My guess ist hat random() is being called once for each expression containing Y. Using constant values from a regular table works as expected. It is exactly the bytecode output by EXPLAIN <query> that could help to determine what happens, but unfortunately you did not post it.
asql> insert into t values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); asql> select y, y<=5, y between 0 and 5, y<6 from t; y y<=5 y between 0 and 5 y<6 ---------- ---- ----------------- --- 0 1 1 1 1 1 1 1 2 1 1 1 3 1 1 1 4 1 1 1 5 1 1 1 6 0 0 0 7 0 0 0 8 0 0 0 9 0 0 0 -----Ursprüngliche Nachricht----- Von: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] Im Auftrag von Keith Maxwell Gesendet: Dienstag, 11. April 2017 10:30 An: SQLite mailing list <sqlite-users@mailinglists.sqlite.org> Betreff: [sqlite] Unexpected results from <, <= and BETWEEN with a CTE in 3.18.0 sqlite-users, Can anyone please explain the results of the query below? I have tried create a very simple test case. In brief returning 9 rows each starting with an integer between zero and nine. Then check if it less than or equal to five, between zero and five and then less than six. I expect all of these comparisons to have the same result. I can't understand the results, and '.explain' isn't any help. SQLite version 3.18.0 2017-03-28 18:48:43 Enter ".help" for usage hints. Connected to a transient in-memory database. Use ".open FILENAME" to reopen on a persistent database. sqlite> sqlite> WITH ...> t1(X) AS ( ...> SELECT 1 ...> UNION ALL ...> SELECT X+1 FROM t1 ...> LIMIT 9 ...> ) ...> ,t2(Y) AS ( ...> SELECT abs(random() % 10) FROM t1 ...> ) ...> SELECT Y, Y <= 5, Y BETWEEN 0 AND 5, Y < 6 FROM t2; 7|1|1|0 3|1|0|0 2|1|1|1 2|0|0|1 0|1|1|1 3|1|1|0 5|1|1|0 6|1|1|0 0|1|1|1 sqlite> Thanks in advance for your assistance. Kind Regards Keith Maxwell _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ___________________________________________ Gunter Hick Software Engineer Scientific Games International GmbH FN 157284 a, HG Wien Klitschgasse 2-4, A-1130 Vienna, Austria Tel: +43 1 80100 0 E-Mail: h...@scigames.at This communication (including any attachments) is intended for the use of the intended recipient(s) only and may contain information that is confidential, privileged or legally protected. Any unauthorized use or dissemination of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by return e-mail message and delete all copies of the original communication. Thank you for your cooperation. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
