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Avoid discarding an ORDER BY clause in the case where an identical GROUP BY clauses uses an index to group, but not sort, the rows. Fix for [b75a9ca6b0].

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FossilOrigin-Name: de9a490f594183f337a2ec9e0f87792eac83548b
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dan
2014-04-21 13:21:56 +00:00
parent b355c2cc12
commit 374cd78c1d
7 changed files with 164 additions and 27 deletions
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src/sqliteInt.h
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@@ -2125,6 +2125,7 @@ struct SrcList {
#define WHERE_GROUPBY 0x0100 /* pOrderBy is really a GROUP BY */
#define WHERE_DISTINCTBY 0x0200 /* pOrderby is really a DISTINCT clause */
#define WHERE_WANT_DISTINCT 0x0400 /* All output needs to be distinct */
#define WHERE_SORTBYGROUP 0x0800 /* Support sqlite3WhereIsSorted() */
/* Allowed return values from sqlite3WhereIsDistinct()
*/
@@ -3092,6 +3093,7 @@ void sqlite3WhereEnd(WhereInfo*);
u64 sqlite3WhereOutputRowCount(WhereInfo*);
int sqlite3WhereIsDistinct(WhereInfo*);
int sqlite3WhereIsOrdered(WhereInfo*);
int sqlite3WhereIsSorted(WhereInfo*);
int sqlite3WhereContinueLabel(WhereInfo*);
int sqlite3WhereBreakLabel(WhereInfo*);
int sqlite3WhereOkOnePass(WhereInfo*, int*);