Preface
The Transformation Language
Constants
Operators
Variables
Dates
Functions
- Function Categories
  - Aggregate Functions
  - Aggregate Functions and Nulls
    - Filter Conditions
  - Binary Functions
  - Character Functions
  - Conversion Functions
  - Data Cleansing Functions
  - Date Functions
  - Encoding Functions
  - Financial Functions
  - Numeric Functions
  - Scientific Functions
  - Special Functions
  - String Functions
  - Test Functions
  - Variable Functions
  - Window Functions
- ABORT
- ABS
- ADD_TO_DATE
- AES_DECRYPT
- AES_ENCRYPT
- ASCII
- AVG
- BINARY_COMPARE
- BINARY_CONCAT
- BINARY_LENGTH
- BINARY_SECTION
- CEIL
- CHOOSE
- CHR
- CHRCODE
- COMPRESS
- CONCAT
- CONVERT_BASE
- COS
- COSH
- COUNT
- CRC32
- CUME
- DATE_COMPARE
- DATE_DIFF
- DEC_BASE64
- DEC_HEX
- DECODE
- DECOMPRESS
- EBCDIC_ISO88591
- ENC_BASE64
- ENC_HEX
- ERROR
- EXP
- FIRST
- FLOOR
- FV
- GET_DATE_PART
- GREATEST
- IIF
- IN
- INDEXOF
- INITCAP
- INSTR
- ISNULL
- IS_DATE
- IS_NUMBER
- IS_SPACES
- LAG
- LAST
- LAST_DAY
- LEAD
- LEAST
- LENGTH
- LN
- LOG
- LOOKUP
- LOWER
- LPAD
- LTRIM
- MAKE_DATE_TIME
- MAX (Dates)
- MAX (Numbers)
- MAX (String)
- MD5
- MEDIAN
- METAPHONE
- MIN (Dates)
- MIN (Numbers)
- MIN (String)
- MOD
- MOVINGAVG
- MOVINGSUM
- NPER
- PERCENTILE
- PMT
- POWER
- PV
- RAND
- RATE
- REG_EXTRACT
- REG_MATCH
- REG_REPLACE
- REPLACECHR
- REPLACESTR
- REVERSE
- ROUND (Dates)
- ROUND (Numbers)
- RPAD
- RTRIM
- SETCOUNTVARIABLE
- SET_DATE_PART
- SETMAXVARIABLE
- SETMINVARIABLE
- SETVARIABLE
- SHA256
- SIGN
- SIN
- SINH
- SOUNDEX
- SQRT
- STDDEV
- SUBSTR
- SUM
- SYSTIMESTAMP
- TAN
- TANH
- TIME_RANGE
- TO_BIGINT
- TO_CHAR (Dates)
- TO_CHAR (Numbers)
- TO_DATE
- TO_DECIMAL
- TO_FLOAT
- TO_INTEGER
- TRUNC (Dates)
- TRUNC (Numbers)
- UPPER
- VARIANCE
Creating Custom Functions
Custom Function API Reference

Transformation Language Reference

10.5
- 10.5.6
- 10.5.1
- 10.4.0

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User Interface Validation Function

When PowerCenter calls INFA_EXPR_ValidateGetUserInterface, the plug-in returns function pointers to the validation functions.

Use the following syntax:

INFA_EXPR_STATUS INFA_EXPR_ValidateGetUserInterface( IUNICHAR* sNamespace, IUNICHAR* sFuncName, INFA_EXPR_VALIDATE_METHODS* functions);

Argument	Datatype	Input/ Output	Description
sNamespace	IUNICHAR	Input	Namespace of the custom function.
sFuncName	IUNICHAR	Input	Name of the custom function.
functions	INFA_EXPR_VALIDATE_METHODS	Output	Pointers to different functions called during validation and reporting.

The return datatype is

INFA_EXPR_STATUS

. Use ISUCCESS and IFAILURE as the return value. When the function returns IFAILURE, the plug-in did not implement the function or another error occurred.

INFA_EXPR_ValidateGetUserInterface returns the following functions:

validateFunction.
Validates a custom function.

getFunctionDescription.
Describes a custom function.

getFunctionPrototype.
Provides the prototype for a custom function.

pushdownFunction.
Generates SQL code for pushdown optimization.

Common APIs

Custom Function Validation Function

Custom Function Description Function

Custom Function Prototype Function

Custom Function Pushdown Function

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