If you ever want to create or rebuild an oracle spatial index in another schema, you need to make sure that the target user has CREATE TABLE and CREATE SEQUENCE granted.
where privilege in ('CREATE TABLE', 'CREATE SEQUENCE' )
and grantee = 'TARGET_SCHEMA'
and if they don't have it
grant CREATE TABLE to target_schema;
grant CREATE SEQUENCE to target_schema;
otherwise you will get these errors, hope this helps someone :)
ORA-29855: error occurred in the execution of ODCIINDEXCREATE routine
ORA-13249: internal error in Spatial index: [mdidxrbd]
ORA-13249: Error in Spatial index: index build failed
ORA-13249: Error in R-tree: [mdrcrtscrt]
ORA-13231: failed to create index table [MDRT_11CBE$] during R-tree creation
ORA-13249: Stmt-Execute Failure: CREATE TABLE -----snip-----
ORA-29400: data cartridge error
ORA-01031: insufficient privileges ORA-06512: at ""MDSYS.SDO_INDEX_METHOD_10I"", line 10 "