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Do not overflow the Index.aSample[] array if the same index appears in

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the sqlite_stat4 table under multiple names because it is a WITHOUT ROWID
primary key index.  [forum:/info/537d8ab118df7edd|Forum post 537d8ab118df7edd]

FossilOrigin-Name: 9350a25ac0b55a6b901bc50e4db6d4e883c2617e1d2a8fdc90effabe52bb0012
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drh
2023-05-03 05:00:10 +00:00
parent 8777bdb78a
commit 790adfd8ec
5 changed files with 34 additions and 9 deletions
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src/sqliteInt.h
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@@ -2700,6 +2700,7 @@ struct Index {
** expression, or a reference to a VIRTUAL column */
#ifdef SQLITE_ENABLE_STAT4
int nSample; /* Number of elements in aSample[] */
int mxSample; /* Number of slots allocated to aSample[] */
int nSampleCol; /* Size of IndexSample.anEq[] and so on */
tRowcnt *aAvgEq; /* Average nEq values for keys not in aSample */
IndexSample *aSample; /* Samples of the left-most key */