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"Unsupported" Entries in V$LOGMNR_CONTENTS For SQL_REDO and SQL_UNDO When Mined Objects Contain JSON Column (Doc ID 2945532.1)

Last updated on APRIL 28, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


When using ad-hoc LogMiner (i.e. the DBMS_LOGMNR API) to mine redo for tables with columns that have JSON attributes in an extended varchar2 environment (MAX_STRING_SIZE=EXTENDED), the SQL_REDO and SQL_UNDO columns show 'Unsupported'.

A simple test case that illustrates the issue is:

If max_string_size=STANDARD, this issue does not occur.


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