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Give the virtual table xBestIndex method access to (some) OFFSET and LIMIT

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clauses.

FossilOrigin-Name: 74fa5757ee0a8499bcd6546dac1a3ecc6048ba9cff9e3e574e28e6e82e894a3d
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drh
2022-01-27 16:14:50 +00:00
parent 4b51e8bd68
commit 895bab3383
14 changed files with 174 additions and 35 deletions
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src/whereInt.h
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@@ -453,6 +453,9 @@ struct WhereInfo {
ExprList *pOrderBy; /* The ORDER BY clause or NULL */
ExprList *pResultSet; /* Result set of the query */
Expr *pWhere; /* The complete WHERE clause */
#ifndef SQLITE_OMIT_VIRTUALTABLE
Select *pLimit; /* Used to access LIMIT expr/registers for vtabs */
#endif
int aiCurOnePass[2]; /* OP_OpenWrite cursors for the ONEPASS opt */
int iContinue; /* Jump here to continue with next record */
int iBreak; /* Jump here to break out of the loop */
@@ -538,6 +541,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
void sqlite3WhereClauseInit(WhereClause*,WhereInfo*);
void sqlite3WhereClauseClear(WhereClause*);
void sqlite3WhereSplit(WhereClause*,Expr*,u8);
void sqlite3WhereAddLimit(WhereClause*, Select*);
Bitmask sqlite3WhereExprUsage(WhereMaskSet*, Expr*);
Bitmask sqlite3WhereExprUsageNN(WhereMaskSet*, Expr*);
Bitmask sqlite3WhereExprListUsage(WhereMaskSet*, ExprList*);