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Commit Graph

2576 Commits

Author SHA1 Message Date
drh
dc81902445 Do not use an expression index on a generated column if generated column
has the wrong affinity.  dbsqlfuzz 65f5eb57f8859344d5f1f33e08c77ee12960ed83

FossilOrigin-Name: e95439119ac200cb47d0e277622f41ee7986b364487cd252b485ce5fa030d70f
2023-03-03 15:12:46 +00:00
dan
06382de2a3 Change the name of SQLITE_DBCONFIG_STMT_SCANSTATS to SQLITE_DBCONFIG_STMT_SCANSTATUS.
FossilOrigin-Name: a63e4a150b505fc309fac847131009ee9965eb1b798ebcb202ec8b52f9189240
2023-02-28 20:04:01 +00:00
dan
45163fc45e Add an sqlite3_db_config() option - SQLITE_DBCONFIG_STMT_SCANSTATS - for enabling and disabling the collection of sqlite3_stmt_scanstats() statistics in SQLITE_ENABLE_STMT_SCANSTATUS builds. Collection of statistics is disabled by default.
FossilOrigin-Name: 0f5579bef27b84ee855065cfe87703c51e1f9773906a9e0d4e4dafc90bd0e553
2023-02-28 19:39:59 +00:00
drh
ad96db8df5 Allow the sqlite3_config() interface to be invoked at any time for a few
choosen options:  SQLITE_CONFIG_LOG, SQLITE_CONFIG_URI, and
SQLITE_CONFIG_PCACHE_HDRSZ.  This list will likely change before release.

FossilOrigin-Name: e1702eb48d13c7c9b7605f1e77242672222c53059edcdc4e9cea59510715822a
2023-02-23 14:22:29 +00:00
drh
7defd20cb0 Provide an optimization-disable mask for this optimization. Do not do the
optimization if the subquery is an aggregate or is distinct, but allow it to
be an ephemeral subquery.  Do not omit columns that are used in the ORDER BY
of the subquery.

FossilOrigin-Name: 6b1a1f374d1372f11f5420d99645b218867100bf070bd3a8885bf5f00c189dff
2023-02-16 18:04:49 +00:00
drh
601e4d4a0f Back out the 'txn' enhancement to date/time functions. The duration of a
"transaction" is confused and needs to be straightened out prior to moving
forward with this change.

FossilOrigin-Name: 4a145f07322d768a07619bed27e0390d50f3a01d07787b9296234a5ceb6f1218
2023-02-08 20:29:48 +00:00
drh
03b30b7abe Always use 64-bit integers for stats associated with STAT1 and STAT4.
FossilOrigin-Name: 6647d1cb8b53102c8114b1f3e34173d907504d78aa3140eab53f88027a36660b
2023-02-08 17:28:42 +00:00
drh
3393ee7ff6 Simplify the code and add test cases.
FossilOrigin-Name: d3bed4caff561e71c396cc869c5b4d9bf216ba203485e738c12ec62741f1aba5
2023-02-07 23:55:59 +00:00
drh
d4af882a1b Add support for the 'txn' argument to date/time functions that works like
'now' but keeps the same time for the entire transaction.

FossilOrigin-Name: 5e4f45af96247e29910403a63ac148cb313b005f9c014b37a9a49d98f5fef9a6
2023-02-07 21:55:14 +00:00
drh
2fc9dc9330 Fix sqlite3_prepare() so that it only invokes the progress handler on every
N-th call to sqlite3ProgressCheck(), where N is the progress handler step
count.  Also fix faulty asserts exposed by the ability to interrupt in the
middle of sqlite3_prepare().

FossilOrigin-Name: 05461651599bb490ac6cfd893645dabab9cccedc6adcce15aee2487b2ea6027a
2023-01-12 19:51:49 +00:00
drh
f84cbd1676 Attempt to provide a mechanism to do early termination of long-running
statement preparation by invoking the progress handler at strategic points
during sqlite3_parpare().  This experiment shows that sqlite3_prepare() might
leave the resulting prepared statement uninitialized following an interrupt.

FossilOrigin-Name: 79636f2d80aee70832913a78933da2a7e30cc037810b93903ebbc1925ea93fef
2023-01-12 13:25:48 +00:00
drh
6791891f92 Fix JSON functions so that they work correctly under PRAGMA trusted_schema.
[forum:/forumpost/c88a671ad083d153|Forum thread c88a671ad083d153].

