close()

Here’s how to use close() function.

cs .close()

Description:

Close a cursor.

Syntax:  

cs.close()

Note:  

The function clears the file handles and database connections used by cursors and their root cursors. By default, all of them will be closed automatically when fetch operation finishes.

Parameter:

cs

A cursor

Example:

	A
1	=demo.cursor("select * from SCORES")	Return a cursor of retrieved data
2	=A1.fetch(10)	Retrieve some records
3	=A1.close()	Close the cursor

Related function:

cs.fetch()

db.cursor()

db .close()

Description:

Close a datasource connection.

Syntax:

db.close()

Note:

Close a database connection. By default, data will be committed before closing the database.

Parameter:

db	Database connection, which supports esproc-JDBC source

Example:

	A
1	=connect("demo")
2	>A1.close()	Close the connection to database demo

Note:

connect and close must be used in pairs; otherwise, the connection cannot be closed.

Related function:

connect()

db.error()

db.commit()

db.rollback()

T.close()

Description:

Close a composite table.

Syntax:

T.close()

Note:

The function closes an entity table and its attached tables in a composite table. The operation is not a necessity when there isn’t a write operation.

Parameter:

T	A composite table.

Example:

	A
1	=connect("demo").cursor("select EID,NAME,GENDER,SALARY  from employee")	Return a single cusor
2	=file("emp.ctx")	Generate a composite table
3	=A2.create(#EID,NAME,GENDER,SALARY)	Create A2’s base table
4	=A3.append(A1)	Append data of A1’s cursor to the base table
5	=A3.close()	Close the composite table

T.close()

Description

Close a cluster table.

Syntax:

T.close()

Note:

The function closes a cluster table. It clears memory when T is a cluster in-memory table created by T.memory().

Parameter:

T	A cluster table

Example:

	A
1	=file("dept.ctx":[1],["192.168.0.104:8281"])
2	=A1.open()	Open a cluster table
3	=A2.attach(t1)	Return an existing attached table t1 in A2’ composite table
4	=A2.memory(DEPTID,DEPTNAME;DEPTID<10)	Generate a cluster in-memory table from table t1
5	=A2.close()	Close the cluster table and clear memory