seems like you need a SQL expression parser. I guess in the Java world we
don't have a need yet. Engines (Spark, Flink etc.) have their own SQL
parsers. They may leverage Calcite for that.
On Thu, Jul 25, 2024 at 2:16 PM Pucheng Yang <pucheng.yo...@gmail.com>
wrote:
> The motivation is that users usually need to define what partitions/ files
> to select in some DSL, where the filter is expressed as a form of the
> string, but the underlying engine is Java based.
>
> On Thu, Jul 25, 2024 at 2:07 PM Pucheng Yang <pucheng.yo...@gmail.com>
> wrote:
>
>> Hi Steve,
>>
>> Thanks for sharing, unfortunately, this is not what I am looking for. I
>> am looking for something like String of "dt = '2024-07-25' AND hr = '10'"
>> to an expression of Expressions.and(Expressions.equal("dt", "2024-07-25"),
>> Expressions.equal("hr", "10"). Similar to parser.parse() in iceberg-python
>> repo
>> https://github.com/apache/iceberg-python/blob/dd8d76d04f2d1c6c8192b83df9e84cee05ad5545/pyiceberg/expressions/parser.py#L268
>>
>> Thanks
>> Pucheng
>>
>>
>>
>> On Thu, Jul 25, 2024 at 1:26 PM Steve Zhang
>> <hongyue_zh...@apple.com.invalid> wrote:
>>
>>> Hey Pucheng,
>>>
>>> can you share a bit more on the motivation? Last time I checked
>>> there’s method in ExpressionParser allow you to convert json of string type
>>> to iceberg expression in here, not sure if this is what you need:
>>> https://github.com/apache/iceberg/blob/caf03aed926665014c22cc4a68902bf684f258f9/core/src/main/java/org/apache/iceberg/expressions/ExpressionParser.java#L262-L264
>>>
>>>
>>> Thanks,
>>> Steve Zhang
>>>
>>>
>>>
>>> On Jul 25, 2024, at 11:54 AM, Pucheng Yang <pucheng.yo...@gmail.com>
>>> wrote:
>>>
>>> Hi dev community,
>>>
>>> If I read the codebase correctly, there seems to be no utility for
>>> converting String to an Expression, anyone be interested if we have one?
>>>
>>> I can help if the community thinks this is a good addition, I will need
>>> some guidance on how to get this started though.
>>>
>>> Thanks
>>>
>>>
>>>
