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Overview
| Comment: | Fix a problem with using min() or max() as a window function. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | exp-window-functions |
| Files: | files | file ages | folders |
| SHA3-256: |
801074ce63d3f4825cc9fa508c42629a |
| User & Date: | dan 2018-06-19 17:13:11 |
Context
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2018-06-19
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| 18:11 | Fix a problem caused by a sub-query containing a window function in the FROM clause of a query that itself uses a window function. check-in: f4b1b6f8 user: dan tags: exp-window-functions | |
| 17:13 | Fix a problem with using min() or max() as a window function. check-in: 801074ce user: dan tags: exp-window-functions | |
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2018-06-18
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| 20:34 | Fix problems with using window functions in CREATE VIEW statements. check-in: 943bccd2 user: dan tags: exp-window-functions | |
Changes
Changes to src/func.c.
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Mem *pArg = (Mem *)argv[0]; Mem *pBest; UNUSED_PARAMETER(NotUsed); pBest = (Mem *)sqlite3_aggregate_context(context, sizeof(*pBest)); if( !pBest ) return; if( sqlite3_value_type(argv[0])==SQLITE_NULL ){ if( pBest->flags ) sqlite3SkipAccumulatorLoad(context); }else if( pBest->flags ){ int max; int cmp; CollSeq *pColl = sqlite3GetFuncCollSeq(context); /* This step function is used for both the min() and max() aggregates, ** the only difference between the two being that the sense of the ................................................................................ sqlite3SkipAccumulatorLoad(context); } }else{ pBest->db = sqlite3_context_db_handle(context); sqlite3VdbeMemCopy(pBest, pArg); } } static void minMaxFinalize(sqlite3_context *context){ sqlite3_value *pRes; pRes = (sqlite3_value *)sqlite3_aggregate_context(context, 0); if( pRes ){ if( pRes->flags ){ sqlite3_result_value(context, pRes); } sqlite3VdbeMemRelease(pRes); } } /* ** group_concat(EXPR, ?SEPARATOR?) */ static void groupConcatStep( sqlite3_context *context, ................................................................................ FUNCTION(ltrim, 2, 1, 0, trimFunc ), FUNCTION(rtrim, 1, 2, 0, trimFunc ), FUNCTION(rtrim, 2, 2, 0, trimFunc ), FUNCTION(trim, 1, 3, 0, trimFunc ), FUNCTION(trim, 2, 3, 0, trimFunc ), FUNCTION(min, -1, 0, 1, minmaxFunc ), FUNCTION(min, 0, 0, 1, 0 ), AGGREGATE2(min, 1, 0, 1, minmaxStep, minMaxFinalize, SQLITE_FUNC_MINMAX ), FUNCTION(max, -1, 1, 1, minmaxFunc ), FUNCTION(max, 0, 1, 1, 0 ), AGGREGATE2(max, 1, 1, 1, minmaxStep, minMaxFinalize, SQLITE_FUNC_MINMAX ), FUNCTION2(typeof, 1, 0, 0, typeofFunc, SQLITE_FUNC_TYPEOF), FUNCTION2(length, 1, 0, 0, lengthFunc, SQLITE_FUNC_LENGTH), FUNCTION(instr, 2, 0, 0, instrFunc ), FUNCTION(printf, -1, 0, 0, printfFunc ), FUNCTION(unicode, 1, 0, 0, unicodeFunc ), FUNCTION(char, -1, 0, 0, charFunc ), ................................................................................ VFUNCTION(last_insert_rowid, 0, 0, 0, last_insert_rowid), VFUNCTION(changes, 0, 0, 0, changes ), VFUNCTION(total_changes, 0, 0, 0, total_changes ), FUNCTION(replace, 3, 0, 0, replaceFunc ), FUNCTION(zeroblob, 1, 0, 0, zeroblobFunc ), FUNCTION(substr, 2, 0, 0, substrFunc ), FUNCTION(substr, 3, 0, 0, substrFunc ), WAGGREGATE(sum, 1,0,0, sumStep, sumFinalize, sumFinalize, sumInverse), WAGGREGATE(total, 1,0,0, sumStep, totalFinalize, totalFinalize, sumInverse), WAGGREGATE(avg, 1,0,0, sumStep, avgFinalize, avgFinalize, sumInverse), AGGREGATE2(count, 0,0,0, countStep, countFinalize, SQLITE_FUNC_COUNT ), WAGGREGATE(count, 1,0,0, countStep, countFinalize, 0, 0 ), WAGGREGATE(group_concat, 1, 0, 0, groupConcatStep, groupConcatFinalize, groupConcatValue, groupConcatInverse), WAGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize, groupConcatValue, groupConcatInverse), LIKEFUNC(glob, 2, &globInfo, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), #ifdef SQLITE_CASE_SENSITIVE_LIKE LIKEFUNC(like, 2, &likeInfoAlt, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), LIKEFUNC(like, 3, &likeInfoAlt, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), #else LIKEFUNC(like, 2, &likeInfoNorm, SQLITE_FUNC_LIKE), |
