Hanyu Zheng created FLINK-36898:
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Summary: Support SQL FLOOR and CEIL functions with NanoSecond
Key: FLINK-36898
URL: https://issues.apache.org/jira/browse/FLINK-36898
Project: Flink
Issue Type: Improvement
Reporter: Hanyu Zheng
Currently, Flink does not support nanosecond precision for the CEIL and FLOOR
functions. This limitation exists because Flink does not have a data type with
precision greater than nanoseconds. To introduce support for nanoseconds in
these functions, we would first need to evaluate whether this level of
precision is required. If the requirement is confirmed, it may necessitate the
creation of a new data type with nanosecond or higher precision.
This ticket aims to:
# Investigate the need for nanosecond precision in CEIL and FLOOR functions.
# Analyze the technical feasibility of extending Flink's type system to
support nanoseconds.
# Identify potential changes required across Flink's core components,
including data types, functions, and runtime execution.
This research will guide whether a subsequent implementation task is needed to
support nanosecond precision.
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