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Experimental attempt to make better use of covering indexes within OR queries.

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FossilOrigin-Name: a323ac3a9d42bd5cb38d724c7e1180584b91054c
This commit is contained in:
dan
2016-01-29 19:29:45 +00:00
parent 65875f37bc
commit de892d9660
7 changed files with 121 additions and 22 deletions
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6
src/vdbeInt.h
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@@ -74,6 +74,7 @@ typedef struct AuxData AuxData;
** * A virtual table
** * A one-row "pseudotable" stored in a single register
*/
typedef struct VdbeCursor VdbeCursor;
struct VdbeCursor {
u8 eCurType; /* One of the CURTYPE_* values above */
i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */
@@ -100,6 +101,8 @@ struct VdbeCursor {
int seekResult; /* Result of previous sqlite3BtreeMoveto() */
i64 seqCount; /* Sequence counter */
i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */
VdbeCursor *pAltCursor; /* Set by OP_Seek */
int *aAltMap; /* Set by OP_Seek */
#ifdef SQLITE_ENABLE_COLUMN_USED_MASK
u64 maskUsed; /* Mask of columns used by this cursor */
#endif
@@ -124,7 +127,6 @@ struct VdbeCursor {
** static element declared in the structure. nField total array slots for
** aType[] and nField+1 array slots for aOffset[] */
};
typedef struct VdbeCursor VdbeCursor;
/*
** When a sub-program is executed (OP_Program), a structure of this type
@@ -423,7 +425,7 @@ struct Vdbe {
void sqlite3VdbeError(Vdbe*, const char *, ...);
void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*);
void sqliteVdbePopStack(Vdbe*,int);
int sqlite3VdbeCursorMoveto(VdbeCursor*);
int sqlite3VdbeCursorMoveto(VdbeCursor**, int*);
int sqlite3VdbeCursorRestore(VdbeCursor*);
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
void sqlite3VdbePrintOp(FILE*, int, Op*);