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Add a new (experimental) sqlite3_stmt_status() verb that returns the number

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of VM steps.

FossilOrigin-Name: f1366bab737a3ac2ea20a0ec014cc306d7ded8a5
This commit is contained in:
drh
2013-06-25 22:01:22 +00:00
parent adbae616bd
commit bf159fa21b
7 changed files with 32 additions and 13 deletions
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10
src/sqlite.h.in
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@@ -6303,11 +6303,21 @@ int sqlite3_stmt_status(sqlite3_stmt*, int op,int resetFlg);
** A non-zero value in this counter may indicate an opportunity to
** improvement performance by adding permanent indices that do not
** need to be reinitialized each time the statement is run.</dd>
**
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647. The number of virtual machine operations can be
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.
** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP 1
#define SQLITE_STMTSTATUS_SORT 2
#define SQLITE_STMTSTATUS_AUTOINDEX 3
#define SQLITE_STMTSTATUS_VM_STEP 4
/*
** CAPI3REF: Custom Page Cache Object