Skip to content

Use DuckDB parquet metadata export #8

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
adsharma merged 1 commit into from
May 27, 2026
Merged

Use DuckDB parquet metadata export #8

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 7 additions & 6 deletions icebug_format/cli.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,18 +34,19 @@
from pathlib import Path

import duckdb
import pyarrow.parquet as pq

ICEBUG_DISK_VERSION = "v1"


def _write_parquet_with_icebug_metadata(con, table_name: str, output_path: Path) -> None:
"""Export a DuckDB table to parquet with icebug_disk_version metadata."""
arrow_table = con.execute(f"SELECT * FROM {table_name}").arrow().read_all()
existing_metadata = arrow_table.schema.metadata or {}
new_metadata = {**existing_metadata, b"icebug_disk_version": ICEBUG_DISK_VERSION.encode()}
arrow_table = arrow_table.replace_schema_metadata(new_metadata)
pq.write_table(arrow_table, str(output_path))
con.execute(
f"""
COPY {table_name} TO ?
(FORMAT PARQUET, KV_METADATA {{ icebug_disk_version: '{ICEBUG_DISK_VERSION}' }})
""",
[str(output_path)],
)


def parse_schema_cypher(schema_path: Path) -> dict:
Expand Down
Loading