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Overview
| Comment: | Return an error if DISTINCT is used with a window-function (e.g. "count(DISTINCT <expr>) OVER (...)"). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
d59bcc8eea4fcf0ee3c2263d31ee42f9 |
| User & Date: | dan 2018-07-06 07:42:42 |
| Original Comment: | Return an error if DISTINCT is used with a window-function (.i.e. "count(DISTINCT <expr>) OVER (...)". |
Context
|
2018-07-06
| ||
| 13:25 | Remove some bad assert() statements from the implementations of window functions percent_rank() and cume_dist(). (check-in: 443f0c28 user: dan tags: trunk) | |
| 07:42 | Return an error if DISTINCT is used with a window-function (e.g. "count(DISTINCT <expr>) OVER (...)"). (check-in: d59bcc8e user: dan tags: trunk) | |
|
2018-07-05
| ||
| 21:22 | Use separate opcodes, OP_AggValue and OP_AggInverse, for the new callbacks associated with Window Functions, for improved readability of EXPLAIN output. (check-in: fa653805 user: drh tags: trunk) | |
Changes
Changes to src/parse.y.
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over_opt(Z)
%endif
. {
if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X);
}
A = sqlite3ExprFunction(pParse, Y, &X);
sqlite3WindowAttach(pParse, A, Z);
if( D==SF_Distinct && A ){
A->flags |= EP_Distinct;
}
}
expr(A) ::= id(X) LP STAR RP
%ifndef SQLITE_OMIT_WINDOWFUNC
over_opt(Z)
%endif
. {
A = sqlite3ExprFunction(pParse, 0, &X);
|
< > |
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 |
over_opt(Z)
%endif
. {
if( Y && Y->nExpr>pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
sqlite3ErrorMsg(pParse, "too many arguments on function %T", &X);
}
A = sqlite3ExprFunction(pParse, Y, &X);
if( D==SF_Distinct && A ){
A->flags |= EP_Distinct;
}
sqlite3WindowAttach(pParse, A, Z);
}
expr(A) ::= id(X) LP STAR RP
%ifndef SQLITE_OMIT_WINDOWFUNC
over_opt(Z)
%endif
. {
A = sqlite3ExprFunction(pParse, 0, &X);
|
Changes to src/window.c.
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}
/*
** Attach window object pWin to expression p.
*/
void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
if( p ){
p->pWin = pWin;
if( pWin ) pWin->pOwner = p;
}else{
sqlite3WindowDelete(pParse->db, pWin);
}
}
/*
** Return 0 if the two window objects are identical, or non-zero otherwise.
|
> | | > > > > |
863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 |
}
/*
** Attach window object pWin to expression p.
*/
void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
if( p ){
if( pWin ){
p->pWin = pWin;
pWin->pOwner = p;
if( p->flags & EP_Distinct ){
sqlite3ErrorMsg(pParse,"DISTINCT is not supported for window functions");
}
}
}else{
sqlite3WindowDelete(pParse->db, pWin);
}
}
/*
** Return 0 if the two window objects are identical, or non-zero otherwise.
|
Changes to test/window6.test.
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1 1 2 1,2 3 1,2,3 4 2,3,4 5 3,4,5
}
do_catchsql_test 9.1 {
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
SELECT x, group_concat(x) OVER (ORDER BY x RANGE 2 PRECEDING)
FROM c;
} {1 {RANGE PRECEDING is only supported with UNBOUNDED}}
do_catchsql_test 9.2 {
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
SELECT x, group_concat(x) OVER (ORDER BY x RANGE BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING)
FROM c;
} {1 {RANGE FOLLOWING is only supported with UNBOUNDED}}
finish_test
|
> > > > > > |
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1 1 2 1,2 3 1,2,3 4 2,3,4 5 3,4,5
}
do_catchsql_test 9.1 {
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
SELECT x, group_concat(x) OVER (ORDER BY x RANGE 2 PRECEDING)
FROM c;
} {1 {RANGE PRECEDING is only supported with UNBOUNDED}}
do_catchsql_test 9.2 {
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
SELECT x, group_concat(x) OVER (ORDER BY x RANGE BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING)
FROM c;
} {1 {RANGE FOLLOWING is only supported with UNBOUNDED}}
do_catchsql_test 9.3 {
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<5)
SELECT count(DISTINCT x) OVER (ORDER BY x) FROM c;
} {1 {DISTINCT is not supported for window functions}}
finish_test
|