Contents

About DB2 UDB for iSeries SQL Reference

Standards compliance

Who should read the SQL Reference

How to use this book

Assumptions relating to examples of SQL statements

How to read the syntax diagrams

Conventions used in this book

SQL accessibility

What's new for V5R4

Relational database

Structured Query Language

Extended Dynamic SQL

Interactive SQL

SQL Call Level Interface (CLI) and Open Database Connectivity (ODBC)

Java DataBase Connectivity (JDBC) and embedded SQL for Java (SQLJ) programs

OLE DB and ADO (ActiveX Data Object)

User-defined types

Packages and access plans

Authorization, privileges and object ownership

Application processes, concurrency, and recovery

Locking, commit, and rollback

Rolling back work

Isolation level

Repeatable read

Cursor stability

Uncommitted read

Comparison of isolation levels

Storage Structures

Character conversion

Character sets and code pages

Coded character sets and CCSIDs

Distributed relational database

Application servers

CONNECT (Type 1) and CONNECT (Type 2)

Remote unit of work

Application-directed distributed unit of work

Data representation considerations

Language elements

SQL identifiers

System identifiers

Host identifiers

Naming conventions

Qualification of unqualified object names

SQL names and system names: special considerations

Authorization IDs and authorization names

Character strings

Character encoding schemes

Graphic strings

Graphic encoding schemes

Limitations on use of strings

Datetime values

DataLink values

User-defined types

Promotion of data types

Casting between data types

Assignments and comparisons

Numeric assignments

String assignments

Datetime assignments

DataLink assignments

Row ID assignments

Distinct type assignments

Assignments to LOB locators

Numeric comparisons

String comparisons

Datetime comparisons

DataLink comparisons

Row ID comparisons

Distinct type comparisons

Rules for result data types

Numeric operands

Character and graphic string operands

Binary string operands

Datetime operands

DataLink operands

Distinct type operands

Conversion rules for operations that combine strings

Integer constants

Floating-point constants

Decimal constants

Character-string constants

Graphic-string constants

Binary-string constants

Datetime constants

Special registers

CURRENT DEBUG MODE

CURRENT TIMESTAMP

CURRENT TIMEZONE

Qualified column names

Correlation names

Column name qualifiers to avoid ambiguity

Column name qualifiers in correlated references

Unqualified column names in correlated references

References to variables

References to host variables

Variables in dynamic SQL

References to LOB variables

References to LOB locator variables

References to LOB file reference variables

Host structures

Host structure arrays

Types of functions

Function invocation

Function resolution

Determining the best fit

Best fit considerations

Without operators

With arithmetic operators

With the concatenation operator

Scalar fullselect

Datetime operands and durations

Datetime arithmetic in SQL

Precedence of operations

CASE expressions

CAST specification

OLAP specifications

Sequence reference

Basic predicate

Quantified predicate

BETWEEN predicate

DISTINCT predicate

EXISTS predicate

Search conditions

Built-in functions

Aggregate functions

STDDEV_POP or STDDEV

VAR_POP or VARIANCE or VAR

VARIANCE_SAMP or VAR_SAMP

Scalar functions

CHARACTER_LENGTH

DATAPARTITIONNAME

DATAPARTITIONNUM

DBPARTITIONNAME

DECRYPT_BIT, DECRYPT_BINARY, DECRYPT_CHAR and DECRYPT_DB

DOUBLE_PRECISION or DOUBLE

GENERATE_UNIQUE

IDENTITY_VAL_LOCAL

MIDNIGHT_SECONDS

POSITION or POSSTR

SUBSTRING or SUBSTR

TRUNCATE or TRUNC

group-by-clause

Examples of a subselect

Rules for columns

Examples of a fullselect

select-statement

common-table-expression

order-by-clause

fetch-first-clause

read-only-clause

optimize-clause

isolation-clause

Examples of a select-statement

How SQL statements are invoked

Embedding a statement in an application program

Dynamic preparation and execution

Static invocation of a select-statement

Dynamic invocation of a select-statement

Interactive invocation

SQL return codes

ALLOCATE DESCRIPTOR

ALTER PROCEDURE (External)

