PostgreSQL COPY → Parquet

Datatypes conversion mapping when exporting from PostgreSQL using the COPY protocol (--connectiontype pgcopy) to Parquet format.

Source	PostgreSQL COPY (pgcopy)
Format	Parquet
FastBCP	0.32.2.0
Test Status	PASS (Nullable)

info

The COPY protocol variant produces the same type mappings as the standard PostgreSQL driver. See also PostgreSQL (pgsql).

Parquet Schema: testdatatypes_nullable

name	physical_type	converted_type	logical_type
col_bigint	INT64	INT_64	IntType(bitWidth=64, isSigned=1)
col_integer	INT32	INT_32	IntType(bitWidth=32, isSigned=1)
col_smallint	INT32	INT_16	IntType(bitWidth=16, isSigned=1)
col_boolean	BOOLEAN	—	—
col_numeric	INT64	DECIMAL	DecimalType(scale=2, precision=18)
col_real	FLOAT	—	—
col_double_precision	DOUBLE	—	—
col_money	FIXED_LEN_BYTE_ARRAY	DECIMAL	DecimalType(scale=4, precision=19)
col_date	INT32	DATE	—
col_time	INT32	TIME_MILLIS	TimeType(isAdjustedToUTC=0, unit=MILLIS)
col_timestamp	INT64	TIMESTAMP_MILLIS	—
col_timestamptz	BYTE_ARRAY	UTF8	StringType()
col_interval	FIXED_LEN_BYTE_ARRAY	INTERVAL	—
col_char	BYTE_ARRAY	UTF8	StringType()
col_varchar	BYTE_ARRAY	UTF8	StringType()
col_text	BYTE_ARRAY	UTF8	StringType()
col_bytea	BYTE_ARRAY	—	—
col_uuid	BYTE_ARRAY	UTF8	StringType()
col_json	BYTE_ARRAY	UTF8	StringType()
col_jsonb	BYTE_ARRAY	—	—
col_xml	BYTE_ARRAY	UTF8	StringType()
col_inet	BYTE_ARRAY	UTF8	StringType()
col_cidr	BYTE_ARRAY	UTF8	StringType()
col_macaddr	BYTE_ARRAY	UTF8	StringType()
col_point	BYTE_ARRAY	UTF8	StringType()
col_line	BYTE_ARRAY	UTF8	StringType()
col_lseg	BYTE_ARRAY	UTF8	StringType()
col_box	BYTE_ARRAY	UTF8	StringType()
col_path	BYTE_ARRAY	UTF8	StringType()
col_polygon	BYTE_ARRAY	UTF8	StringType()
col_circle	BYTE_ARRAY	UTF8	StringType()
col_int4range	BYTE_ARRAY	UTF8	StringType()
col_int8range	BYTE_ARRAY	UTF8	StringType()
col_numrange	BYTE_ARRAY	UTF8	StringType()
col_tsrange	BYTE_ARRAY	UTF8	StringType()
col_tstzrange	BYTE_ARRAY	UTF8	StringType()
col_daterange	BYTE_ARRAY	UTF8	StringType()
col_bit	BYTE_ARRAY	UTF8	StringType()
col_bit_varying	BYTE_ARRAY	UTF8	StringType()
col_oid	BYTE_ARRAY	UTF8	StringType()
col_int_array	BYTE_ARRAY	UTF8	StringType()