兼容Oracle内置函数列表

EMPTY_BLOB

EMPTY_CLOB

NVL

NVL2

TRUNC

NUMERIC_AND

NUMERIC_OR

ASCII

RTRIM

CHR

LOWER

CONCAT

LPAD

CONCAT

LTRIM

TRANSLATE

INITCAP

REPLACE

TRIM

INSTR

RPAD

UPPER

CAST

CONVERT

ADD_MONTHS

LOCALTIMESTAMP

SYSDATE

CURRENT_DATE

MONTHS_BETWEEN

CURRENT_TIMESTAMP

NEXT_DAY

LAST_DAY

ROUND

STDDEV

ASIN

ATAN

LN

SQRT

ATAN2

DENSE_RANK

POWER

TANH

AVG

EXP

RANK

TRUNC

BITAND

EXTRACT

ROUND

SIGN

BITOR

VARIANCE

BITXOR

LEAST

SQLCODE

SQLERRM

DECODE

NULLIF

COALESCE

LAG

CURRENT_USER

LEAD

WMSYS.WM_CONCAT

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