FossilOrigin-Name: 51a5d83c425d2e31508b73074d0076156817afb19003f847d16bf4a69ae5077b
2023-01-09 12:01:30 +00:00
drh
cef97068cd Remove the unused "sqlite3StackAllocZero()" macro.
FossilOrigin-Name: f0ca57207e9f3ab401264498f65c249b479d9e0da7158e001b002584ac67dd0a
2023-01-04 11:58:36 +00:00
drh
fbde3f50bf Avoid an unnecessary call to strlen() in the sqlite3VdbeMemStringify() routine,
for a performance increase and size reduction.

FossilOrigin-Name: 284382d37850f469dc4bf3ab8efd2f20971554e897f1ba3e94d3f2f0c35d97d0
2023-01-03 18:51:18 +00:00
drh
3547e4997f Fix lots of harmless, nuisance compiler warnings, mostly unused parameter
warnings in extensions.

FossilOrigin-Name: c14bbe1606c1450b709970f922b94a641dfc8f9bd09126501d7dc4db99ea4772
2022-12-23 14:49:24 +00:00
stephan
dc02d5658b Squelch a new (and, in this case, harmless) compiler warning.
FossilOrigin-Name: a02e19dd6ce00492f3d187e3c3c9bde4d9d1ee9a23616e62ea3590eec95652bd
2022-12-23 11:32:06 +00:00
drh
79b9bc4452 More efficient implementation of large precisions on the "%c" format for
the built-in printf().  This is an effort to avoid a reported
timeout on a (ridiculous) query generated by OSSFuzz.

FossilOrigin-Name: 371f9b88387a44a5f820279d79733d1deb7eafc72f320ec47a11679bbdbb49ef
2022-12-21 19:11:56 +00:00
drh
98164c3452 Do not use indexed expressions to replace the expression being indexed on a
RIGHT JOIN as that leads to problems, as shown by
dbsqlfuzz a644e70d7683a7ca59c71861a153c1dccf8850b9.

FossilOrigin-Name: f113eebdbe68246fd38d640b0cdf0fd73ab5d2abad9226274dfa2e41fe286bf0
2022-12-20 01:48:43 +00:00
drh
00d6b2755f Create a new affinity called FLEXNUM that works like NUMERIC except that it
never tries to convert integer to real or real to integer.  The affinity is
only used internally - it is not possible to create a table column with this
affinity.  This affinity is used on subqueries and views that are built off
of a compound SELECT and where the datatype is controlled by a CAST expression.
dbsqlfuzz c9ee6f9a0a8b8fefb02cf69de2a8b67ca39525c8

FossilOrigin-Name: 44135d6ea84f7ba6b36549954b38a8bc048d5ffea5a9779e35950afa4eb2dfb2
2022-12-15 20:03:08 +00:00
drh
604314d94e Merge all the latest trunk enhancements into the coroutines-exp2 enhancement
branch.

FossilOrigin-Name: ea278438b72e85d217e72c836cbefd68bd8b336baf33507b2d8d12ef436424cd
2022-12-14 17:52:15 +00:00
drh
ed07d0ea76 If the SELECT that implements a subquery or a VIEW or a CREATE TABLE AS is
a compound with different result datatypes on two or more arms of the compound,
then the overall column type becomes BLOB (ANY).

FossilOrigin-Name: 6ebb178c6b688ebd632e91a5ec4c748567833037c679ab3d72fb770deb230fe1
2022-12-14 14:41:35 +00:00
drh
a8b5c8739c Back out the part of the change in [88a05141c28e5ff1] that adds affinity to
the materialization of a view, as the affinity can be undefined for a compound
query.  This passes all TCL tests, but shows failures in the TH3 tests derived
from [forum:/forumpost/6f842bc5b2dadcb2|forum post 6f842bc5b2dadcb2], presumably
because the WHERE clause of the query uses constraints of the form
"source_crs_code='8675'" instead of "source_crs_code=8675".  Perhaps further
changes on this branch should reimplement affinity on joins in cases where
the affinity is unambiguous.

FossilOrigin-Name: fe5a77bcc4de8f49cc4fe6bd2e2e1f31da8d3bc84120daaa99eb853b06291d15
2022-12-14 09:06:45 +00:00
drh
9e66087a49 Refactor the sqlite3SelectAddColumnTypeAndCollation() routine. Improved
comments.  Now called sqlite3SubqueryColumnTypes().

