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feat: expose cid_string udf in query and flight sql
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| use std::{any::Any, sync::Arc}; | ||
|
|
||
| use cid::Cid; | ||
| use datafusion::{ | ||
| arrow::{ | ||
| array::{ArrayIter, ListBuilder, StringBuilder}, | ||
| datatypes::DataType, | ||
| }, | ||
| common::{ | ||
| cast::{as_binary_array, as_list_array}, | ||
| exec_datafusion_err, | ||
| }, | ||
| logical_expr::{ColumnarValue, ScalarUDFImpl, Signature, TypeSignature, Volatility}, | ||
| }; | ||
|
|
||
| /// ScalarUDF to convert a binary CID into a string for easier inspection. | ||
| #[derive(Debug)] | ||
| pub struct CidString { | ||
| signature: Signature, | ||
| } | ||
|
|
||
| impl Default for CidString { | ||
| fn default() -> Self { | ||
| Self::new() | ||
| } | ||
| } | ||
|
|
||
| impl CidString { | ||
| /// Construct new instance | ||
| pub fn new() -> Self { | ||
| Self { | ||
| signature: Signature::new( | ||
| TypeSignature::Exact(vec![DataType::Binary]), | ||
| Volatility::Immutable, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl ScalarUDFImpl for CidString { | ||
| fn as_any(&self) -> &dyn Any { | ||
| self | ||
| } | ||
| fn name(&self) -> &str { | ||
| "cid_string" | ||
| } | ||
| fn signature(&self) -> &Signature { | ||
| &self.signature | ||
| } | ||
| fn return_type(&self, _args: &[DataType]) -> datafusion::common::Result<DataType> { | ||
| Ok(DataType::Utf8) | ||
| } | ||
| fn invoke(&self, args: &[ColumnarValue]) -> datafusion::common::Result<ColumnarValue> { | ||
| let args = ColumnarValue::values_to_arrays(args)?; | ||
| let cids = as_binary_array(&args[0])?; | ||
| let mut strs = StringBuilder::new(); | ||
| for cid in cids { | ||
| if let Some(cid) = cid { | ||
| strs.append_value( | ||
| Cid::read_bytes(cid) | ||
| .map_err(|err| exec_datafusion_err!("Error {err}"))? | ||
| .to_string(), | ||
| ); | ||
| } else { | ||
| strs.append_null() | ||
| } | ||
| } | ||
| Ok(ColumnarValue::Array(Arc::new(strs.finish()))) | ||
| } | ||
| } | ||
|
|
||
| /// ScalarUDF to convert a binary CID into a string for easier inspection. | ||
| #[derive(Debug)] | ||
| pub struct CidStringList { | ||
| signature: Signature, | ||
| } | ||
|
|
||
| impl Default for CidStringList { | ||
| fn default() -> Self { | ||
| Self::new() | ||
| } | ||
| } | ||
|
|
||
| impl CidStringList { | ||
| /// Construct new instance | ||
| pub fn new() -> Self { | ||
| Self { | ||
| signature: Signature::new( | ||
| TypeSignature::Exact(vec![DataType::new_list(DataType::Binary, true)]), | ||
| Volatility::Immutable, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl ScalarUDFImpl for CidStringList { | ||
| fn as_any(&self) -> &dyn Any { | ||
| self | ||
| } | ||
| fn name(&self) -> &str { | ||
| "array_cid_string" | ||
| } | ||
| fn signature(&self) -> &Signature { | ||
| &self.signature | ||
| } | ||
| fn return_type(&self, _args: &[DataType]) -> datafusion::common::Result<DataType> { | ||
| Ok(DataType::new_list(DataType::Utf8, true)) | ||
| } | ||
| fn invoke(&self, args: &[ColumnarValue]) -> datafusion::common::Result<ColumnarValue> { | ||
| let args = ColumnarValue::values_to_arrays(args)?; | ||
| let all_cids = as_list_array(&args[0])?; | ||
| let mut strs = ListBuilder::new(StringBuilder::new()); | ||
| for cids in ArrayIter::new(all_cids) { | ||
| if let Some(cids) = cids { | ||
| let cids = as_binary_array(&cids)?; | ||
| for cid in cids { | ||
| if let Some(cid) = cid { | ||
| strs.values().append_value( | ||
| Cid::read_bytes(cid) | ||
| .map_err(|err| exec_datafusion_err!("Error {err}"))? | ||
| .to_string(), | ||
| ); | ||
| } else { | ||
| strs.values().append_null() | ||
| } | ||
| } | ||
| strs.append(true) | ||
| } else { | ||
| strs.append_null() | ||
| } | ||
| } | ||
| Ok(ColumnarValue::Array(Arc::new(strs.finish()))) | ||
| } | ||
| } |
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