| | | > > > > > > | | | | | | | | |
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Mem *pArg = (Mem *)argv[0]; Mem *pBest; UNUSED_PARAMETER(NotUsed); pBest = (Mem *)sqlite3_aggregate_context(context, sizeof(*pBest)); if( !pBest ) return; if( sqlite3_value_type(pArg)==SQLITE_NULL ){ if( pBest->flags ) sqlite3SkipAccumulatorLoad(context); }else if( pBest->flags ){ int max; int cmp; CollSeq *pColl = sqlite3GetFuncCollSeq(context); /* This step function is used for both the min() and max() aggregates, ** the only difference between the two being that the sense of the ................................................................................ sqlite3SkipAccumulatorLoad(context); } }else{ pBest->db = sqlite3_context_db_handle(context); sqlite3VdbeMemCopy(pBest, pArg); } } static void minMaxValueFinalize(sqlite3_context *context, int bValue){ sqlite3_value *pRes; pRes = (sqlite3_value *)sqlite3_aggregate_context(context, 0); if( pRes ){ if( pRes->flags ){ sqlite3_result_value(context, pRes); } if( bValue==0 ) sqlite3VdbeMemRelease(pRes); } } static void minMaxValue(sqlite3_context *context){ return minMaxValueFinalize(context, 1); } static void minMaxFinalize(sqlite3_context *context){ return minMaxValueFinalize(context, 0); } /* ** group_concat(EXPR, ?SEPARATOR?) */ static void groupConcatStep( sqlite3_context *context, ................................................................................ FUNCTION(ltrim, 2, 1, 0, trimFunc ), FUNCTION(rtrim, 1, 2, 0, trimFunc ), FUNCTION(rtrim, 2, 2, 0, trimFunc ), FUNCTION(trim, 1, 3, 0, trimFunc ), FUNCTION(trim, 2, 3, 0, trimFunc ), FUNCTION(min, -1, 0, 1, minmaxFunc ), FUNCTION(min, 0, 0, 1, 0 ), WAGGREGATE(min, 1, 0, 1, minmaxStep, minMaxFinalize, minMaxValue, 0, SQLITE_FUNC_MINMAX ), FUNCTION(max, -1, 1, 1, minmaxFunc ), FUNCTION(max, 0, 1, 1, 0 ), WAGGREGATE(max, 1, 1, 1, minmaxStep, minMaxFinalize, minMaxValue, 0, SQLITE_FUNC_MINMAX ), FUNCTION2(typeof, 1, 0, 0, typeofFunc, SQLITE_FUNC_TYPEOF), FUNCTION2(length, 1, 0, 0, lengthFunc, SQLITE_FUNC_LENGTH), FUNCTION(instr, 2, 0, 0, instrFunc ), FUNCTION(printf, -1, 0, 0, printfFunc ), FUNCTION(unicode, 1, 0, 0, unicodeFunc ), FUNCTION(char, -1, 0, 0, charFunc ), ................................................................................ VFUNCTION(last_insert_rowid, 0, 0, 0, last_insert_rowid), VFUNCTION(changes, 0, 0, 0, changes ), VFUNCTION(total_changes, 0, 0, 0, total_changes ), FUNCTION(replace, 3, 0, 0, replaceFunc ), FUNCTION(zeroblob, 1, 0, 0, zeroblobFunc ), FUNCTION(substr, 2, 0, 0, substrFunc ), FUNCTION(substr, 3, 0, 0, substrFunc ), WAGGREGATE(sum, 1,0,0, sumStep, sumFinalize, sumFinalize, sumInverse, 0), WAGGREGATE(total, 1,0,0, sumStep,totalFinalize,totalFinalize,sumInverse, 0), WAGGREGATE(avg, 1,0,0, sumStep, avgFinalize, avgFinalize, sumInverse, 0), AGGREGATE2(count, 0,0,0, countStep, countFinalize, SQLITE_FUNC_COUNT ), WAGGREGATE(count, 1,0,0, countStep, countFinalize, 0, 0, 0 ), WAGGREGATE(group_concat, 1, 0, 0, groupConcatStep, groupConcatFinalize, groupConcatValue, groupConcatInverse, 0), WAGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize, groupConcatValue, groupConcatInverse, 0), LIKEFUNC(glob, 2, &globInfo, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), #ifdef SQLITE_CASE_SENSITIVE_LIKE LIKEFUNC(like, 2, &likeInfoAlt, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), LIKEFUNC(like, 3, &likeInfoAlt, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE), #else LIKEFUNC(like, 2, &likeInfoNorm, SQLITE_FUNC_LIKE), |
Changes to src/sqliteInt.h.
