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1306 Commits

Author SHA1 Message Date
drh
7f9c5dbfe9 Build internal data structures appropriately for WITHOUT ROWID tables. 
FossilOrigin-Name: 35a3606071685aa5196951f4bdddb136589ea216
 2013-10-23 00:32:58 +00:00
drh
bbbdc83b52 The Index object now has nKeyCol and nColumn. nColumn is the total number 
of columns and nKeyCol is the number of key columns.  Currently these always
differ by one.  Refactor aiColumn[] to be of type i16 instead of int.

FossilOrigin-Name: a106ce86cd4afd1f81603826de77df1fb25e9ab5
 2013-10-22 18:01:40 +00:00
drh
77e57dfbc8 Add a procedure to handle the messy details of allocating an Index object 
from the heap.

FossilOrigin-Name: 45efc94f9a8169433ffcb4aa35760551c55df4c4
 2013-10-22 14:28:02 +00:00
drh
5969da4a2c Simplification of the syntax: Merely append "WITHOUT rowid" to the end of 
the table definition.

FossilOrigin-Name: 131cc6e152abe1a2d48e6d8d40d2c2f8dbe723e7
 2013-10-21 02:14:45 +00:00
drh
81eba73ebf Experimental changes toward "index only" tables. Add the ability to specify 
options on CREATE TABLE statements using the WITH clause modeled after
PostgreSQL and SQL Server.  Only the "omit_rowid" option is currently
recognized and that option is currently a no-op.

FossilOrigin-Name: 0248ec5e6e3797575388f046d8c27f7445fe2a39
 2013-10-19 23:31:56 +00:00
dan
67896cef89 Fix for building with SQLITE_OMIT_FOREIGN_KEY. 
FossilOrigin-Name: b8b5f6c8f646989bc62bb59416de9bca003a5896
 2013-10-14 15:41:39 +00:00
drh
80e0b72e8d Make sure the sqlite3.h file occurs at the very top of the sqlite3.c 
amalgamation.

FossilOrigin-Name: 03593817ab5abdd4bbaa5e47e2e4745eef025af9
 2013-10-11 13:27:26 +00:00
drh
e13e9f54b0 Completely remove the iScanRatio field. The PRAGMA index_list(TABLE) command 
shows the estimated row size in the forth column.  It also generates a row
for the table with an index name of NULL.  The query planner still does not
take row size estimates into account - that is the next step.

FossilOrigin-Name: 8b4aa0c7a2122bbe60432edadf27e490e31ec987
 2013-10-05 19:18:00 +00:00
drh
bf539c4d5c Begin an experimental refactoring to estimate the average number of bytes 
in table and index rows and to use that information in query planner.
Begin by renaming WhereCost to LogEst and making that type and its
conversion routines available outside of where.c.

FossilOrigin-Name: 66c4a251d61582b47d5cbe50cbca160a9209bd06
 2013-10-05 18:16:02 +00:00
drh
fdaac671b8 Improved estimates of the relative speed of index scans based on declared 
datatypes of columns in the table.  Add "r" column to PRAGMA index_info,
showing the estimated relative scan rate.

FossilOrigin-Name: 07462bb6059f023c22a6c84a4a02afbd84e69255
 2013-10-04 15:30:21 +00:00
drh
c28c4e5009 Experimental branch allowing different postulated scan rates for each index. 
FossilOrigin-Name: d59d97b0a8d70dc31d45db61bbc11ebb5375a224
 2013-10-03 19:21:41 +00:00
drh
d100f6912d The sqlite3FixInit() routine cannot fail. So change the return type from "int" 
to "void".

FossilOrigin-Name: 500c5932fe3f5fcd0940522f7839d581c555e0eb
 2013-10-03 15:39:44 +00:00
dan
46539d7cfa Return an error if an attempt is made to create a trigger with an SQL variable embedded within it. If such a variable reference is found within a trigger definition loaded from the sqlite_master table, silently replace it with a NULL. 
FossilOrigin-Name: f35f6ae3da77dbdf5f7a4a9927475659fc6e0ca6
 2013-10-03 12:29:38 +00:00
drh
95a7b3e36d The date and time functions use the exact same notion of "now" for every 
invocation within the same call to sqlite3_step().

FossilOrigin-Name: daf6ba413cb3cb6065774ba07495eab4a28b49b0
 2013-09-16 12:57:19 +00:00
drh
ebb6a65d16 Refactor the ExprSetIrreducible() macro into ExprSetVVAProperty(*,EP_NoReduce). 
This is a naming change only.  The logic is the same.

FossilOrigin-Name: 695aee46e9bdf15159ab52db7f522b30c91aed0f
 2013-09-12 23:42:22 +00:00
drh
a4c3c87e3d Merge in the Expr.flags expansion to 32-bits. Use an extra bit to help 
optimize the sqlite3ExprSkipCollate() routine.

FossilOrigin-Name: 4c84d1b4c20f18921dd705bf67e8225975b83e86
 2013-09-12 17:29:25 +00:00
drh
c5cd124900 Increase the number of bits available in Expr.flags. Other tweaks aimed at 
making expression processing more robust.

