mirror of https://github.com/postgres/postgres
locale, which sorts a bit differently. Per recent gripe from Magnus.REL8_3_STABLE
Tom Lane
18 years ago
parent
654dcfb9e4
commit
0833081125
@ -0,0 +1,770 @@ |
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-- |
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-- SELECT |
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-- |
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-- btree index |
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-- awk '{if($1<10){print;}else{next;}}' onek.data | sort +0n -1 |
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-- |
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SELECT * FROM onek |
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WHERE onek.unique1 < 10 |
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ORDER BY onek.unique1; |
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4 |
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+--------- |
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0 | 998 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | AAAAAA | KMBAAA | OOOOxx |
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1 | 214 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | BAAAAA | GIAAAA | OOOOxx |
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2 | 326 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 5 | CAAAAA | OMAAAA | OOOOxx |
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3 | 431 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 7 | DAAAAA | PQAAAA | VVVVxx |
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4 | 833 | 0 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 8 | 9 | EAAAAA | BGBAAA | HHHHxx |
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5 | 541 | 1 | 1 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 10 | 11 | FAAAAA | VUAAAA | HHHHxx |
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6 | 978 | 0 | 2 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 12 | 13 | GAAAAA | QLBAAA | OOOOxx |
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7 | 647 | 1 | 3 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 14 | 15 | HAAAAA | XYAAAA | VVVVxx |
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8 | 653 | 0 | 0 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 16 | 17 | IAAAAA | DZAAAA | HHHHxx |
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9 | 49 | 1 | 1 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 18 | 19 | JAAAAA | XBAAAA | HHHHxx |
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(10 rows) |
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|
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-- |
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-- awk '{if($1<20){print $1,$14;}else{next;}}' onek.data | sort +0nr -1 |
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-- |
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SELECT onek.unique1, onek.stringu1 FROM onek |
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WHERE onek.unique1 < 20 |
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ORDER BY unique1 using >; |
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unique1 | stringu1 |
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---------+---------- |
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19 | TAAAAA |
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18 | SAAAAA |
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17 | RAAAAA |
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16 | QAAAAA |
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15 | PAAAAA |
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14 | OAAAAA |
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13 | NAAAAA |
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12 | MAAAAA |
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11 | LAAAAA |
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10 | KAAAAA |
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9 | JAAAAA |
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8 | IAAAAA |
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7 | HAAAAA |
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6 | GAAAAA |
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5 | FAAAAA |
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4 | EAAAAA |
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3 | DAAAAA |
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2 | CAAAAA |
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1 | BAAAAA |
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0 | AAAAAA |
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(20 rows) |
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|
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-- |
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-- awk '{if($1>980){print $1,$14;}else{next;}}' onek.data | sort +1d -2 |
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-- |
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SELECT onek.unique1, onek.stringu1 FROM onek |
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WHERE onek.unique1 > 980 |
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ORDER BY stringu1 using <; |
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unique1 | stringu1 |
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---------+---------- |
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988 | AMAAAA |
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989 | BMAAAA |
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990 | CMAAAA |
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991 | DMAAAA |
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992 | EMAAAA |
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993 | FMAAAA |
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994 | GMAAAA |
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995 | HMAAAA |
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996 | IMAAAA |
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997 | JMAAAA |
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998 | KMAAAA |
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999 | LMAAAA |
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981 | TLAAAA |
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982 | ULAAAA |
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983 | VLAAAA |
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984 | WLAAAA |
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985 | XLAAAA |
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986 | YLAAAA |
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987 | ZLAAAA |
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(19 rows) |
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|
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|
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-- |
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-- awk '{if($1>980){print $1,$16;}else{next;}}' onek.data | |
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-- sort +1d -2 +0nr -1 |
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-- |
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SELECT onek.unique1, onek.string4 FROM onek |
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WHERE onek.unique1 > 980 |
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ORDER BY string4 using <, unique1 using >; |
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unique1 | string4 |
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---------+--------- |
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999 | AAAAxx |
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995 | AAAAxx |
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983 | AAAAxx |
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982 | AAAAxx |
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981 | AAAAxx |
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998 | HHHHxx |
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997 | HHHHxx |
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993 | HHHHxx |
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990 | HHHHxx |
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986 | HHHHxx |
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996 | OOOOxx |
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991 | OOOOxx |
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988 | OOOOxx |
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987 | OOOOxx |
