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e4e6459c0f
varlena elements work now. Allow assignment to previously-nonexistent subscript position to extend array, but only for 1-D arrays and only if adjacent to existing positions (could do more if we had a way to represent nulls in arrays, but I don't want to tackle that now). Arrange for assignment of NULL to an array element in UPDATE to be a no-op, rather than setting the entire array to NULL as it used to. (Throwing an error would be a reasonable alternative, but it's never done that...) Update regress test accordingly.
94 lines
3.0 KiB
Plaintext
94 lines
3.0 KiB
Plaintext
--
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-- ARRAYS
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--
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SELECT * FROM arrtest;
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a | b | c | d | e | f | g
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-------------+-----------------+---------------+-------------------+---------------+-------------------+-----------------
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{1,2,3,4,5} | {{{0,0},{1,2}}} | {} | {} | | {} | {}
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{11,12,23} | {{3,4},{4,5}} | {"foobar"} | {{"elt1","elt2"}} | {"3.4","6.7"} | {"abc ","abcde"} | {"abc","abcde"}
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{} | {3,4} | {"foo","bar"} | {"bar","foo"} | | |
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(3 rows)
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SELECT arrtest.a[1],
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arrtest.b[1][1][1],
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arrtest.c[1],
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arrtest.d[1][1],
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arrtest.e[0]
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FROM arrtest;
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a | b | c | d | e
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----+---+--------+------+---
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1 | 0 | | |
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11 | | foobar | elt1 |
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| | foo | |
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(3 rows)
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SELECT a[1], b[1][1][1], c[1], d[1][1], e[0]
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FROM arrtest;
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a | b | c | d | e
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----+---+--------+------+---
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1 | 0 | | |
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11 | | foobar | elt1 |
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| | foo | |
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(3 rows)
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SELECT a[1:3],
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b[1:1][1:2][1:2],
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c[1:2],
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d[1:1][1:2]
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FROM arrtest;
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a | b | c | d
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------------+-----------------+---------------+-------------------
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{1,2,3} | {{{0,0},{1,2}}} | |
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{11,12,23} | | {"foobar"} | {{"elt1","elt2"}}
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| | {"foo","bar"} |
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(3 rows)
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SELECT array_dims(a) AS a,array_dims(b) AS b,array_dims(c) AS c
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FROM arrtest;
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a | b | c
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-------+-----------------+-------
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[1:5] | [1:1][1:2][1:2] |
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[1:3] | [1:2][1:2] | [1:1]
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| [1:2] | [1:2]
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(3 rows)
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-- returns nothing
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SELECT *
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FROM arrtest
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WHERE a[1] < 5 and
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c = '{"foobar"}'::_name;
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a | b | c | d | e | f | g
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---+---+---+---+---+---+---
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(0 rows)
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UPDATE arrtest
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SET a[1:2] = '{16,25}'
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WHERE NOT a = '{}'::_int2;
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UPDATE arrtest
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SET b[1:1][1:1][1:2] = '{113, 117}',
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b[1:1][1:2][2:2] = '{142, 147}'
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WHERE array_dims(b) = '[1:1][1:2][1:2]';
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UPDATE arrtest
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SET c[2:2] = '{"new_word"}'
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WHERE array_dims(c) is not null;
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SELECT a,b,c FROM arrtest;
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a | b | c
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---------------+-----------------------+-----------------------
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{16,25,3,4,5} | {{{113,142},{1,147}}} | {}
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{16,25,23} | {{3,4},{4,5}} | {"foobar","new_word"}
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{} | {3,4} | {"foo","new_word"}
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(3 rows)
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SELECT a[1:3],
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b[1:1][1:2][1:2],
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c[1:2],
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d[1:1][2:2]
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FROM arrtest;
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a | b | c | d
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------------+-----------------------+-----------------------+------------
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{16,25,3} | {{{113,142},{1,147}}} | |
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{16,25,23} | | {"foobar","new_word"} | {{"elt2"}}
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| | {"foo","new_word"} |
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(3 rows)
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