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Avoid a test for CURTYPE_BTREE in sqlite3VdbeCursorMoveto() in order to reduce

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the size and improve the performance of OP_Column.

FossilOrigin-Name: f078deb25149b7b1881b7f3374b343d0677e82336d8fdd7f1cdd06d926b5dd57
This commit is contained in:
drh
2017-08-16 19:20:20 +00:00
parent 1f613c4df3
commit fe0cf7a18c
8 changed files with 56 additions and 38 deletions
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12
src/vdbeInt.h
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@@ -96,18 +96,18 @@ struct VdbeCursor {
u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */
int seekResult; /* Result of previous sqlite3BtreeMoveto() or 0
** if there have been no prior seeks on the cursor. */
/* NB: seekResult does not distinguish between "no seeks have ever occurred
** on this cursor" and "the most recent seek was an exact match". */
/* seekResult does not distinguish between "no seeks have ever occurred
** on this cursor" and "the most recent seek was an exact match".
** For CURTYPE_PSEUDO, seekResult is the register holding the record */
/* When a new VdbeCursor is allocated, only the fields above are zeroed.
** The fields that follow are uninitialized, and must be individually
** initialized prior to first use. */
VdbeCursor *pAltCursor; /* Associated index cursor from which to read */
union {
BtCursor *pCursor; /* CURTYPE_BTREE. Btree cursor */
sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */
int pseudoTableReg; /* CURTYPE_PSEUDO. Reg holding content. */
VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */
BtCursor *pCursor; /* CURTYPE_BTREE or _PSEUDO. Btree cursor */
sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */
VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */
} uc;
KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */
u32 iHdrOffset; /* Offset to next unparsed byte of the header */