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Overview
| Comment: | Fix "RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING" window frame processing. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | exp-window-functions |
| Files: | files | file ages | folders |
| SHA3-256: |
b4e9c686697a5211a3bfa47e63f0684e |
| User & Date: | dan 2018-05-25 20:30:17 |
Context
|
2018-05-26
| ||
| 21:17 | More fixes for different window frame types. check-in: 2c85668a user: dan tags: exp-window-functions | |
|
2018-05-25
| ||
| 20:30 | Fix "RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING" window frame processing. check-in: b4e9c686 user: dan tags: exp-window-functions | |
| 09:36 | Merge latest trunk changes into this branch. check-in: 62325198 user: dan tags: exp-window-functions | |
Changes
Changes to src/window.c.
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sqlite3VdbeAddOp3(v, OP_AggStep0, bInverse, reg, pWin->regAccum);
sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
sqlite3VdbeChangeP5(v, (u8)pWin->nArg);
}
}
/*
** ROWS BETWEEN <expr> PRECEDING AND <expr> FOLLOWING
**
** ...
** if( new partition ){
** Gosub flush_partition
** }
** Insert (record in eph-table)
** sqlite3WhereEnd()
** Gosub flush_partition
**
** flush_partition:
** Once {
** OpenDup (iEphCsr -> csrStart)
** OpenDup (iEphCsr -> csrEnd)
** }
** regStart = <expr1> // PRECEDING expression
** regEnd = <expr2> // FOLLOWING expression
** if( regStart<0 || regEnd<0 ) throw exception!
** Rewind (csr,csrStart,csrEnd) // if EOF goto flush_partition_done
** Aggstep (csrEnd)
** Next(csrEnd) // if EOF fall-through
** if( (regEnd--)<=0 ){
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( (regStart--)<=0 ){
** AggStep (csrStart, xInverse)
** Next(csrStart)
** }
** }
** flush_partition_done:
** ResetSorter (csr)
** Return
**
** ROWS BETWEEN <expr> PRECEDING AND CURRENT ROW
** ROWS BETWEEN CURRENT ROW AND <expr> FOLLOWING
** ROWS BETWEEN <expr> PRECEDING AND UNBOUNDED FOLLOWING
** ROWS BETWEEN UNBOUNDED PRECEDING AND <expr> FOLLOWING
**
** These are similar to the above. For "CURRENT ROW", intialize the
** register to 0. For "UNBOUNDED ..." to infinity.
**
** ROWS BETWEEN <expr> FOLLOWING AND <expr> FOLLOWING
**
** regEnd = regEnd - regStart
** Rewind (csr,csrStart,csrEnd) // if EOF goto flush_partition_done
** Aggstep (csrEnd)
** Next(csrEnd) // if EOF fall-through
................................................................................
int regStart; /* Value of <expr> PRECEDING */
int regEnd; /* Value of <expr> FOLLOWING */
int addrNext;
int addrGoto;
int addrTop;
int addrIfPos1;
int addrIfPos2;
assert( pMWin->eStart==TK_PRECEDING
|| pMWin->eStart==TK_CURRENT
|| pMWin->eStart==TK_FOLLOWING
|| pMWin->eStart==TK_UNBOUNDED
);
assert( pMWin->eEnd==TK_FOLLOWING
................................................................................
