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
- 10.5.1
- 10.4.0

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Custom Function Pushdown Function

PowerCenter calls pushdownFunction to generate SQL code for pushdown optimization.

Use the following syntax:

INFA_EXPR_STATUS pushdownFunctionEcho(IUNICHAR* sNameSpace,
                     IUNICHAR* sFuncName,
                     IUINT32 numArgs,
                     INFA_EXPR_OPD_METADATA** inputArgList,
                     EDatabaseType dbType,
                     EPushdownMode pushdownMode,
                     IUNICHAR** sGenSql)

Argument	Datatype	Input/Output	Description
sNameSpace	IUNICHAR	Input	Namespace of the function.
sFuncName	IUNICHAR	Input	Name of the custom function to validate.
numArgs	IUNINT32	Input	Number of arguments in the custom function.
inputArgList	INFA_EXPR_OPD_METADATA	Input	Input arguments of the custom function.
dbType	EDatabaseType	Input	Database type.
pushdownMode	EPushdownMode	Input	Type of pushdown optimization.
sGenSql	IUNICHAR	Output	SQL generated by the custom function.

The return datatype is

INFA_EXPR_STATUS

. Use ISUCCESS and IFAILURE as the return value. When the function returns IFAILURE, PowerCenter displays an error message.

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Table of Contents

Transformation Language Reference

Transformation Language Reference

Custom Function Pushdown Function

Custom Function Pushdown Function