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If the keyword "unordered" appears at the end of the SQLITE_STAT1.STAT

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column for an index, then use that index for equality lookups only, never 
for range queries or sorting.  This feature is currently undocumented and
my change or be removed in a future release.

FossilOrigin-Name: 8a42e236701c8afd9ada7d4568712a21690ea087
This commit is contained in:
drh
2011-04-09 03:20:59 +00:00
parent 2184fc75a2 d6ee353c84
commit c2822b76b4
5 changed files with 16 additions and 10 deletions
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src/sqliteInt.h
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@@ -1476,6 +1476,7 @@ struct Index {
int tnum; /* Page containing root of this index in database file */
u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */
u8 bUnordered; /* Use this index for == or IN queries only */
char *zColAff; /* String defining the affinity of each column */
Index *pNext; /* The next index associated with the same table */
Schema *pSchema; /* Schema containing this index */