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408 lines
13 KiB
408 lines
13 KiB
-- Strings.
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SELECT '""'::json; -- OK.
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json
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------
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""
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(1 row)
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SELECT $$''$$::json; -- ERROR, single quotes are not allowed
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ERROR: invalid input syntax for type json
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LINE 1: SELECT $$''$$::json;
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^
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DETAIL: line 1: Token "'" is invalid.
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SELECT '"abc"'::json; -- OK
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json
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-------
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"abc"
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(1 row)
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SELECT '"abc'::json; -- ERROR, quotes not closed
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '"abc'::json;
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^
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DETAIL: line 1: Token ""abc" is invalid.
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SELECT '"abc
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def"'::json; -- ERROR, unescaped newline in string constant
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '"abc
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^
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DETAIL: line 1: Character with value "0x0a" must be escaped.
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SELECT '"\n\"\\"'::json; -- OK, legal escapes
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json
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----------
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"\n\"\\"
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(1 row)
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SELECT '"\v"'::json; -- ERROR, not a valid JSON escape
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '"\v"'::json;
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^
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DETAIL: line 1: Invalid escape "\v".
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SELECT '"\u"'::json; -- ERROR, incomplete escape
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '"\u"'::json;
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^
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DETAIL: line 1: "\u" must be followed by four hexadecimal digits.
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SELECT '"\u00"'::json; -- ERROR, incomplete escape
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '"\u00"'::json;
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^
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DETAIL: line 1: "\u" must be followed by four hexadecimal digits.
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SELECT '"\u000g"'::json; -- ERROR, g is not a hex digit
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '"\u000g"'::json;
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^
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DETAIL: line 1: "\u" must be followed by four hexadecimal digits.
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SELECT '"\u0000"'::json; -- OK, legal escape
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json
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----------
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"\u0000"
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(1 row)
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SELECT '"\uaBcD"'::json; -- OK, uppercase and lower case both OK
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json
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----------
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"\uaBcD"
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(1 row)
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-- Numbers.
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SELECT '1'::json; -- OK
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json
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------
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1
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(1 row)
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SELECT '0'::json; -- OK
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json
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------
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0
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(1 row)
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SELECT '01'::json; -- ERROR, not valid according to JSON spec
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '01'::json;
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^
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DETAIL: line 1: Token "01" is invalid.
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SELECT '0.1'::json; -- OK
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json
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------
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0.1
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(1 row)
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SELECT '9223372036854775808'::json; -- OK, even though it's too large for int8
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json
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---------------------
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9223372036854775808
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(1 row)
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SELECT '1e100'::json; -- OK
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json
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-------
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1e100
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(1 row)
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SELECT '1.3e100'::json; -- OK
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json
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---------
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1.3e100
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(1 row)
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SELECT '1f2'::json; -- ERROR
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '1f2'::json;
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^
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DETAIL: line 1: Token "1f2" is invalid.
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SELECT '0.x1'::json; -- ERROR
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '0.x1'::json;
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^
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DETAIL: line 1: Token "0.x1" is invalid.
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SELECT '1.3ex100'::json; -- ERROR
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '1.3ex100'::json;
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^
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DETAIL: line 1: Token "1.3ex100" is invalid.
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-- Arrays.
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SELECT '[]'::json; -- OK
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json
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------
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[]
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(1 row)
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SELECT '[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]'::json; -- OK
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json
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----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
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(1 row)
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SELECT '[1,2]'::json; -- OK
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json
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-------
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[1,2]
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(1 row)
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SELECT '[1,2,]'::json; -- ERROR, trailing comma
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ERROR: invalid input syntax for type json: "[1,2,]"
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LINE 1: SELECT '[1,2,]'::json;
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^
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DETAIL: line 1: Expected string, number, object, array, true, false, or null, but found "]".
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SELECT '[1,2'::json; -- ERROR, no closing bracket
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ERROR: invalid input syntax for type json: "[1,2"
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LINE 1: SELECT '[1,2'::json;
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^
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DETAIL: The input string ended unexpectedly.
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SELECT '[1,[2]'::json; -- ERROR, no closing bracket
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ERROR: invalid input syntax for type json: "[1,[2]"
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LINE 1: SELECT '[1,[2]'::json;
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^
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DETAIL: The input string ended unexpectedly.
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-- Objects.
