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1577 Commits

Author SHA1 Message Date
drh
163c29c5f3 Merge enhancements from trunk. 
FossilOrigin-Name: 25ee3000e94d60d8c1d7b980f416dcc33eb11105
 2015-09-03 14:39:33 +00:00
drh
34de0c8c5e Merge enhancements from trunk. 
FossilOrigin-Name: 1ab10cbf27245961b40eda1ce70f35646f0a9966
 2015-09-03 14:18:12 +00:00
drh
076e85f59c Add the sqlite3VdbeLoadString() and sqlite3VdbeMultiLoad() routines to help 
with code generation, especially on PRAGMAs.  Rename sqlite3VdbeAddGoto()
to just sqlite3VdbeGoto().

FossilOrigin-Name: 847387ec8e6fef283899578fb232b2c23b00ee5b
 2015-09-03 13:46:12 +00:00
drh
2991ba050b Add the sqlite3VdbeAddGoto(v,i) routine as a shorthand for 
sqlite3VdbeAddOp2(v,OP_Goto,0,i).

FossilOrigin-Name: be78f413df1b0d874b44a866ef6bf17543d7e8a2
 2015-09-02 18:19:00 +00:00
drh
4970d4032e Merge enhancements from trunk. 
FossilOrigin-Name: 29570a604806e2a60a8eef7eaf1dce022d2a7004
 2015-09-01 18:31:19 +00:00
drh
7d3d9daea2 Remove unreachable branches. 
FossilOrigin-Name: fd4da2318cc032d7c355376e440d4a05d7ab8793
 2015-09-01 00:42:52 +00:00
drh
8492653c37 Always assume that indexed expressions can generate a NULL. Get 
indexed expressions working for the case of two or more expressions in
the same index.

FossilOrigin-Name: cc60321a67bf9f169c090b47afb505f589a6925e
 2015-08-31 19:38:42 +00:00
drh
47991425cb Improved analysis and usage of indexed expressions in the query planner. 
FossilOrigin-Name: f8893696387cba9d293a05a68dc38228077b3dc5
 2015-08-31 15:58:06 +00:00
drh
31a5d34283 Fix the OR-optimization so that it always ignores subplans that do not use an index. 
FossilOrigin-Name: cf452028d1be2c5578a07f6e21b4d8b613373eb8
 2015-08-27 23:42:43 +00:00
drh
2dc292930d Fix the OR-optimization so that it always ignores subplans that do not 
use an index.

FossilOrigin-Name: 66f92a16866e5825363636b9cc4b8f9b29d9e84d
 2015-08-27 23:18:55 +00:00
drh
c7c4680ffd Fix EXPLAIN QUERY PLAN output for indexed-expressions. Fix another 
obscure fault in the WHERE term scanner.

FossilOrigin-Name: 73d361ce9e4d72c943def8b0b3caa227f9199aed
 2015-08-27 20:33:38 +00:00
drh
29d03f6517 Fix problems in the indexed-expression handling in the optimizer. 
FossilOrigin-Name: 03375017691d5b480e73d712c4318632e835060c
 2015-08-27 19:56:49 +00:00
drh
6860e6fa6f Activate the ability to use expressions in indexes in a query. There are some 
test failures, but mostly this seems to work.

FossilOrigin-Name: 42f93f582eccd8a778189aa6c113874f995ab751
 2015-08-27 18:24:02 +00:00
drh
b377020ca9 Merge changes from trunk. 
FossilOrigin-Name: c80e9e8e8cc1e7676d7c782ee0827726875db79e
 2015-08-27 16:07:02 +00:00
drh
bb52308f3d Adjustments to the WHERE term scanning, to better handle scanning terms of 
an index.

FossilOrigin-Name: 5611130a595e7f0b6d5f21d76f2755e9c09c7810
 2015-08-27 15:58:51 +00:00
drh
a3f108e93d Reduce the size of the WhereScan object by 24 bytes while also clarifying its 
operation.

FossilOrigin-Name: cbc3c9a8bf169ae0b21f26855038502c6cc25cfe
 2015-08-26 21:08:04 +00:00
drh
567cc1e407 Move sqlite3IndexColumnAffinity() inside of SQLITE_ENABLE_STAT3_OR_STAT4. 
FossilOrigin-Name: b3732a4e1b42a86675d89766cb8089914e2fab9a
 2015-08-25 19:42:28 +00:00
drh
e910769817 Use the sqlite3IndexColumnAffinity() routine to quickly and correctly find the 
affinity of an index column.

