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更新时间：2023-03-17 GMT+08:00
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数学函数

**

输入：**

1
 
expr1 ** expr2

输出

1
 
expr1 ^ expr2

MOD

输入：MOD

1
 
expr1 MOD expr2

输出

1
 
 expr1 % expr2

NULLIFZERO

可以使用tdMigrateNULLIFZERO参数来配置NULLIFZERO迁移。

输入：NULLIFZERO 
1
2
 
SELECT NULLIFZERO(expr1) FROM tab1 
WHERE … ;

输出

1
2
 
SELECT NULLIF(expr1, 0) FROM tab1 
 WHERE … ;

ZEROIFNULL

可以使用tdMigrateZEROIFNULL参数来配置ZEROIFNULL迁移。

输入：ZEROIFNULL 
1
2
 
SELECT ZEROIFNULL(expr1) FROM tab1 
WHERE … ;

输出

1
2
 
SELECT COALESCE(expr1, 0) FROM tab1 
 WHERE … ;

声明Hexadecimal Character Literal值

输入

SELECT 
 (COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.ID),''))
 ||'7E'xc||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Code),''))
 ||'7E'xc||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Description),''))
 ||'7E'xc||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Name),''))
 ||'7E'xc||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Host_Product_Id),''))
FROM DP_VTXEDW.VTX_D_RPT_0017_WMSE12_01_01   VTX_D_RPT_0017_WMSE12_01_01
WHERE 1=1
;

输出

SELECT 
 (COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.ID),''))
 ||E'\x7E'||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Code),''))
 ||E'\x7E'||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Description),''))
 ||E'\x7E'||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Name),''))
 ||E'\x7E'||(COALESCE(TRIM(BOTH FROM VTX_D_RPT_0017_WMSE12_01_01.Host_Product_Id),''))
FROM DP_VTXEDW.VTX_D_RPT_0017_WMSE12_01_01   VTX_D_RPT_0017_WMSE12_01_01
WHERE 1=1
;

声明Hexadecimal Binary Literal值

输入

CREATE MULTISET TABLE bvalues (IDVal INTEGER, CodeVal BYTE(2));
INSERT INTO bvalues VALUES (112193, '7879'XB) ;
SELECT IDVal, CodeVal FROM bvalues WHERE CodeVal = '7879'XB ;

输出

CREATE TABLE bvalues (IDVal INTEGER, CodeVal BYTEA);
INSERT INTO bvalues VALUES (112193, BYTEA '\x7879') ;
SELECT IDVal, CodeVal FROM bvalues WHERE CodeVal = BYTEA '\x7879' ;
父主题： Teradata语法迁移