199 lines
4.0 KiB
Plaintext
199 lines
4.0 KiB
Plaintext
--
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-- HASH_INDEX
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-- grep 843938989 hash.data
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--
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SELECT * FROM hash_i4_heap
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WHERE hash_i4_heap.random = 843938989;
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seqno | random
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-------+-----------
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15 | 843938989
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(1 row)
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--
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-- hash index
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-- grep 66766766 hash.data
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--
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SELECT * FROM hash_i4_heap
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WHERE hash_i4_heap.random = 66766766;
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seqno | random
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-------+--------
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(0 rows)
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--
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-- hash index
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-- grep 1505703298 hash.data
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--
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SELECT * FROM hash_name_heap
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WHERE hash_name_heap.random = '1505703298'::name;
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seqno | random
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-------+------------
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9838 | 1505703298
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(1 row)
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--
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-- hash index
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-- grep 7777777 hash.data
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--
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SELECT * FROM hash_name_heap
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WHERE hash_name_heap.random = '7777777'::name;
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seqno | random
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-------+--------
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(0 rows)
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--
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-- hash index
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-- grep 1351610853 hash.data
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--
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SELECT * FROM hash_txt_heap
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WHERE hash_txt_heap.random = '1351610853'::text;
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seqno | random
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-------+------------
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5677 | 1351610853
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(1 row)
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--
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-- hash index
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-- grep 111111112222222233333333 hash.data
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--
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SELECT * FROM hash_txt_heap
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WHERE hash_txt_heap.random = '111111112222222233333333'::text;
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seqno | random
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-------+--------
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(0 rows)
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--
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-- hash index
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-- grep 444705537 hash.data
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--
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SELECT * FROM hash_f8_heap
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WHERE hash_f8_heap.random = '444705537'::float8;
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seqno | random
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-------+-----------
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7853 | 444705537
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(1 row)
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--
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-- hash index
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-- grep 88888888 hash.data
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--
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SELECT * FROM hash_f8_heap
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WHERE hash_f8_heap.random = '88888888'::float8;
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seqno | random
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-------+--------
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(0 rows)
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--
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-- hash index
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-- grep '^90[^0-9]' hashovfl.data
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--
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-- SELECT count(*) AS i988 FROM hash_ovfl_heap
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-- WHERE x = 90;
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--
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-- hash index
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-- grep '^1000[^0-9]' hashovfl.data
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--
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-- SELECT count(*) AS i0 FROM hash_ovfl_heap
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-- WHERE x = 1000;
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--
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-- HASH
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--
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UPDATE hash_i4_heap
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SET random = 1
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WHERE hash_i4_heap.seqno = 1492;
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SELECT h.seqno AS i1492, h.random AS i1
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FROM hash_i4_heap h
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WHERE h.random = 1;
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i1492 | i1
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-------+----
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1492 | 1
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(1 row)
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UPDATE hash_i4_heap
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SET seqno = 20000
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WHERE hash_i4_heap.random = 1492795354;
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SELECT h.seqno AS i20000
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FROM hash_i4_heap h
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WHERE h.random = 1492795354;
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i20000
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--------
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20000
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(1 row)
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UPDATE hash_name_heap
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SET random = '0123456789abcdef'::name
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WHERE hash_name_heap.seqno = 6543;
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SELECT h.seqno AS i6543, h.random AS c0_to_f
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FROM hash_name_heap h
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WHERE h.random = '0123456789abcdef'::name;
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i6543 | c0_to_f
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-------+------------------
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6543 | 0123456789abcdef
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(1 row)
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UPDATE hash_name_heap
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SET seqno = 20000
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WHERE hash_name_heap.random = '76652222'::name;
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--
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-- this is the row we just replaced; index scan should return zero rows
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--
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SELECT h.seqno AS emptyset
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FROM hash_name_heap h
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WHERE h.random = '76652222'::name;
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emptyset
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----------
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(0 rows)
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UPDATE hash_txt_heap
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SET random = '0123456789abcdefghijklmnop'::text
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WHERE hash_txt_heap.seqno = 4002;
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SELECT h.seqno AS i4002, h.random AS c0_to_p
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FROM hash_txt_heap h
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WHERE h.random = '0123456789abcdefghijklmnop'::text;
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i4002 | c0_to_p
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-------+----------------------------
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4002 | 0123456789abcdefghijklmnop
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(1 row)
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UPDATE hash_txt_heap
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SET seqno = 20000
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WHERE hash_txt_heap.random = '959363399'::text;
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SELECT h.seqno AS t20000
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FROM hash_txt_heap h
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WHERE h.random = '959363399'::text;
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t20000
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--------
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20000
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(1 row)
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UPDATE hash_f8_heap
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SET random = '-1234.1234'::float8
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WHERE hash_f8_heap.seqno = 8906;
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SELECT h.seqno AS i8096, h.random AS f1234_1234
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FROM hash_f8_heap h
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WHERE h.random = '-1234.1234'::float8;
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i8096 | f1234_1234
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-------+------------
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8906 | -1234.1234
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(1 row)
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UPDATE hash_f8_heap
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SET seqno = 20000
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WHERE hash_f8_heap.random = '488912369'::float8;
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SELECT h.seqno AS f20000
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FROM hash_f8_heap h
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WHERE h.random = '488912369'::float8;
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f20000
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--------
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20000
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(1 row)
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-- UPDATE hash_ovfl_heap
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-- SET x = 1000
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-- WHERE x = 90;
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-- this vacuums the index as well
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-- VACUUM hash_ovfl_heap;
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-- SELECT count(*) AS i0 FROM hash_ovfl_heap
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-- WHERE x = 90;
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-- SELECT count(*) AS i988 FROM hash_ovfl_heap
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-- WHERE x = 1000;
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