ALTER PROCEDURE (SQL)

ADD COLUMN column-definition

ALTER COLUMN column-alteration

ADD unique-constraint

ADD referential-constraint

ADD check-constraint

ADD partitioning-clause

DROP PARTITIONING

ALTER PARTITION

ADD MATERIALIZED QUERY materialized-query-definition

ALTER MATERIALIZED QUERY materialized-query-table-alteration

DROP MATERIALIZED QUERY

ACTIVATE NOT LOGGED INITIALLY

VOLATILE or NOT VOLATILE

Cascaded Effects

BEGIN DECLARE SECTION

CONNECT (Type 1)

CONNECT (Type 2)

CREATE DISTINCT TYPE

CREATE FUNCTION

CREATE FUNCTION (External Scalar)

CREATE FUNCTION (External Table)

CREATE FUNCTION (Sourced)

CREATE FUNCTION (SQL Scalar)

CREATE FUNCTION (SQL Table)

CREATE PROCEDURE

CREATE PROCEDURE (External)

CREATE PROCEDURE (SQL)

CREATE SEQUENCE

column-definition

as-subquery-clause

unique-constraint

referential-constraint

check-constraint

NOT LOGGED INITIALLY

VOLATILE or NOT VOLATILE

distribution-clause

partitioning-clause

Rules for System Name Generation

DEALLOCATE DESCRIPTOR

DECLARE GLOBAL TEMPORARY TABLE

column-definition

as-subquery-clause

DECLARE PROCEDURE

DECLARE STATEMENT

DECLARE VARIABLE

END DECLARE SECTION

EXECUTE IMMEDIATE

multiple-row-fetch

GET DIAGNOSTICS

GRANT (Distinct Type Privileges)

GRANT (Function or Procedure Privileges)

GRANT (Package Privileges)

GRANT (Sequence Privileges)

GRANT (Table or View Privileges)

insert-multiple-rows

RELEASE (Connection)

RELEASE SAVEPOINT

REVOKE (Distinct Type Privileges)

REVOKE (Function or Procedure Privileges)

REVOKE (Package Privileges)

REVOKE (Sequence Privileges)

REVOKE (Table or View Privileges)

SET CURRENT DEBUG MODE

SET CURRENT DEGREE

SET ENCRYPTION PASSWORD

SET RESULT SETS

SET SESSION AUTHORIZATION

SET TRANSACTION

SET transition-variable

SQL control statements

References to SQL parameters and SQL variables

SQL-procedure-statement

assignment-statement

compound-statement

GET DIAGNOSTICS statement

ITERATE statement

LEAVE statement

REPEAT statement

RESIGNAL statement

RETURN statement

SIGNAL statement

WHILE statement

Appendix A. SQL limits

Appendix B. Characteristics of SQL statements

Actions allowed on SQL statements

SQL statement data access indication in routines

Considerations for using distributed relational database

CONNECT (Type 1) and CONNECT (Type 2) differences

Appendix C. SQLCA (SQL communication area)

Field descriptions

INCLUDE SQLCA declarations

Appendix D. SQLDA (SQL descriptor area)

Field descriptions in an SQLDA header

Determining how many SQLVAR occurrences are needed

Field descriptions in an occurrence of SQLVAR

Fields in an occurrence of a base SQLVAR

Fields in an occurrence of a secondary SQLVAR

SQLTYPE and SQLLEN

CCSID values in SQLDATA or SQLNAME

Unrecognized and unsupported SQLTYPES

INCLUDE SQLDA declarations

Appendix E. CCSID values

Appendix F. DB2 UDB for iSeries catalog views

iSeries catalog tables and views

ODBC and JDBC catalog views

SQLCOLPRIVILEGES

SQLPROCEDURECOLS

SQLSPECIALCOLUMNS

SQLTABLEPRIVILEGES

ANS and ISO catalog views

CHECK_CONSTRAINTS

INFORMATION_SCHEMA_CATALOG_NAME

REFERENTIAL_CONSTRAINTS

TABLE_CONSTRAINTS

USER_DEFINED_TYPES

Appendix G. Terminology differences

Appendix H. Reserved schema names and reserved words

Reserved schema names

Related information

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