FossilOrigin-Name: 1ee089a72d789002a0a377347fc51e08ab32fb14
 2015-08-25 19:20:04 +00:00
drh
c1bd84124b Merge recent enhancements from trunk, including table-valued expressions. 
FossilOrigin-Name: b9927c876c1d4e146cb6a603d82cd2489594084d
 2015-08-20 23:45:59 +00:00
drh
01d230ce05 A list of arguments following a table name translates into equality 
constraints against hidden columns in that table.

FossilOrigin-Name: 40e12cfe4c29475417ba89fb637b4c763cf74016
 2015-08-19 17:11:37 +00:00
drh
8a48b9c0b1 Minor refactor of the SrcList object so that it is able to hold the argument 
list to a table-valued-function in the FROM clause.

FossilOrigin-Name: b919376147597c4b73421abe5788f893baf1560b
 2015-08-19 15:20:00 +00:00
drh
2f2b02785a Fix the cursor hint mechanism so that it does the right thing for indexed 
lookups.

FossilOrigin-Name: 581e3d4988e98975fea5daaeb9f854c54a4976b7
 2015-08-14 18:50:04 +00:00
drh
cf599b6ade Enhance the query planner so that it is able to use partial indexes that use 
AND-connected terms in the WHERE clause.

FossilOrigin-Name: 065765902d2774d7432b9c00ea2efed26e0aaa5e
 2015-08-07 20:57:00 +00:00
drh
36b80349b7 Add the OP_ColumnsUsed opcode (when compiled with 
SQLITE_ENABLE_COLUMN_USED_MASK) as a hint to the b-tree layer as to which
columns of a btree cursor will be used.

FossilOrigin-Name: 711a176cbfad5dde6defa9648fba6d0d663af134
 2015-06-12 12:54:15 +00:00
dan
4430b40934 Remove some repeated lines of source code. Probably introduced by careless cut'n'pasting. 
FossilOrigin-Name: a34cd71c8aafaece04a2332a127e9b8e99c1403c
 2015-06-09 10:58:51 +00:00
dan
35175bf7ab If a query contains "FROM t1 LEFT JOIN t2, t3, t4", ensure that tables t3 and t4 are not scanned before t2. The trunk already does this. 
FossilOrigin-Name: 0d9edfab9fb61322620f188b48ae2a1798a07581
 2015-06-08 18:48:29 +00:00
dan
4f20cd402b Avoid passing constraints that are unusable due to LEFT or CROSS joins to virtual table xBestIndex() methods. 
FossilOrigin-Name: 80ee56dda7db3860f8be5f6968c8745138f8453f
 2015-06-08 18:05:54 +00:00
drh
6c1f4ef217 Split more subfunctions of where.c out into a new whereexpr.c source file, 
for improved maintainability.

FossilOrigin-Name: 46ef95c108ad8961f2bf3d2dc839d4fb1fddd770
 2015-06-08 14:23:15 +00:00
drh
6f82e85a80 Split out the bulk of the actual VDBE code generation logic from where.c 
into a new file, leaving behind the analysis logic.  This makes the original
where.c smaller and hopefully easier to edit.

FossilOrigin-Name: faa0e420e93a2bc1c84df9eb9fef4748d29ce339
 2015-06-06 20:12:09 +00:00
drh
b121dd14ac Code simplifications in select.c and where.c. 
FossilOrigin-Name: 4f20ac90bce8bd7ba43ef59af5cc4ef7aa282fe8
 2015-06-06 18:30:17 +00:00
drh
97bae794c2 Add a new opcode to the VDBE that gives the b-tree a hint about the set 
of columns in a table or index that are actually used by the query.

FossilOrigin-Name: f167bba446b78dd7538d0b2bae3e6678f3b1ba28
 2015-06-05 15:59:57 +00:00
drh
d62fbb50e6 Change the name of SrcList.a[].zIndex to the more descriptive 
SrcList.a[0].zIndexedBy.

FossilOrigin-Name: 6a9cf063379118dbb95c6cdc6d60af50e9867177
 2015-06-04 12:08:53 +00:00
drh
05883a3409 Rename SQLITE_AFF_NONE to SQLITE_AFF_BLOB. 
FossilOrigin-Name: bce3f04186cd2d69414a5a98b5b77dc8f060554a
 2015-06-02 15:32:08 +00:00
drh
d092ed4355 Add some extra source-code comments and a test case. 
FossilOrigin-Name: 6d410442fb532e2cf0ad1859bc9e843651f8ff4d
 2015-05-29 14:36:30 +00:00
drh
7b3aa08e22 An attempt to allow automatic index creation on subqueries accessed via 
co-routine.