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#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,0,#zName, {0}}
#define AGGREGATE2(zName, nArg, arg, nc, xStep, xFinal, extraFlags) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|extraFlags, \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xFinal,0,#zName, {0}}
#define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}}
/*
** All current savepoints are stored in a linked list starting at
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
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#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,0,#zName, {0}}
#define AGGREGATE2(zName, nArg, arg, nc, xStep, xFinal, extraFlags) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|extraFlags, \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xFinal,0,#zName, {0}}
#define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \
{nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \
SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}}
/*
** All current savepoints are stored in a linked list starting at
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
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Changes to test/window1.test.
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4 6 8 6 8 10 8 10 default 10 {} default {} {} default
}
do_execsql_test 7.3 {
SELECT row_number() OVER (ORDER BY x) FROM t1
} {1 2 3 4 5}
breakpoint
do_execsql_test 7.4 {
SELECT
row_number() OVER win,
lead(x) OVER win
FROM t1
WINDOW win AS (ORDER BY x ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
} {1 3 2 5 3 7 4 9 5 {}}
................................................................................
do_execsql_test 8.2.1 {
SELECT * FROM v1
} {1 1 1 3 1 2 6 1 3 10 1 4 15 1 5 21 1 6}
do_execsql_test 8.2.2 {
SELECT * FROM v2
} {1 1 1 3 1 2 6 1 3 10 1 4 15 1 5 21 1 6}
finish_test
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4 6 8 6 8 10 8 10 default 10 {} default {} {} default
}
do_execsql_test 7.3 {
SELECT row_number() OVER (ORDER BY x) FROM t1
} {1 2 3 4 5}
do_execsql_test 7.4 {
SELECT
row_number() OVER win,
lead(x) OVER win
FROM t1
WINDOW win AS (ORDER BY x ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
} {1 3 2 5 3 7 4 9 5 {}}
................................................................................
do_execsql_test 8.2.1 {
SELECT * FROM v1
} {1 1 1 3 1 2 6 1 3 10 1 4 15 1 5 21 1 6}
do_execsql_test 8.2.2 {
SELECT * FROM v2
} {1 1 1 3 1 2 6 1 3 10 1 4 15 1 5 21 1 6}
#-------------------------------------------------------------------------
# Attempt to use a window function in a trigger.
#
do_execsql_test 9.0 {
CREATE TABLE t4(x, y);
INSERT INTO t4 VALUES(1, 'g');
INSERT INTO t4 VALUES(2, 'i');
INSERT INTO t4 VALUES(3, 'l');
INSERT INTO t4 VALUES(4, 'g');
INSERT INTO t4 VALUES(5, 'a');
CREATE TABLE t5(x, y, m);
CREATE TRIGGER t4i AFTER INSERT ON t4 BEGIN
DELETE FROM t5;
INSERT INTO t5
SELECT x, y, max(y) OVER xyz FROM t4
WINDOW xyz AS (PARTITION BY (x%2) ORDER BY x);
END;
}
do_execsql_test 9.1.1 {
SELECT x, y, max(y) OVER xyz FROM t4
WINDOW xyz AS (PARTITION BY (x%2) ORDER BY x) ORDER BY 1
} {1 g g 2 i i 3 l l 4 g i 5 a l}
do_execsql_test 9.1.2 {
INSERT INTO t4 VALUES(6, 'm');
SELECT x, y, max(y) OVER xyz FROM t4
WINDOW xyz AS (PARTITION BY (x%2) ORDER BY x) ORDER BY 1
} {1 g g 2 i i 3 l l 4 g i 5 a l 6 m m}
do_execsql_test 9.1.3 {
SELECT * FROM t5 ORDER BY 1
} {1 g g 2 i i 3 l l 4 g i 5 a l 6 m m}
finish_test
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