if( pMWin->eEnd==TK_FOLLOWING ){
addrIfPos1 = sqlite3VdbeAddOp3(v, OP_IfPos, regEnd, 0 , 1);
}
if( pMWin->eStart==TK_FOLLOWING ){
addrIfPos2 = sqlite3VdbeAddOp3(v, OP_IfPos, regStart, 0 , 1);
}
for(pWin=pMWin; pWin; pWin=pWin->pNextWin){
sqlite3VdbeAddOp2(v, OP_Null, 0, pWin->regResult);
sqlite3VdbeAddOp3(v,
OP_AggFinal, pWin->regAccum, pWin->nArg, pWin->regResult
);
sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
}
sqlite3VdbeAddOp2(v, OP_Gosub, regGosub, addrGosub);
sqlite3VdbeAddOp2(v, OP_Next, pMWin->iEphCsr, sqlite3VdbeCurrentAddr(v)+2);
sqlite3VdbeAddOp2(v, OP_Goto, 0, lblFlushDone);
if( pMWin->eStart==TK_FOLLOWING ){
sqlite3VdbeJumpHere(v, addrIfPos2);
}
if( pMWin->eStart==TK_CURRENT
|| pMWin->eStart==TK_PRECEDING
|| pMWin->eStart==TK_FOLLOWING
){
if( pMWin->eStart==TK_PRECEDING ){
addrIfPos2 = sqlite3VdbeAddOp3(v, OP_IfPos, regStart, 0 , 1);
}
sqlite3VdbeAddOp2(v, OP_Next, csrStart, sqlite3VdbeCurrentAddr(v)+1);
windowAggStep(pParse, pMWin, csrStart, 1, reg);
if( pMWin->eStart==TK_PRECEDING ){
sqlite3VdbeJumpHere(v, addrIfPos2);
}
}
if( pMWin->eEnd==TK_FOLLOWING ){
sqlite3VdbeJumpHere(v, addrIfPos1);
}
sqlite3VdbeAddOp2(v, OP_Goto, 0, addrTop);
................................................................................
** if( new partition ){
** AggFinal (xFinalize)
** }
** AggStep
** AggFinal (xValue)
** Gosub addrGosub
** sqlite3WhereEnd()
**
** ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
** ROWS BETWEEN CURRENT ROW AND CURRENT ROW
** ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
**
**========================================================================
**
** ROWS BETWEEN <expr> PRECEDING AND <expr> PRECEDING
**
** Replace the bit after "Rewind" in the above with:
**
** if( (regEnd--)<=0 ){
** AggStep (csr3)
** Next (csr3)
** }
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( (regStart--)<=0 ){
** AggStep (csr2, xInverse)
** Next (csr2)
** }
**
** ROWS BETWEEN <expr> FOLLOWING AND <expr> FOLLOWING
**
** regEnd = regEnd - regStart
** Rewind (csr,csr2,csr3) // if EOF goto flush_partition_done
** Aggstep (csr3)
** Next(csr3) // if EOF fall-through
** if( (regEnd--)<=0 ){
** AggStep (csr2, xInverse)
** Next (csr2)
** if( (regStart--)<=0 ){
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** }
** }
**
** ROWS BETWEEN UNBOUNDED PRECEDING AND <expr> PRECEDING
** ROWS BETWEEN <expr> FOLLOWING AND UNBOUNDED FOLLOWING
**
** Similar to the above, except with regStart or regEnd set to infinity,
** as appropriate.
**
**
**
*/
void sqlite3WindowCodeStep(
Parse *pParse,
Select *p,
WhereInfo *pWInfo,
int regGosub,
int addrGosub,
int *pbLoop
){
Window *pMWin = p->pWin;
if( pMWin->pStart || pMWin->pEnd ){
assert( pMWin->eType==TK_ROWS );
*pbLoop = 0;
windowCodeRowExprStep(pParse, p, pWInfo, regGosub, addrGosub);
return;
}
*pbLoop = 1;
windowCodeDefaultStep(pParse, p, pWInfo, regGosub, addrGosub);
}
|
| > > > > > > > > | | | | | | | | | | | | | | | | | > | > > > > > > > > > > > > > > > > > > > > > > > > > | > | > | | | | < | > | | > < | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | > > > > | > > > | < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < | > > > |
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sqlite3VdbeAddOp3(v, OP_AggStep0, bInverse, reg, pWin->regAccum);
sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
sqlite3VdbeChangeP5(v, (u8)pWin->nArg);
