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Add the SQLITE_STMTSTATUS_MEMUSED option for sqlite3_stmt_status() that reports

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the amount of heap memory used for a single prepared statement.

FossilOrigin-Name: b57d510465458dec5b5fc778fd6e8833392964201f9febebf526e60a543da0c2
This commit is contained in:
drh
2017-05-31 16:21:54 +00:00
parent 6b37e0adc9
commit 3528f6b62b
5 changed files with 34 additions and 13 deletions
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ext/misc/stmts.c
+4 -2
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@@ -98,10 +98,11 @@ static int stmtsConnect(
#define STMTS_COLUMN_NSORT 6 /* SQLITE_STMTSTATUS_SORT */
#define STMTS_COLUMN_NAIDX 7 /* SQLITE_STMTSTATUS_AUTOINDEX */
#define STMTS_COLUMN_NSTEP 8 /* SQLITE_STMTSTATUS_VM_STEP */
#define STMTS_COLUMN_MEM 9 /* SQLITE_STMTSTATUS_MEMUSED */
rc = sqlite3_declare_vtab(db,
"CREATE TABLE x(ptr,sql,ncol,ro,busy,nscan,nsort,naidx,nstep)");
"CREATE TABLE x(ptr,sql,ncol,ro,busy,nscan,nsort,naidx,nstep,mem)");
if( rc==SQLITE_OK ){
pNew = sqlite3_malloc( sizeof(*pNew) );
*ppVtab = (sqlite3_vtab*)pNew;
@@ -186,7 +187,8 @@ static int stmtsColumn(
case STMTS_COLUMN_NSCAN:
case STMTS_COLUMN_NSORT:
case STMTS_COLUMN_NAIDX:
case STMTS_COLUMN_NSTEP: {
case STMTS_COLUMN_NSTEP:
case STMTS_COLUMN_MEM: {
sqlite3_result_int(ctx, sqlite3_stmt_status(pCur->pStmt,
i-STMTS_COLUMN_NSCAN+SQLITE_STMTSTATUS_FULLSCAN_STEP, 0));
break;