Rong Rong created FLINK-11935:
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Summary: Remove DateTimeUtils pull-in and fix datetime casting
problem
Key: FLINK-11935
URL: https://issues.apache.org/jira/browse/FLINK-11935
Project: Flink
Issue Type: Sub-task
Reporter: Rong Rong
Assignee: Rong Rong
This {{DateTimeUtils}} was pulled in in FLINK-7235.
Originally the time operation was not correctly done via the {{ymdToJulian}}
function before the date {{1970-01-01}} thus we need the fix. similar to
addressing this problem:
{code:java}
Optimized :1017-12-05 22:58:58.998
Expected :1017-11-29 22:58:58.998
Actual :1017-12-05 22:58:58.998
{code}
However, after pulling in avatica 1.13, I found out that the optimized plans of
the time operations are actually correct. it is in fact the casting part that
creates problem:
For example, the following:
*{{(plus(-12000.months, cast('2017-11-29 22:58:58.998', TIMESTAMP))}}*
result in a StringTestExpression of:
*{{CAST(1017-11-29 22:58:58.998):VARCHAR(65536) CHARACTER SET "UTF-16LE"
COLLATE "ISO-8859-1$en_US$primary" NOT NULL}}*
but the testing results are:
{code:java}
Optimized :1017-11-29 22:58:58.998
Expected :1017-11-29 22:58:58.998
Actual :1017-11-23 22:58:58.998
{code}
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