}
}
/*
** ROWS BETWEEN <expr1> PRECEDING AND <expr2> FOLLOWING
** ----------------------------------------------------
**
** Pseudo-code for the implementation of this window frame type is as
** follows. sqlite3WhereBegin() has already been called to generate the
** top of the main loop when this function is called.
**
** Each time the sub-routine at addrGosub is invoked, a single output
** row is generated based on the current row indicated by Window.iEphCsr.
**
** ...
** if( new partition ){
** Gosub flush_partition
** }
** Insert (record in eph-table)
** sqlite3WhereEnd()
** Gosub flush_partition
**
** flush_partition:
** Once {
** OpenDup (iEphCsr -> csrStart)
** OpenDup (iEphCsr -> csrEnd)
** }
** regStart = <expr1> // PRECEDING expression
** regEnd = <expr2> // FOLLOWING expression
** if( regStart<0 || regEnd<0 ){ error! }
** Rewind (csr,csrStart,csrEnd) // if EOF goto flush_partition_done
** Next(csrEnd) // if EOF skip Aggstep
** Aggstep (csrEnd)
** if( (regEnd--)<=0 ){
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( (regStart--)<=0 ){
** AggStep (csrStart, xInverse)
** Next(csrStart)
** }
** }
** flush_partition_done:
** ResetSorter (csr)
** Return
**
** ROWS BETWEEN <expr> PRECEDING AND CURRENT ROW
** ROWS BETWEEN CURRENT ROW AND <expr> FOLLOWING
** ROWS BETWEEN UNBOUNDED PRECEDING AND <expr> FOLLOWING
**
** These are similar to the above. For "CURRENT ROW", intialize the
** register to 0. For "UNBOUNDED PRECEDING" to infinity.
**
** ROWS BETWEEN <expr> PRECEDING AND UNBOUNDED FOLLOWING
** ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
**
** Rewind (csr,csrStart,csrEnd) // if EOF goto flush_partition_done
** while( 1 ){
** Next(csrEnd) // Exit while(1) at EOF
** Aggstep (csrEnd)
** }
** while( 1 ){
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( (regStart--)<=0 ){
** AggStep (csrStart, xInverse)
** Next(csrStart)
** }
** }
**
** For the "CURRENT ROW AND UNBOUNDED FOLLOWING" case, the final if()
** condition is always true (as if regStart were initialized to 0).
**
** RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
**
** This is the only RANGE case handled by this routine. It modifies the
** second while( 1 ) loop in "ROWS BETWEEN CURRENT ... UNBOUNDED..." to
** be:
**
** while( 1 ){
** AggFinal (xValue)
** while( 1 ){
** regPeer++
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( new peer ) break;
** }
** while( (regPeer--)>0 ){
** AggStep (csrStart, xInverse)
** Next(csrStart)
** }
** }
**
** ROWS BETWEEN <expr> FOLLOWING AND <expr> FOLLOWING
**
** regEnd = regEnd - regStart
** Rewind (csr,csrStart,csrEnd) // if EOF goto flush_partition_done
** Aggstep (csrEnd)
** Next(csrEnd) // if EOF fall-through
................................................................................
int regStart; /* Value of <expr> PRECEDING */
int regEnd; /* Value of <expr> FOLLOWING */
int addrNext;
int addrGoto;
int addrTop;
int addrIfPos1;
int addrIfPos2;
int regPeer = 0; /* Number of peers in current group */
int regPeerVal = 0; /* Array of values identifying peer group */
int iPeer = 0; /* Column offset in eph-table of peer vals */
int nPeerVal; /* Number of peer values */
assert( pMWin->eStart==TK_PRECEDING
|| pMWin->eStart==TK_CURRENT
|| pMWin->eStart==TK_FOLLOWING
|| pMWin->eStart==TK_UNBOUNDED
);
assert( pMWin->eEnd==TK_FOLLOWING
................................................................................
