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1096 Commits

Author SHA1 Message Date
drh
b1ec87afdb When checking for the WHERE-clause push-down optimization, verify that 
all terms of the compound inner SELECT are non-aggregate, not just the
last term.  Fix for ticket [f7f8c97e97597].

FossilOrigin-Name: ec215f94ac9748c0acd82af0cc9e7a92249462f9
 2016-04-25 02:20:10 +00:00
drh
7111c93c40 Add some missing testcase() macros to the pushDownWhereTerms() routine. 
FossilOrigin-Name: 67d7f79c5e5be41a18817c802b5c4d349e3a83a4
 2016-04-14 15:38:33 +00:00
drh
7512cb47e8 Additional ".selecttrace" debugging output when the query is transformed from a 
DISTINCT into a GROUP BY.

FossilOrigin-Name: 5a46914510af4d5557b299db65c68d5df1070766
 2016-04-14 13:06:49 +00:00
drh
6f07734349 Performance optimization the Vdbe allocator. 
FossilOrigin-Name: e2c4995bf1099cc02bcb1dc4a4631f06a870d171
 2016-04-12 00:26:59 +00:00
drh
f3c57ff54c Avoid unnecessary calls to object destructors for a small performance gain. 
FossilOrigin-Name: aec94b6ee68fe50e2cc14388281e2ef531e21d68
 2016-04-12 00:16:54 +00:00
drh
ed06a131da Carry table column types through into VIEW definitions, where possible. 
FossilOrigin-Name: fb555c3c2af7f5e62ff839658f4fba7b645d3a68
 2016-04-05 20:59:12 +00:00
drh
d7564865ad The sqlite3_column_decltype() routine should return NULL, not an empty string, 
if the column has no declared type.

FossilOrigin-Name: 605eba4a756e7185119088e2242f82691d078b01
 2016-03-22 20:05:09 +00:00
drh
0ff47e9e1b Implement FROM-clause subqueries as co-routines whenever they are guaranteed 
to be the outer-most loop of the join.

FossilOrigin-Name: c7bae50bdccb5bcf3bc22e8ac5bb6725ef13db39
 2016-03-15 17:52:12 +00:00
drh
94eaafa9ce Reduce the amount of heap required to store many schemas by storing each 
column datatype appended to the column name, rather than as a separate
allocation.

FossilOrigin-Name: 842b21162713bb141b845b01c136457a31af4ab0
 2016-02-29 15:53:11 +00:00
drh
26bcc7cf40 Ephemeral tables used to hold manifested views may not be unordered since 
they might be subject to an ordered comparison if they are part of a join.

FossilOrigin-Name: 3ef6a3153267d5328202fea24fd29ff4d5409295
 2016-02-26 04:13:39 +00:00
drh
c3489bbf77 Take the LIMIT clause into account when estimating the cost of sorting. 
FossilOrigin-Name: d491745cab951e0de70f1f79b7640ea8aff6e8bb
 2016-02-25 16:04:59 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +00:00
drh
2fade2f791 Make sure every co-routines has its own set of temporary registers and does 
not share temporaries, since a co-routine might expect the content of a
temporary register to be preserved across an OP_Yield.
Proposed fix for ticket [d06a25c84454a].

FossilOrigin-Name: ca72be8618e5d466d6f35819ca8bbd2b84269959
 2016-02-09 02:12:20 +00:00
drh
575fad6500 Add the slightly faster sqlite3DbMallocRawNN(db,n) routine for the majority 
cases where db is guaranteed to be not NULL.

FossilOrigin-Name: 0a802e96ab06e2643834b83671fa8353da1a348d
 2016-02-05 13:38:36 +00:00
drh
4a642b6060 Improvements to the way that OOM errors are processed. 
FossilOrigin-Name: c3ef03478a5788c855b3aef385d43ae7f494f440
 2016-02-05 01:55:27 +00:00
drh
b17020265b Change the P4_INTARRAY so that always begins with a length integer. Print 
the content of the INTARRAY on EXPLAIN output.

FossilOrigin-Name: 6c520d5726e80b4251338c43c405270d150ea81e
 2016-01-30 00:45:18 +00:00
drh
cc2fa4cf55 Replace the OP_SetIfNotPos operator with OP_OffsetLimit in the VDBE, for 
simpler and smaller code.

