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Built-in JSON data type.

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Like the XML data type, we simply store JSON data as text, after checking
that it is valid.  More complex operations such as canonicalization and
comparison may come later, but this is enough for not.

There are a few open issues here, such as whether we should attempt to
detect UTF-8 surrogate pairs represented as \uXXXX\uYYYY, but this gets
the basic framework in place.
This commit is contained in:
Robert Haas
2012-01-31 11:48:23 -05:00
parent 4c6cedd1b0
commit 5384a73f98
11 changed files with 1059 additions and 5 deletions
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56
src/test/regress/sql/json.sql Normal file
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-- Strings.
SELECT '""'::json; -- OK.
SELECT $$''$$::json; -- ERROR, single quotes are not allowed
SELECT '"abc"'::json; -- OK
SELECT '"abc'::json; -- ERROR, quotes not closed
SELECT '"abc
def"'::json; -- ERROR, unescaped newline in string constant
SELECT '"\n\"\\"'::json; -- OK, legal escapes
SELECT '"\v"'::json; -- ERROR, not a valid JSON escape
SELECT '"\u"'::json; -- ERROR, incomplete escape
SELECT '"\u00"'::json; -- ERROR, incomplete escape
SELECT '"\u000g"'::json; -- ERROR, g is not a hex digit
SELECT '"\u0000"'::json; -- OK, legal escape
SELECT '"\uaBcD"'::json; -- OK, uppercase and lower case both OK
-- Numbers.
SELECT '1'::json; -- OK
SELECT '0'::json; -- OK
SELECT '01'::json; -- ERROR, not valid according to JSON spec
SELECT '0.1'::json; -- OK
SELECT '9223372036854775808'::json; -- OK, even though it's too large for int8
SELECT '1e100'::json; -- OK
SELECT '1.3e100'::json; -- OK
SELECT '1f2'::json; -- ERROR
-- Arrays.
SELECT '[]'::json; -- OK
SELECT '[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]'::json; -- OK
SELECT '[1,2]'::json; -- OK
SELECT '[1,2,]'::json; -- ERROR, trailing comma
SELECT '[1,2'::json; -- ERROR, no closing bracket
SELECT '[1,[2]'::json; -- ERROR, no closing bracket
-- Objects.
SELECT '{}'::json; -- OK
SELECT '{"abc"}'::json; -- ERROR, no value
SELECT '{"abc":1}'::json; -- OK
SELECT '{1:"abc"}'::json; -- ERROR, keys must be strings
SELECT '{"abc",1}'::json; -- ERROR, wrong separator
SELECT '{"abc"=1}'::json; -- ERROR, totally wrong separator
SELECT '{"abc"::1}'::json; -- ERROR, another wrong separator
SELECT '{"abc":1,"def":2,"ghi":[3,4],"hij":{"klm":5,"nop":[6]}}'::json; -- OK
SELECT '{"abc":1:2}'::json; -- ERROR, colon in wrong spot
SELECT '{"abc":1,3}'::json; -- ERROR, no value
-- Miscellaneous stuff.
SELECT 'true'::json; -- OK
SELECT 'false'::json; -- OK
SELECT 'null'::json; -- OK
SELECT ' true '::json; -- OK, even with extra whitespace
SELECT 'true false'::json; -- ERROR, too many values
SELECT 'true, false'::json; -- ERROR, too many values
SELECT 'truf'::json; -- ERROR, not a keyword
SELECT 'trues'::json; -- ERROR, not a keyword
SELECT ''::json; -- ERROR, no value
SELECT ' '::json; -- ERROR, no value