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Overview
| Comment: | Fix a bug in the lead() and lag() window functions causing them to fail when used in queries featuring multiple window functions. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | exp-window-functions |
| Files: | files | file ages | folders |
| SHA3-256: | 3839fb18f917e4f705821198d624b19d |
| User & Date: | dan 2018-06-15 16:10:44 |
Context
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2018-06-15
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| 19:01 | Fix another problem in lead()/lag(). And some errors that could occur following OOM faults. check-in: fadd4dc1 user: dan tags: exp-window-functions | |
| 16:10 | Fix a bug in the lead() and lag() window functions causing them to fail when used in queries featuring multiple window functions. check-in: 3839fb18 user: dan tags: exp-window-functions | |
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2018-06-14
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| 20:52 | Fix a problem with handling of statements containing two or more different windows. check-in: 567e09ef user: dan tags: exp-window-functions | |
Changes
Changes to src/window.c.
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sqlite3VdbeAddOp3(v, OP_MakeRecord, reg, nSub, regRecord);
/* Check if this is the start of a new partition. If so, call the
** flush_partition sub-routine. */
if( pMWin->pPartition ){
int addr;
ExprList *pPart = pMWin->pPartition;
int nPart = (pPart ? pPart->nExpr : 0);
int regNewPart = reg + pMWin->nBufferCol;
KeyInfo *pKeyInfo = sqlite3KeyInfoFromExprList(pParse, pPart, 0, 0);
addr = sqlite3VdbeAddOp3(v, OP_Compare, regNewPart, pMWin->regPart,nPart);
sqlite3VdbeAppendP4(v, (void*)pKeyInfo, P4_KEYINFO);
sqlite3VdbeAddOp3(v, OP_Jump, addr+2, addr+4, addr+2);
sqlite3VdbeAddOp3(v, OP_Copy, regNewPart, pMWin->regPart, nPart-1);
................................................................................
sqlite3VdbeAddOp3(v, OP_SeekRowid, csr, lbl, tmpReg);
sqlite3VdbeAddOp3(v, OP_Column, csr, pWin->iArgCol, pWin->regResult);
sqlite3VdbeResolveLabel(v, lbl);
sqlite3ReleaseTempReg(pParse, tmpReg);
}
else if( pFunc->xSFunc==leadStepFunc || pFunc->xSFunc==lagStepFunc ){
int nArg = pWin->pOwner->x.pList->nExpr;
int iEph = pWin->iEphCsr;
int csr = pWin->csrApp;
int lbl = sqlite3VdbeMakeLabel(v);
int tmpReg = sqlite3GetTempReg(pParse);
if( nArg<3 ){
sqlite3VdbeAddOp2(v, OP_Null, 0, pWin->regResult);
}else{
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sqlite3VdbeAddOp3(v, OP_MakeRecord, reg, nSub, regRecord);
/* Check if this is the start of a new partition. If so, call the
** flush_partition sub-routine. */
if( pMWin->pPartition ){
int addr;
ExprList *pPart = pMWin->pPartition;
int nPart = pPart->nExpr;
int regNewPart = reg + pMWin->nBufferCol;
KeyInfo *pKeyInfo = sqlite3KeyInfoFromExprList(pParse, pPart, 0, 0);
addr = sqlite3VdbeAddOp3(v, OP_Compare, regNewPart, pMWin->regPart,nPart);
sqlite3VdbeAppendP4(v, (void*)pKeyInfo, P4_KEYINFO);
sqlite3VdbeAddOp3(v, OP_Jump, addr+2, addr+4, addr+2);
sqlite3VdbeAddOp3(v, OP_Copy, regNewPart, pMWin->regPart, nPart-1);
................................................................................
sqlite3VdbeAddOp3(v, OP_SeekRowid, csr, lbl, tmpReg);
sqlite3VdbeAddOp3(v, OP_Column, csr, pWin->iArgCol, pWin->regResult);
sqlite3VdbeResolveLabel(v, lbl);
sqlite3ReleaseTempReg(pParse, tmpReg);
}
else if( pFunc->xSFunc==leadStepFunc || pFunc->xSFunc==lagStepFunc ){
int nArg = pWin->pOwner->x.pList->nExpr;
int iEph = pMWin->iEphCsr;
int csr = pWin->csrApp;
int lbl = sqlite3VdbeMakeLabel(v);
int tmpReg = sqlite3GetTempReg(pParse);
if( nArg<3 ){
sqlite3VdbeAddOp2(v, OP_Null, 0, pWin->regResult);
}else{
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Changes to test/window1.test.
