NonStop SQL/MP Reference Manual
Table Of Contents
- What’s New in This Manual
- About This Manual
- A
- Access Options
- ADD DEFINE Command
- AGGREGATE Functions
- Alias
- ALLOCATE File Attribute
- ALTER CATALOG Statement
- ALTER COLLATION Statement
- ALTER DEFINE Command
- ALTER INDEX Statement
- ALTER PROGRAM Statement
- ALTER TABLE Statement
- ALTER VIEW Statement
- APPEND Command
- APPENDCANCEL Command
- APPENDRESTART Command
- AS Clause
- AS DATE/TIME Clause
- ASCII Character Set
- AUDIT File Attribute
- AUDITCOMPRESS File Attribute
- Audited Tables
- AVG Function
- B
- C
- CANCEL Command
- CASE Expression
- CAST Function
- CATALOG Command
- Catalogs
- CATALOGS Table
- CENTER_REPORT Option
- Character Data Types
- Character Expressions
- Character Sets
- CHAR_LENGTH Function
- CLEANUP Command
- CLEARONPURGE File Attribute
- CLOSE Statement
- Clustering Keys
- COLLATE Clause
- Collation Definitions
- Column Identifier
- Columns
- COLUMNS Table
- COMMENT Statement
- Comments
- COMMENTS Table
- COMMIT Option
- COMMIT WORK Statement
- Comparison Predicate
- COMPUTE_TIMESTAMP Function
- CONCAT Clause
- Concurrency
- Constraints
- CONSTRNT Table
- CONTINUE Statement
- CONTROL EXECUTOR Directive
- CONTROL QUERY Directive
- CONTROL TABLE Directive
- CONVERT Command
- CONVERTTIMESTAMP Function
- COPY Command
- Correlation Names
- COUNT Function
- CPRLSRCE Table
- CPRULES Table
- CREATE CATALOG Statement
- CREATE COLLATION Statement
- CREATE CONSTRAINT Statement
- CREATE INDEX Statement
- CREATE SYSTEM CATALOG Command
- CREATE TABLE Statement
- CREATE VIEW Statement
- CURRENT Function
- CURRENT_TIMESTAMP Function
- Cursors
- C89
- D
- Data Dictionary
- Data Types
- DATE Data Type
- DATE_FORMAT Option
- DATE-TIME Data Types
- DATE-TIME Functions
- DATE-TIME Literals
- DATEFORMAT Function
- DATETIME Data Type
- DAYOFWEEK Function
- DCL (Data Control Language) Statements
- DCOMPRESS File Attribute
- DDL (Data Definition Language) Statements
- Deadlocks
- DECIMAL_POINT Option
- DECLARE CURSOR Statement
- DEFAULT Clause
- DEFINEs
- DELETE DEFINE Command
- DELETE Statement
- DESCRIBE INPUT Statement
- DESCRIBE Statement
- Detail Alias
- DETAIL Command
- DISPLAY STATISTICS Command
- DISPLAY USE OF Command
- DISTINCT Clause
- DML (Data Manipulation Language) Statements
- DOWNGRADE CATALOG Command
- DOWNGRADE SYSTEM CATALOG Command
- DROP Statement
- DROP SYSTEM CATALOG Command
- DSL (Data Status Language) Statements
- DSLACK File Attribute
- DUP Command
- Dynamic SQL
- E
- F
- G
- H
- I
- ICOMPRESS File Attribute
- IF/THEN/ELSE Clause
- IN Predicate
- INCLUDE SQLCA Directive
- INCLUDE SQLDA Directive
- INCLUDE SQLSA Directive
- INCLUDE STRUCTURES Directive
- Index Keys
- INDEXES Table
- Indicator Variables and Indicator Parameters
- INFO DEFINE Command
- INITIALIZE SQL Command
- INSERT Statement
- INTERVAL Data Type
- INTERVAL Literals
- INVOKE Directive and Command
- ISLACK File Attribute
- J
- K
- L
- M
- N
- O
- P
- PAGE_COUNT Option
- PAGE FOOTING Command
- PAGE_LENGTH Option
- PAGE_NUMBER Function
- PAGE TITLE Command
- Parallel Index Loading
- Parameters
- PARTITION Clause
- Partitions
- PARTNS Table
- PERUSE Command
- Plans
- POSITION Function
- Predicates
- PREPARE Statement
- Primary Keys
- Print Item
- PROGID File Attribute
- Program Invalidation
- PROGRAMS Table
- Protection View
- PURGE Command
