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Fix a potential NULL pointer dereference on a RENAME TABLE that references

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a VIEW with a logic error in a window function in the ORDER BY clause.

FossilOrigin-Name: 0adb273f7e7671efb0e0a1619887e369500dfd2db7ef1b1e125c2414ea96e96f
This commit is contained in:
drh
2019-11-16 11:33:39 +00:00
parent 5710f1ad48
commit 47bcc34271
4 changed files with 19 additions and 10 deletions
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4
src/window.c
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@@ -1244,8 +1244,8 @@ void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
** SELECT, or (b) the windows already linked use a compatible window frame.
*/
void sqlite3WindowLink(Select *pSel, Window *pWin){
if( 0==pSel->pWin
|| 0==sqlite3WindowCompare(0, pSel->pWin, pWin, 0)
if( pSel!=0
&& (0==pSel->pWin || 0==sqlite3WindowCompare(0, pSel->pWin, pWin, 0))
){
pWin->pNextWin = pSel->pWin;
if( pSel->pWin ){