Re: remaining sql/json patches

[jian he]

minor issue.
maybe you can add the following after
/src/test/regress/sql/jsonb_sqljson.sql: 127.
Test coverage for ExecPrepareJsonItemCoercion function.

SELECT JSON_VALUE(jsonb 'null', '$ts' PASSING date '2018-02-21
12:34:56 +10' AS ts returning date);
SELECT JSON_VALUE(jsonb 'null', '$ts' PASSING time '2018-02-21
12:34:56 +10' AS ts returning time);
SELECT JSON_VALUE(jsonb 'null', '$ts' PASSING timetz '2018-02-21
12:34:56 +10' AS ts returning timetz);
SELECT JSON_VALUE(jsonb 'null', '$ts' PASSING timestamp '2018-02-21
12:34:56 +10' AS ts returning timestamp);