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15917 Commits

Author SHA1 Message Date
dan 0546027cd7 By default, do not use memory mapping to access the temporary files used for external sorts. The old behaviour (to use memory mapping by default) may be restored by building with SQLITE_ENABLE_SORTER_MMAP defined. 
FossilOrigin-Name: 306694dfb462f9d1f128461e7a8f15a0bb9b21fbc696caa1832f4b20749490d1
 2021-08-12 14:22:30 +00:00
drh a76b151dab During DELETE, if an index entry is missing, do not raise the 
SQLITE_CORRUPT_INDEX error (added by [f339f31f9e9a856b]) if in
"PRAGMA writable_schema=ON" mode.

FossilOrigin-Name: 19e56291a7344c7aa69e2845f11cb865ee10a6b89a00bbe74b3babbeebe0357b
 2021-08-11 18:43:54 +00:00
drh df67ec08ff Do not apply the push-down optimization to CTE subqueries that will be 
reused in other contexts in where the same optimization is unlikely to
be valid.  Fix for the bug reported by
[forum:/forumpost/d496c3d29bc93736|forum post d496c3d29bc93736].

FossilOrigin-Name: a7ce29a6ef2e0362bbc9b23719d936dce07209b2651153c774682f599bbd888e
 2021-08-11 13:48:56 +00:00
drh 834c688171 Improved comment on the OP_OpenDup used to get a new cursor for a 
reused materialized CTE.

FossilOrigin-Name: b1926cc0ab2b81c7df30c4baa6014efcfddb9631f6e46a55c1cec0113ee1afdc
 2021-08-11 13:19:13 +00:00
drh f9d349a80d Fix a compiler warning in pcache1. Reduce the maximum size of a pcache1 
cache to 2147418112 pages.

FossilOrigin-Name: 4bc93658aa563f2fa84f7f85f7f9f336dc80425640140c0fc2aec4a3606fad48
 2021-08-09 19:54:27 +00:00
mistachkin bdf15bbd62 Further improvements to the eOpenState bit values. 
FossilOrigin-Name: d44f74f14a387960ce105913526b572f4a3d1935351c6aab10cee85946488a9e
 2021-08-09 18:13:38 +00:00
drh 8a72882425 Ensure that the pcache1 cache size does not get so big that it overflows 
the integer that is keeping track of the cache size.

FossilOrigin-Name: bf9d70fc2fde06a3f132270a26d4abe321687169066aff26ad9e92757c7f9ee4
 2021-08-09 18:07:06 +00:00
drh 9d16fb1c09 Fix harmless compiler warnings and improve the presentation for the new 
--threadsafe option to the CLI.

FossilOrigin-Name: 7929dc2f6f304b077c174d41711b49a24120adeb0b29cb6acb4d6a40852d7e00
 2021-08-09 17:45:00 +00:00
drh af6d1afd24 Undocumented "--threadsafe N" option added to the CLI for testing purposes. 
One of SQLITE_CONFIG_SINGLETHREAD, _MULTITHREAD, or _SERIALIZED is called
depending on the value of the N integer.

FossilOrigin-Name: 2d8f297c115f378854c1f2198e47ac5af5f222a5de8cc7575c42154094e71b53
 2021-08-09 17:37:58 +00:00
drh c806917441 Improved Hamming bit-distance between the SQLITE_STATE constants. 
FossilOrigin-Name: 5100b0456bc91f11e4a0bcf0d426ae4d8328cd9341ee2f9c83d0fa9f73047a83
 2021-08-09 17:36:22 +00:00
drh 687d74dfcc Fix comments associated with sqlite3.eOpenState. No logic changes. 
FossilOrigin-Name: fd8f498f5d5f7fcb78dd8f6f9323d20b9e2904b249ec735477a0f03cb47b8561
 2021-08-09 13:06:59 +00:00
drh 5f9de6ecf4 Refactor sqlite3.magic into sqlite3.eOpenState. 
FossilOrigin-Name: e5d6512aa1fa0016a679c6e0cb665a0c67ad16f1daa0c18a96b2ebae1beefd15
 2021-08-07 23:16:52 +00:00
drh 15482bc3f3 Fix harmless compiler warnings. Omit redundant copies of os_common.h and 
hwtime.h from the amalgamation.

