Class ExasolUdf
- java.lang.Object
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- com.exasol.sql.expression.function.AbstractFunction
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- com.exasol.sql.expression.function.exasol.ExasolUdf
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- All Implemented Interfaces:
Function
,ValueExpression
public class ExasolUdf extends AbstractFunction
This class represents a User Defined Function in the Exasol database.
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Field Summary
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Fields inherited from class com.exasol.sql.expression.function.AbstractFunction
functionName, parameters
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accept(FunctionVisitor visitor)
AcceptFunctionVisitor
.Optional<ColumnsDefinition>
getEmitsColumnsDefinition()
Get a columns definition for the EMITS.boolean
hasEmitsColumnsDefinition()
Check if the EMITS part is required.boolean
hasParenthesis()
Check if function needs parenthesis.static ExasolUdf
of(String functionName, ColumnsDefinition emitsColumnsDefinition, ValueExpression... valueExpressions)
Create a newExasolUdf
instance.static ExasolUdf
of(String functionName, ValueExpression... valueExpressions)
Create a newExasolUdf
instance.-
Methods inherited from class com.exasol.sql.expression.function.AbstractFunction
accept, getFunctionName, getParameters
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Method Detail
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of
public static ExasolUdf of(String functionName, ColumnsDefinition emitsColumnsDefinition, ValueExpression... valueExpressions)
Create a newExasolUdf
instance.- Parameters:
functionName
- name of the functionemitsColumnsDefinition
- column definitions for emitsvalueExpressions
- zero or more value expressions- Returns:
- new
ExasolUdf
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of
public static ExasolUdf of(String functionName, ValueExpression... valueExpressions)
Create a newExasolUdf
instance.- Parameters:
functionName
- name of the functionvalueExpressions
- zero or more value expressions- Returns:
- new
ExasolUdf
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hasParenthesis
public boolean hasParenthesis()
Description copied from interface:Function
Check if function needs parenthesis.- Returns:
- true if function has parenthesis with parameters
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accept
public void accept(FunctionVisitor visitor)
Description copied from interface:Function
AcceptFunctionVisitor
.- Parameters:
visitor
- visitor to accept
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hasEmitsColumnsDefinition
public boolean hasEmitsColumnsDefinition()
Check if the EMITS part is required.- Returns:
- true if the EMITS part is required
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getEmitsColumnsDefinition
public Optional<ColumnsDefinition> getEmitsColumnsDefinition()
Get a columns definition for the EMITS.- Returns:
- optional of
ColumnsDefinition
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