15
DBMS_IOT

The DBMS_IOT package creates a table into which references to the chained rows for an index organized table can be placed using the ANALYZE command. It can also create an exception table into which rows of an index-organized table that violate a constraint can be placed during the enable_constraint operation.

Summary of Subprograms

Table 15-1 DBMS_IOT Package Subprograms

BUILD_CHAIN_ROWS_TABLE 
procedure

BUILD_EXCEPTIONS_TABLE 
procedure

BUILD_CHAIN_ROWS_TABLE procedure

The BUILD_CHAIN_ROWS_TABLE procedure creates a table into which references to the chained rows for an index-organized table can be placed using the ANALYZE command.

Syntax

DBMS_IOT.BUILD_CHAIN_ROWS_TABLE (
   owner               IN VARCHAR2,
   iot_name            IN VARCHAR2,
   chainrow_table_name IN VARCHAR2 default 'IOT_CHAINED_ROWS');

Parameters

Table 15-2 BUILD_CHAIN_ROWS_TABLE Procedure Parameters

owner

iot_name

chainrow_table_name

Example

CREATE TABLE l(a char(16),b char(16), c char(16), d char(240), 
PRIMARY KEY(a,b,c)) ORGANIZATION INDEX pctthreshold 10 overflow;    
EXECUTE DBMS_IOT.BUILD_CHAIN_ROWS_TABLE('SYS','L','LC');  

A chained-row table is created with the following columns:

Column Name                    Null?    Type  
------------------------------ -------- ----  
OWNER_NAME                              VARCHAR2(30)  
TABLE_NAME                              VARCHAR2(30)  
CLUSTER_NAME                            VARCHAR2(30)  
PARTITION_NAME                          VARCHAR2(30)  
SUBPARTITION_NAME                       VARCHAR2(30)  
HEAD_ROWID                              ROWID  
TIMESTAMP                               DATE  
A                                       CHAR(16)  
B                                       CHAR(16)  
C                                       CHAR(16) 

BUILD_EXCEPTIONS_TABLE procedure

The BUILD_EXCEPTIONS_TABLE procedure creates an exception table into which rows of an index-organized table that violate a constraint can be placed during the enable_constraint operation.

A separate chained-rows table and an exception table should be created for each index-organized table to accommodate its primary key.

Syntax

DBMS_IOT.BUILD_EXCEPTIONS_TABLE (
   owner                 IN VARCHAR2,
   iot_name              IN VARCHAR2,
   exceptions_table_name IN VARCHAR2 default 'IOT_EXCEPTIONS');

Parameters

Table 15-3 BUILD_EXCEPTIONS_TABLE Procedure Parameters

owner

iot_name

exceptions_table_name

Example

EXECUTE DBMS_IOT.BUILD_EXCEPTIONS_TABLE('SYS','L','LE');  
  

An exception table for the above index-organized table with the following columns:

Column Name                    Null?    Type  
------------------------------ -------- ----  
ROW_ID                                  VARCHAR2(30)  
OWNER                                   VARCHAR2(30)  
TABLE_NAME                              VARCHAR2(30)  
CONSTRAINT                              VARCHAR2(30)  
A                                       CHAR(16)  
B                                       CHAR(16)  
C                                       CHAR(16)