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Overview
Comment: | Fix a problem reading from temp databases in SQLITE_DIRECT_OVERFLOW_READ builds. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
81629ba91475938b6ad528e7b1dbef4a |
User & Date: | dan 2018-11-22 19:10:14.702 |
References
2018-11-27
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14:41 | Remove the sqlite3PagerUseWal() routine which was made obsolete by the [81629ba91475938b6ad] change. (check-in: 4331b4990c user: drh tags: trunk) | |
Context
2018-11-24
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16:07 | Remove the unused mmapSizeActual field from the Windows sqlite3_file implementation. (check-in: 0e7aa62227 user: drh tags: trunk) | |
2018-11-22
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19:10 | Fix a problem reading from temp databases in SQLITE_DIRECT_OVERFLOW_READ builds. (check-in: 81629ba914 user: dan tags: trunk) | |
2018-11-21
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14:27 | Improvements to the ossfuzz.c fuzz-testing module so that it works with -DSQLITE_OMIT_PROGRESS_CALLBACK and with -DSQLITE_OMIT_INIT. (check-in: d343f7d6b0 user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
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4754 4755 4756 4757 4758 4759 4760 | rc = getOverflowPage(pBt, nextPage, 0, &nextPage); } offset -= ovflSize; }else{ /* Need to read this page properly. It contains some of the ** range of data that is being read (eOp==0) or written (eOp!=0). */ | < < < | < < | > | 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 | rc = getOverflowPage(pBt, nextPage, 0, &nextPage); } offset -= ovflSize; }else{ /* Need to read this page properly. It contains some of the ** range of data that is being read (eOp==0) or written (eOp!=0). */ int a = amt; if( a + offset > ovflSize ){ a = ovflSize - offset; } #ifdef SQLITE_DIRECT_OVERFLOW_READ /* If all the following are true: ** ** 1) this is a read operation, and ** 2) data is required from the start of this overflow page, and ** 3) there are no dirty pages in the page-cache ** 4) the database is file-backed, and ** 5) the page is not in the WAL file ** 6) at least 4 bytes have already been read into the output buffer ** ** then data can be read directly from the database file into the ** output buffer, bypassing the page-cache altogether. This speeds ** up loading large records that span many overflow pages. */ if( eOp==0 /* (1) */ && offset==0 /* (2) */ && sqlite3PagerDirectReadOk(pBt->pPager, nextPage) /* (3,4,5) */ && &pBuf[-4]>=pBufStart /* (6) */ ){ sqlite3_file *fd = sqlite3PagerFile(pBt->pPager); u8 aSave[4]; u8 *aWrite = &pBuf[-4]; assert( aWrite>=pBufStart ); /* due to (6) */ memcpy(aSave, aWrite, 4); rc = sqlite3OsRead(fd, aWrite, a+4, (i64)pBt->pageSize*(nextPage-1)); nextPage = get4byte(aWrite); memcpy(aWrite, aSave, 4); |
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Changes to src/pager.c.
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820 821 822 823 824 825 826 827 828 829 830 831 832 833 | ** if( isOpen(pPager->jfd) ){ ... ** ** instead of ** ** if( pPager->jfd->pMethods ){ ... */ #define isOpen(pFd) ((pFd)->pMethods!=0) /* ** Return true if this pager uses a write-ahead log to read page pgno. ** Return false if the pager reads pgno directly from the database. */ #if !defined(SQLITE_OMIT_WAL) && defined(SQLITE_DIRECT_OVERFLOW_READ) int sqlite3PagerUseWal(Pager *pPager, Pgno pgno){ | > > > > > > > > > > > > > > > > > > > > > > > > | 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 | ** if( isOpen(pPager->jfd) ){ ... ** ** instead of ** ** if( pPager->jfd->pMethods ){ ... */ #define isOpen(pFd) ((pFd)->pMethods!=0) #ifdef SQLITE_DIRECT_OVERFLOW_READ /* ** Return true if page pgno can be read directly from the database file ** by the b-tree layer. This is the case if: ** ** * the database file is open, ** * there are no dirty pages in the cache, and ** * the desired page is not currently in the wal file. */ int sqlite3PagerDirectReadOk(Pager *pPager, Pgno pgno){ if( pPager->fd->pMethods==0 ) return 0; if( sqlite3PCacheIsDirty(pPager->pPCache) ) return 0; #ifndef SQLITE_OMIT_WAL if( pPager->pWal ){ u32 iRead = 0; int rc; rc = sqlite3WalFindFrame(pPager->pWal, pgno, &iRead); return (rc==SQLITE_OK && iRead==0); } #endif return 1; } #endif /* ** Return true if this pager uses a write-ahead log to read page pgno. ** Return false if the pager reads pgno directly from the database. */ #if !defined(SQLITE_OMIT_WAL) && defined(SQLITE_DIRECT_OVERFLOW_READ) int sqlite3PagerUseWal(Pager *pPager, Pgno pgno){ |
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Changes to src/pager.h.
