Hi, I have been looking around optimizer's code and found a comment:
/* * process_duplicate_ors * Given a list of exprs which are ORed together, try to apply * the inverse OR distributive law. Anybody enlighten what "inverse OR distributive law" is? -- SRA OSS, Inc. Japan Tatsuo Ishii ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org