-C Change\sthe\s0x20000\sbit\s(use\sanalysis\slimit)\sto\s0x10,\smeaning\sthat\sthis\sfeature\nis\son\sby\sdefault.\s\sThe\sdefault\sanalysis\slimit\sis\schanged\sto\s2000\swhich\sis\nalmost\salways\ssufficient\sfor\saccurate\sanalysis\sresults.
-D 2024-02-19T13:06:27.586
+C Simplifications\sto\sPRAGMA\soptimize\sto\smake\sit\seasier\sto\suse.\s\sIt\salways\ntries\sto\sANALYZE\sunanalyzed\sindexes.\s\sThe\s0x10000\sflag\sjust\smakes\sit\scheck\nfor\ssize\schanges\sin\sall\stables.
+D 2024-02-19T13:50:09.987
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
F src/pcache.c 040b165f30622a21b7a9a77c6f2e4877a32fb7f22d4c7f0d2a6fa6833a156a75
F src/pcache.h 1497ce1b823cf00094bb0cf3bac37b345937e6f910890c626b16512316d3abf5
F src/pcache1.c 602acb23c471bb8d557a6f0083cc2be641d6cafcafa19e481eba7ef4c9ca0f00
-F src/pragma.c b877efa88ea41560ee5dd95daa30c8cadb743381c59b8921a5143bf0792c6e3b
+F src/pragma.c 9197331dd283a6010bb4e2c129a9015f854203d27fa6fbe89e1aea742b78351c
F src/pragma.h e690a356c18e98414d2e870ea791c1be1545a714ba623719deb63f7f226d8bb7
F src/prepare.c 371f6115cb69286ebc12c6f2d7511279c2e47d9f54f475d46a554d687a3b312c
F src/printf.c 18fbdf028345c8fbe6044f5f5bfda5a10d48d6287afef088cc21b0ca57985640
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P d13b79eae6df7f9d1f3b8062ddc75a12ff038196b3d752d2672a9925fa45ca56
-R e258fa6228ef566d2b5670b2822a20d1
+P 4abd47b5917099a2f74e53e12c987da0722304a5e9a93b6d43015c1f45c48444
+R 39db09ba2f5384fee677814cc2cbe4fe
U drh
-Z e864b92d6fb5e0c6f09ca55fa83dd960
+Z cf23276671f3baaf4e4f3579488af586
# Remove this line to create a well-formed Fossil manifest.
** currently (2024-02-19) set to 2000, which is such that
** the worst case run-time for PRAGMA optimize on a 100MB
** database will usually be less than 100 milliseconds on
- ** a RaspberryPI-4 class machine. Off by default.
+ ** a RaspberryPI-4 class machine. On by default.
+ **
+ ** 0x00020 Run ANALYZE on any table that has a complete index
+ ** (an index without a WHERE clause) that lacks an entry
+ ** in the sqlite_stat1 table. On by default.
**
** 0x10000 Look at tables to see if they need to be reanalyzed
- ** even if they have not been queried during the current
- ** connection. Off by default.
+ ** due to growth or shrinkage even if they have not been
+ ** queried during the current connection. Off by default.
**
** The default MASK is and always shall be 0x0fffe. In the current
** implementation, the default mask only covers the 0x00002 optimization,
**
** (1) MASK bit 0x00002 is set.
**
- ** (2) Either the 0x10000 MASK bit is set or else the query planner used
- ** sqlite_stat1-style statistics for one or more indexes of the table
- ** at some point during the lifetime of the current connection.
+ ** (2) The table is an ordinary table, not a virtual table or view.
**
- ** (3) One or more indexes of the table are currently unanalyzed OR
- ** the number of rows in the table has increased or decreased by
- ** 10-fold (the new size is either greater than 10 times the old
- ** size or less than 1/10th of the old size).
+ ** (3) The table name does not begin with "sqlite_".
**
- ** (4) The table is an ordinary table, not a virtual table or view.
+ ** (4) One or more of the following is true:
+ ** (4a) The 0x10000 MASK bit is set.
+ ** (4b) One or more complete indexes on the table lacks an entry
+ ** in the sqlite_stat1 table.
+ ** (4c) The query planner used sqlite_stat1-style statistics for one
+ ** or more indexes of the tableat some point during the lifetime
+ ** of the current connection.
**
- ** (5) The table name does not begin with "sqlite_".
+ ** (5) One or more of the following is true:
+ ** (5a) One or mroe complete indexes on the table lacks an entry
+ ** in the sqlite_stat1 table. (Same as 4a)
+ ** (5b) The number of rows in the table has increased or decreased by
+ ** 10-fold. In other words, the current size of the table is
+ ** 10 times larger than the size in sqlite_stat1 or else the
+ ** current size is less than 1/10th the size in sqlite_stat1.
**
** The rules for when tables are analyzed are likely to change in
** future releases. Future versions of SQLite might accept a string
char *zSubSql; /* SQL statement for the OP_SqlExec opcode */
u32 opMask; /* Mask of operations to perform */
int nLimit; /* Analysis limit to use */
- int once = 0; /* One-time initialization done */
+ int nCheck = 0; /* Number of tables to be optimized */
if( zRight ){
opMask = (u32)sqlite3Atoi(zRight);
/* Do not scan system tables */
if( 0==sqlite3StrNICmp(pTab->zName, "sqlite_", 7) ) continue;
+ /* Find the size of the table as last recorded in sqlite_stat1.
+ ** If any complete index (index without a WHERE clause) is unanalyzed,
+ ** then the threshold is -1 to indicate a new, unanalyzed index
+ */
+ szThreshold = pTab->nRowLogEst;
+ for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
+ if( !pIdx->hasStat1 && pIdx->pPartIdxWhere==0 ){
+ szThreshold = -1; /* Always analyze if any index lacks statistics */
+ break;
+ }
+ }
+
/* If table pTab has not been used in a way that would benefit from
** having analysis statistics during the current session, then skip it,
** unless the 0x10000 MASK bit is set. */
- if( (pTab->tabFlags & TF_MaybeReanalyze)==0
- && (opMask & 0x10000)==0
- ){
+ if( (pTab->tabFlags & TF_MaybeReanalyze)!=0 ){
+ /* Check for size change if stat1 has been used for a query */
+ }else if( opMask & 0x10000 ){
+ /* Check for size change if 0x10000 is set */
+ }else if( pTab->pIndex!=0 && szThreshold<0 ){
+ /* Do analysis if unanalyzed complete indexes exists */
+ }else{
+ /* Otherwise, we can skip this table */
continue;
}
- /* Hold a write transaction open for efficiency */
- if( !once || 1 ){
+ nCheck++;
+ if( nCheck==2 ){
+ /* If ANALYZE might be invoked two or more times, hold a write
+ ** transaction for efficiency */
sqlite3BeginWriteOperation(pParse, 0, iDb);
- once = 1;
}
/* Reanalyze if the table is 10 times larger or smaller than
- ** the last analysis */
- szThreshold = pTab->nRowLogEst;
- for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
- if( !pIdx->hasStat1 ){
- szThreshold = -1; /* Always analyze if any index lacks statistics */
- break;
- }
- }
+ ** the last analysis. Unconditional reanalysis if there are
+ ** unanalyzed complete indexes. */
if( szThreshold>=0 ){
LogEst iRange = 33; /* 10x size change */
sqlite3OpenTable(pParse, iTabCur, iDb, pTab, OP_OpenRead);
projects / thirdparty / sqlite.git / commitdiff