FossilOrigin-Name: 579a512538528cf4bb4381ba393c5d9e7310086b
 2013-09-12 16:50:49 +00:00
drh
4a1f4ff53b Remove two obsolete fields from the sqlite3 object. 
FossilOrigin-Name: 117fa5fbc9bed1a7b982c8ddc21b7e228905ccb4
 2013-09-12 01:33:53 +00:00
drh
add5ce303f Continuing refinements of the logic to take WHERE clause terms not used for 
indexing into account when computing the number of output rows from each
table.

FossilOrigin-Name: b65dc53415f42d8402d0ec7f4bedf59d7b39b486
 2013-09-07 00:29:06 +00:00
drh
cca9f3d291 Initial implementation of the unlikely() SQL function used as a hint to 
the query planner.

FossilOrigin-Name: 036fc37a034093a4c6fc190633bd41c2b7230d77
 2013-09-06 15:23:29 +00:00
drh
d36e104112 Combine the FuncDef.iPrefEnc and FuncDef.flags fields into a single 
new FuncDef.funcFlags field.

FossilOrigin-Name: 97b10e66e98e84755aa577f8da017bf1aea2056c
 2013-09-06 13:10:12 +00:00
dan
8ff2d9561a When preparing an UPDATE statement, avoid generating VDBE code for those foreign key related actions and constraint checks that may be seen to be unnecessary by considering the subset of table columns potentially modified by the UPDATE. 
FossilOrigin-Name: e940b5de49baa1d6a4cf859fbbc0e0df86ac5dbf
 2013-09-05 18:40:29 +00:00
drh
1435a9a126 Adjust ANALYZE for improved test coverage. Use the SQLITE_ENABLE_STAT3_OR_STAT4 
macro (created in sqliteInt.h) to conditionally include code, instead of 
a boolean specifying both macros separately.

FossilOrigin-Name: 67a9a392edd62ef5a5a1ad3010b20a39b285793d
 2013-08-27 23:15:44 +00:00
drh
9fecc546cb Reduce the amount of code run and memory used for ANALYZE in the common case 
where neither STAT3 and STAT4 are enabled.

FossilOrigin-Name: 9d1424c91a21ed740aca53e437b8f7c1f0823c03
 2013-08-27 20:16:48 +00:00
drh
2f53b90665 Merge the STAT4 capability into trunk. 
FossilOrigin-Name: a32af0abe5fa6d570604fa3534e8230d5b6042fc
 2013-08-26 23:18:06 +00:00
drh
b49bc86a1a Simplification to the StrAccum object and the sqlite3StrAccumAppend() 
method that also results in slightly better performance.

FossilOrigin-Name: 700dbbea8647e0fdaee6d0aba3d3dd8ebfbac04a
 2013-08-21 21:12:10 +00:00
dan
016f7811f2 If a virtual table xSync() returns an error message, copy it into a buffer allocated by sqlite3DbMalloc() before transfering it to Vdbe.zErrMsg. 
FossilOrigin-Name: 854ba3049005adf033e07e6740a36e63f2a56758
 2013-08-21 17:35:48 +00:00
drh
40c3941cfa Add the cache_spill pragma. 
FossilOrigin-Name: cdb181c04fa99c6c29f23eb68ccb5475e7f6bf9c
 2013-08-16 20:42:20 +00:00
drh
d94f512f58 Merge recent trunk changes into the STAT4 branch. 
FossilOrigin-Name: c69b512af276a438399747af22659415af3a5d4d
 2013-08-16 12:26:33 +00:00
drh
e35463b312 Bare identifiers in ORDER BY clauses bind more tightly to output column name, 
but identifiers in expressions bind more tightly to input column names.
This is a compromise between SQL92 and SQL99 behavior and is what
PostgreSQL and MS-SQL do.  Ticket [f617ea3125e9c].

FossilOrigin-Name: c78b357c00a35ed48ce2ffbc041de8d22570d1e2
 2013-08-15 20:24:27 +00:00
drh
26080d9241 Clarification and typo fixes in comments related to name resolution. 
No changes to code.

