Solution : https://service.sap.com/sap/support/notes/558197 (SAP Service marketplace login required)
Key words :
sql> connect sapr3/<password>sql> drop synonym user_ind_columns, goto st04 -> detail analysis menu -> oracle sessions 4, terms user_ind_columnsdba_ind_columns100% cpuparconv_upgshadow_import_upg2job_rsindchkxpras_upgno upgrade activity reason, goto transaction sm50, sql sql>select, directory oracle -> oracle, oracle data dictionary, 3rdparty maintenance softwarecenter, oracle database version, oracle shadow process
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