Compatibility description between kingbasees and Oracle (4. SQL)

4. SQL

surface 4.1 KingbaseES and Oracle Of SQL Compatibility instructions

Serial number	function	KingbaseES	Oracle
Pseudo column
1	Hierarchical query	Support	Support
2	Sequence	Support	Support
3	ROWID	Support	Support
4	ROWNUM	Support	Support
Constant
1	CURRENT_CATALOG	Support	Support
2	CURRENT_ROLE	Support	Support
3	CURRENT_SCHEMA	Support	Support
4	CURRENT_USER	Support	Support
5	LOCALTIMESTAMP	Support	Support
6	NULL	Support	Support
7	SESSION_USER	Support	Support
8	SYSDATE	Support	Support
9	USER	Support	Support
expression
1	Common expressions	Support	Support
2	Compound expression ：(expr)、 {PRIOR}|{+}|{-} expr、 expr {*}|{/}|{+}|{–}|{||} expr、 expr COLLATE collation_name	Support	Support
3	case when	Support	Support
4	List expression ： Table column 、 Constant 、 function	Support	Support
5	cursor(subquery)	I won't support it	Support
6	Time date expression ：expr AT LOCAL、 expr AT TIME ZONE ' +– hh : mi '、 expr AT TIME ZONE、 SESSIONTIMEZONE、 expr AT TIME ZONE 'time_zone_name、 expr AT TIME ZONE expr	Support	Support
7	Custom type expression ：type_name (expr[,expr]... )	Support	Support
8	Row expression ：row_constructor operator	I won't support it	Support
Condition comparison
1	Common comparison expressions ：=、!=、^=、<>、>、<、>=、<=、 op ANY、op SOME、op ALL	Support	Support
2	The expression passes through =、!=、^=、<> These symbols Compare with expression list or subquery	Support	Support
3	Logical comparison ：NOT / AND / OR	Support	Support
4	Model comparison ：IS ANY/PRESENT	I won't support it	Support
5	Set comparison ： IS A SET/EMPTY	I won't support it	Support
6	Fuzzy matching LIKE	Support	Support
7	[NOT]BETWEEN ... AND	Support	Support
8	EXISTS(subquery)	Support	Support
9	[NOT]IN	Support	Support
10	[NOT]IS OF type	I won't support it	Support
Data object type
1	The creation of a table 、 modify 、 Delete	Support	Support
2	Partition table creation 、 Delete	Support	Support
3	Modification of partition table （add、drop、rename、truncate、 、exchange）	I won't support it	Support
4	The creation of a table space 、 modify 、 Delete	Support	Support
5	View creation 、 modify 、 Delete	Support	Support
6	Invisibility of view （VISIBLE / INVISIBLE）	I won't support it	Support
7	Custom function 、 Creation of stored procedures 、 modify 、 Delete	Support	Support
8	Package creation 、 modify 、 Delete	Support	Support
9	Indexes 、 Creation of global index 、 Delete	Support	Support
10	Index reconstruction 、 rename	Support	Support
11	Disabling indexes (ENABLEDISABLE)	Support	Support
12	The invisibility of the index （VISIBLE / INVISIBLE）	I won't support it	Support
13	Materialized view creation 、 Delete 、 modify (query_rewrite/refresh/compile)	Support	Support
14	Materialized view log The creation of 、 modify 、 Delete	I won't support it	Support
15	Trigger creation 、 modify 、 Delete	Support	Support
16	Creation of hidden columns 、 modify	Support	Support
17	Constraint creation 、 modify 、 Delete	Support	Support
18	DIRECTORY establish 、 modify 、 Delete	Support	Support
19	OPERATOR establish 、 modify 、 Delete	I won't support it	Support
20	DBLink The creation of 、 Delete	Support	Support
21	Creation of synonyms 、 Delete	Support	Support
Data object operations
1	Table query 、 Link query 、 Hierarchical query	Support	Support
2	dblink Remote query 、DML Operate homogeneous databases 、DML Operate heterogeneous databases -Oracle	Support	Support
3	MERGE surface 、 View 、 Subquery	Support	Support
4	INSERT surface 、 View 、 Subquery	Support	Support
5	INSERT ALL / FIRST	Support	Support
6	INSERT returning Clause	Support	Support
7	INSERT Subquery	Support	Support
8	INSERT error_logging Clause	I won't support it	Support
9	INSERT hint	I won't support it	Support
10	UPDATE surface 、 View 、 Subquery	Support	Support
11	Multi column update	Support	Support
12	UPDATE surface 、 View 、 Subquery	Support	Support
13	DELETE surface 、 View	Support	Support
14	DELETE returning Clause	Support	Support
15	DELETE error_logging Clause	I won't support it	Support
16	DELETE hint	I won't support it	Support
17	COPY	Support	Support
18	DELETE hint	I won't support it	Support
19	FLASHBACK database	I won't support it	Support
20	FLASHBACK surface	Support	Support