Java SQL types (java.sql.Types.*) are converted to Avro types according to the following table.
When applicable and --useAvroLogicalTypes parameter is set to true, Avro logical types are used.
To represent nullable columns, unions with the Avro NULL type are used.
| Java SQL type | Avro type | Avro schema annotations | Comments |
|---|---|---|---|
| BIGINT | long / string | Depends on a SQL column precision | |
| INTEGER | int | ||
| SMALLINT | int | ||
| TINYINT | int | ||
| TIMESTAMP | long | logicalType: time-millis | |
| DATE | long | logicalType: time-millis | |
| TIME | long | logicalType: time-millis | |
| TIME_WITH_TIMEZONE | long | logicalType: time-millis | |
| BOOLEAN | boolean | ||
| BIT | boolean / bytes | Depends on a SQL column precision | |
| BINARY | bytes | ||
| BINARY | bytes | ||
| VARBINARY | bytes | ||
| LONGVARBINARY | bytes | ||
| ARRAY | bytes | ||
| BLOB | bytes | ||
| DOUBLE | double | ||
| FLOAT | float | ||
| REAL | float | ||
| VARCHAR | string | ||
| CHAR | string | ||
| CLOB | string | ||
| LONGNVARCHAR | string | ||
| LONGVARCHAR | string | ||
| NCHAR | string | ||
| all other Java SQL types | string |