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SELECT '{}'::json; -- OK
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json
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------
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{}
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(1 row)
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SELECT '{"abc"}'::json; -- ERROR, no value
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ERROR: invalid input syntax for type json: "{"abc"}"
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LINE 1: SELECT '{"abc"}'::json;
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^
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DETAIL: line 1: Expected ":", but found "}".
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SELECT '{"abc":1}'::json; -- OK
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json
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-----------
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{"abc":1}
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(1 row)
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SELECT '{1:"abc"}'::json; -- ERROR, keys must be strings
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ERROR: invalid input syntax for type json: "{1:"abc"}"
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LINE 1: SELECT '{1:"abc"}'::json;
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^
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DETAIL: line 1: Expected string or "}", but found "1".
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SELECT '{"abc",1}'::json; -- ERROR, wrong separator
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ERROR: invalid input syntax for type json: "{"abc",1}"
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LINE 1: SELECT '{"abc",1}'::json;
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^
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DETAIL: line 1: Expected ":", but found ",".
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SELECT '{"abc"=1}'::json; -- ERROR, totally wrong separator
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ERROR: invalid input syntax for type json
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LINE 1: SELECT '{"abc"=1}'::json;
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^
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DETAIL: line 1: Token "=" is invalid.
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SELECT '{"abc"::1}'::json; -- ERROR, another wrong separator
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ERROR: invalid input syntax for type json: "{"abc"::1}"
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LINE 1: SELECT '{"abc"::1}'::json;
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^
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DETAIL: line 1: Expected string, number, object, array, true, false, or null, but found ":".
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SELECT '{"abc":1,"def":2,"ghi":[3,4],"hij":{"klm":5,"nop":[6]}}'::json; -- OK
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json
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---------------------------------------------------------
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{"abc":1,"def":2,"ghi":[3,4],"hij":{"klm":5,"nop":[6]}}
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(1 row)
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SELECT '{"abc":1:2}'::json; -- ERROR, colon in wrong spot
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ERROR: invalid input syntax for type json: "{"abc":1:2}"
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LINE 1: SELECT '{"abc":1:2}'::json;
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^
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DETAIL: line 1: Expected "," or "}", but found ":".
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SELECT '{"abc":1,3}'::json; -- ERROR, no value
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ERROR: invalid input syntax for type json: "{"abc":1,3}"
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LINE 1: SELECT '{"abc":1,3}'::json;
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^
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DETAIL: line 1: Expected string, but found "3".
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-- Miscellaneous stuff.
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SELECT 'true'::json; -- OK
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json
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------
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true
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(1 row)
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SELECT 'false'::json; -- OK
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json
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-------
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false
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(1 row)
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SELECT 'null'::json; -- OK
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json
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------
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null
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(1 row)
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SELECT ' true '::json; -- OK, even with extra whitespace
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json
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--------
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true
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(1 row)
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SELECT 'true false'::json; -- ERROR, too many values
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ERROR: invalid input syntax for type json: "true false"
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LINE 1: SELECT 'true false'::json;
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^
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DETAIL: line 1: Expected end of input, but found "false".
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SELECT 'true, false'::json; -- ERROR, too many values
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ERROR: invalid input syntax for type json: "true, false"
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LINE 1: SELECT 'true, false'::json;
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^
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DETAIL: line 1: Expected end of input, but found ",".
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SELECT 'truf'::json; -- ERROR, not a keyword
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ERROR: invalid input syntax for type json
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LINE 1: SELECT 'truf'::json;
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^
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DETAIL: line 1: Token "truf" is invalid.
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SELECT 'trues'::json; -- ERROR, not a keyword
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ERROR: invalid input syntax for type json
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LINE 1: SELECT 'trues'::json;
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^
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DETAIL: line 1: Token "trues" is invalid.
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SELECT ''::json; -- ERROR, no value
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ERROR: invalid input syntax for type json: ""
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LINE 1: SELECT ''::json;
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^
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DETAIL: The input string ended unexpectedly.
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SELECT ' '::json; -- ERROR, no value
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ERROR: invalid input syntax for type json: " "
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LINE 1: SELECT ' '::json;
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^
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DETAIL: The input string ended unexpectedly.
