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Overview
| Comment: | Fix a problem with handling single row partitions in the percent_rank() window function. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | exp-window-functions |
| Files: | files | file ages | folders |
| SHA3-256: |
b84fbf16eac718c151731e2b2dcc73f2 |
| User & Date: | dan 2018-06-21 19:20:39 |
Context
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2018-06-22
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| 17:57 | Merge latest trunk changes. (check-in: ebe65b23 user: dan tags: exp-window-functions) | |
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2018-06-21
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| 19:20 | Fix a problem with handling single row partitions in the percent_rank() window function. (check-in: b84fbf16 user: dan tags: exp-window-functions) | |
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2018-06-20
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| 09:23 | Add tests to improve coverage of code in window.c. Fix a problem with "SELECT row_number() OVER ()". (check-in: f41b6b73 user: dan tags: exp-window-functions) | |
Changes
Changes to src/window.c.
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struct CallCount *p;
p = (struct CallCount*)sqlite3_aggregate_context(pCtx, sizeof(*p));
if( p ){
if( p->nTotal>1 ){
double r = (double)(p->nValue-1) / (double)(p->nTotal-1);
sqlite3_result_double(pCtx, r);
}else{
sqlite3_result_double(pCtx, 100.0);
}
p->nValue = 0;
}
}
/*
** Implementation of built-in window function cume_dist(). Assumes that
|
| |
275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 |
struct CallCount *p;
p = (struct CallCount*)sqlite3_aggregate_context(pCtx, sizeof(*p));
if( p ){
if( p->nTotal>1 ){
double r = (double)(p->nValue-1) / (double)(p->nTotal-1);
sqlite3_result_double(pCtx, r);
}else{
sqlite3_result_double(pCtx, 0.0);
}
p->nValue = 0;
}
}
/*
** Implementation of built-in window function cume_dist(). Assumes that
|
Changes to test/window4.tcl.
300 301 302 303 304 305 306 307 308 309 |
lead(d) OVER win,
lag(d) OVER win,
max(d) OVER win,
min(d) OVER win
FROM t1
WINDOW win AS (ORDER BY a)
}
finish_test
|
> > > > > > > > > > > > > > > > > > |
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 |
lead(d) OVER win,
lag(d) OVER win,
max(d) OVER win,
min(d) OVER win
FROM t1
WINDOW win AS (ORDER BY a)
}
==========
execsql_test 9.0 {
DROP TABLE IF EXISTS t2;
CREATE TABLE t2(x INTEGER);
INSERT INTO t2 VALUES(1), (1), (1), (4), (4), (6), (7);
}
execsql_test 9.1 {
SELECT rank() OVER () FROM t2
}
execsql_test 9.2 {
SELECT dense_rank() OVER (PARTITION BY x) FROM t2
}
execsql_float_test 9.3 {
SELECT x, percent_rank() OVER (PARTITION BY x ORDER BY x) FROM t2
}
finish_test
|
Changes to test/window4.test.
1195 1196 1197 1198 1199 1200 1201 1202 1203 |
lead(d) OVER win,
lag(d) OVER win,
max(d) OVER win,
min(d) OVER win
FROM t1
WINDOW win AS (ORDER BY a)
} {1 1 1 1 4 4 {} 8 {} 4 4 2 2 2 1 4 8 8 12 4 8 4 3 3 3 2 4 12 8 {} 8 12 4}
finish_test
|
> > > > > > > > > > > > > > > > > > > > > > > > |
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 |
lead(d) OVER win,
lag(d) OVER win,
max(d) OVER win,
min(d) OVER win
FROM t1
WINDOW win AS (ORDER BY a)
} {1 1 1 1 4 4 {} 8 {} 4 4 2 2 2 1 4 8 8 12 4 8 4 3 3 3 2 4 12 8 {} 8 12 4}
#==========================================================================
do_execsql_test 9.0 {
DROP TABLE IF EXISTS t2;
CREATE TABLE t2(x INTEGER);
INSERT INTO t2 VALUES(1), (1), (1), (4), (4), (6), (7);
} {}
do_execsql_test 9.1 {
SELECT rank() OVER () FROM t2
} {1 1 1 1 1 1 1}
do_execsql_test 9.2 {
SELECT dense_rank() OVER (PARTITION BY x) FROM t2
} {1 1 1 1 1 1 1}
do_test 9.3 {
set myres {}
foreach r [db eval {SELECT x, percent_rank() OVER (PARTITION BY x ORDER BY x) FROM t2}] {
lappend myres [format %.2f [set r]]
}
set myres
} {1.00 0.00 1.00 0.00 1.00 0.00 4.00 0.00 4.00 0.00 6.00 0.00 7.00 0.00}
finish_test
|