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985 | OOOOxx |
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994 | VVVVxx |
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992 | VVVVxx |
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989 | VVVVxx |
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984 | VVVVxx |
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(19 rows) |
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|
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|
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-- |
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-- awk '{if($1>980){print $1,$16;}else{next;}}' onek.data | |
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-- sort +1dr -2 +0n -1 |
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-- |
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SELECT onek.unique1, onek.string4 FROM onek |
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WHERE onek.unique1 > 980 |
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ORDER BY string4 using >, unique1 using <; |
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unique1 | string4 |
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---------+--------- |
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984 | VVVVxx |
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989 | VVVVxx |
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992 | VVVVxx |
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994 | VVVVxx |
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985 | OOOOxx |
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987 | OOOOxx |
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988 | OOOOxx |
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991 | OOOOxx |
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996 | OOOOxx |
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986 | HHHHxx |
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990 | HHHHxx |
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993 | HHHHxx |
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997 | HHHHxx |
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998 | HHHHxx |
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981 | AAAAxx |
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982 | AAAAxx |
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983 | AAAAxx |
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995 | AAAAxx |
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999 | AAAAxx |
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(19 rows) |
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|
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|
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-- |
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-- awk '{if($1<20){print $1,$16;}else{next;}}' onek.data | |
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-- sort +0nr -1 +1d -2 |
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-- |
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SELECT onek.unique1, onek.string4 FROM onek |
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WHERE onek.unique1 < 20 |
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ORDER BY unique1 using >, string4 using <; |
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unique1 | string4 |
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---------+--------- |
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19 | OOOOxx |
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18 | VVVVxx |
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17 | HHHHxx |
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16 | OOOOxx |
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15 | VVVVxx |
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14 | AAAAxx |
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13 | OOOOxx |
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12 | AAAAxx |
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11 | OOOOxx |
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10 | AAAAxx |
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9 | HHHHxx |
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8 | HHHHxx |
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7 | VVVVxx |
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6 | OOOOxx |
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5 | HHHHxx |
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4 | HHHHxx |
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3 | VVVVxx |
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2 | OOOOxx |
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1 | OOOOxx |
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0 | OOOOxx |
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(20 rows) |
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|
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-- |
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-- awk '{if($1<20){print $1,$16;}else{next;}}' onek.data | |
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-- sort +0n -1 +1dr -2 |
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-- |
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SELECT onek.unique1, onek.string4 FROM onek |
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WHERE onek.unique1 < 20 |
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ORDER BY unique1 using <, string4 using >; |
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unique1 | string4 |
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---------+--------- |
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0 | OOOOxx |
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1 | OOOOxx |
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2 | OOOOxx |
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3 | VVVVxx |
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4 | HHHHxx |
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5 | HHHHxx |
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6 | OOOOxx |
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7 | VVVVxx |
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8 | HHHHxx |
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9 | HHHHxx |
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10 | AAAAxx |
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11 | OOOOxx |
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12 | AAAAxx |
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13 | OOOOxx |
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14 | AAAAxx |
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15 | VVVVxx |
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16 | OOOOxx |
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17 | HHHHxx |
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18 | VVVVxx |
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19 | OOOOxx |
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(20 rows) |
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|
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-- |
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-- test partial btree indexes |
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-- |
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-- As of 7.2, planner probably won't pick an indexscan without stats, |
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-- so ANALYZE first. Also, we want to prevent it from picking a bitmapscan |
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-- followed by sort, because that could hide index ordering problems. |
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-- |
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ANALYZE onek2; |
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SET enable_seqscan TO off; |
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SET enable_bitmapscan TO off; |
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SET enable_sort TO off; |
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-- |
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-- awk '{if($1<10){print $0;}else{next;}}' onek.data | sort +0n -1 |
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-- |
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SELECT onek2.* FROM onek2 WHERE onek2.unique1 < 10; |
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4 |
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+--------- |
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0 | 998 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | AAAAAA | KMBAAA | OOOOxx |
