787 lines
17 KiB
Plaintext
787 lines
17 KiB
Plaintext
--
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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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-- 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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-- 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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-- 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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-- 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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-- 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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-- 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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-- 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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-- 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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-- 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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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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uma | 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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-- 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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uma | 78
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wendy | 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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-- 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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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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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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-- 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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-- 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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-- 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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-- 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
|
|
(3 rows)
|
|
|
|
VALUES (1,2), (3,4+4), (7,77.7)
|
|
UNION ALL
|
|
SELECT 2+2, 57
|
|
UNION ALL
|
|
TABLE int8_tbl;
|
|
column1 | column2
|
|
------------------+-------------------
|
|
1 | 2
|
|
3 | 8
|
|
7 | 77.7
|
|
4 | 57
|
|
123 | 456
|
|
123 | 4567890123456789
|
|
4567890123456789 | 123
|
|
4567890123456789 | 4567890123456789
|
|
4567890123456789 | -4567890123456789
|
|
(9 rows)
|
|
|
|
--
|
|
-- Test ORDER BY options
|
|
--
|
|
CREATE TEMP TABLE foo (f1 int);
|
|
INSERT INTO foo VALUES (42),(3),(10),(7),(null),(null),(1);
|
|
SELECT * FROM foo ORDER BY f1;
|
|
f1
|
|
----
|
|
1
|
|
3
|
|
7
|
|
10
|
|
42
|
|
|
|
|
|
(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);
|
|
-- X = X isn't a no-op, it's effectively X IS NOT NULL assuming = is strict
|
|
-- (see bug #5084)
|
|
select * from (values (2),(null),(1)) v(k) where k = k order by k;
|
|
k
|
|
---
|
|
1
|
|
2
|
|
(2 rows)
|
|
|
|
select * from (values (2),(null),(1)) v(k) where k = k;
|
|
k
|
|
---
|
|
2
|
|
1
|
|
(2 rows)
|
|
|