FossilOrigin-Name: 091427007818537bb2f860c42dad867cb19050899186d4d180d195a1c6a98798
 2021-08-06 15:26:01 +00:00
drh 65b400931d Store the collating sequence name for each column of a table as an 
extension to the column name, for an additional savings in the heap space
needed to hold the schema.

FossilOrigin-Name: 832ac4c1ee384be0de72a4bdd55ed87e0f8294e7df5eefcf6b4942db3d85a69e
 2021-08-05 15:27:19 +00:00
drh 324f91a591 Add NEVER() macros on recently introduced unreachable branches. 
FossilOrigin-Name: 806939eb5947f9187dc9c4814b26e9f94ec0186596c7be97981dbea7c2169c26
 2021-08-04 14:50:23 +00:00
drh 3edc927ecd Always prefer built-in SQL functions over app-defined SQL functions within 
sqlite3NestedParse().  Formerly this was the case for a few calls to
sqlite3NestedParse(), but not for all of them.

FossilOrigin-Name: 164662ef01ad45ca570c44631a1117cccce6e34b00dbba7f422c089e8ffaa932
 2021-08-04 13:42:12 +00:00
drh 7061aa8977 Fix the build for SQLITE_ENABLE_UPDATE_DELETE_LIMIT. 
FossilOrigin-Name: 5150d2da06ab3c7e3bea1865413cd21c64d5cefb91d3d874e9dd0bf51aea754b
 2021-08-03 23:23:23 +00:00
drh 76f2477531 Improved harmony with the reuse-schema branch. 
FossilOrigin-Name: cbc703f70d16de0e93b276528fc761290f30af770ceb4b4d11d6a6e6506ac67c
 2021-08-03 18:45:41 +00:00
drh cf9d36d1b3 Refactor field names in the Column object, zCnName and zCnColl, to make them 
unique and thus easier to find amid all the other code.

FossilOrigin-Name: 8b781dcaf68e0cf12a844708c82eee00193e340195cbca915d077e4846983bf3
 2021-08-02 18:03:43 +00:00
drh f38524d20d Refactor the Table object to reduce its memory footprint. 
FossilOrigin-Name: bbb6759bcf6e01d36dfc787a82a610d359f50aaeac8104b73883a84906d54e1f
 2021-08-02 16:41:57 +00:00
drh 79cf2b7120 Refactor the way that DEFAULT expressions are stored on columns, in order 
to save memory in the common case where the column has no DEFAULT clause.

FossilOrigin-Name: 8646547e54211d44c415663c33775c4268550f8332949c4731a4bb6ec9cc663a
 2021-07-31 20:30:41 +00:00
drh c2df4d6adb Recognize certain standard datatypes ("INT", "INTEGER", "REAL", "TEXT", and 
"BLOB") and if a column has one of those datatypes, store the type part of
the bit-field information in the Column structure to save space.

FossilOrigin-Name: d2da62a9df63036b02dadca3798de9e623c2680b3ef0c37d2b18bb88693afd7f
 2021-07-30 23:30:30 +00:00
drh e48f261ebf If a generated column uses the optional keywords GENERATE ALWAYS, try to avoid 
putting those keywords in the typename of the column.
[forum:/forumpost/ff3ffe09251c105b|Forum post ff3ffe09251c105b]

FossilOrigin-Name: 3c954863f45271a3518acf51fd685a641878811fb5cfcbdbad85154aeccdc902
 2021-07-30 20:09:08 +00:00
drh 77441faff5 Avoid clownfeet in the names columns when the column names are quoted 
in the original CREATE TABLE statement.

FossilOrigin-Name: 980f7292afd45a8e73272e2139b55b99ab86167febec9fd0bf0356e8167b2ee9
 2021-07-30 18:39:59 +00:00
drh 7b3c514b53 Reduce clownfooting in the allocation of the Table.aCol array. This reduces 
the amount of heap space required to hold large schemas by about 11%.

FossilOrigin-Name: 2941ded0acbdcf914567bf7451cfd9b770269545c20d3fa7107c40492689afad
 2021-07-30 12:47:35 +00:00
drh f873392dde Enhance the wal.c source file with an ASCII-art schematic of the -shm file 
header.

