Data type conversion table: Informix to PostgreSQL
| Informix® data types | PostgreSQL data types (since 8.4) |
|---|---|
CHAR(n) |
CHAR(n) |
VARCHAR(n[,m]) |
VARCHAR(n) |
LVARCHAR(n[,m]) |
VARCHAR(n) |
NCHAR(n) |
N/A |
NVARCHAR(n[,m]) |
N/A |
BOOLEAN |
BOOLEAN |
SMALLINT |
INT2 |
INTEGER |
INT4 |
BIGINT |
BIGINT |
INT8 |
BIGINT |
SERIAL[(start)] |
INTEGER (see note 1) |
BIGSERIAL[(start)] |
BIGINT (see note 1) |
SERIAL8[(start)] |
BIGINT (see note 1) |
DOUBLE PRECISION / FLOAT[(n)] |
FLOAT4 |
REAL / SMALLFLOAT |
FLOAT8 |
DECIMAL(p,s) |
DECIMAL(p,s) |
DECIMAL(p) |
DECIMAL (no precision = floating point) |
DECIMAL |
DECIMAL (no precision = floating point) |
MONEY(p,s) |
DECIMAL(p,s) |
MONEY(p) |
DECIMAL(p,2) |
MONEY |
DECIMAL(16,2) |
DATE |
DATE |
DATETIME HOUR TO MINUTE |
TIME(0) WITHOUT TIME ZONE |
DATETIME HOUR TO SECOND |
TIME(0) WITHOUT TIME ZONE |
DATETIME HOUR TO FRACTION(p) |
TIME(p) WITHOUT TIME ZONE |
DATETIME YEAR TO MONTH |
TIMESTAMP(0) WITHOUT TIME ZONE |
DATETIME YEAR TO DAY |
TIMESTAMP(0) WITHOUT TIME ZONE |
DATETIME YEAR TO HOUR |
TIMESTAMP(0) WITHOUT TIME ZONE |
DATETIME YEAR TO MINUTE |
TIMESTAMP(0) WITHOUT TIME ZONE |
DATETIME YEAR TO SECOND |
TIMESTAMP(0) WITHOUT TIME ZONE |
DATETIME YEAR TO FRACTION(p) |
TIMESTAMP(p) WITHOUT TIME ZONE |
INTERVAL YEAR[(p)] TO MONTH |
INTERVAL YEAR TO MONTH |
INTERVAL YEAR[(p)] TO YEAR |
INTERVAL YEAR |
INTERVAL MONTH[(p)] TO MONTH |
INTERVAL MONTH |
INTERVAL DAY[(p)] TO FRACTION(n) |
INTERVAL DAY TO SECOND(n) |
INTERVAL DAY[(p)] TO SECOND |
INTERVAL DAY TO SECOND(0) |
INTERVAL DAY[(p)] TO MINUTE |
INTERVAL DAY TO MINUTE |
INTERVAL DAY[(p)] TO HOUR |
INTERVAL DAY TO HOUR |
INTERVAL DAY[(p)] TO DAY |
INTERVAL DAY |
INTERVAL HOUR[(p)] TO FRACTION(n) |
INTERVAL HOUR TO SECOND(n) |
INTERVAL HOUR[(p)] TO SECOND |
INTERVAL HOUR TO SECOND(0) |
INTERVAL HOUR[(p)] TO MINUTE |
INTERVAL HOUR TO MINUTE |
INTERVAL HOUR[(p)] TO HOUR |
INTERVAL HOUR |
INTERVAL MINUTE[(p)] TO FRACTION(n) |
INTERVAL MINUTE TO SECOND(n) |
INTERVAL MINUTE[(p)] TO SECOND |
INTERVAL MINUTE TO SECOND(0) |
INTERVAL MINUTE[(p)] TO MINUTE |
INTERVAL MINUTE |
INTERVAL SECOND[(p)] TO FRACTION(n) |
INTERVAL SECOND(n) |
INTERVAL SECOND[(p)] TO SECOND |
INTERVAL SECOND(0) |
INTERVAL FRACTION[(p)] TO FRACTION(n) |
INTERVAL SECOND(n) |
TEXT |
TEXT |
BYTE |
BYTEA |
Notes:
- For more details about serial emulation, see SERIAL and BIGSERIAL data types.