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Fix handling of NULL, text and blob values in window queries that use "RANGE BETWEEN A FOLLOWING AND B FOLLOWING", or "B PRECEDING AND A PRECEDING", where A>B.

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FossilOrigin-Name: cb3e2be674316e1d39968eb6567f1fe1b72f9d89af49640a9e83f944979c4cf0
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dan
2019-09-04 06:56:43 +00:00
parent 7dc3547eeb
commit 1a97c413f8
5 changed files with 324 additions and 16 deletions
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2
src/window.c
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@@ -2745,7 +2745,7 @@ void sqlite3WindowCodeStep(
windowCheckValue(pParse, regEnd, 1 + (pMWin->eFrmType==TK_RANGE ? 3 : 0));
}
if( pMWin->eStart==pMWin->eEnd && regStart ){
if( pMWin->eFrmType!=TK_RANGE && pMWin->eStart==pMWin->eEnd && regStart ){
int op = ((pMWin->eStart==TK_FOLLOWING) ? OP_Ge : OP_Le);
int addrGe = sqlite3VdbeAddOp3(v, op, regStart, 0, regEnd);
VdbeCoverageNeverNullIf(v, op==OP_Ge); /* NeverNull because bound <expr> */