PLS-01455: The predicates IS NULL and IS NOT NULL are defined only for column specifications

PLS-01455: The predicates IS NULL and IS NOT NULL are defined only for column specifications
Cause: The predicates "IS NULL" and "IS NOT NULL" are defined only for column specifications, not for any other expressions. Section 5.15, "", indicates that in the predicate "x IS NULL", x must be a column, and may not be any other kind of expression.
Action: None

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小智 2018-08-30 19:03

PLS-01455：谓词IS NULL和IS NOT NULL仅针对列规范定义,
.原因：谓词“IS NULL”和“IS NOT NULL”仅针对列规范定义，而不是为任何其他表达式定义。第5.15节“”表示在谓词“x IS NULL”中，x必须是列，而不一定是其他类型的表达式。,
.行动：无,
.

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PLS-01455: The predicates IS NULL and IS NOT NULL are defined only for column specifications

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