The query planner tries to avoids using indexes that use unknown collating
functions.
FossilOrigin-Name: 02013fc120bf71a8be3550c696a588af8c92f2209f8e5db530624878ddc8aa7e
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 27b896d..47d9fc6 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -2172,6 +2172,7 @@
unsigned isCovering:1; /* True if this is a covering index */
unsigned noSkipScan:1; /* Do not try to use skip-scan if true */
unsigned hasStat1:1; /* aiRowLogEst values come from sqlite_stat1 */
+ unsigned bNoQuery:1; /* Do not use this index to optimize queries */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
int nSample; /* Number of elements in aSample[] */
int nSampleCol; /* Size of IndexSample.anEq[] and so on */
@@ -2984,7 +2985,7 @@
int nMem; /* Number of memory cells used so far */
int nOpAlloc; /* Number of slots allocated for Vdbe.aOp[] */
int szOpAlloc; /* Bytes of memory space allocated for Vdbe.aOp[] */
- int iSelfTab; /* Table for associated with an index on expr, or negative
+ int iSelfTab; /* Table associated with an index on expr, or negative
** of the base register during check-constraint eval */
int iCacheLevel; /* ColCache valid when aColCache[].iLevel<=iCacheLevel */
int iCacheCnt; /* Counter used to generate aColCache[].lru values */