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Begin adding experimental sqlite_stat4 table. This commit is buggy.

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FossilOrigin-Name: 2beea303a1d609cd2ff252412c50b966b9e5e8f1
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dan
2013-08-03 20:24:58 +00:00
parent 3975974780
commit f52bb8d385
25 changed files with 663 additions and 469 deletions
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15
src/sqliteInt.h
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@@ -1558,16 +1558,11 @@ struct Index {
** analyze.c source file for additional information.
*/
struct IndexSample {
union {
char *z; /* Value if eType is SQLITE_TEXT or SQLITE_BLOB */
double r; /* Value if eType is SQLITE_FLOAT */
i64 i; /* Value if eType is SQLITE_INTEGER */
} u;
u8 eType; /* SQLITE_NULL, SQLITE_INTEGER ... etc. */
int nByte; /* Size in byte of text or blob. */
tRowcnt nEq; /* Est. number of rows where the key equals this sample */
tRowcnt nLt; /* Est. number of rows where key is less than this sample */
tRowcnt nDLt; /* Est. number of distinct keys less than this sample */
void *p; /* Pointer to sampled record */
int n; /* Size of record in bytes */
tRowcnt *anEq; /* Est. number of rows where the key equals this sample */
tRowcnt *anLt; /* Est. number of rows where key is less than this sample */
tRowcnt *anDLt; /* Est. number of distinct keys less than this sample */
};
/*