FossilOrigin-Name: 7ac017a498b6fb28343eef2d24e400c7800660d6
 2016-01-25 15:57:29 +00:00
drh
40aced5c65 Add the sqlite3TokenInit() utility function. 
FossilOrigin-Name: 7323175337b7ba85ac932ca892b28860f6a5b688
 2016-01-22 17:48:09 +00:00
drh
c263f7c4b3 Avoid unnecessary calls to memset() for a small performance improvement. 
FossilOrigin-Name: 9e8c23acf74944a165c733682a956948b15bd401
 2016-01-18 13:18:54 +00:00
drh
a04a8be2c2 When the [https://www.sqlite.org/queryplanner.html#partialsort|block sorting optimization] 
is used in a scalar subquery, be sure to exit the loop as soon as the first
valid output row is received.  Fix for ticket [cb3aa0641d9a4].

FossilOrigin-Name: cdbb0947f9ce18d6d7e29ffab5ea6a2ee5365fbb
 2016-01-13 17:50:10 +00:00
drh
9ca33fa4c2 Fix an uninitialized field in the Select object when SELECTTRACE is enabled. 
FossilOrigin-Name: fc62851667d9120f98a2641c87bbc5a2485482b2
 2016-01-12 02:00:24 +00:00
drh
ca3862dc6e Reduce the number of calls to memset() in sqlite3DbMallocZero(). 
FossilOrigin-Name: cede2bf8e42ac140a8cc75a1d173083f543ba467
 2016-01-08 12:46:39 +00:00
drh
9802947fd8 Improved OOM recovery in the SELECT code generator logic. 
FossilOrigin-Name: e6521a436d464a42b87a7d5ba5cc98235b92440a
 2015-12-03 21:47:30 +00:00
drh
f7ce4291a9 Remove unreachable branches from the decltype computation logic in the query 
planner.

FossilOrigin-Name: 4f2bcff94c672312805be1400050a7026f93a9d7
 2015-12-02 19:46:12 +00:00
dan
9a8941fc83 Have the sqlite3_column_decltype() API report the declared types for the left-most SELECT statement in a compound SELECT. 
FossilOrigin-Name: 3e1d71fcaf57c0223ab9a7366c8607f8f66bb21c
 2015-12-02 18:59:44 +00:00
dan
8836cbbcb4 Fix an obscure memory leak found by libfuzzer that may occur under some circumstances if expanding a "*" expression causes a SELECT to return more than 32767 columns. 
FossilOrigin-Name: 60de5f23424552c98aa760ac89149a3d51f895be
 2015-11-21 19:43:29 +00:00
drh
202923107d Do not allow table-valued function syntax on ordinary tables and views as those 
objects are not table-valued functions.
Fix for ticket [73eba7ba5c7c0fc].

FossilOrigin-Name: ff5716b89f99d9c4568a39f1f52524528a631623
 2015-11-21 13:24:46 +00:00
drh
80090f9221 When manifesting a view as part of an DELETE or UPDATE, be sure to include 
the hidden columns in the manifestation.

FossilOrigin-Name: 28df5dc4a9569f388af2ee0d1f016afbea132277
 2015-11-19 17:55:11 +00:00
dan
ba68f8f3f5 Fix problems with INSERT INTO ... SELECT ... statements that write to tables with __hidden__ columns. 
FossilOrigin-Name: 59bd0ec7d4327852ee8c0206b2c59d0a12484db8
 2015-11-19 16:46:46 +00:00
drh
1a1d3cd2f3 Create the new TK_ASTERISK token to represent the "*" in "SELECT *". Formerly 
that operator was TK_ALL, which was also used for UNION ALL.  Less confusion if
they operator symbols are distinct.

FossilOrigin-Name: 201ac6d449431dadc6b29faecd68b559bd64bc9f
 2015-11-19 16:33:31 +00:00
drh
03d69a6826 Only support the magic "__hidden__" column name prefix interpretation when 
compiled with SQLITE_ENABLE_HIDDEN_COLUMNS.

FossilOrigin-Name: 5490646b2eb74ea8bd5ab2690f69b9c707a0165f
 2015-11-19 13:53:57 +00:00
drh
6aed239acc Honor the "__hidden__" prefix on the columns of views. 
FossilOrigin-Name: 3071ba2bdbda7018d0a285eceb04b8527209ec1e
 2015-11-18 20:57:50 +00:00
drh
f0c9145a36 If a table column name begins with "__hidden__" then do not include that 
column in "*" expansions in SELECT statements, nor fill in that column in
an INSERT INTO that omits the column list.  <b>This branch is a 
proof-of-concept only and is not intended to ever be merged into trunk.</b>

FossilOrigin-Name: 2dbffb3a3b20dba7d7d86c8ad2e34633f616c78a
 2015-11-18 18:43:15 +00:00
drh
f7ee8965a5 Fix the column name uniquifier so that it works with zero-length column names. 
FossilOrigin-Name: 791761ebac26c82ab67bdf867117ec5b5d8b20b0
 2015-11-15 11:13:49 +00:00
drh
96ceaf8680 Code simplification in sqlite3ColumnsFromExprList(). Update the %z format 
code so that it works with buffers obtained from sqlite3DbMalloc().  Add a
testcase for the slow column name uniquifier.