- PURGEDATA Command
- Q
- R
- RECLENGTH File Attribute
- RELEASE Statement
- REPORT FOOTING Command
- REPORT Option
- REPORT TITLE Command
- Report Writer
- Reserved Words
- RESET DEFINE Command
- RESET LAYOUT Command
- RESET PARAM Command
- RESET PREPARED Command
- RESET REPORT Command
- RESET SESSION Command
- RESET STYLE Command
- RESETBROKEN File Attribute
- RIGHT_MARGIN Option
- ROLLBACK WORK Statement
- ROWCOUNT Option
- S
- Sample Database
- SAVE Command
- Search Conditions
- SECURE Command
- SECURE File Attribute
- Security
- SELECT Statement
- SERIALWRITES File Attribute
- SET DEFINE Command
- SET DEFMODE Command
- SET LAYOUT Command
- SET PARAM Command
- SET SESSION Command
- SET STYLE Command
- SETSCALE Function
- Shorthand View
- SHOW CONTROL Command
- SHOW DEFINE Command
- SHOW DEFMODE Command
- SHOW LAYOUT Command
- SHOW PARAM Command
- SHOW PREPARED Command
- SHOW REPORT Command
- SHOW SESSION Command
- SHOW STYLE Command
- Similarity Checks
- SLACK File Attribute
- SPACE Option
- SQL Directive
- SQL Identifiers
- SQLCI
- SQLCI Commands
- SQLCODE
- SQLCOMP Command
- Standards Conformance
- Statements
- Static SQL
- Statistics
- Storage Management Foundation (SMF)
- String Functions
- String Literals
- Subqueries
- SUBSTRING Function
- SUBTOTAL Command
- SUBTOTAL_LABEL Option
- SUM Function
- Super ID
- Syskeys
- System Catalog
- SYSTEM Command
- System DEFINEs
- T
- U
- V
- W
- Z
- ! COMMAND
- =_AUDSERV_XSWAP_node DEFINE
- =_DEFAULTS DEFINE
- =_SORT_DEFAULTS DEFINE
- =_SQL_CAT_HEAP_LIMIT DEFINE
- =_SQL_CMP_DOUBLE_SBB_OFF DEFINE
- =_SQL_CMP_DOUBLE_SBB_ON DEFINE
- =_SQL_CMP_EQ_LIMIT DEFINE
- =_SQL_CMP_EVENT DEFINE
- =_SQL_CMP_EVENT_NO0 DEFINE
- =_SQL_CMP_NO_KS_MJOIN DEFINE
- =_SQL_cmp_node DEFINE
- =_SQL_EXE_DOUBLE_SHUTOFF DEFINE
- =_SQL_EXE_ESPS_CK_CMON DEFINE
- =_SQL_EXE_USE_SWAPVOL DEFINE
- =_SQL_MSG_node DEFINE
- =_SQL_RECGEN_node DEFINE
- =_SQL_TM_node_vol DEFINE
- Index
NonStop SQL/MP Reference Manual—142115
I-29
ISLACK File Attribute
Compare the record description in the example to the SQL-format record description
in the last example and notice the indicator variables for JOBCODE-I and
SALARY-I that are included in the COBOL85 format but not in the SQL format.
>> INVOKE $VOL1.PERSNL.EMPLOYEE AS EMP FORMAT COBOL85
+> TO COBLIB (EMPSEC);
?SECTION EMPSEC
* Definition of table \SYS1.$VOL1.PERSNL.EMPLOYEE
* Definition current at 10:50:32 - 03/01/94
01 EMP.
02 EMPNUM PIC 9(4) COMP.
02 FIRST_NAME PIC X(15)
02 LAST_NAME PIC X(20)
02 DEPTNUM PIC 9(4) COMP.
02 JOBCODE-I PIC S9(4) COMP.
02 JOBCODE PIC 9(4) COMP.
02 SALARY-I PIC S9(4) COMP.
02 SALARY PIC 9(6)V9(2) COMP.
ISLACK File Attribute
ISLACK is a file attribute that specifies the minimum percentage of space to leave for
future insertions when loading index blocks. ISLACK applies only to key-sequenced
tables and to indexes.
The default is the value of the SLACK file attribute.
The default for SLACK is 15 percent.
percent
is an integer from 0 to 99 that specifies the percent of empty space to leave in each
index block during loading.
Considerations—ISLACK
•
ISLACK specifications are usually between 15 and 25 percent.
•
Specifying a larger-than-normal ISLACK value when a file is initially loaded, and
many more inserts are expected, can improve performance by reducing the number
of block splits required when inserts occur.
ISLACK percent