feat: support prql

[ncuwaln]

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/

Summary

support prql in databend
#14811

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[sundy-li]

could we support this inside the ast crate ?

[ncuwaln]

could we support this inside the ast crate ?

Ast crate use tokens as parameter now, but prql's token not same as databend sql’s token. so if we want to support this inside ast, maybe we need make string as ast parser's parameter?

[sundy-li]

Ast crate use tokens as parameter now, but prql's token not same as databend sql’s token. so if we want to support this inside ast, maybe we need make string as ast parser's parameter?

I see now, this pr's approach is ok.

[sundy-li]

Good to me, let's add some tests.

[ncuwaln]

Good to me, let's add some tests.

done

[snth]

Thank you!

[max-sixty]

Hi from the PRQL team! Excited to see this.

If you'd like to add links to Databend from our website & docs, please feel free to. We did this for ClickHouse when they started supporting PRQL, so we could pretty much copy that PR..

[sundy-li]

If you'd like to add links to Databend from our website & docs, please feel free to

@ncuwaln Could you send a pr to improve the PRQL's website?

BTW @max-sixty we will write a blog about PRQL with Databend soon.

[ncuwaln]

@ncuwaln Could you send a pr to improve the PRQL's website?

Of course, i will send a pr soon

[ncuwaln]

Of course, i will send a pr soon

I will send a pr after databend doc ready

[sundy-li]

document cc @soyeric128

[soyeric128]

Prql is missing:

[ncuwaln]

Prql is missing:

Already send a pr to fix it

#15091

[sundy-li]

A blog about databend & prql: https://www.databend.com/blog/2024-04-03-databend-integrates-prql/