Create VECTOR columns only in ASSM-managed tablespaces in Oracle 23ai. When vector DDL fails, check the tablespace type first. Also confirm Oracle Text and the CTXAPP components exist, since vector text workflows depend on them.

Context: Web commit docs (Hindsight Oracle setup guide): documents the gotcha that Oracle 23ai VECTOR columns require an ASSM-managed tablespace. Agents provisioning tables with vector columns in a non-ASSM tablespace will hit errors; the fix is creating the table in an ASSM tablespace and ensuring Oracle Text/CTXAPP prerequisites are in place.