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25 Commits

Author SHA1 Message Date
drh
6e5020e8da Also prohibit the use of rowid from a subquery. Add the 
SQLITE_ALLOW_ROWID_IN_VIEW compile-time option to restore legacy behavior
in case somebody actually needs it.

FossilOrigin-Name: 14b1d56ef84b0e62b7f9c4e5f7f985ca10e770c8db59f54004ad892c2a2dcbfb
 2021-04-07 15:45:01 +00:00
drh
426f4ab009 Make sure affinity is applied correctly on lower-bound range constraints 
in the min() optimization.  Fix for ticket [a0bac8b3c3d1bb].

FossilOrigin-Name: b819bace9c2a0b0159122b26db96a8f50a6f0eac
 2016-07-26 04:31:14 +00:00
dan
4ac391fc05 Attempt to further generalize the min/max optimization so that, if an appropriate index exists, it can be used by any aggregate query that contains only a single aggregate of the form max(colname) or min(colname) and does not contain a GROUP BY clause. 
FossilOrigin-Name: 7280e14cd8f55896451847b432171e8750a07c81
 2012-12-13 16:37:10 +00:00
drh
21172c4cc0 Add an optimization that attempts to run a subquery as a coroutine rather 
than manifesting it into a temporary table.

FossilOrigin-Name: 7af3acbbd49a2114fcdada9ec907c68ba9b053bd
 2012-10-30 00:29:07 +00:00
drh
0880a74633 Improved testing of the min/max optimization. (CVS 5373) 
FossilOrigin-Name: fa07c360b708324c47c8e9931f1e2b1b24e4faf8
 2008-07-08 18:05:26 +00:00
danielk1977
a9d1ccb9b0 First pass at optimizing max()/min() as described in #2853. Some refinements to come. (CVS 4687) 
FossilOrigin-Name: c449e04f1870b1ff726c95c0bf1c6c6a22ca588a
 2008-01-05 17:39:29 +00:00
drh
923782530b SQLite now always chooses the column names for compound selects using 
the left-most select.  This makes SQLite work like other SQL database,
but it also is a change from historical behavior and may break some
scripts.  Ticket #1721. (CVS 3153)

FossilOrigin-Name: 80cda9f7ce83f2de6cd2fdaf6150bbc35b670fee
 2006-03-26 01:21:22 +00:00
drh
3f219f46fc A SUM() of all NULLs returns NULL. A SUM() of nothing return 0. 
A SUM() of a mixture of NULLs and numbers returns the sum of the
numbers.  Ticket #1413. (CVS 2677)

FossilOrigin-Name: 2e6230edfd651b40481ebad8aa01a22ac92ce80c
 2005-09-08 19:45:57 +00:00
drh
3d1d95e625 The SUM() aggregate function returns an integer result if all inputs are 
integers.  Any single non-integer input causes the result to be a floating
point value. (CVS 2669)

FossilOrigin-Name: 21adf4bd99e732650a1e8e9a1cc954126983a654
 2005-09-08 10:37:01 +00:00
danielk1977
e61b9f4f3c Modify test scripts to work when SQLITE_OMIT_SUBQUERY (but no other OMIT macros) is defined. (CVS 2252) 
FossilOrigin-Name: d4e19efcef68d834c55c7d496cdb3696d63a31a2
 2005-01-21 04:25:47 +00:00
danielk1977
3e8c37e7f8 Modify test scripts to work when SQLITE_OMIT_SUBQUERY (along with other OMIT macros) is defined. (CVS 2251) 
FossilOrigin-Name: bb0254ab14417f0ab40f10f37cb63a60507f070a
 2005-01-21 03:12:14 +00:00
danielk1977
27c774388a Ensure tests pass when SQLITE_OMIT_COMPOUND_SELECT is defined. (CVS 2138) 
FossilOrigin-Name: 007be591b7829f9ff38e4b14ba5a5043796c2ff3
 2004-11-22 13:35:41 +00:00
drh
92febd92ad Tcl interface transfers values directly between SQLite and Tcl_Objs, without 
at translation to strings. (CVS 1898)

FossilOrigin-Name: e97c331362545ce21117776c7b61d3488668f2bf
 2004-08-20 18:34:20 +00:00
drh
1af3fdb4dc An improved fix for the min() problem of ticket #800. (CVS 1804) 
FossilOrigin-Name: b6e8b7a13cd9f90e2f7d963d9ddbe591571f3a27
 2004-07-18 21:33:01 +00:00
drh
9eb516c0eb min() ignores NULL values. Ticket #800. (CVS 1802) 
FossilOrigin-Name: 166234a2b61e1d6a501e48dde1caec0a02bec90b
 2004-07-18 20:52:32 +00:00
danielk1977
3aeab9e438 Apply (1679) to version 3. Ticket #777. (CVS 1680) 
FossilOrigin-Name: 0a26b9158095f0995fce2f0ccdfb383ab26c76a5
 2004-06-24 00:20:04 +00:00
drh
6e17529e97 Fix the min/max optimizer so that it works when the FROM clause is a 
subquery.  Ticket #658. (CVS 1293)

FossilOrigin-Name: 31c94acc72d318b5dec0fef1485621943add45c8
 2004-03-13 14:00:36 +00:00
drh
268380ca9e Min() and max() functions honor the distinction between TEXT and NUMERIC 
data.  Ticket #623.  typeof() is now a user function.  Some tests are
now failing due to ticket #521. (CVS 1272)

FossilOrigin-Name: adbe31adf1ad0ca723203ca3d7dc480324c60d43
 2004-02-25 13:47:31 +00:00
drh
0c37e6309b Make sure min() and max() optimizations work for subqueries. Ticket #587. (CVS 1201) 
FossilOrigin-Name: af73fbca839f8cbe39c21f1f9e439fe9b79005c8
 2004-01-30 02:01:03 +00:00
drh
e5f50722b4 Make sure the min() and max() optimizer works correctly when there 
is a LIMIT clause.  Ticket #396. (CVS 1057)

FossilOrigin-Name: c35e50717678703763c696e3e9b265add2ca6454
 2003-07-19 00:44:14 +00:00
drh
d4d595f94c Make sure the min() and max() optimizations work on empty indexed tables. 
Ticket #296. (CVS 914)

FossilOrigin-Name: 98ef6110068e5ed3cd77a14b004f890b79b731f7
 2003-04-17 12:44:23 +00:00
drh
f570f011eb Refinements to NULL processing: NULLs are indistinct for DISTINCT and UNION. 
Multiplying a NULL by zero yields zero. In a CASE expression, a NULL comparison
is considered false, not NULL.  With these changes, NULLs in SQLite now work
the same as in PostgreSQL and in Oracle. (CVS 600)

FossilOrigin-Name: da61aa1d238539dff9c43fd9f464d311e28d669f
 2002-05-31 15:51:25 +00:00
drh
739105c72c Built-in aggregate functions (MIN, SUM, AVG, etc) should ignore NULL entires. (CVS 597) 
FossilOrigin-Name: 19ae12bef210ae5fe171f10833faa38d640c129f
 2002-05-29 23:22:23 +00:00
drh
bb113518f9 Bug fixes and additional test cases for the distinct-NULL patch. (CVS 592) 
FossilOrigin-Name: 0e268d0c0faa02c3f95e1567cf631b7a04bfbdf0
 2002-05-27 01:04:51 +00:00
drh
5cf8e8c7fa New ROWIDs are numbered sequentially. (CVS 383) 
FossilOrigin-Name: 1686196a8aea326f616bc8205df99cd84d955ec4
 2002-02-19 22:42:05 +00:00