Package dev.frostlake.metastore.model

Class DefaultValueExpression

java.lang.Object

dev.frostlake.metastore.model.DefaultValueExpression

public final class DefaultValueExpression
extends Object

A column DEFAULT whose value is a non-literal expression (arithmetic, string concatenation, a function call, CASE, …) rather than a stored constant. It holds the raw expression text and is evaluated once per inserted row at INSERT time — not stored verbatim as the column value.

This wrapper exists to disambiguate an expression default from a literal string default: both would otherwise be a bare String on TableColumn.defaultValue, so a DEFAULT (1+2) was previously inserted as the text "1+2" instead of 3. A literal default stays its plain value; only expression defaults are wrapped. toString() returns the expression text so metadata views (SHOW COLUMNS, INFORMATION_SCHEMA, snapshots) render the original expression.

Constructor Summary

Constructors

Constructor	Description
DefaultValueExpression(String expressionText)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)
String	getExpressionText()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

DefaultValueExpression

public DefaultValueExpression(String expressionText)

Method Details

getExpressionText

public String getExpressionText()

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object