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Changes In Branch coroutine-autoindex Excluding Merge-Ins
This is equivalent to a diff from a29e117d7e to 6d410442fb
2015-05-29
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14:47 | Add support for automatic indexes on FROM-clause subqueries that are implemented via co-routine. (check-in: 020b8b106f user: drh tags: trunk) | |
14:36 | Add some extra source-code comments and a test case. (Closed-Leaf check-in: 6d410442fb user: drh tags: coroutine-autoindex) | |
13:55 | An attempt to allow automatic index creation on subqueries accessed via co-routine. (check-in: 521345add6 user: drh tags: coroutine-autoindex) | |
01:35 | Using "SELECT ALL" instead of just "SELECT" on a query that uses a single unflattenable subquery or view in its FROM clause will force the subquery to be manifested into a temporary table rather than run incrementally using a co-routine. This is a stop-gap means of controlling the decision to manifest while we try to work out a better to make that decision automatically. (check-in: a29e117d7e user: drh tags: trunk) | |
2015-05-28
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15:14 | Added comments and testcase() macros to error cases in the btree search. (check-in: 7da7dc714b user: drh tags: trunk) | |
Changes to src/where.c.
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1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 | 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 | + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + | /* ** Estimate the logarithm of the input value to base 2. */ static LogEst estLog(LogEst N){ return N<=10 ? 0 : sqlite3LogEst(N) - 33; } /* ** Convert OP_Column opcodes to OP_Copy in previously generated code. ** ** This routine runs over generated VDBE code and translates OP_Column ** opcodes into OP_Copy, and OP_Rowid into OP_Null, when the table is being ** accessed via co-routine instead of via table lookup. */ static void translateColumnToCopy( Vdbe *v, /* The VDBE containing code to translate */ int iStart, /* Translate from this opcode to the end */ int iTabCur, /* OP_Column/OP_Rowid references to this table */ int iRegister /* The first column is in this register */ ){ VdbeOp *pOp = sqlite3VdbeGetOp(v, iStart); int iEnd = sqlite3VdbeCurrentAddr(v); for(; iStart<iEnd; iStart++, pOp++){ if( pOp->p1!=iTabCur ) continue; if( pOp->opcode==OP_Column ){ pOp->opcode = OP_Copy; pOp->p1 = pOp->p2 + iRegister; pOp->p2 = pOp->p3; pOp->p3 = 0; }else if( pOp->opcode==OP_Rowid ){ pOp->opcode = OP_Null; pOp->p1 = 0; pOp->p3 = 0; } } } /* ** Two routines for printing the content of an sqlite3_index_info ** structure. Used for testing and debugging only. If neither ** SQLITE_TEST or SQLITE_DEBUG are defined, then these routines ** are no-ops. */ |
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1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 | 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 | + | WhereLoop *pLoop; /* The Loop object */ char *zNotUsed; /* Extra space on the end of pIdx */ Bitmask idxCols; /* Bitmap of columns used for indexing */ Bitmask extraCols; /* Bitmap of additional columns */ u8 sentWarning = 0; /* True if a warnning has been issued */ Expr *pPartial = 0; /* Partial Index Expression */ int iContinue = 0; /* Jump here to skip excluded rows */ struct SrcList_item *pTabItem; /* FROM clause term being indexed */ /* Generate code to skip over the creation and initialization of the ** transient index on 2nd and subsequent iterations of the loop. */ v = pParse->pVdbe; assert( v!=0 ); addrInit = sqlite3CodeOnce(pParse); VdbeCoverage(v); |
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1883 1884 1885 1886 1887 1888 1889 | 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 | + + + + + + + + - + + + + + + + - + + | pLevel->iIdxCur = pParse->nTab++; sqlite3VdbeAddOp2(v, OP_OpenAutoindex, pLevel->iIdxCur, nKeyCol+1); sqlite3VdbeSetP4KeyInfo(pParse, pIdx); VdbeComment((v, "for %s", pTable->zName)); /* Fill the automatic index with content */ sqlite3ExprCachePush(pParse); pTabItem = &pWC->pWInfo->pTabList->a[pLevel->iFrom]; if( pTabItem->viaCoroutine ){ int regYield = pTabItem->regReturn; sqlite3VdbeAddOp3(v, OP_InitCoroutine, regYield, 0, pTabItem->addrFillSub); addrTop = sqlite3VdbeAddOp1(v, OP_Yield, regYield); VdbeCoverage(v); VdbeComment((v, "next row of \"%s\"", pTabItem->pTab->zName)); }else{ |
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5170 5171 5172 5173 5174 5175 5176 | 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 | - + - + - - - - - + + + + | pProbe = &sPk; } rSize = pTab->nRowLogEst; rLogSize = estLog(rSize); #ifndef SQLITE_OMIT_AUTOMATIC_INDEX /* Automatic indexes */ |
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7013 7014 7015 7016 7017 7018 7019 | 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 | - + - - + - - - - - - + - - - - - - - - | Index *pIdx = 0; struct SrcList_item *pTabItem = &pTabList->a[pLevel->iFrom]; Table *pTab = pTabItem->pTab; assert( pTab!=0 ); pLoop = pLevel->pWLoop; /* For a co-routine, change all OP_Column references to the table of |
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Added test/autoindex5.test.