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Support other frame types that use "<expr> PRECEDING" or "<expr> FOLLOWING" as

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start or end conditions.

FossilOrigin-Name: ec7b648c7f0ee266653561bbb9daa45b9be0d8a1a14f11dc93bce467c35154e6
This commit is contained in:
dan 2018-05-24 17:49:14 +00:00
parent c3a20c19a8
commit 99652dda3c
5 changed files with 183 additions and 91 deletions
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16
manifest
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@ -1,5 +1,5 @@
C Add\ssupport\sfor\s"ROWS\sBETWEEN\s<expr>\sPRECEDING\sAND\s<expr>\sFOLLOWING"\swindow\nframes.
D 2018-05-23T20:55:37.621
C Support\sother\sframe\stypes\sthat\suse\s"<expr>\sPRECEDING"\sor\s"<expr>\sFOLLOWING"\sas\nstart\sor\send\sconditions.
D 2018-05-24T17:49:14.994
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F Makefile.in bfc40f350586923e0419d2ea4b559c37ec10ee4b6e210e08c14401f8e340f0da
@ -582,7 +582,7 @@ F src/where.c 60ec752fcbe9f9e0271ac60548d159a540a1ee47a4f9fedc85e88a3d0e392dd1
F src/whereInt.h cbae2bcd37cfebdb7812a8b188cdb19634ced2b9346470d1c270556b0c33ea53
F src/wherecode.c 728c7f70731430ccdac807a79969873e1af6968bf1c4745dff3f9dd35f636cc8
F src/whereexpr.c e90b2e76dcabc81edff56633bf281bc01d93b71e0c81482dc06925ce39f5844a
F src/window.c 1313e941d1e50a44594e6f3e12bc7d0fe6f092ea35c1f3884c31bd224ba66d29
F src/window.c dc58ad62f2bb06d2e289ce65375b7d0047646b73c11a09fb0325febac0aebba7
F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
F test/affinity2.test a6d901b436328bd67a79b41bb0ac2663918fe3bd
F test/affinity3.test 6a101af2fc945ce2912f6fe54dd646018551710d
@ -1615,8 +1615,8 @@ F test/win32lock.test fbf107c91d8f5512be5a5b87c4c42ab9fdd54972
F test/win32longpath.test 169c75a3b2e43481f4a62122510210c67b08f26d
F test/win32nolock.test ac4f08811a562e45a5755e661f45ca85892bdbbc
F test/window1.test 5705337783d220b47f6fb4432264543b7557a05be8013d772f57d71f2fded271
F test/window2.tcl 29e9bb16a52eb1e9e8f376519185af5c64eed88a8e6f0bee54237ba2971803a7
F test/window2.test f580e1cc96d1ccb6bb220d1e338525ee5541e45e2206ed9ca74417ba862d8a62
F test/window2.tcl 798cfc8bef0f08a27a0ba64e147d8c72e9409c1673cc4ccff2ee7f150aa084e4
F test/window2.test ca65b0818ddc948a7b0b07ee16a3c489dafcb958203bf8b75356eacd4696a206
F test/with1.test 58475190cd8caaeebea8cfeb2a264ec97a0c492b8ffe9ad20cefbb23df462f96
F test/with2.test e0030e2f0267a910d6c0e4f46f2dfe941c1cc0d4f659ba69b3597728e7e8f1ab
F test/with3.test 5e8ce2c585170bbbc0544e2a01a4941fa0be173ba5265e5c92eb588cd99a232d
@ -1733,7 +1733,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P cdb68d2c64e453fdcd29437d5915c5c5ab6fbc7b5ffac52f4cb393f35b4a0124
R 20d653691e285483f3e3bdb0b082aa4b
P 3a203660f1e4da3b8d2d605c494f4843f6e00752f28042b49e11d7d6550dd406
R 91a6e47e9aa2b2bca4e7ec8da35f9bee
U dan
Z e628ea8085262c078f67c7957c5a3c95
Z 468858d850092ff66af7324bc283099f

2
manifest.uuid
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@ -1 +1 @@
3a203660f1e4da3b8d2d605c494f4843f6e00752f28042b49e11d7d6550dd406
ec7b648c7f0ee266653561bbb9daa45b9be0d8a1a14f11dc93bce467c35154e6