FossilOrigin-Name: 4dfb1b450b87e2c6207c83c102b785781d1dbdeadbeeab6a83f96d58bb96cfbf
2022-12-13 15:54:43 +00:00
drh
93f41e22d4 Remove the SQLITE_PREPARE_SAFEOPT flag. The name is obsolete and it is at the
wrong level.  Instead use the SF_UpdateFrom flags on the Select object.

FossilOrigin-Name: 78723a9a7e72b42d28fc5645661da17f20cedcf864819b861800ad9340007be1
2022-12-09 18:26:15 +00:00
drh
ad9ff1d5f2 Simplified experimental changes to promote the use of co-routines. Less
cruft than the coroutines-exp1 branch, but still does not work.  Checked in
as a work-in-progress.

FossilOrigin-Name: e2318a30bf6ad2aeb4c4cb29661bc24ff78eb51bf07decc4b8da1ecac0015ef0
2022-12-06 15:24:05 +00:00
dan
231ff4b027 Enhance the sqlite3_stmt_scanstatus() API and add sqlite3_stmt_scanstatus_v2(). For creation of easier to read query performance reports.
FossilOrigin-Name: 55800833645739efeddcacef464c623931cb6aeb43f4219b4e4faf473c25c8bb
2022-12-02 20:32:22 +00:00
drh
2a757658a0 Attempt to rationalize the bits associated with ".wheretrace". Provide
a decoder key in sqliteInt.h for what each bit is intended to do.

FossilOrigin-Name: 8ec361695a107a94f2cf6a7fe509656a99d85d49bd7c74133c69903f059a2675
2022-11-30 19:11:31 +00:00
drh
7741f3457a Change the handling of hwtime.h to make it easier to compile performance
measurement builds that make use of hwtime.h.  This should not affect
productions builds.

FossilOrigin-Name: f64a224244743ab121371abd516fccbfc93c110e0952211764bd1b217e792c1b
2022-11-29 17:52:04 +00:00
drh
7960da0346 Improved comments. Add assert()s to verify that the AggInfo structure
is unchanged after registers have been assigned.

FossilOrigin-Name: 5200b84195ee1ccaa387f7032eae3d463724c48cb53ba0251bbc79e927dd9752
2022-11-25 13:08:20 +00:00
drh
590f013a87 This attempt at modifying AggInfo to make use of indexed expressions does not
work.  It gets an incorrect answer for the test case shown in the ticket.

FossilOrigin-Name: 84c06023f4a1606664fdb9811312603b31f7c94a43d0e443ba7dde7fdba029e3
2022-11-23 17:56:00 +00:00
drh
58c0652923 Merge enhancements and fixes from trunk.
FossilOrigin-Name: f8932e04d4d18eb9d71edda15aa08af2eb139ff14d77ca147ea6e9b173e0f5e0
2022-11-22 20:58:18 +00:00
drh
c7c5b8a508 Include the treetrace bitmap comment accidentally omitted from the previous
check-in.

FossilOrigin-Name: db07471c531766a8eec1d5b41c9fd0283b5e64ee13166dc3391f70a1e1946121
2022-11-22 19:56:54 +00:00
drh
cbef156d93 Merge trunk fixes and enhancements into the agg-with-indexed-expr branch.
FossilOrigin-Name: 070634781a5eb41f96b001e48b064e3cd8c82314f576335eb1fcd43792179291
2022-11-22 19:51:16 +00:00
drh
5d7aef16bf Rename the SELECTTRACE macro to TREETRACE, so that is corresponds to the new
CLI command.  Renumber all of the bits in the bitmask used to enable
various kinds of tracing, and add a trace bitmap decoder in sqliteInt.h.
Changes to debugging logic only.  No (intentional) changes to production code.

FossilOrigin-Name: 8036445a36d9d982c1305935e7e37367bdf9e466b923eb6286b52524802e3ccd
2022-11-22 19:49:16 +00:00
drh
3c8e438583 Since the memory registers used by the columns and functions of an
AggInfo object are sequential, it is not neecessary to remember each register
separately.  We can simply remember the first one and do the math when
others are needed.

FossilOrigin-Name: dc5bd34963b761c819c565653156d0befbf65cc2cc5dc4113b0ce952450f0352
2022-11-22 15:43:16 +00:00
drh
89e5dfac01 Omit the unnecessary AggInfo.mnReg field.
FossilOrigin-Name: d79c58ef08b917bacc0f24d210d8eb23f659f955c219b4757af42eee8f17099b
2022-11-22 14:31:13 +00:00
drh
ff5e4ecced This is the first in what is anticipated to be a long sequence of incremental
changes aimed at improving aggregate query processing, and in particular
helping aggregate queries take better advantage of indexes on expression.
The end goal is to resolve ticket [99378177930f87bd], though it remains to
be seen whether or not I can get there with this approach.