if( pMWin->eEnd==TK_FOLLOWING ){
addrIfPos1 = sqlite3VdbeAddOp3(v, OP_IfPos, regEnd, 0 , 1);
}
if( pMWin->eStart==TK_FOLLOWING ){
addrIfPos2 = sqlite3VdbeAddOp3(v, OP_IfPos, regStart, 0 , 1);
}
if( pMWin->eType==TK_RANGE ){
assert( pMWin->eStart==TK_CURRENT && pMWin->pOrderBy );
regPeer = ++pParse->nMem;
regPeerVal = pParse->nMem+1;
iPeer = pMWin->nBufferCol + (pMWin->pPartition?pMWin->pPartition->nExpr:0);
nPeerVal = pMWin->pOrderBy->nExpr;
pParse->nMem += (2 * nPeerVal);
for(k=0; k<nPeerVal; k++){
sqlite3VdbeAddOp3(v, OP_Column, pMWin->iEphCsr, iPeer+k, regPeerVal+k);
}
sqlite3VdbeAddOp2(v, OP_Integer, 0, regPeer);
}
for(pWin=pMWin; pWin; pWin=pWin->pNextWin){
sqlite3VdbeAddOp2(v, OP_Null, 0, pWin->regResult);
sqlite3VdbeAddOp3(v,
OP_AggFinal, pWin->regAccum, pWin->nArg, pWin->regResult
);
sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
}
if( pMWin->eType==TK_RANGE ){
sqlite3VdbeAddOp2(v, OP_AddImm, regPeer, 1);
}
sqlite3VdbeAddOp2(v, OP_Gosub, regGosub, addrGosub);
sqlite3VdbeAddOp2(v, OP_Next, pMWin->iEphCsr, sqlite3VdbeCurrentAddr(v)+2);
sqlite3VdbeAddOp2(v, OP_Goto, 0, lblFlushDone);
if( pMWin->eType==TK_RANGE ){
KeyInfo *pKeyInfo = sqlite3KeyInfoFromExprList(pParse, pMWin->pOrderBy,0,0);
int addrJump = sqlite3VdbeCurrentAddr(v)-4;
for(k=0; k<nPeerVal; k++){
int iOut = regPeerVal + nPeerVal + k;
sqlite3VdbeAddOp3(v, OP_Column, pMWin->iEphCsr, iPeer+k, iOut);
}
sqlite3VdbeAddOp3(v, OP_Compare, regPeerVal, regPeerVal+nPeerVal, nPeerVal);
sqlite3VdbeAppendP4(v, (void*)pKeyInfo, P4_KEYINFO);
addr = sqlite3VdbeCurrentAddr(v)+1;
sqlite3VdbeAddOp3(v, OP_Jump, addr, addrJump, addr);
}
if( pMWin->eStart==TK_FOLLOWING ){
sqlite3VdbeJumpHere(v, addrIfPos2);
}
if( pMWin->eStart==TK_CURRENT
|| pMWin->eStart==TK_PRECEDING
|| pMWin->eStart==TK_FOLLOWING
){
int addrJumpHere = 0;
if( pMWin->eStart==TK_PRECEDING ){
addrJumpHere = sqlite3VdbeAddOp3(v, OP_IfPos, regStart, 0 , 1);
}
if( pMWin->eType==TK_RANGE ){
sqlite3VdbeAddOp3(v, OP_IfPos, regPeer, sqlite3VdbeCurrentAddr(v)+2, 1);
addrJumpHere = sqlite3VdbeAddOp0(v, OP_Goto);
}
sqlite3VdbeAddOp2(v, OP_Next, csrStart, sqlite3VdbeCurrentAddr(v)+1);
windowAggStep(pParse, pMWin, csrStart, 1, reg);
if( pMWin->eType==TK_RANGE ){
sqlite3VdbeAddOp2(v, OP_Goto, 0, addrJumpHere-1);
}
if( addrJumpHere ){
sqlite3VdbeJumpHere(v, addrJumpHere);
}
}
if( pMWin->eEnd==TK_FOLLOWING ){
sqlite3VdbeJumpHere(v, addrIfPos1);
}
sqlite3VdbeAddOp2(v, OP_Goto, 0, addrTop);
................................................................................
