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/* syntax version 1 */
/* postgres can not */
USE plato;
-- These examples are taken from [ISO/IEC TR 19075-6:2017] standard (https://www.iso.org/standard/67367.html)
SELECT T.K,
JSON_VALUE (T.J, 'lax $.who') AS Who,
JSON_VALUE (T.J, 'lax $.where' NULL ON EMPTY) AS Nali,
JSON_QUERY (T.J, 'lax $.friends') AS Friends
FROM T
WHERE JSON_EXISTS (T.J, 'lax $.friends');
SELECT T.K,
JSON_VALUE (T.J, 'lax $.who') AS Who,
JSON_VALUE (T.J, 'lax $.where' NULL ON EMPTY) AS Nali,
JSON_QUERY (T.J, 'lax $.friends' NULL ON EMPTY) AS Friends
FROM T;
SELECT T.K,
JSON_VALUE (T.J, 'lax $.who') AS Who,
JSON_VALUE (T.J, 'lax $.where' NULL ON EMPTY) AS Nali,
JSON_QUERY (T.J, 'lax $.friends.name' WITH ARRAY WRAPPER) AS FriendsNames
FROM T;
-- In standard this example is demonstrated using PDF table, without any queries.
-- We represent it as set of queries, using NULL as error value.
-- Each SELECT is a row in source PDF table
$J2 = CAST(@@{ "a": "[1,2]", "b": [1,2], "c": "hi"}@@ as Json);
SELECT
JSON_VALUE($J2, "strict $.a"),
JSON_VALUE($J2, "strict $.b" NULL ON ERROR),
JSON_VALUE($J2, "strict $.c");
SELECT
JSON_QUERY($J2, "strict $.a" WITHOUT ARRAY WRAPPER NULL ON ERROR),
JSON_QUERY($J2, "strict $.b" WITHOUT ARRAY WRAPPER),
JSON_QUERY($J2, "strict $.c" WITHOUT ARRAY WRAPPER NULL ON ERROR);
SELECT
JSON_QUERY($J2, "strict $.a" WITH UNCONDITIONAL ARRAY WRAPPER),
JSON_QUERY($J2, "strict $.b" WITH UNCONDITIONAL ARRAY WRAPPER),
JSON_QUERY($J2, "strict $.c" WITH UNCONDITIONAL ARRAY WRAPPER);
SELECT
JSON_QUERY($J2, "strict $.a" WITH CONDITIONAL ARRAY WRAPPER),
JSON_QUERY($J2, "strict $.b" WITH CONDITIONAL ARRAY WRAPPER),
JSON_QUERY($J2, "strict $.c" WITH CONDITIONAL ARRAY WRAPPER);
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