Compatibility description between kingbasees and Oracle (2. Data type)

2.  data type

2.1. KingbaseES Data type to Oracle Data type conversion

surface 2.1.2 KingbaseES Data type to Oracle Data type conversion

Serial number	KingbaseES data type	Oracle data type	Remarks （KingbaseES）
Numerical type
1	tinyint	NUMBER	Single byte integer -128 to +127
2	smallint	NUMBER	A small range of integers -32768 to +32767
3	integer	NUMBER	A typical choice of integers -2147483648 to [phone]
4	bigint	NUMBER	Large range integers -9223372036854775808 to +9223372036854775807
5	decimal	NUMBER	user Specify the precision , accurate Before the highest decimal point 131072 position , as well as After the decimal point 16383 position
6	numeric, number	NUMBER	user Specify the precision , accurate Before the highest decimal point 131072 position , as well as After the decimal point 16383 position
7	real	FLOAT	can Variable precision , Imprecise 6 Decimal precision
8	float	FLOAT
9	double precision, double	FLOAT	8 byte can Variable precision , Imprecise 15 Decimal precision
10	smallserial	NUMBER	since Small integer of dynamic increase 1 To 32767
11	serial	NUMBER	Automatically incremented integer 1 To 2147483647
12	bigserial	NUMBER	Single byte integer +1 to +9223372036854775807
Character
1	character (n[char | byte]), char(n[char | byte])	CHAR/CLOB	Fixed length , Maximum To 8000, Fill in the blank charge . When the length is small On 1000 When you change to CHAR, When the length exceeds 1000 Convert to CLOB
2	character varying(n[char | byte]), varchar(n[char | byte]), varchar2(n[char | byte])	VARCHAR2/CLOB	Limited lengthening , Maximum to 8000. When The length is not greater than 2000 When you change to CHAR, When The length exceeds 2000 Convert to CLOB
3	text	CLOB	Infinite length
Large object types
1	clob	CLOB	Character large object
2	bytea	BLOB	Variable length binary string
3	blob	BLOB	Binary big object
Date time
1	timestamp [ (p) ] [ without time zone ]	TIMESTAMP	Date and Time （ No time zone ）
2	timestamp [ (p) ] with time zone	TIMESTAMP() WITH TIME ZONE	Include date And time , Time zone
3	date	DATE	date
4	time [ (p) ] [ without time zone ]	DATE	Time of day
5	time [ (p) ] with time zone	DATE	Just one day Time , With time zone
6	interval year	NUMBER	The time interval
7	interval month	NUMBER	The time interval
8	interval day	NUMBER	The time interval
9	interval hour	NUMBER	The time interval
10	interval minute	NUMBER	The time interval
11	interval second	FLOAT	The time interval
12	interval year to month	INTERVAL YEAR() TO MONTH	The time interval
13	interval day to second	INTERVAL DAY() TO SECOND	The time interval
Boolean type
1	boolean	NUMBER	The state is true or false
Bit string type
1	bit(n) bit varying(n)	BLOB	a string 1 and 0 String of
XML type
1	xml	XMLTYPE	Used to store XML data
JSON type
1	JSON	JSON	Used to store JSON data

2.2. Oracle Data type to KingbaseES Data type conversion

surface 2.2.4 Oracle Data type to KingbaseES Data type conversion

Serial number	Oracle data type	KingbaseES data type	remarks explain （Oracle）
Numerical type
1	NUMBER(p,s)	numeric (precision, scale)	1.0 x |image16| To 1.0 x |image17|
2	FLOAT	double	Number Subtypes of
3	BINARY_FLOAT	double	4 byte , Single-precision floating-point
4	BINARY_DOUBLE	double	8 byte , Double precision floating point
Character
1	CHAR	char	Fixed length string
2	VARCHAR2	varchar	Variable length string
3	NCHAR	char	Unicode Encoded string
4	NVARCHAR2	varchar	Unicode Encoded string
Date time
1	DATE	timestamp [ (p) ] [ without time zone ]	The date type
2	TIMESTAMP WITH TIME ZONE	timestamp [ (p) ] [ without time zone ]	Time type
3	TIMESTAMP() WITH TIME ZONE	timestamp [ (p) ] with time zone	Time type with time zone
4	TIMESTAMP() WITH LOCAL TIME ZONE	timestamp [ (p) ] with time zone	Time type with local time zone
5	INTERVAL DAY() TO SECOND	interval year to month	The time interval
6	INTERVAL YEAR() TO MONTH	interval day to second	The time interval
Large object types
1	BLOB	blob	Binary big object
2	CLOB	clob	Character large object
3	NCLOB	clob	Storage Unicode data
Other types
1	LONG	text	Store variable length strings
2	RAW	bytea	Store character data
3	LONG RAW	bytea	Store binary data such as images, documents, sounds
4	ROWID	varchar	length 64, Can be stored A-Z, a-z, 0-9, + /
5	UROWID	varchar	Storage Index -organized surface And the address of the external table