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feat: Implement rewrite data files functionality #2

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feat: Implement rewrite data files functionality #2

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29 changes: 28 additions & 1 deletion pyiceberg/table/maintenance.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@

if TYPE_CHECKING:
from pyiceberg.table import Table
from pyiceberg.table.update.snapshot import ExpireSnapshots
from pyiceberg.table.update.snapshot import ExpireSnapshots, RewriteDataFiles


class MaintenanceTable:
Expand All @@ -43,3 +43,30 @@ def expire_snapshots(self) -> ExpireSnapshots:
from pyiceberg.table.update.snapshot import ExpireSnapshots

return ExpireSnapshots(transaction=Transaction(self.tbl, autocommit=True))

def rewrite_data_files(self) -> RewriteDataFiles:
"""Return a RewriteDataFiles builder for compaction operations.

This operation reads small data files and rewrites them into larger,
optimally-sized files. Files are selected based on size thresholds and
grouped by partition for efficient processing.

Example:
result = (
table.maintenance
.rewrite_data_files()
.filter("year = 2024") # Optional: restrict to partitions
.option("target-file-size-bytes", "134217728") # Optional: 128MB
.commit()
)

print(f"Rewrote {result.rewritten_data_files_count} files into "
f"{result.added_data_files_count} files")

Returns:
RewriteDataFiles builder for configuring and executing file compaction.
"""
from pyiceberg.table import Transaction
from pyiceberg.table.update.snapshot import RewriteDataFiles

return RewriteDataFiles(transaction=Transaction(self.tbl, autocommit=True))
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