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Make OVERLAPS operators conform to SQL92 spec regarding NULL handling.

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As I read it, the spec requires a non-null result in some cases where
one of the inputs is NULL: specifically, if the other endpoint of that
interval is between the endpoints of the other interval, then the result
is known TRUE despite the missing endpoint.  The spec could've been a
lot simpler if they did not intend this behavior.
I did not force an initdb for this change, but if you don't do one you'll
still see the old strict-function behavior.
This commit is contained in:
Tom Lane
2000-12-07 18:38:59 +00:00
parent 8bb4dab94d
commit 821f4673ff
3 changed files with 297 additions and 73 deletions
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20
src/include/catalog/pg_proc.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pg_proc.h,v 1.176 2000/12/03 14:51:09 thomas Exp $
* $Id: pg_proc.h,v 1.177 2000/12/07 18:38:58 tgl Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
@ -1510,7 +1510,7 @@ DESCR("absolute value");
DATA(insert OID = 1263 ( interval PGUID 12 f t f t 1 f 1186 "25" 100 0 0 100 text_interval - ));
DESCR("convert text to interval");
DATA(insert OID = 1271 ( overlaps PGUID 12 f t t t 4 f 16 "1266 1266 1266 1266" 100 0 0 100 overlaps_timetz - ));
DATA(insert OID = 1271 ( overlaps PGUID 12 f t t f 4 f 16 "1266 1266 1266 1266" 100 0 0 100 overlaps_timetz - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1272 ( datetime_pl PGUID 12 f t f t 2 f 1184 "1082 1083" 100 0 0 100 datetime_timestamp - ));
DESCR("convert date and time to timestamp");
@ -1569,22 +1569,22 @@ DESCR("restriction selectivity for containment comparison operators");
DATA(insert OID = 1303 ( contjoinsel PGUID 12 f t f t 5 f 701 "26 26 21 26 21" 100 0 0 100 contjoinsel - ));
DESCR("join selectivity for containment comparison operators");
DATA(insert OID = 1304 ( overlaps PGUID 12 f t t t 4 f 16 "1184 1184 1184 1184" 100 0 0 100 overlaps_timestamp - ));
DATA(insert OID = 1304 ( overlaps PGUID 12 f t t f 4 f 16 "1184 1184 1184 1184" 100 0 0 100 overlaps_timestamp - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1305 ( overlaps PGUID 14 f t t t 4 f 16 "1184 1186 1184 1186" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, ($3 + $4))" - ));
DATA(insert OID = 1305 ( overlaps PGUID 14 f t t f 4 f 16 "1184 1186 1184 1186" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, ($3 + $4))" - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1306 ( overlaps PGUID 14 f t t t 4 f 16 "1184 1184 1184 1186" 100 0 0 100 "select ($1, $2) overlaps ($3, ($3 + $4))" - ));
DATA(insert OID = 1306 ( overlaps PGUID 14 f t t f 4 f 16 "1184 1184 1184 1186" 100 0 0 100 "select ($1, $2) overlaps ($3, ($3 + $4))" - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1307 ( overlaps PGUID 14 f t t t 4 f 16 "1184 1186 1184 1184" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, $4)" - ));
DATA(insert OID = 1307 ( overlaps PGUID 14 f t t f 4 f 16 "1184 1186 1184 1184" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, $4)" - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1308 ( overlaps PGUID 12 f t t t 4 f 16 "1083 1083 1083 1083" 100 0 0 100 overlaps_time - ));
DATA(insert OID = 1308 ( overlaps PGUID 12 f t t f 4 f 16 "1083 1083 1083 1083" 100 0 0 100 overlaps_time - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1309 ( overlaps PGUID 14 f t t t 4 f 16 "1083 1186 1083 1186" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, ($3 + $4))" - ));
DATA(insert OID = 1309 ( overlaps PGUID 14 f t t f 4 f 16 "1083 1186 1083 1186" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, ($3 + $4))" - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1310 ( overlaps PGUID 14 f t t t 4 f 16 "1083 1083 1083 1186" 100 0 0 100 "select ($1, $2) overlaps ($3, ($3 + $4))" - ));
DATA(insert OID = 1310 ( overlaps PGUID 14 f t t f 4 f 16 "1083 1083 1083 1186" 100 0 0 100 "select ($1, $2) overlaps ($3, ($3 + $4))" - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1311 ( overlaps PGUID 14 f t t t 4 f 16 "1083 1186 1083 1083" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, $4)" - ));
DATA(insert OID = 1311 ( overlaps PGUID 14 f t t f 4 f 16 "1083 1186 1083 1083" 100 0 0 100 "select ($1, ($1 + $2)) overlaps ($3, $4)" - ));
DESCR("SQL92 interval comparison");
DATA(insert OID = 1314 ( timestamp_cmp PGUID 12 f t f t 2 f 23 "1184 1184" 100 0 0 100 timestamp_cmp - ));