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Improve the ability of the query planner to recognize covering indexes even

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on tables with more than 63 columns and where the index is over columns
beyond the 63rd column.

FossilOrigin-Name: 3d1992de4733d4e155f2d6d5268323410d1104ab56db50f08a2bb26bf87d926b
This commit is contained in:
drh
2022-10-24 13:50:04 +00:00
parent f44f3290df
commit 239befa5fc
11 changed files with 277 additions and 24 deletions
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4
src/sqliteInt.h
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@@ -1138,6 +1138,7 @@ typedef struct With With;
#define MASKBIT(n) (((Bitmask)1)<<(n))
#define MASKBIT32(n) (((unsigned int)1)<<(n))
#define ALLBITS ((Bitmask)-1)
#define TOPBIT (((Bitmask)1)<<(BMS-1))
/* A VList object records a mapping between parameters/variables/wildcards
** in the SQL statement (such as $abc, @pqr, or :xyz) and the integer
@@ -3521,6 +3522,7 @@ struct Walker {
struct WindowRewrite *pRewrite; /* Window rewrite context */
struct WhereConst *pConst; /* WHERE clause constants */
struct RenameCtx *pRename; /* RENAME COLUMN context */
struct CoveringIndexCheck *pCovIdxCk; /* Check for covering index */
} u;
};
@@ -4013,7 +4015,7 @@ Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,char*);
void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*);
void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*,
Upsert*);
WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int);
WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,Select*,u16,int);
void sqlite3WhereEnd(WhereInfo*);
LogEst sqlite3WhereOutputRowCount(WhereInfo*);
int sqlite3WhereIsDistinct(WhereInfo*);