4397225743

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new readme (#1221)

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70.91

/dozer-sql/src/pipeline/projection/processor.rs

use crate::pipeline::expression::execution::{Expression, ExpressionExecutor};

use dozer_core::channels::ProcessorChannelForwarder;
use dozer_core::epoch::Epoch;
use dozer_core::errors::ExecutionError;
use dozer_core::errors::ExecutionError::InternalError;
use dozer_core::node::{PortHandle, Processor};
use dozer_core::storage::lmdb_storage::SharedTransaction;
use dozer_core::DEFAULT_PORT_HANDLE;
use dozer_types::types::{Operation, Record, Schema};

#[derive(Debug)]
pub struct ProjectionProcessor {
    expressions: Vec<Expression>,
    input_schema: Schema,
}

impl ProjectionProcessor {
    pub fn new(input_schema: Schema, expressions: Vec<Expression>) -> Self {
        Self {
            input_schema,
            expressions,
        }
    }

    fn delete(&mut self, record: &Record) -> Result<Operation, ExecutionError> {
        let mut results = vec![];

        for expr in &self.expressions {
            results.push(
                expr.evaluate(record, &self.input_schema)
                    .map_err(|e| InternalError(Box::new(e)))?,
            );
        }
        Ok(Operation::Delete {
            old: Record::new(None, results, None),
        })
    }

    fn insert(&mut self, record: &Record) -> Result<Operation, ExecutionError> {
        let mut results = vec![];

        for expr in self.expressions.clone() {
            results.push(
                expr.evaluate(record, &self.input_schema)
                    .map_err(|e| InternalError(Box::new(e)))?,
            );
        }
        Ok(Operation::Insert {
            new: Record::new(None, results, None),
        })
    }

    fn update(&self, old: &Record, new: &Record) -> Result<Operation, ExecutionError> {
        let mut old_results = vec![];
        let mut new_results = vec![];

        for expr in &self.expressions {
            old_results.push(
                expr.evaluate(old, &self.input_schema)
                    .map_err(|e| InternalError(Box::new(e)))?,
            );
            new_results.push(
                expr.evaluate(new, &self.input_schema)
                    .map_err(|e| InternalError(Box::new(e)))?,
            );
        }

        Ok(Operation::Update {
            old: Record::new(None, old_results, None),
            new: Record::new(None, new_results, None),
        })
    }
}

impl Processor for ProjectionProcessor {
    fn process(
        &mut self,
        _from_port: PortHandle,
        op: Operation,
        fw: &mut dyn ProcessorChannelForwarder,
        _tx: &SharedTransaction,
    ) -> Result<(), ExecutionError> {
        let _ = match op {
            Operation::Delete { ref old } => fw.send(self.delete(old)?, DEFAULT_PORT_HANDLE),
            Operation::Insert { ref new } => fw.send(self.insert(new)?, DEFAULT_PORT_HANDLE),
            Operation::Update { ref old, ref new } => {
                fw.send(self.update(old, new)?, DEFAULT_PORT_HANDLE)
            }
        };
        Ok(())
    }

    fn commit(&self, _epoch: &Epoch, _tx: &SharedTransaction) -> Result<(), ExecutionError> {
        Ok(())
    }
}

1	use crate::pipeline::expression::execution::{Expression, ExpressionExecutor};
2
3	use dozer_core::channels::ProcessorChannelForwarder;
4	use dozer_core::epoch::Epoch;
5	use dozer_core::errors::ExecutionError;
6	use dozer_core::errors::ExecutionError::InternalError;
7	use dozer_core::node::{PortHandle, Processor};
8	use dozer_core::storage::lmdb_storage::SharedTransaction;
9	use dozer_core::DEFAULT_PORT_HANDLE;
10	use dozer_types::types::{Operation, Record, Schema};
11
12	#[derive(Debug)]	×
13	pub struct ProjectionProcessor {
14	expressions: Vec<Expression>,
15	input_schema: Schema,
16	}
17
18	impl ProjectionProcessor {
19	pub fn new(input_schema: Schema, expressions: Vec<Expression>) -> Self {	623✔
20	Self {	623✔
21	input_schema,	623✔
22	expressions,	623✔
23	}	623✔
24	}	623✔
25
26	fn delete(&mut self, record: &Record) -> Result<Operation, ExecutionError> {	2,250✔
27	let mut results = vec![];	2,250✔
28
29	for expr in &self.expressions {	8,860✔
30	results.push(
31	expr.evaluate(record, &self.input_schema)	6,610✔
32	.map_err(\|e\| InternalError(Box::new(e)))?,	6,610✔
33	);
34	}
35	Ok(Operation::Delete {	2,250✔
36	old: Record::new(None, results, None),	2,250✔
37	})	2,250✔
38	}	2,250✔
39
40	fn insert(&mut self, record: &Record) -> Result<Operation, ExecutionError> {	459,378✔
41	let mut results = vec![];	459,378✔
42
43	for expr in self.expressions.clone() {	927,388✔
44	results.push(
45	expr.evaluate(record, &self.input_schema)	927,388✔
46	.map_err(\|e\| InternalError(Box::new(e)))?,	927,388✔
47	);
48	}
49	Ok(Operation::Insert {	459,460✔
50	new: Record::new(None, results, None),	459,460✔
51	})	459,460✔
52	}	459,460✔
53
54	fn update(&self, old: &Record, new: &Record) -> Result<Operation, ExecutionError> {	×
55	let mut old_results = vec![];	×
56	let mut new_results = vec![];	×
57
58	for expr in &self.expressions {	×
59	old_results.push(
60	expr.evaluate(old, &self.input_schema)	×
61	.map_err(\|e\| InternalError(Box::new(e)))?,	×
62	);
63	new_results.push(
64	expr.evaluate(new, &self.input_schema)	×
65	.map_err(\|e\| InternalError(Box::new(e)))?,	×
66	);
67	}
68
69	Ok(Operation::Update {	×
70	old: Record::new(None, old_results, None),	×
71	new: Record::new(None, new_results, None),	×
72	})	×
73	}	×
74	}
75
76	impl Processor for ProjectionProcessor {
77	fn process(	461,838✔
78	&mut self,	461,838✔
79	_from_port: PortHandle,	461,838✔
80	op: Operation,	461,838✔
81	fw: &mut dyn ProcessorChannelForwarder,	461,838✔
82	_tx: &SharedTransaction,	461,838✔
83	) -> Result<(), ExecutionError> {	461,838✔
84	let _ = match op {	461,838✔
85	Operation::Delete { ref old } => fw.send(self.delete(old)?, DEFAULT_PORT_HANDLE),	2,260✔
86	Operation::Insert { ref new } => fw.send(self.insert(new)?, DEFAULT_PORT_HANDLE),	459,578✔
87	Operation::Update { ref old, ref new } => {	×
88	fw.send(self.update(old, new)?, DEFAULT_PORT_HANDLE)	×
89	}
90	};
91	Ok(())	461,530✔
92	}	461,530✔
93
94	fn commit(&self, _epoch: &Epoch, _tx: &SharedTransaction) -> Result<(), ExecutionError> {	576✔
95	Ok(())	576✔
96	}	576✔
97	}

getdozer / dozer / 4397225743

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