Attempt to use sqlite_stat4 data to estimate the number of rows visited by a range query that uses a skip-scan. This code is largely untested.
FossilOrigin-Name: 01dc8102592427b71a18c2cb82301d2266dd59c2
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index cc3a030..7e347c4 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3431,7 +3431,9 @@
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
void sqlite3AnalyzeFunctions(void);
int sqlite3Stat4ProbeSetValue(Parse*,Index*,UnpackedRecord**,Expr*,u8,int,int*);
+int sqlite3Stat4ValueFromExpr(Parse*, Expr*, u8, sqlite3_value**);
void sqlite3Stat4ProbeFree(UnpackedRecord*);
+int sqlite3Stat4Column(sqlite3*, const void*, int, int, sqlite3_value**);
#endif
/*