FossilOrigin-Name: cba837eae93f6b842d4e78ef00661a4f09deb99c53f12b3e8f46763749602597
2022-11-22 13:33:58 +00:00
drh
03af6d7157 Change the name of the Parse.pIdxExpr field to pIdxEpr so that the name is
distinct from all other identifiers in the code and thus less confusing.

FossilOrigin-Name: a2962d0187534f3496282b48efbf38dabcd226bf8972be925c8433c55a8853fe
2022-11-21 16:40:12 +00:00
drh
cf3107c7d4 Databases created using sqlite3_deserialize() should report their filename
as an empty string, not as "x".  Fix for ticket [53043c9793715f08].

FossilOrigin-Name: ff494449efd475878c549728cc22ee9b12d13674068781747fc042a0c1bd09c8
2022-11-19 00:08:35 +00:00
drh
dc5e8c63bd Improvements to comments. Change the "optimization_control" TCL command
in the test harness so that it returns the new optimization mask, for
verification.

FossilOrigin-Name: a3a500127d4752ee05c183e9ac97a2bc27768bf7063b04b5c1405cd3fd3931f5
2022-11-01 12:01:10 +00:00
drh
5fdb9a352c Enforce column affinity on the materialization of a subquery or view.
FossilOrigin-Name: b6692de374d7f489d8cf8877bdfef19501bc5ecb0781d42750807eeb58f2e7cd
2022-11-01 00:52:22 +00:00
drh
705d7be62d Remove the sqlite3StdTypeMap global constant that was made
obsolete by [aa6e908619624867].

FossilOrigin-Name: 3dfdfb3f12edb3f4267942598efd05d573e13b7c5d6cdbc3404373f41b8993dd
2022-10-26 11:11:31 +00:00
drh
7704a535d0 Fix typo in comment.
FossilOrigin-Name: f65c95658fe4d30817da8de7eb88e823ea1cd8be40e347d626870bad3cc13359
2022-10-24 18:42:45 +00:00
drh
99a37ca779 Add a comment to a previously undescribed member of the Walker union.
FossilOrigin-Name: 69d704224e9ed022fcec591beff2ffcc4daf3e7fc586debfdcf00b25c1fddd87
2022-10-24 18:33:50 +00:00
drh
54cc766b41 Enhance the query planner with the ability to discern when an index is
covering even when it indexes columns well beyond the 63rd column.

FossilOrigin-Name: 1390417be45dd84e9118f6e761f23b8ff7476d26411e165bbaab678881e4eadd
2022-10-22 20:13:46 +00:00
drh
5723c659fd Clarification on the meaning of SrcList and SrcItem and especially the
SrcItem.colUsed and Index.colNotIdxed fields.  Comment changes only - no
changes to code.

FossilOrigin-Name: d96f6cc8475ae5509b8bff2db75e3c6f69a214d58d8979fbc0162ae488a040dc
2022-10-22 13:49:35 +00:00
drh
c046f6d4d9 Add a bit to the optimization disabling mask for the indexed expression
optimization.

FossilOrigin-Name: 56df1482ab45d4d41f937b27c5a877b52fa082bfc6809ea682b62b47a51333de
2022-10-20 16:30:05 +00:00
drh
63b3a64ca6 The generalized indexed expression optimization of [2435112867fbd7b6] makes
the prior [a47efb7c8520a011] enhancement from 2017 obsolete.  This check-in
removes the older optimization.

FossilOrigin-Name: 56442c9bdd7844454c79acf83323380ea3509cb2e0b9a3d538a6b51726ae6d07
2022-10-20 13:36:32 +00:00
drh
7a2a8cee5a Improved byte-code comments for the OP_Column opcodes used by the
indexed expression optimization.

FossilOrigin-Name: bf6d837fddbf74d5b3f40ad01ea4564edfac00b651d6f3f0e996cc5dc18bb06c
2022-10-18 20:27:02 +00:00
drh
e70d458340 Improved comments and function names. No logic changes.
FossilOrigin-Name: 8f460b3b15bf4b88a224907d2f83e4ed6bf84d6b3f480008a1b187ea49c6ce1d
2022-10-17 14:46:39 +00:00