16 bytes so the length of content in the DSPLY_NAME field shouldn't exceed 16 bytes.
Thanks @Jirapongse.
I should have specified that I'm using a custom dictionary. I'm wanting to populate one FID with a fairly long string (some base64 encoded data). If I know that this string will never exceed, say, 400 bytes, Am I safe to define the field in the dictionary like this (and have the full value cached in the ADH):
!ACRONYM DDE ACRONYM FID RIPPLES TO FIELD TYPE LENGTH RWF TYPE RWF LEN !------- ----------- --- ---------- ---------- ------ -------- ------- SOME_DATA "" 42 NULL NONE 0 RMTES_STRING 400