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--constructors
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-- array_to_json
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SELECT array_to_json(array(select 1 as a));
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array_to_json
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---------------
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[1]
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(1 row)
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SELECT array_to_json(array_agg(q),false) from (select x as b, x * 2 as c from generate_series(1,3) x) q;
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array_to_json
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---------------------------------------------
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[{"b":1,"c":2},{"b":2,"c":4},{"b":3,"c":6}]
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(1 row)
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SELECT array_to_json(array_agg(q),true) from (select x as b, x * 2 as c from generate_series(1,3) x) q;
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array_to_json
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-----------------
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[{"b":1,"c":2},+
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{"b":2,"c":4},+
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{"b":3,"c":6}]
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(1 row)
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SELECT array_to_json(array_agg(q),false)
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FROM ( SELECT $$a$$ || x AS b, y AS c,
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ARRAY[ROW(x.*,ARRAY[1,2,3]),
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ROW(y.*,ARRAY[4,5,6])] AS z
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FROM generate_series(1,2) x,
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generate_series(4,5) y) q;
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array_to_json
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-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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[{"b":"a1","c":4,"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]},{"b":"a1","c":5,"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]},{"b":"a2","c":4,"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]},{"b":"a2","c":5,"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}]
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(1 row)
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SELECT array_to_json(array_agg(x),false) from generate_series(5,10) x;
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array_to_json
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----------------
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[5,6,7,8,9,10]
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(1 row)
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SELECT array_to_json('{{1,5},{99,100}}'::int[]);
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array_to_json
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------------------
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[[1,5],[99,100]]
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(1 row)
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-- row_to_json
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SELECT row_to_json(row(1,'foo'));
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row_to_json
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---------------------
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{"f1":1,"f2":"foo"}
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(1 row)
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SELECT row_to_json(q)
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FROM (SELECT $$a$$ || x AS b,
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y AS c,
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ARRAY[ROW(x.*,ARRAY[1,2,3]),
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ROW(y.*,ARRAY[4,5,6])] AS z
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FROM generate_series(1,2) x,
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generate_series(4,5) y) q;
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row_to_json
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--------------------------------------------------------------------
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{"b":"a1","c":4,"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
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{"b":"a1","c":5,"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
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{"b":"a2","c":4,"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
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{"b":"a2","c":5,"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
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(4 rows)
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SELECT row_to_json(q,true)
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FROM (SELECT $$a$$ || x AS b,
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y AS c,
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ARRAY[ROW(x.*,ARRAY[1,2,3]),
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ROW(y.*,ARRAY[4,5,6])] AS z
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FROM generate_series(1,2) x,
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generate_series(4,5) y) q;
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row_to_json
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-----------------------------------------------------
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{"b":"a1", +
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"c":4, +
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"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
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{"b":"a1", +
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"c":5, +
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"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
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{"b":"a2", +
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"c":4, +
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"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
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{"b":"a2", +
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"c":5, +
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"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
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(4 rows)
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CREATE TEMP TABLE rows AS
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SELECT x, 'txt' || x as y
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FROM generate_series(1,3) AS x;
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SELECT row_to_json(q,true)
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FROM rows q;
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row_to_json
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--------------
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{"x":1, +
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"y":"txt1"}
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{"x":2, +
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"y":"txt2"}
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{"x":3, +
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"y":"txt3"}
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(3 rows)
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SELECT row_to_json(row((select array_agg(x) as d from generate_series(5,10) x)),false);
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row_to_json
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-----------------------
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{"f1":[5,6,7,8,9,10]}
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(1 row)
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-- non-numeric output
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SELECT row_to_json(q)
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FROM (SELECT 'NaN'::float8 AS "float8field") q;
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row_to_json
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-----------------------
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{"float8field":"NaN"}
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(1 row)
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SELECT row_to_json(q)
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FROM (SELECT 'Infinity'::float8 AS "float8field") q;
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row_to_json
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----------------------------
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{"float8field":"Infinity"}
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(1 row)
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SELECT row_to_json(q)
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FROM (SELECT '-Infinity'::float8 AS "float8field") q;
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row_to_json
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-----------------------------
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{"float8field":"-Infinity"}
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(1 row)
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-- json input
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SELECT row_to_json(q)
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FROM (SELECT '{"a":1,"b": [2,3,4,"d","e","f"],"c":{"p":1,"q":2}}'::json AS "jsonfield") q;
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row_to_json
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------------------------------------------------------------------
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{"jsonfield":{"a":1,"b": [2,3,4,"d","e","f"],"c":{"p":1,"q":2}}}
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(1 row)
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