FossilOrigin-Name: a6c160e08a61d105f8aab959440ac5ec4f1aaca8f0d393e08e7c2c67815b5bb2
 2021-07-29 18:34:35 +00:00
drh 5025cb581f Complete warning-free build on old PPC iBook. 
FossilOrigin-Name: ef2a0850394b1c6c1fc84b26694a3712ae1e50d52bb78fea2ec40148a7d833de
 2021-07-29 17:23:23 +00:00
drh 944d85dfe2 Fix an error in one of the assert() statements added by [23b08fe9db24a953]. 
FossilOrigin-Name: ad24334bc06dc9ae52825a1873a1eab6c258d77fcc00dec55884ddddecd9932e
 2021-07-29 17:01:44 +00:00
drh fd4c7862ee Improve comments and add new assert() statements in WAL to help document 
how everything works.

FossilOrigin-Name: 23b08fe9db24a953cc231b093cf74d140c9965d22964d0401ff8ab3d4ecba443
 2021-07-29 16:48:21 +00:00
drh 02a9996e40 Remove ALWAYS() macros that can be true if the internal test function 
implies_nonnull_row() is used in the result set of a query and contains
comparison operator against a computed column.
dbsqlfuzz 4c34db5bff6247f33ee49e341a1f3018e72be0a0.

FossilOrigin-Name: 4d1dbfa35c7dc0f09321b2e274a00e506f4ca65322454652d5891d815a6966d3
 2021-07-29 00:33:20 +00:00
dan 779e990629 Add test case to ensure that sessions works with DELETE statements that use the truncate optimization (i.e. a DELETE without a WHERE clause). 
FossilOrigin-Name: a2fc531177c3a061f2881198bb711d502db7cd831351b6a5dd415936845b6625
 2021-07-28 18:13:28 +00:00
drh c6da6dba69 Fix a harmless uninitialized variable read that occurs after an error 
associated with a subquery that uses DISTINCT.  Found by a fuzzer.

FossilOrigin-Name: e9719f975f61c4c9f40ea077b049eed97d0957b925a4b6149d9ee21ce827b6a1
 2021-07-28 02:04:58 +00:00
drh 9045e7d696 Reduce the scope of a variable in order to fix a harmless compiler warning 
that occurs under -DSQLITE_OMIT_AUTOMATIC_INDEX.

FossilOrigin-Name: 36d5dbbe13562f4ea6435e620d102f8515bd0e6b8e66fd1841062a4e4621e330
 2021-07-28 01:22:23 +00:00
drh 3740712677 Enhance the CLI with the ".connection" command that can switch between 
up to five different database connections.  Used for manual testing of multiple
database connections in the same process.

FossilOrigin-Name: 54eaf076c05887157179459ab39c2556953f6fef9c1b14f17a8aa74087da3023
 2021-07-23 18:43:58 +00:00
drh c0495e8c9c Set the checkSchema flag if a CREATE TABLE parse fails because the table 
already exists, to ensure that the table was not previously deleted by
some other connection.

FossilOrigin-Name: 91bcb9621529b58d28e91a2763eb9eef3951400d5eaef105073258f3dd331872
 2021-07-22 21:11:06 +00:00
drh 55b8b73e74 Fix ALTER TABLE DROP COLUMN so that it generates valid bytecode even when 
operating on a corrupt database and using PRAGMA writable_schema=ON.
dbsqlfuzz 5f09e7bcc78b4954d06bf9f2400d7715f48d1fef

FossilOrigin-Name: b65f4f763979ee9e0b943c787609ea22d6f7e01d41dfc1e084ec50a085a3550c
 2021-07-22 18:22:51 +00:00
drh 348e002ec9 One of the optimizations of check-in [de9c86c9e4cdb34f] does not work for 
terms originating in the ON/USING clause, as demonstrated by
[forum:/forumpost/6cf3bb457c3f4685|forum post 6cf3bb457c3f4685].  This
check-in disables that optimization for ON/USING terms.  Also improve the
TreeView display for the resulting "true"/"false" nodes to show that they
originate from the ON/USING clause.  Add a testcase() to the other optimization
to show that it can still be used for ON/USING terms.

FossilOrigin-Name: 1f6796044008e6f3a61bcf390c0c7eb31947e971f0edada74e7a3a211f8ae76a
 2021-07-22 16:07:01 +00:00
drh c8d214711f Improved robustness of cursor renumbering in the UNION ALL flattener 
when operating on vector assignments of an UPDATE FROM.
dbsqlfuzz 417d2b053b9b3c9edaf22dd515564f06999e029c

FossilOrigin-Name: 60695359dc5d3bcba68a68e1842c40f4a01650eb5af408e02fb856fd8245e16d
 2021-07-21 15:42:05 +00:00
drh 74e5a5a703 Run a "PRAGMA quick_check", if necessary, on the modified table after 
an ALTER TABLE ADD COLUMN to verify that added NOT NULL or CHECK constraints
are satisfied by existing rows.  Abort the ADD COLUMN if not.
[forum:/forumpost/c04814903d6ec4f7|Forum post c04814903d6ec4f7].

