#832

Committed 12 Oct 2023 08:31AM UTC coverage: 0.0% (-68.5%) from 68.493%

Build # #832

Build Type

push

circle-ci

Committed by

xzdandy

Commit Message

Minor

Run Details

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/evadb/executor/seq_scan_executor.py

# coding=utf-8
# Copyright 2018-2023 EvaDB
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Iterator

from evadb.database import EvaDBDatabase
from evadb.executor.abstract_executor import AbstractExecutor
from evadb.executor.executor_utils import (
    apply_predicate,
    apply_project,
    instrument_function_expression_cost,
)
from evadb.models.storage.batch import Batch
from evadb.plan_nodes.seq_scan_plan import SeqScanPlan


class SequentialScanExecutor(AbstractExecutor):
    """
    Applies predicates to filter the frames which satisfy the condition
    Arguments:
        node (AbstractPlan): The SequentialScanPlan

    """

    def __init__(self, db: EvaDBDatabase, node: SeqScanPlan):
        super().__init__(db, node)
        self.predicate = node.predicate
        self.project_expr = node.columns
        self.alias = node.alias

    def exec(self, *args, **kwargs) -> Iterator[Batch]:
        child_executor = self.children[0]
        for batch in child_executor.exec(**kwargs):
            # apply alias to the batch
            # id, data -> myvideo.id, myvideo.data
            if self.alias:
                batch.modify_column_alias(self.alias)

            # We do the predicate first
            batch = apply_predicate(batch, self.predicate)
            # Then do project
            batch = apply_project(batch, self.project_expr)

            if not batch.empty():
                yield batch

        # instrument required stats
        if self.predicate or self.project_expr:
            catalog = self.catalog()
            instrument_function_expression_cost(self.predicate, catalog)
            instrument_function_expression_cost(self.project_expr, catalog)

1	# coding=utf-8
2	# Copyright 2018-2023 EvaDB
3	#
4	# Licensed under the Apache License, Version 2.0 (the "License");
5	# you may not use this file except in compliance with the License.
6	# You may obtain a copy of the License at
7	#
8	# http://www.apache.org/licenses/LICENSE-2.0
9	#
10	# Unless required by applicable law or agreed to in writing, software
11	# distributed under the License is distributed on an "AS IS" BASIS,
12	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13	# See the License for the specific language governing permissions and
14	# limitations under the License.
15	from typing import Iterator	×
16
17	from evadb.database import EvaDBDatabase	×
18	from evadb.executor.abstract_executor import AbstractExecutor	×
19	from evadb.executor.executor_utils import (	×
20	apply_predicate,
21	apply_project,
22	instrument_function_expression_cost,
23	)
24	from evadb.models.storage.batch import Batch	×
25	from evadb.plan_nodes.seq_scan_plan import SeqScanPlan	×
26
27
28	class SequentialScanExecutor(AbstractExecutor):	×
29	"""
30	Applies predicates to filter the frames which satisfy the condition
31	Arguments:
32	node (AbstractPlan): The SequentialScanPlan
33
34	"""
35
36	def __init__(self, db: EvaDBDatabase, node: SeqScanPlan):	×
37	super().__init__(db, node)	×
38	self.predicate = node.predicate	×
39	self.project_expr = node.columns	×
40	self.alias = node.alias	×
41
42	def exec(self, args, *kwargs) -> Iterator[Batch]:	×
43	child_executor = self.children[0]	×
44	for batch in child_executor.exec(**kwargs):	×
45	# apply alias to the batch
46	# id, data -> myvideo.id, myvideo.data
47	if self.alias:	×
48	batch.modify_column_alias(self.alias)	×
49
50	# We do the predicate first
51	batch = apply_predicate(batch, self.predicate)	×
52	# Then do project
53	batch = apply_project(batch, self.project_expr)	×
54
55	if not batch.empty():	×
56	yield batch	×
57
58	# instrument required stats
59	if self.predicate or self.project_expr:	×
60	catalog = self.catalog()	×
61	instrument_function_expression_cost(self.predicate, catalog)	×
62	instrument_function_expression_cost(self.project_expr, catalog)	×

georgia-tech-db / eva / #832

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