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Return an error if a "RANGE" window-frame uses "<expr> PRECEDING" or "<expr>

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FOLLOWING".

FossilOrigin-Name: 786c87ba4150509e141baab32c51e64bbd3ce323735e0f47d65ed54d14215bc4
This commit is contained in:
dan
2018-07-05 18:34:53 +00:00
parent 683b0fffee
commit 7a606e1ab2
4 changed files with 28 additions and 9 deletions
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10
src/window.c
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@@ -837,7 +837,15 @@ Window *sqlite3WindowAlloc(
int eStart, Expr *pStart,
int eEnd, Expr *pEnd
){
Window *pWin = (Window*)sqlite3DbMallocZero(pParse->db, sizeof(Window));
Window *pWin = 0;
if( eType==TK_RANGE && (pStart || pEnd) ){
sqlite3ErrorMsg(pParse, "RANGE %s is only supported with UNBOUNDED",
(pStart ? "PRECEDING" : "FOLLOWING")
);
}else{
pWin = (Window*)sqlite3DbMallocZero(pParse->db, sizeof(Window));
}
if( pWin ){
assert( eType );