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fix: snowflake frequently join table (#10157)

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NiharDoshi99 2023-02-09 18:05:52 +05:30 committed by GitHub
parent 5c351781f5
commit 9bb99407e5
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1 changed files with 13 additions and 5 deletions
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18
ingestion/src/metadata/ingestion/lineage/parser.py
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@ -18,7 +18,7 @@ from logging.config import DictConfigurator
from typing import Any, Dict, List, Optional, Tuple, Union
from cached_property import cached_property
from sqlparse.sql import Comparison, Identifier, Statement
from sqlparse.sql import Comparison, Identifier, Parenthesis, Statement
from metadata.generated.schema.type.tableUsageCount import TableColumn, TableColumnJoin
from metadata.ingestion.lineage.models import Dialect
@ -261,10 +261,18 @@ class LineageParser:
:param statement: Parsed sql statement to process
:return: for each table name, list all joins against other tables
"""
# Here we want to get tokens such as `tableA.col1 = tableB.col2`
comparisons = [
sub for sub in statement.get_sublists() if isinstance(sub, Comparison)
]
# Here we want to get tokens such as `(tableA.col1 = tableB.col2)`
comparisons: List[Comparison] = []
for sub in statement.get_sublists():
if isinstance(sub, Parenthesis):
sub = (
sub._groupable_tokens[0] # pylint: disable=protected-access
if len(sub._groupable_tokens) # pylint: disable=protected-access
else sub
)
if isinstance(sub, Comparison):
comparisons.append(sub)
for comparison in comparisons:
if "." not in comparison.left.value or "." not in comparison.right.value:
logger.debug(f"Ignoring comparison {comparison}")