** if( new partition ){
** AggFinal (xFinalize)
** }
** AggStep
** AggFinal (xValue)
** Gosub addrGosub
** sqlite3WhereEnd()
**
*/
void sqlite3WindowCodeStep(
Parse *pParse,
Select *p,
WhereInfo *pWInfo,
int regGosub,
int addrGosub,
int *pbLoop
){
Window *pMWin = p->pWin;
if( (pMWin->eType==TK_ROWS
&& (pMWin->eStart!=TK_UNBOUNDED || pMWin->eEnd!=TK_CURRENT))
|| (pMWin->eStart==TK_CURRENT && pMWin->eEnd==TK_UNBOUNDED)
){
*pbLoop = 0;
windowCodeRowExprStep(pParse, p, pWInfo, regGosub, addrGosub);
return;
}
*pbLoop = 1;
windowCodeDefaultStep(pParse, p, pWInfo, regGosub, addrGosub);
}
|
Changes to test/window2.tcl.
283 284 285 286 287 288 289 290 291 292 293 294 295 296 |
execsql_test 2.22 {
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING
) FROM t1
}
==========
puts $::fd finish_test
==========
# execsql_test 3.1 {
# SELECT a, sum(d) OVER (
|
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > |
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execsql_test 2.22 {
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING
) FROM t1
}
execsql_test 2.23 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
}
execsql_test 2.24 {
SELECT a, sum(d) OVER (
PARTITION BY a%2
ORDER BY d
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
}
execsql_test 2.25 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
) FROM t1
}
execsql_test 2.26 {
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
) FROM t1
}
execsql_test 2.27 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND CURRENT ROW
) FROM t1
}
execsql_test 2.28 {
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN CURRENT ROW AND CURRENT ROW
) FROM t1
}
execsql_test 2.29 {
SELECT a, sum(d) OVER (
ORDER BY d
RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
}
execsql_test 2.30 {
SELECT a, sum(d) OVER (
ORDER BY b
RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
}
==========
puts $::fd finish_test
==========
# execsql_test 3.1 {
# SELECT a, sum(d) OVER (
|
Changes to test/window2.test.
195 196 197 198 199 200 201 202 203 204 205 206 207 |
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING
) FROM t1
} {2 10 4 6 6 {} 1 8 3 5 5 {}}
#==========================================================================
finish_test
#==========================================================================
finish_test
|
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > |
195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 |
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING
) FROM t1
} {2 10 4 6 6 {} 1 8 3 5 5 {}}
do_execsql_test 2.23 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
} {1 21 2 20 3 18 4 15 5 11 6 6}
do_execsql_test 2.24 {
SELECT a, sum(d) OVER (
PARTITION BY a%2
ORDER BY d
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
} {2 12 4 10 6 6 1 9 3 8 5 5}
do_execsql_test 2.25 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
) FROM t1
} {1 21 2 21 3 21 4 21 5 21 6 21}
do_execsql_test 2.26 {
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
) FROM t1
} {2 12 4 12 6 12 1 9 3 9 5 9}
do_execsql_test 2.27 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND CURRENT ROW
) FROM t1
} {1 1 2 2 3 3 4 4 5 5 6 6}
do_execsql_test 2.28 {
SELECT a, sum(d) OVER (
PARTITION BY b
ORDER BY d
ROWS BETWEEN CURRENT ROW AND CURRENT ROW
) FROM t1
} {2 2 4 4 6 6 1 1 3 3 5 5}
do_execsql_test 2.29 {
SELECT a, sum(d) OVER (
ORDER BY d
RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
} {1 21 2 20 3 18 4 15 5 11 6 6}
do_execsql_test 2.30 {
SELECT a, sum(d) OVER (
ORDER BY b
RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
} {2 21 4 21 6 21 1 9 3 9 5 9}
#==========================================================================
finish_test
#==========================================================================
finish_test
|