spark_write_to_path(spark, identifier, df, *, storage, default_format=None, default_options=None)
Persist a Spark DataFrame to an explicit filesystem location and register it as a table.
Source code in src/fastflowtransform/storage.py
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163 | def spark_write_to_path(
spark: Any,
identifier: str,
df: Any,
*,
storage: Mapping[str, Any],
default_format: str | None = None,
default_options: Mapping[str, Any] | None = None,
) -> None:
"""
Persist a Spark DataFrame to an explicit filesystem location and register it as a table.
"""
path = storage.get("path")
if not path:
raise ValueError("storage path override requires 'path'")
fmt = storage.get("format") or default_format
options = dict(default_options or {})
extra_opts = storage.get("options") or {}
if isinstance(extra_opts, Mapping):
options.update({str(k): v for k, v in extra_opts.items()})
parts = [_sanitize_key(part) for part in identifier.split(".") if part]
if not parts:
raise ValueError(f"Invalid Spark identifier: {identifier}")
def _quote(part: str) -> str:
return "`" + part.replace("`", "``") + "`"
target_sql = ".".join(_quote(p) for p in parts)
writer = df.write.mode("overwrite")
if fmt:
writer = writer.format(fmt)
if options:
writer = writer.options(**options)
path_str = str(path)
is_local_path = "://" not in path_str
if is_local_path:
target_path = Path(path_str)
target_path.parent.mkdir(parents=True, exist_ok=True)
tmp_path = target_path.parent / f".ff_tmp_{target_path.name}_{uuid4().hex}"
if tmp_path.exists():
shutil.rmtree(tmp_path, ignore_errors=True)
try:
writer.save(str(tmp_path))
except Exception:
shutil.rmtree(tmp_path, ignore_errors=True)
raise
spark.sql(f"DROP TABLE IF EXISTS {target_sql}")
if target_path.exists():
shutil.rmtree(target_path, ignore_errors=True)
try:
tmp_path.rename(target_path)
except Exception:
shutil.rmtree(tmp_path, ignore_errors=True)
raise
else:
writer.save(path_str)
spark.sql(f"DROP TABLE IF EXISTS {target_sql}")
using_clause = f"USING {fmt}" if fmt else ""
escaped_path = path_str.replace("'", "''")
spark.sql(f"CREATE TABLE {target_sql} {using_clause} LOCATION '{escaped_path}'")
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