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1 | 214 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | BAAAAA | GIAAAA | OOOOxx |
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2 | 326 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 5 | CAAAAA | OMAAAA | OOOOxx |
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3 | 431 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 7 | DAAAAA | PQAAAA | VVVVxx |
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4 | 833 | 0 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 8 | 9 | EAAAAA | BGBAAA | HHHHxx |
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5 | 541 | 1 | 1 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 10 | 11 | FAAAAA | VUAAAA | HHHHxx |
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6 | 978 | 0 | 2 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 12 | 13 | GAAAAA | QLBAAA | OOOOxx |
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7 | 647 | 1 | 3 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 14 | 15 | HAAAAA | XYAAAA | VVVVxx |
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8 | 653 | 0 | 0 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 16 | 17 | IAAAAA | DZAAAA | HHHHxx |
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9 | 49 | 1 | 1 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 18 | 19 | JAAAAA | XBAAAA | HHHHxx |
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(10 rows) |
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|
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-- |
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-- awk '{if($1<20){print $1,$14;}else{next;}}' onek.data | sort +0nr -1 |
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-- |
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SELECT onek2.unique1, onek2.stringu1 FROM onek2 |
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WHERE onek2.unique1 < 20 |
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ORDER BY unique1 using >; |
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unique1 | stringu1 |
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---------+---------- |
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19 | TAAAAA |
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18 | SAAAAA |
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17 | RAAAAA |
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16 | QAAAAA |
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15 | PAAAAA |
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14 | OAAAAA |
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13 | NAAAAA |
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12 | MAAAAA |
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11 | LAAAAA |
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10 | KAAAAA |
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9 | JAAAAA |
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8 | IAAAAA |
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7 | HAAAAA |
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6 | GAAAAA |
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5 | FAAAAA |
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4 | EAAAAA |
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3 | DAAAAA |
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2 | CAAAAA |
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1 | BAAAAA |
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0 | AAAAAA |
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(20 rows) |
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|
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-- |
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-- awk '{if($1>980){print $1,$14;}else{next;}}' onek.data | sort +1d -2 |
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-- |
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SELECT onek2.unique1, onek2.stringu1 FROM onek2 |
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WHERE onek2.unique1 > 980; |
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unique1 | stringu1 |
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---------+---------- |
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981 | TLAAAA |
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982 | ULAAAA |
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983 | VLAAAA |
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984 | WLAAAA |
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985 | XLAAAA |
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986 | YLAAAA |
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987 | ZLAAAA |
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988 | AMAAAA |
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989 | BMAAAA |
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990 | CMAAAA |
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991 | DMAAAA |
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992 | EMAAAA |
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993 | FMAAAA |
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994 | GMAAAA |
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995 | HMAAAA |
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996 | IMAAAA |
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997 | JMAAAA |
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998 | KMAAAA |
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999 | LMAAAA |
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(19 rows) |
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|
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RESET enable_seqscan; |
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RESET enable_bitmapscan; |
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RESET enable_sort; |
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SELECT two, stringu1, ten, string4 |
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INTO TABLE tmp |
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FROM onek; |
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-- |
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-- awk '{print $1,$2;}' person.data | |
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-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - emp.data | |
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-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - student.data | |
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-- awk 'BEGIN{FS=" ";}{if(NF!=2){print $4,$5;}else{print;}}' - stud_emp.data |
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-- |
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-- SELECT name, age FROM person*; ??? check if different |
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SELECT p.name, p.age FROM person* p; |
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name | age |
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---------+----- |
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mike | 40 |
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joe | 20 |
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sally | 34 |
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sandra | 19 |
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alex | 30 |
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sue | 50 |
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denise | 24 |
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sarah | 88 |
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teresa | 38 |
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nan | 28 |
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leah | 68 |
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wendy | 78 |
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melissa | 28 |
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joan | 18 |
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mary | 8 |
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jane | 58 |
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liza | 38 |
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jean | 28 |
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jenifer | 38 |
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juanita | 58 |
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susan | 78 |
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zena | 98 |
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martie | 88 |
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chris | 78 |
