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Add support for using indexes for some ORDER BY clauses that use non-default NULL handling. Still some problems on this branch.

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FossilOrigin-Name: 81069d7196857e909c94195d67388f71bc9f832eafd9156d8c5cdddb63513b4a
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dan
2019-08-16 21:07:19 +00:00
parent 6e11892db8
commit 15750a26fa
6 changed files with 133 additions and 69 deletions
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6
src/whereInt.h
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@@ -71,13 +71,15 @@ struct WhereLevel {
int addrCont; /* Jump here to continue with the next loop cycle */
int addrFirst; /* First instruction of interior of the loop */
int addrBody; /* Beginning of the body of this loop */
int regBignull; /* big-null flag register */
int addrBignull; /* Jump here for next part of big-null scan */
#ifndef SQLITE_LIKE_DOESNT_MATCH_BLOBS
u32 iLikeRepCntr; /* LIKE range processing counter register (times 2) */
int addrLikeRep; /* LIKE range processing address */
#endif
u8 iFrom; /* Which entry in the FROM clause */
u8 op, p3, p5; /* Opcode, P3 & P5 of the opcode that ends the loop */
int p1, p2; /* Operands of the opcode used to ends the loop */
int p1, p2; /* Operands of the opcode used to end the loop */
union { /* Information that depends on pWLoop->wsFlags */
struct {
int nIn; /* Number of entries in aInLoop[] */
@@ -586,6 +588,6 @@ void sqlite3WhereTabFuncArgs(Parse*, struct SrcList_item*, WhereClause*);
#define WHERE_UNQ_WANTED 0x00010000 /* WHERE_ONEROW would have been helpful*/
#define WHERE_PARTIALIDX 0x00020000 /* The automatic index is partial */
#define WHERE_IN_EARLYOUT 0x00040000 /* Perhaps quit IN loops early */
#define WHERE_MIN_ORDERED 0x00080000 /* Column nEq of index is min() expr */
#define WHERE_BIGNULL_SORT 0x00080000 /* Column nEq of index is BIGNULL */
#endif /* !defined(SQLITE_WHEREINT_H) */