FossilOrigin-Name: 9272426057b6cb2d913519ff4c97aa6e211f7d51
 2015-11-14 22:04:22 +00:00
drh
0315e3cc14 Use a hash table to improve the preformance of column name uniqueness checking. 
FossilOrigin-Name: 5b08f29f458c600401860c7d70d8174cf61e69f8
 2015-11-14 20:52:43 +00:00
drh
ebed3fa3e1 Use randomness to prevent showness in the generated-column-name uniqueness 
checking.

FossilOrigin-Name: 6266712968a2cdcd6f5a3007d60c2cf1b3faf912
 2015-11-14 16:47:23 +00:00
drh
6e7722669e Proposed fix for an infinite loop bug in the WITH clause semantic analysis 
logic.

FossilOrigin-Name: 028475cb17a4b50baf0e9aba9bd3403d0a5d03b0
 2015-11-07 17:48:21 +00:00
drh
2476a6f2cb Enhance TreeView to show WITH clauses. Add an assert to detect the 
infinite loop behavior when certain kinds of errors occur on a nested
WITH clause.

FossilOrigin-Name: 2040d88e877bdb69de125a047cefb4a1558e89e8
 2015-11-07 15:19:59 +00:00
drh
0030aaad67 Merge recent enhancements from trunk. Version now 3.9.1. 
FossilOrigin-Name: 26fa091d68e89a0b6af61ba706d23a9f37e8025a
 2015-10-16 20:53:57 +00:00
drh
ce78bc6e7e Enhance the use of the column cache for UPDATE statements, making them 
more efficient for the case where a column is modified to be an expression
of other unmodified columns.

FossilOrigin-Name: 871e091df651b2275a672c35ff938bd4b6db0d7f
 2015-10-15 19:21:51 +00:00
drh
99f4647ef5 Merge in all the 3.9.0 updates from trunk. 
FossilOrigin-Name: 29444149342fc6b1ea8cd34c2c8e1fcb06eaa7ed
 2015-10-14 20:09:54 +00:00
drh
bfad7be78a Detect and report circularly defined views even if the views have the 
columns defined in the CREATE VIEW statement.

FossilOrigin-Name: 9ab9c8c6d747647f8ade58c2c4812fc69a813368
 2015-10-11 20:39:46 +00:00
drh
2906490b71 Remove an unreachable branch in the query flattener substitution logic. 
FossilOrigin-Name: 46ee3453a31b5e793d5aaad471cec1b1a11ab2cf
 2015-10-11 20:08:31 +00:00
drh
d12b636330 Improved substitution logic in the query flattener. Saves code space, and 
(more importantly) works correctly with table-valued functions.

FossilOrigin-Name: 3d0bd95e977db50c314d33ec292f99e0539d7b4a
 2015-10-11 19:46:59 +00:00
drh
728e0f91bb Compiler warning fixes: Rename some local variables from "j1" to avoid a 
name collision with the j1() bessel function in the math library.  Omit a
dummy initializer that gcc 4.6.3 does not like.

FossilOrigin-Name: 9ddef84d432813f3ece8012047d08441caa3315d
 2015-10-10 14:41:28 +00:00
drh
8b0cf38a12 Simplifications to the VDBE bytecode that handles LIMIT and OFFSET. 
FossilOrigin-Name: 041df7c2f14b95868a08090354ebb3308050790e
 2015-10-06 21:07:06 +00:00
drh
9f1ef45f6a Fix the LIMIT and OFFSET handling for UNION ALL queries that contain a 
subquery with ORDER BY on the right-hand side.  Fix for ticket
[b65cb2c8d91f668584].

FossilOrigin-Name: 4b631364354068af95a01630469cb6fbfe8b52fd
 2015-10-06 17:27:18 +00:00
drh
e2b7d7a0a1 Remove dead code, replacing with assert() statements that make sure the 
code really was dead.

FossilOrigin-Name: 0e317dda5dfd35b742afd70dacb5bfb39aa3fc4a
 2015-09-29 15:50:04 +00:00
drh
2679f14fd9 Report an error if the number of named columns in a VIEW is different 
from the number of result columns in the SELECT statement that implements
the VIEW.

FossilOrigin-Name: 6e4ac0be2de1a16fcbb2a314504122ad95aa257e
 2015-09-25 13:42:55 +00:00