FossilOrigin-Name: e3794997c34f03db2a4ac0ca5b76727d0e031778d92b08eaaf9631689ec3e56d
 2021-07-20 16:07:15 +00:00
dan d59f983501 Avoid a malfunction that could occur if the same correlated column reference appears in both the GROUP BY and the HAVING clause of a sub-select. dbsqlfuzz a779227f721a834df95f4f42d0c31550a1f8b8a2. 
FossilOrigin-Name: 1e35cc6d5c2f563c6bb163bb150d7bc6ede4c993efa828af1face3261bf65a2c
 2021-07-20 14:57:49 +00:00
drh 0f91a5352b Fix issues in the new ADD COLUMN constraint checking. Add preliminary 
test cases.

FossilOrigin-Name: 48434ad3fa9504c063d812d119bc8f622548fd02b3d478ff247b11474c4ce5db
 2021-07-20 08:23:54 +00:00
drh b4d9b2b537 Demonstration code to show how NOT NULL and CHECK constraints can be 
verified after an ALTER TABLE ADD COLUMN.

FossilOrigin-Name: 039f540373b03af9e0c87499e5e0423eb093d1d343829282a5ac1de2d600b881
 2021-07-20 07:35:07 +00:00
drh 53fa02507b It does not work to deserialized into TEMP, so do not allow it. The 
sqlite3_deserialize() routine now returns SQLITE_ERROR if you try.

FossilOrigin-Name: 18068cc60698d4944a9d682cdf34b14b4d4b32f043f8d584dbf41c2bb5ac6220
 2021-07-20 02:02:24 +00:00
drh de3246176b More precision in comparing integers and floating point values while 
processing the integer primary key for OP_SeekGE and similar.
[forum:/forumpost/2bdb86a068|Forum post 2bdb86a068].

FossilOrigin-Name: f9c6426de3b413ff8fcf04a00931ca5f123f996c572b35181af114afa8d811d7
 2021-07-19 20:52:31 +00:00
dan 73983658c9 In defensive mode, allow statements that write to shadow tables to be prepared from with virtual-table xSync() calls. 
FossilOrigin-Name: c8601d83fbecf84ca7991d339449b380deb5a7620dc84756a91c2880f030b423
 2021-07-19 14:00:29 +00:00
drh ef8344c6a5 Try to omit the ORDER BY clause in subqueries if doing so does not change 
the result in any way. See
[forum:/forumpost/2d76f2bcf65d256a|Forum post 2d76f2bcf65d256a] for
details and history.

FossilOrigin-Name: 85ddaf1b59a19cbd9efe7724a163b30c14bafabfaf2cfced07b463e76f73e494
 2021-07-16 22:43:00 +00:00
drh ee612e2a5d Minor comment improvements. 
FossilOrigin-Name: 6854b5919beefa43da21ba739e82d583183c8cdfe5dd63e27a810ac1ffe2330b
 2021-07-16 20:16:19 +00:00
larrybr d51a2d8b8f De-typo sqlite3_expanded_sql() doc 
FossilOrigin-Name: 56b0f5418dad34d1e83d53741916e2a38a5448369031d959b8a44867774be657
 2021-07-16 17:11:21 +00:00
drh 0fb78f0cca Get the "omit ORDER BY in FROM-clause subqueries" optimization working for the 
core test cases.

FossilOrigin-Name: e31c5888659ffd4c6d8b68627123df3bbb84bb010b7766b0a74877bf3ba1e52b
 2021-07-16 01:19:19 +00:00
drh bb30123178 Attempt to omit ORDER BY clauses from FROM-clause subqueries if those ORDER BY 
clauses do not affect the output.  See
[forum:/forumpost/2d76f2bcf65d256a|forum thread 2d76f2bcf65d256a] for
discussion.  This can help the query flattener in
some cases, resulting in faster query plans.  The current implemention does
not always work.

FossilOrigin-Name: ef97c3e7c3ea2cf1a4db6591328fe7ce3f1d189afc2d578159135824ec89e620
 2021-07-15 19:29:43 +00:00