131
src/window.c
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@ -93,6 +93,50 @@ static void windowCheckFrameValue(Parse *pParse, int reg, int bEnd){
sqlite3VdbeAppendP4(v, (void*)azErr[bEnd], P4_STATIC);
}
/*
** ROWS BETWEEN <expr> PRECEDING AND <expr> FOLLOWING
**
** ...
** if( new partition ){
** Gosub flush_partition
** }
** Insert (record in eph-table)
** sqlite3WhereEnd()
** Gosub flush_partition
**
** flush_partition:
** OpenDup (csr -> csr2)
** OpenDup (csr -> csr3)
** regPrec = <expr1> // PRECEDING expression
** regFollow = <expr2> // FOLLOWING expression
** if( regPrec<0 || regFollow<0 ) throw exception!
** Rewind (csr,csr2,csr3) // if EOF goto flush_partition_done
** Aggstep (csr3)
** Next(csr3) // if EOF fall-through
** if( (regFollow--)<=0 ){
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( (regPrec--)<=0 ){
** AggStep (csr2, xInverse)
** Next(csr2)
** }
** }
** flush_partition_done:
** Close (csr2)
** Close (csr3)
** 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.
**
*/
static void windowCodeRowExprStep(
Parse *pParse,
Select *p,
@ -123,6 +167,15 @@ static void windowCodeRowExprStep(
int addrIfPos1;
int addrIfPos2;
assert( pMWin->eStart==TK_PRECEDING
|| pMWin->eStart==TK_CURRENT
|| pMWin->eStart==TK_UNBOUNDED
);
assert( pMWin->eEnd==TK_FOLLOWING
|| pMWin->eEnd==TK_CURRENT
|| pMWin->eEnd==TK_UNBOUNDED
);
pParse->nMem += nSub + 2;
/* Allocate register and label for the "flush_partition" sub-routine. */
@ -173,17 +226,22 @@ static void windowCodeRowExprStep(
sqlite3VdbeAddOp2(v, OP_OpenDup, csrPrec, pMWin->iEphCsr);
sqlite3VdbeAddOp2(v, OP_OpenDup, csrFollow, pMWin->iEphCsr);
/* If either regPrec or regFollow are not non-negative integers, throw
** an exception. */
if( pMWin->pStart ){
assert( pMWin->eStart==TK_PRECEDING );
sqlite3ExprCode(pParse, pMWin->pStart, regPrec);
windowCheckFrameValue(pParse, regPrec, 0);
}
if( pMWin->pEnd ){
assert( pMWin->eEnd==TK_FOLLOWING );
sqlite3ExprCode(pParse, pMWin->pEnd, regFollow);
windowCheckFrameValue(pParse, regFollow, 1);
}
sqlite3VdbeAddOp2(v, OP_Null, 0, pMWin->regResult);
sqlite3VdbeAddOp2(v, OP_Null, 0, pMWin->regAccum);
/* If either regPrec or regFollow are not non-negative integers, throw an
** exception. */
windowCheckFrameValue(pParse, regPrec, 0);
windowCheckFrameValue(pParse, regFollow, 1);
sqlite3VdbeAddOp2(v, OP_Rewind, pMWin->iEphCsr, addrDone);
sqlite3VdbeAddOp2(v, OP_Rewind, csrPrec, addrDone);
sqlite3VdbeChangeP5(v, 1);
@ -205,9 +263,17 @@ static void windowCodeRowExprStep(
sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
sqlite3VdbeChangeP5(v, (u8)pWin->nArg);
}
if( pMWin->eEnd==TK_UNBOUNDED ){
sqlite3VdbeAddOp2(v, OP_Goto, 0, addrNext);
sqlite3VdbeJumpHere(v, addrNext+1);
addrNext = sqlite3VdbeCurrentAddr(v);
}else{
sqlite3VdbeJumpHere(v, addrNext+1);
}
if( pMWin->eEnd==TK_FOLLOWING ){
addrIfPos1 = sqlite3VdbeAddOp3(v, OP_IfPos, regFollow, 0 , 1);
}
for(pWin=pMWin; pWin; pWin=pWin->pNextWin){
sqlite3VdbeAddOp3(v,
OP_AggFinal, pWin->regAccum, pWin->nArg, pWin->regResult
@ -218,7 +284,10 @@ static void windowCodeRowExprStep(
sqlite3VdbeAddOp2(v, OP_Next, pMWin->iEphCsr, sqlite3VdbeCurrentAddr(v)+2);
sqlite3VdbeAddOp2(v, OP_Goto, 0, addrDone);
if( pMWin->eStart==TK_CURRENT || pMWin->eStart==TK_PRECEDING ){
if( pMWin->eStart==TK_PRECEDING ){
addrIfPos2 = sqlite3VdbeAddOp3(v, OP_IfPos, regPrec, 0 , 1);
}
sqlite3VdbeAddOp2(v, OP_Next, csrPrec, sqlite3VdbeCurrentAddr(v)+1);
for(pWin=pMWin; pWin; pWin=pWin->pNextWin){
int i;
@ -229,9 +298,13 @@ static void windowCodeRowExprStep(
sqlite3VdbeAppendP4(v, pWin->pFunc, P4_FUNCDEF);
sqlite3VdbeChangeP5(v, (u8)pWin->nArg);
}
if( pMWin->eStart==TK_PRECEDING ){
sqlite3VdbeJumpHere(v, addrIfPos2);
}
}
if( pMWin->eEnd==TK_FOLLOWING ){
sqlite3VdbeJumpHere(v, addrIfPos1);
}
sqlite3VdbeAddOp2(v, OP_Goto, 0, addrNext);
/* flush_partition_done: */
@ -428,48 +501,6 @@ static void windowCodeDefaultStep(
**
**========================================================================
**
** ROWS BETWEEN <expr> PRECEDING AND <expr> FOLLOWING
**
** ...
** if( new partition ){
** Gosub flush_partition
** }
** Insert (record in eph-table)
** sqlite3WhereEnd()
** Gosub flush_partition
**
** flush_partition:
** OpenDup (csr -> csr2)
** OpenDup (csr -> csr3)
** regPrec = <expr1> // PRECEDING expression
** regFollow = <expr2> // FOLLOWING expression
** if( regPrec<0 || regFollow<0 ) throw exception!
** Rewind (csr,csr2,csr3) // if EOF goto flush_partition_done
** Aggstep (csr3)
** Next(csr3) // if EOF fall-through
** if( (regFollow--)<=0 ){
** AggFinal (xValue)
** Gosub addrGosub
** Next(csr) // if EOF goto flush_partition_done
** if( (regPrec--)<=0 ){
** AggStep (csr2, xInverse)
** Next(csr2)
** }
** }
** flush_partition_done:
** Close (csr2)
** Close (csr3)
** 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> PRECEDING AND <expr> PRECEDING
**
** Replace the bit after "Rewind" in the above with:
@ -522,8 +553,8 @@ void sqlite3WindowCodeStep(
Window *pMWin = p->pWin;
if( pMWin->eType==TK_ROWS
&& pMWin->eStart==TK_PRECEDING
&& pMWin->eEnd==TK_FOLLOWING
&& (pMWin->eStart==TK_PRECEDING || pMWin->eEnd==TK_FOLLOWING)
&& (pMWin->eStart!=TK_FOLLOWING || pMWin->eEnd==TK_PRECEDING)
){
*pbLoop = 0;
windowCodeRowExprStep(pParse, p, pWInfo, regGosub, addrGosub);

