org.apache.flink.table.expressions

类 SqlCallExpression

java.lang.Object

org.apache.flink.table.expressions.SqlCallExpression

所有已实现的接口:

Expression

@PublicEvolving
public final class SqlCallExpression
extends Object
implements Expression

A call to a SQL expression.

The given string is parsed and translated into an Expression during planning. Only the translated expression is evaluated during runtime.

Note: Actually, this class belongs into the flink-table-api-java module, however, since this expression is crucial for catalogs when defining persistable computed columns and watermark strategies, we keep it in flink-table-common to keep the dependencies of catalogs low.

构造器概要

构造器

构造器和说明
SqlCallExpression(String sqlExpression)

方法概要

限定符和类型	方法和说明
<R> R	accept(ExpressionVisitor<R> visitor)
String	asSummaryString() Returns a string that summarizes this expression for printing to a console.
boolean	equals(Object o)
List<Expression>	getChildren()
String	getSqlExpression()
int	hashCode()
String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

SqlCallExpression

public SqlCallExpression(String sqlExpression)

方法详细资料

getSqlExpression

public String getSqlExpression()

asSummaryString

public String asSummaryString()

从接口复制的说明: Expression

Returns a string that summarizes this expression for printing to a console. An implementation might skip very specific properties.

指定者:

asSummaryString 在接口中 Expression

返回:

summary string of this expression for debugging purposes

getChildren

public List<Expression> getChildren()

指定者:

getChildren 在接口中 Expression

accept

public <R> R accept(ExpressionVisitor<R> visitor)

指定者:

accept 在接口中 Expression

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object