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nullif in datafusion::functions::core::expr_fn - Rust
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Function datafusion::functions::core::expr_fn::nullif

source · 
pub fn nullif(arg_1: Expr, arg_2: Expr) -> Expr
Expand description

returns NULL if value1 equals value2; otherwise it returns value1. This can be used to perform the inverse operation of the COALESCE expression. Return $name(arg)