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} {1 {misuse of window function nth_value()}}
do_catchsql_test 7.1.5 {
SELECT count(*) FROM t1 LIMIT nth_value(x, 1) OVER (ORDER BY y);
} {1 {no such column: x}}
do_catchsql_test 7.1.6 {
SELECT trim(x) OVER (ORDER BY y) FROM t1;
} {1 {trim() may not be used as a window function}}
do_catchsql_test 7.1.7 {
SELECT max(x) OVER abc FROM t1 WINDOW def AS (ORDER BY y);
} {1 {no such window: abc}}
finish_test
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< > > > > > > > > > > > |
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} {1 {misuse of window function nth_value()}}
do_catchsql_test 7.1.5 {
SELECT count(*) FROM t1 LIMIT nth_value(x, 1) OVER (ORDER BY y);
} {1 {no such column: x}}
do_catchsql_test 7.1.6 {
SELECT trim(x) OVER (ORDER BY y) FROM t1;
} {1 {trim() may not be used as a window function}}
do_catchsql_test 7.1.7 {
SELECT max(x) OVER abc FROM t1 WINDOW def AS (ORDER BY y);
} {1 {no such window: abc}}
do_execsql_test 7.2 {
SELECT
lead(y) OVER win,
lead(y, 2) OVER win,
lead(y, 3, 'default') OVER win
FROM t1
WINDOW win AS (ORDER BY x)
} {
4 6 8 6 8 10 8 10 default 10 {} default {} {} default
}
finish_test
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Changes to test/window4.tcl.
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set p1 [lindex $lPart 0]
set p2 [lindex $lPart 0]
foreach o1 $lOrder { foreach o2 $lOrder {
execsql_test 4.5.$tn.1 [subst $SQL]
execsql_test 4.5.$tn.2 [subst $SQL2]
incr tn
}}
finish_test
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set p1 [lindex $lPart 0]
set p2 [lindex $lPart 0]
foreach o1 $lOrder { foreach o2 $lOrder {
execsql_test 4.5.$tn.1 [subst $SQL]
execsql_test 4.5.$tn.2 [subst $SQL2]
incr tn
}}
==========
execsql_test 7.0 {
DROP TABLE IF EXISTS t1;
CREATE TABLE t1(x INTEGER, y INTEGER);
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t1 VALUES(3, 4);
INSERT INTO t1 VALUES(5, 6);
INSERT INTO t1 VALUES(7, 8);
INSERT INTO t1 VALUES(9, 10);
}
execsql_test 7.1 {
SELECT lead(y) OVER win FROM t1
WINDOW win AS (ORDER BY x)
}
execsql_test 7.2 {
SELECT lead(y, 2) OVER win FROM t1
WINDOW win AS (ORDER BY x)
}
execsql_test 7.3 {
SELECT lead(y, 3, -1) OVER win FROM t1
WINDOW win AS (ORDER BY x)
}
execsql_test 7.4 {
SELECT
lead(y) OVER win, lead(y) OVER win
FROM t1
WINDOW win AS (ORDER BY x)
}
execsql_test 7.5 {
SELECT
lead(y) OVER win,
lead(y, 2) OVER win,
lead(y, 3, -1) OVER win
FROM t1
WINDOW win AS (ORDER BY x)
}
finish_test
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Changes to test/window4.test.
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} {1 1 2 2 3 3 2 1 3 2 4 3 3 1 4 2 5 3}
do_execsql_test 4.5.73.2 {
SELECT sum(c) OVER (PARTITION BY b ORDER BY b, a RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW),
sum(c) OVER (PARTITION BY b ORDER BY b, a RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
FROM ttt ORDER BY a
} {1 1 2 2 3 3 3 3 5 5 7 7 6 6 9 9 12 12}
finish_test
|
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} {1 1 2 2 3 3 2 1 3 2 4 3 3 1 4 2 5 3}
do_execsql_test 4.5.73.2 {
SELECT sum(c) OVER (PARTITION BY b ORDER BY b, a RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW),
sum(c) OVER (PARTITION BY b ORDER BY b, a RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
FROM ttt ORDER BY a
} {1 1 2 2 3 3 3 3 5 5 7 7 6 6 9 9 12 12}
#==========================================================================
do_execsql_test 7.0 {
DROP TABLE IF EXISTS t1;
CREATE TABLE t1(x INTEGER, y INTEGER);
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t1 VALUES(3, 4);
INSERT INTO t1 VALUES(5, 6);
INSERT INTO t1 VALUES(7, 8);
INSERT INTO t1 VALUES(9, 10);
} {}
do_execsql_test 7.1 {
SELECT lead(y) OVER win FROM t1
WINDOW win AS (ORDER BY x)
} {4 6 8 10 {}}
do_execsql_test 7.2 {
SELECT lead(y, 2) OVER win FROM t1
WINDOW win AS (ORDER BY x)
} {6 8 10 {} {}}
do_execsql_test 7.3 {
SELECT lead(y, 3, -1) OVER win FROM t1
WINDOW win AS (ORDER BY x)
} {8 10 -1 -1 -1}
do_execsql_test 7.4 {
SELECT
lead(y) OVER win, lead(y) OVER win
FROM t1
WINDOW win AS (ORDER BY x)
} {4 4 6 6 8 8 10 10 {} {}}
do_execsql_test 7.5 {
SELECT
lead(y) OVER win,
lead(y, 2) OVER win,
lead(y, 3, -1) OVER win
FROM t1
WINDOW win AS (ORDER BY x)
} {4 6 8 6 8 10 8 10 -1 10 {} -1 {} {} -1}
finish_test
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