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188 189 190 191 192 193 194 195 196 197 198 199 200 201 | int sqlite3PagerSnapshotRecover(Pager *pPager); int sqlite3PagerSnapshotCheck(Pager *pPager, sqlite3_snapshot *pSnapshot); void sqlite3PagerSnapshotUnlock(Pager *pPager); # endif #else # define sqlite3PagerUseWal(x,y) 0 #endif #ifdef SQLITE_ENABLE_ZIPVFS int sqlite3PagerWalFramesize(Pager *pPager); #endif /* Functions used to query pager state and configuration. */ u8 sqlite3PagerIsreadonly(Pager*); | > > > > | 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | int sqlite3PagerSnapshotRecover(Pager *pPager); int sqlite3PagerSnapshotCheck(Pager *pPager, sqlite3_snapshot *pSnapshot); void sqlite3PagerSnapshotUnlock(Pager *pPager); # endif #else # define sqlite3PagerUseWal(x,y) 0 #endif #ifdef SQLITE_DIRECT_OVERFLOW_READ int sqlite3PagerDirectReadOk(Pager *pPager, Pgno pgno); #endif #ifdef SQLITE_ENABLE_ZIPVFS int sqlite3PagerWalFramesize(Pager *pPager); #endif /* Functions used to query pager state and configuration. */ u8 sqlite3PagerIsreadonly(Pager*); |
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Changes to src/pcache.c.
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851 852 853 854 855 856 857 858 859 860 861 862 863 864 | int sqlite3PCachePercentDirty(PCache *pCache){ PgHdr *pDirty; int nDirty = 0; int nCache = numberOfCachePages(pCache); for(pDirty=pCache->pDirty; pDirty; pDirty=pDirty->pDirtyNext) nDirty++; return nCache ? (int)(((i64)nDirty * 100) / nCache) : 0; } #if defined(SQLITE_CHECK_PAGES) || defined(SQLITE_DEBUG) /* ** For all dirty pages currently in the cache, invoke the specified ** callback. This is only used if the SQLITE_CHECK_PAGES macro is ** defined. */ | > > > > > > > > > | 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 | int sqlite3PCachePercentDirty(PCache *pCache){ PgHdr *pDirty; int nDirty = 0; int nCache = numberOfCachePages(pCache); for(pDirty=pCache->pDirty; pDirty; pDirty=pDirty->pDirtyNext) nDirty++; return nCache ? (int)(((i64)nDirty * 100) / nCache) : 0; } #ifdef SQLITE_DIRECT_OVERFLOW_READ /* ** Return true if there are one or more dirty pages in the cache. Else false. */ int sqlite3PCacheIsDirty(PCache *pCache){ return (pCache->pDirty!=0); } #endif #if defined(SQLITE_CHECK_PAGES) || defined(SQLITE_DEBUG) /* ** For all dirty pages currently in the cache, invoke the specified ** callback. This is only used if the SQLITE_CHECK_PAGES macro is ** defined. */ |
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Changes to src/pcache.h.
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178 179 180 181 182 183 184 185 186 | /* Return the header size */ int sqlite3HeaderSizePcache(void); int sqlite3HeaderSizePcache1(void); /* Number of dirty pages as a percentage of the configured cache size */ int sqlite3PCachePercentDirty(PCache*); #endif /* _PCACHE_H_ */ | > > > > | 178 179 180 181 182 183 184 185 186 187 188 189 190 | /* Return the header size */ int sqlite3HeaderSizePcache(void); int sqlite3HeaderSizePcache1(void); /* Number of dirty pages as a percentage of the configured cache size */ int sqlite3PCachePercentDirty(PCache*); #ifdef SQLITE_DIRECT_OVERFLOW_READ int sqlite3PCacheIsDirty(PCache *pCache); #endif #endif /* _PCACHE_H_ */ |
Changes to test/tempdb2.test.
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72 73 74 75 76 77 78 79 | ROLLBACK; } do_execsql_test 1.4 { SELECT b=int2str(2) FROM t1 } {1 1 1} finish_test | > > > > > > > > > > > > > > > > > > > > > | 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | ROLLBACK; } do_execsql_test 1.4 { SELECT b=int2str(2) FROM t1 } {1 1 1} #------------------------------------------------------------------------- db close sqlite3 db "" db func int2str int2str do_execsql_test 2.0 { PRAGMA cache_size = -100; CREATE TABLE t1(a INTEGER PRIMARY KEY, b); WITH c(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100 ) INSERT INTO t1 SELECT x, int2str(x) FROM c; } do_execsql_test 2.1 { INSERT INTO t1 VALUES(10001, int2str(1001) || int2str(1001) || int2str(1001)); } do_execsql_test 2.2 { SELECT b FROM t1 WHERE a = 10001; } "[int2str 1001][int2str 1001][int2str 1001]" finish_test |