38
test/window2.tcl
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@ -184,6 +184,44 @@ execsql_test 2.7 {
) FROM t1
}
execsql_test 2.8 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND 2 FOLLOWING
) FROM t1
}
execsql_test 2.9 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING
) FROM t1
}
execsql_test 2.10 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND 2 FOLLOWING
) FROM t1
}
execsql_test 2.11 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
) FROM t1
}
execsql_test 2.13 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN 2 PRECEDING AND UNBOUNDED FOLLOWING
) FROM t1
}
==========
puts $::fd finish_test
==========

57
test/window2.test
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@ -95,42 +95,65 @@ do_execsql_test 2.7 {
) FROM t1
} {2 2 4 4 6 6 1 1 3 3 5 5}
do_execsql_test 2.8 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND 2 FOLLOWING
) FROM t1
} {1 6 2 9 3 12 4 15 5 11 6 6}
do_execsql_test 2.9 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING
) FROM t1
} {1 6 2 10 3 15 4 21 5 21 6 21}
do_execsql_test 2.10 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN CURRENT ROW AND 2 FOLLOWING
) FROM t1
} {1 6 2 9 3 12 4 15 5 11 6 6}
do_execsql_test 2.11 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
) FROM t1
} {1 1 2 3 3 6 4 9 5 12 6 15}
do_execsql_test 2.13 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN 2 PRECEDING AND UNBOUNDED FOLLOWING
) FROM t1
} {1 21 2 21 3 21 4 20 5 18 6 15}
#==========================================================================
finish_test
#==========================================================================
do_execsql_test 2.1 {
do_execsql_test 3.1 {
SELECT a, sum(d) OVER (
PARTITION BY b ORDER BY d
RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
) FROM t1
} {2 12 4 10 6 6 1 9 3 8 5 5}
do_execsql_test 2.2 {
do_execsql_test 3.2 {
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}
do_execsql_test 2.3 {
do_execsql_test 3.3 {
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 2.4 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING
) FROM t1
} {1 3 2 6 3 9 4 12 5 15 6 11}
do_execsql_test 2.5 {
SELECT a, sum(d) OVER (
ORDER BY d
ROWS BETWEEN 1 PRECEDING AND 1 PRECEDING
) FROM t1
} {1 {} 2 1 3 2 4 3 5 4 6 5}
finish_test