FossilOrigin-Name: f30abdf9d814d6c75bf1c803054737c737ad636f
 2013-08-15 14:27:42 +00:00
dan
8ad169abb4 If ENABLE_STAT3 is defined but ENABLE_STAT4 is not, have ANALYZE create and populate the sqlite_stat3 table instead of sqlite_stat4. 
FossilOrigin-Name: cca8bf4372ab7a0258aa5c9397818415c6cf0abf
 2013-08-12 20:14:04 +00:00
dan
0106e378f1 Re-enable reading from the sqlite_stat3 table (as well as sqlite_stat4). 
FossilOrigin-Name: 6d45078e621526fc2bac0eaefbb0f9602b9a8ec5
 2013-08-12 16:34:32 +00:00
dan
eea568d68e Replace variable Index.avgEq (average number of rows in keys for which there is no sample in sqlite_stat4) with vector Index.aAvgEq. 
FossilOrigin-Name: 7b70b419c43b2c3b2daf11d833a1d60245bfaef5
 2013-08-07 19:46:15 +00:00
dan
3d40759803 Merge latest trunk changes with this branch. 
FossilOrigin-Name: 08f74c45ecf711a2373af578d44470add9082377
 2013-08-07 18:42:27 +00:00
drh
4bfd4ad9a7 Remove the unused sqlite3Utf8to16() utility function. 
FossilOrigin-Name: 9159b43eb2cb5d6ed18a5ad168fa27134fec2553
 2013-08-07 15:57:24 +00:00
dan
87cd93215e When estimating the number of rows scanned using data from the sqlite_stat4 table, avoid allocating UnpackedRecord and KeyInfo structures until they are definitely required. 
FossilOrigin-Name: 353950a5269fa439cc3e57b62e16558a84ea2557
 2013-08-07 15:52:41 +00:00
dan
7a4192358a When possible, use the multi-column samples in sqlite_stat4 to estimate the number of index rows scanned by a query plan. 
FossilOrigin-Name: 2973f5ca736c4a6f13c653d54b6a29d7cae8d0ed
 2013-08-06 20:01:43 +00:00
drh
d58d3278cb Performance optimization: Avoid calling convertCompoundSelecctToSubquery() 
on queries that do not use the UNION, EXCEPT, or INTERSECT operators.

FossilOrigin-Name: c589b2fed7beabc2337d701094c22635914d9c23
 2013-08-05 22:05:02 +00:00
drh
323df7907e Factor all KeyInfo object allocations into a single function: 
sqlite3KeyInfoAlloc().  Always allocate enough space so that 
sqlite3VdbeRecordCompare() can avoid checking boundaries and hence
run faster.

FossilOrigin-Name: 7301bedd94c8610568349953b18ff3575203e1b2
 2013-08-05 19:11:29 +00:00
dan
f52bb8d385 Begin adding experimental sqlite_stat4 table. This commit is buggy. 
FossilOrigin-Name: 2beea303a1d609cd2ff252412c50b966b9e5e8f1
 2013-08-03 20:24:58 +00:00
drh
619a1305e7 Fill out an initial implementation of the sqlite3ExprImpliesExpr() function. 
FossilOrigin-Name: 8e07aa2ad5579aeb82174ce5bd432ddb9c058bc1
 2013-08-01 13:04:46 +00:00
drh
8a9789b6c1 Test cases and bug fixes for the partial index logic. 
FossilOrigin-Name: 6b73ae7c123801787c8994113cbeb87ee96ba653
 2013-08-01 03:36:59 +00:00
drh
b2b9d3d758 Add the logic to keep partial indices up to date through DML statements and 
when new partial indices are created.  This new logic is untested except to
verify that it does not interfere with full indices.

FossilOrigin-Name: fb9044d15ad4fd6ae4a38858c0c0e6fe9d4faa25
 2013-08-01 01:14:43 +00:00
drh
4bd5f73fa0 Add logic to the query planner to only use partial indices if the WHERE clause 
constrains the search to rows covered by the partial index.  This is just
infrastructure.  The key routine, sqlite3ExprImpliesExpr(), is currently a
no-op so that partial indices will never be used.

FossilOrigin-Name: 8ca3eac111e06a1854f878a74bffe8f20eb47f1b
 2013-07-31 23:22:39 +00:00
drh
3780be115a Resolve names in CREATE INDEX WHERE clauses and detect errors. Disallow 
expressions that contain variables, subqueries, or functions.
The expression is still not used for anything, however.
still unused.

FossilOrigin-Name: f2aa7842c8b9df24294f09e2bde27b3f08c455c7
 2013-07-31 19:05:22 +00:00
drh
1fe0537e51 Here begins an experimental branch for exploring the idea of a partial index. 
This check-in is able to parse a WHERE clause on a CREATE INDEX statement, but
does not actually do anythingn with that WHERE clause yet.

FossilOrigin-Name: 6794b2dcb48b3507caccfc7867fc185818cf8291
 2013-07-31 18:12:26 +00:00
drh
443dbcf5ae Comment and preprocessor macro cleanup. 
FossilOrigin-Name: c0809b5e32c2ca0600098447a573e718eaeb319f
 2013-07-29 15:54:06 +00:00
drh
b1eaa718fd Add the experimental "query_only" pragma. 
FossilOrigin-Name: 6557c407983b067449deb76bc4c5248de64e07dc
 2013-07-11 15:22:31 +00:00
drh
648e264342 Add the "defer_foreign_keys" pragma and the SQLITE_DBSTATUS_DEFERRED_FKS 
value for sqlite3_db_status().  This is a cherry-pick of a sequence of five
checkins in the sessions branch between [1d44e5d3c2] and [d39e65fe70].

FossilOrigin-Name: 527121ac3cdc96ac33ad975c227a6685a2f7e999
 2013-07-11 15:03:32 +00:00