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pat | 18 |
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zola | 58 |
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louise | 98 |
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edna | 18 |
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bertha | 88 |
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sumi | 38 |
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koko | 88 |
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gina | 18 |
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rean | 48 |
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sharon | 78 |
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paula | 68 |
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julie | 68 |
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belinda | 38 |
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karen | 48 |
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carina | 58 |
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diane | 18 |
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esther | 98 |
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trudy | 88 |
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fanny | 8 |
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carmen | 78 |
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lita | 25 |
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pamela | 48 |
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sandy | 38 |
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trisha | 88 |
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vera | 78 |
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velma | 68 |
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sharon | 25 |
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sam | 30 |
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bill | 20 |
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fred | 28 |
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larry | 60 |
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jeff | 23 |
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cim | 30 |
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linda | 19 |
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(58 rows) |
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|
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-- |
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-- awk '{print $1,$2;}' person.data | |
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-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - emp.data | |
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-- awk '{if(NF!=2){print $3,$2;}else{print;}}' - student.data | |
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-- awk 'BEGIN{FS=" ";}{if(NF!=1){print $4,$5;}else{print;}}' - stud_emp.data | |
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-- sort +1nr -2 |
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-- |
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SELECT p.name, p.age FROM person* p ORDER BY age using >, name; |
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name | age |
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---------+----- |
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esther | 98 |
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louise | 98 |
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zena | 98 |
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bertha | 88 |
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koko | 88 |
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martie | 88 |
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sarah | 88 |
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trisha | 88 |
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trudy | 88 |
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carmen | 78 |
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chris | 78 |
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sharon | 78 |
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susan | 78 |
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wendy | 78 |
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vera | 78 |
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julie | 68 |
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leah | 68 |
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paula | 68 |
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velma | 68 |
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larry | 60 |
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carina | 58 |
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jane | 58 |
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juanita | 58 |
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zola | 58 |
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sue | 50 |
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karen | 48 |
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pamela | 48 |
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rean | 48 |
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mike | 40 |
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belinda | 38 |
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jenifer | 38 |
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liza | 38 |
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sandy | 38 |
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sumi | 38 |
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teresa | 38 |
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sally | 34 |
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alex | 30 |
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cim | 30 |
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sam | 30 |
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fred | 28 |
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jean | 28 |
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melissa | 28 |
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nan | 28 |
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lita | 25 |
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sharon | 25 |
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denise | 24 |
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jeff | 23 |
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bill | 20 |
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joe | 20 |
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linda | 19 |
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sandra | 19 |
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diane | 18 |
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edna | 18 |
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gina | 18 |
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joan | 18 |
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pat | 18 |
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fanny | 8 |
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mary | 8 |
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(58 rows) |
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|
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-- |
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-- Test some cases involving whole-row Var referencing a subquery |
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-- |
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select foo from (select 1) as foo; |
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foo |
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----- |
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(1) |
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(1 row) |
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|
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select foo from (select null) as foo; |
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foo |
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----- |
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() |
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(1 row) |
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|
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select foo from (select 'xyzzy',1,null) as foo; |
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foo |
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------------ |
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(xyzzy,1,) |
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(1 row) |
