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Big data & Spark

PySpark jobs, partitioning, batch processing, and large-dataset transform patterns.

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Mock Predicate Pushdown in Python for Big Data Queries

Simulate predicate pushdown by applying filters at the storage layer before materializing rows, showing how big data engines optimize queries.

big-data query-optimization predicate-pushdown
Python 
class Query:
    def __init__(self, table, rows):
        self.table = table
        self.rows = rows

    def filter(self, predicate):
        return Query(
            self.table,
            [row for row in self.rows if all(predicate(row) for predicate in predicate)]
        )

    def filter_pushdown(self, predica…
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