a34605859d
is being read during SELECT processing. (CVS 5399) FossilOrigin-Name: c80a5d09935c60a2a50bc262c172a94073355f0d
139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/*
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** 2007 May 05
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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*************************************************************************
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** Code for testing the btree.c module in SQLite. This code
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** is not included in the SQLite library. It is used for automated
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** testing of the SQLite library.
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**
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** $Id: test_btree.c,v 1.5 2008/07/11 21:02:54 drh Exp $
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*/
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#include "btreeInt.h"
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#include <tcl.h>
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/*
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** Usage: sqlite3_shared_cache_report
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**
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** Return a list of file that are shared and the number of
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** references to each file.
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*/
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int sqlite3BtreeSharedCacheReport(
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void * clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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#ifndef SQLITE_OMIT_SHARED_CACHE
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extern BtShared *sqlite3SharedCacheList;
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BtShared *pBt;
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Tcl_Obj *pRet = Tcl_NewObj();
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for(pBt=sqlite3SharedCacheList; pBt; pBt=pBt->pNext){
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const char *zFile = sqlite3PagerFilename(pBt->pPager);
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Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj(zFile, -1));
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Tcl_ListObjAppendElement(interp, pRet, Tcl_NewIntObj(pBt->nRef));
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}
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Tcl_SetObjResult(interp, pRet);
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#endif
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return TCL_OK;
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}
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/*
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** Print debugging information about all cursors to standard output.
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*/
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void sqlite3BtreeCursorList(Btree *p){
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BtCursor *pCur;
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BtShared *pBt = p->pBt;
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for(pCur=pBt->pCursor; pCur; pCur=pCur->pNext){
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MemPage *pPage = pCur->pPage;
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char *zMode = pCur->wrFlag ? "rw" : "ro";
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sqlite3DebugPrintf("CURSOR %p rooted at %4d(%s) currently at %d.%d%s\n",
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pCur, pCur->pgnoRoot, zMode,
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pPage ? pPage->pgno : 0, pCur->idx,
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(pCur->eState==CURSOR_VALID) ? "" : " eof"
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);
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}
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}
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/*
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** Fill aResult[] with information about the entry and page that the
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** cursor is pointing to.
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**
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** aResult[0] = The page number
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** aResult[1] = The entry number
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** aResult[2] = Total number of entries on this page
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** aResult[3] = Cell size (local payload + header)
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** aResult[4] = Number of free bytes on this page
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** aResult[5] = Number of free blocks on the page
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** aResult[6] = Total payload size (local + overflow)
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** aResult[7] = Header size in bytes
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** aResult[8] = Local payload size
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** aResult[9] = Parent page number
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** aResult[10]= Page number of the first overflow page
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**
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** This routine is used for testing and debugging only.
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*/
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int sqlite3BtreeCursorInfo(BtCursor *pCur, int *aResult, int upCnt){
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int cnt, idx;
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MemPage *pPage = pCur->pPage;
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BtCursor tmpCur;
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int rc;
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if( pCur->eState==CURSOR_REQUIRESEEK ){
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rc = sqlite3BtreeRestoreCursorPosition(pCur);
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if( rc!=SQLITE_OK ){
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return rc;
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}
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}
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assert( pPage->isInit );
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sqlite3BtreeGetTempCursor(pCur, &tmpCur);
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while( upCnt-- ){
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sqlite3BtreeMoveToParent(&tmpCur);
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}
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pPage = tmpCur.pPage;
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aResult[0] = sqlite3PagerPagenumber(pPage->pDbPage);
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assert( aResult[0]==pPage->pgno );
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aResult[1] = tmpCur.idx;
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aResult[2] = pPage->nCell;
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if( tmpCur.idx>=0 && tmpCur.idx<pPage->nCell ){
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sqlite3BtreeParseCell(tmpCur.pPage, tmpCur.idx, &tmpCur.info);
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aResult[3] = tmpCur.info.nSize;
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aResult[6] = tmpCur.info.nData;
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aResult[7] = tmpCur.info.nHeader;
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aResult[8] = tmpCur.info.nLocal;
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}else{
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aResult[3] = 0;
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aResult[6] = 0;
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aResult[7] = 0;
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aResult[8] = 0;
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}
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aResult[4] = pPage->nFree;
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cnt = 0;
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idx = get2byte(&pPage->aData[pPage->hdrOffset+1]);
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while( idx>0 && idx<pPage->pBt->usableSize ){
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cnt++;
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idx = get2byte(&pPage->aData[idx]);
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}
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aResult[5] = cnt;
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if( pPage->pParent==0 || sqlite3BtreeIsRootPage(pPage) ){
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aResult[9] = 0;
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}else{
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aResult[9] = pPage->pParent->pgno;
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}
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if( tmpCur.info.iOverflow ){
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aResult[10] = get4byte(&tmpCur.info.pCell[tmpCur.info.iOverflow]);
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}else{
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aResult[10] = 0;
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}
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sqlite3BtreeReleaseTempCursor(&tmpCur);
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return SQLITE_OK;
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}
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