FossilOrigin-Name: 521345add67e9dfd7df1446eb942aa0d84b9e6eb
 2015-05-29 13:55:33 +00:00
drh
c4d56dd74b Use an ALWAY() on conditionals in the transitive constraint logic that are 
always true as far as we know.

FossilOrigin-Name: 204e567f68e4b3e069f04ca0643c6e5db781d39f
 2015-05-18 12:18:37 +00:00
drh
69c15fee98 Refinements to the determination of when an A==B term is an equivalence. 
Add test cases.

FossilOrigin-Name: 6bfaf525cac2e0c0a4a3bd3a1fc7bf5bd3234303
 2015-05-18 11:34:52 +00:00
drh
5820118da5 Further restrictions on the use of the transitive property in WHERE clauses. 
FossilOrigin-Name: 8c886c43ff0bd5953d289534791d2c6b9dc25445
 2015-05-16 20:51:25 +00:00
drh
ea19cc10f5 Fix the transitive constraint processing to only allow transitivity if the 
operands of the == or IS operator have compatible affinities.

FossilOrigin-Name: a46a247fbcfe6e63b12cef31353835295a650c9b
 2015-05-16 19:17:17 +00:00
drh
e655a0e34e Fix a typo in a comment. No changes to code. 
FossilOrigin-Name: ee4b74250ad7a4061421d44b490cb79f649b3720
 2015-05-16 18:31:44 +00:00
mistachkin
4e5bef8c00 Minor coding style change, adjust new local variable casing for consistency. 
FossilOrigin-Name: 1a4628c66c632d2aff02bf134ddf7adceb04fb84
 2015-05-15 20:14:00 +00:00
dan
3072b537f5 Do not assume that "col IS ?" matches at most a single row of a UNIQUE column unless the column is also NOT NULL. 
FossilOrigin-Name: e038ce8955e785afcc07bb22499955bbd22a7af4
 2015-05-15 19:59:23 +00:00
drh
4a00b33c02 More test cases. Remove some invalid testcase() macros. Rearrange some code 
for improved testability.

FossilOrigin-Name: b3676377b257bd8bb7fefe9c365d76cdc9e44856
 2015-05-14 13:41:22 +00:00
drh
ee14587c39 Add testcase() macros. Get transitive WHERE clause constraints on IS operators 
working again.

FossilOrigin-Name: d195d4a65d7184e34a2a08c3ac3db7f6c8c1c21c
 2015-05-14 13:18:47 +00:00
drh
e8d0c61f0a A new implementation of indexing with the IS operator that works correctly 
when the IS operator is in the WHERE clause and the operands are from 
opposite sides of a LEFT JOIN.

FossilOrigin-Name: 4541688b3f56f5cd3d5b299594b58c577ad633bb
 2015-05-14 01:05:25 +00:00
drh
9be1870994 Simplified implementation of indexing with the IS operator. 
FossilOrigin-Name: 95b1f9bf14e490c6c6bba9ea78aeab712a44aab5
 2015-05-13 19:33:41 +00:00
drh
e0cc3c296c Add testcase() macros and comments and a few test-cases. 
FossilOrigin-Name: 24263d08b11c88416d270013bdaf5ff45125cb4d
 2015-05-13 17:54:08 +00:00
drh
fcd49531c9 An early attempt to get indexes to work with the IS operator. This code 
passes tests, but much more testing is needed to verify that it works on
all corner cases.

FossilOrigin-Name: 6f7f1673d00d216a5aa456acb44793a14f3b3d91
 2015-05-13 15:24:07 +00:00
drh
c049057242 Cleanup of the sqlite3StrAccumInit() function. No functionality changes. 
FossilOrigin-Name: 7952c32268aa650d9ee946d5bfe190f712e3bbe6
 2015-05-02 11:45:53 +00:00
dan
f89aa47f80 Fix an obscure memory leak that could follow an OOM in where.c. 
FossilOrigin-Name: 08ec9f2f5a446774bb8e9b9b0ef463dd5458d28e
 2015-04-25 12:20:24 +00:00