DBMS_CLOUD Package Parquet to Oracle Data Type Mapping

Describes the mapping of Parquet data types to Oracle data types.

Note:

The external table supports scalar data types only. Complex types, such as maps, arrays, and structs, are not supported.

Table A-3 Parquet Data Type Support

Parquet Type Oracle Type
UINT_64 NUMBER(20)
INT_64 NUMBER(19)
UINT_32 NUMBER(10)
INT_32 NUMBER(10)
UINT_16 NUMBER(5)
INT_16 NUMBER(5)
UINT_8 NUMBER(3)
INT_8 NUMBER(3)
BOOL NUMBER(1)
UTF8 BYTE_ARRAY VARCHAR2(4000 BYTE)
FLT BINARY_FLOAT
DBL BINARY_DOUBLE
DECIMAL(p) NUMBER(p)
DECIMAL(p,s) NUMBER(p,s)
DATE DATE
STRING VARCHAR2(4000)
TIME_MILLIS VARCHAR2(20 BYTE)
TIME_MILLIS_UTC VARCHAR2(20 BYTE)
TIME_MICROS VARCHAR2(20 BYTE)
TIME_MICROS_UTC VARCHAR2(20 BYTE)
TIMESTAMP_MILLIS TIMESTAMP(3)
TIMESTAMP_MILLIS_UTC TIMESTAMP(3)
TIMESTAMP_MICROS TIMESTAMP(6)
TIMESTAMP_MICROS_UTC TIMESTAMP(6)
TIMESTAMP_NANOS TIMESTAMP(9)