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|
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-- |
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-- Test VALUES lists |
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-- |
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select * from onek, (values(147, 'RFAAAA'), (931, 'VJAAAA')) as v (i, j) |
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WHERE onek.unique1 = v.i and onek.stringu1 = v.j; |
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4 | i | j |
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------+-----+-------- |
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147 | 0 | 1 | 3 | 7 | 7 | 7 | 47 | 147 | 147 | 147 | 14 | 15 | RFAAAA | AAAAAA | AAAAxx | 147 | RFAAAA |
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931 | 1 | 1 | 3 | 1 | 11 | 1 | 31 | 131 | 431 | 931 | 2 | 3 | VJAAAA | BAAAAA | HHHHxx | 931 | VJAAAA |
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(2 rows) |
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|
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-- a more complex case |
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-- looks like we're coding lisp :-) |
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select * from onek, |
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(values ((select i from |
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(values(10000), (2), (389), (1000), (2000), ((select 10029))) as foo(i) |
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order by i asc limit 1))) bar (i) |
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where onek.unique1 = bar.i; |
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4 | i |
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------+--- |
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2 | 326 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 5 | CAAAAA | OMAAAA | OOOOxx | 2 |
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(1 row) |
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|
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-- try VALUES in a subquery |
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select * from onek |
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where (unique1,ten) in (values (1,1), (20,0), (99,9), (17,99)) |
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order by unique1; |
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unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4 |
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---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+--------- |
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1 | 214 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | BAAAAA | GIAAAA | OOOOxx |
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20 | 306 | 0 | 0 | 0 | 0 | 0 | 20 | 20 | 20 | 20 | 0 | 1 | UAAAAA | ULAAAA | OOOOxx |
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99 | 101 | 1 | 3 | 9 | 19 | 9 | 99 | 99 | 99 | 99 | 18 | 19 | VDAAAA | XDAAAA | HHHHxx |
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(3 rows) |
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|
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-- VALUES is also legal as a standalone query or a set-operation member |
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VALUES (1,2), (3,4+4), (7,77.7); |
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column1 | column2 |
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---------+--------- |
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1 | 2 |
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3 | 8 |
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7 | 77.7 |
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(3 rows) |
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|
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VALUES (1,2), (3,4+4), (7,77.7) |
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UNION ALL |
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SELECT 2+2, 57 |
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UNION ALL |
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SELECT * FROM int8_tbl; |
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column1 | column2 |
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------------------+------------------- |
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1 | 2 |
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3 | 8 |
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7 | 77.7 |
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4 | 57 |
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123 | 456 |
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123 | 4567890123456789 |
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4567890123456789 | 123 |
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4567890123456789 | 4567890123456789 |
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4567890123456789 | -4567890123456789 |
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(9 rows) |
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|
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-- |
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-- Test ORDER BY options |
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-- |
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CREATE TEMP TABLE foo (f1 int); |
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INSERT INTO foo VALUES (42),(3),(10),(7),(null),(null),(1); |
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SELECT * FROM foo ORDER BY f1; |
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f1 |
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---- |
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1 |
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3 |
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7 |
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10 |
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42 |
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|
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|
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 ASC; -- same thing |
||||
f1 |
||||
---- |
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 NULLS FIRST; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC NULLS LAST; |
||||
f1 |
||||
---- |
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
-- check if indexscans do the right things |
||||
CREATE INDEX fooi ON foo (f1); |
||||
SET enable_sort = false; |
||||
SELECT * FROM foo ORDER BY f1; |
||||
f1 |
||||
---- |
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 NULLS FIRST; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC NULLS LAST; |
||||
f1 |
||||
---- |
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
DROP INDEX fooi; |
||||
CREATE INDEX fooi ON foo (f1 DESC); |
||||
SELECT * FROM foo ORDER BY f1; |
||||
f1 |
||||
---- |
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 NULLS FIRST; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC NULLS LAST; |
||||
f1 |
||||
---- |
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
DROP INDEX fooi; |
||||
CREATE INDEX fooi ON foo (f1 DESC NULLS LAST); |
||||
SELECT * FROM foo ORDER BY f1; |
||||
f1 |
||||
---- |
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 NULLS FIRST; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
1 |
||||
3 |
||||
7 |
||||
10 |
||||
42 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC; |
||||
f1 |
||||
---- |
||||
|
||||
|
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
(7 rows) |
||||
|
||||
SELECT * FROM foo ORDER BY f1 DESC NULLS LAST; |
||||
f1 |
||||
---- |
||||
42 |
||||
10 |
||||
7 |
||||
3 |
||||
1 |
||||
|
||||
|
||||
(7 rows) |
||||
|
||||
-- |
||||
-- Test some corner cases that have been known to confuse the planner |
||||
-- |
||||
-- ORDER BY on a constant doesn't really need any sorting |
||||
SELECT 1 AS x ORDER BY x; |
||||
x |
||||
--- |
||||
1 |
||||
(1 row) |
||||
|
||||
-- But ORDER BY on a set-valued expression does |
||||
create function sillysrf(int) returns setof int as |
||||
'values (1),(10),(2),($1)' language sql immutable; |
||||
select sillysrf(42); |
||||
sillysrf |
||||
---------- |
||||
1 |
||||
10 |
||||
2 |
||||
42 |
||||
(4 rows) |
||||
|
||||
select sillysrf(-1) order by 1; |
||||
sillysrf |
||||
---------- |
||||
-1 |
||||
1 |
||||
2 |
||||
10 |
||||
(4 rows) |
||||
|
||||
drop function sillysrf(int); |
||||
Loading…
Reference in new issue