diff options
Diffstat (limited to 'src/btree.c')
| -rw-r--r-- | src/btree.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/btree.c b/src/btree.c index d24f6a876..1223f78e4 100644 --- a/src/btree.c +++ b/src/btree.c @@ -8177,6 +8177,13 @@ int sqlite3BtreeDropTable(Btree *p, int iTable, int *piMoved){ ** The schema layer numbers meta values differently. At the schema ** layer (and the SetCookie and ReadCookie opcodes) the number of ** free pages is not visible. So Cookie[0] is the same as Meta[1]. +** +** This routine treats Meta[BTREE_DATA_VERSION] as a special case. Instead +** of reading the value out of the header, it instead loads the "DataVersion" +** from the pager. The BTREE_DATA_VERSION value is not actually stored in the +** database file. It is a number computed by the pager. But its access +** pattern is the same as header meta values, and so it is convenient to +** read it from this routine. */ void sqlite3BtreeGetMeta(Btree *p, int idx, u32 *pMeta){ BtShared *pBt = p->pBt; @@ -8187,7 +8194,11 @@ void sqlite3BtreeGetMeta(Btree *p, int idx, u32 *pMeta){ assert( pBt->pPage1 ); assert( idx>=0 && idx<=15 ); - *pMeta = get4byte(&pBt->pPage1->aData[36 + idx*4]); + if( idx==BTREE_DATA_VERSION ){ + *pMeta = sqlite3PagerDataVersion(pBt->pPager); + }else{ + *pMeta = get4byte(&pBt->pPage1->aData[36 + idx*4]); + } /* If auto-vacuum is disabled in this build and this is an auto-vacuum ** database, mark the database as read-only. */ |