start_time and end_time can be a string that represents a time (e.g. '2012-01-01 00:00:00 0900') or a UNIX timestamp (e.g. 1325343600). If the format of ...
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presto-string-functions
Presto v0.1.2 Presto.Util View Source. Link to this section Summary. Types. safe()​. Guaranteed to be safe. Functions. safe_to_string(arg) .... String Functions#. Note. These functions assume that the input strings contain valid UTF-8 encoded Unicode code points. There are no explicit checks for valid​ .... Aug 27, 2019 — Determines if json is a scalar (i.e. a JSON number, a JSON string, true, false or null). Example: Query, Output. SELECT is_json_scalar('1'), true. 939c2ea5af