SqlCallExpression (Flink : 2.0-preview1 API)

java.lang.Object
- org.apache.flink.table.expressions.SqlCallExpression

All Implemented Interfaces:

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.

Constructor Summary

Constructors
Constructor Description

SqlCallExpression(String sqlExpression)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<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()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - SqlCallExpression
```
public SqlCallExpression(String sqlExpression)
```
- Method Detail
  - getSqlExpression
```
public String getSqlExpression()
```
  - asSummaryString
```
public String asSummaryString()
```
    Description copied from interface: Expression
    
    Returns a string that summarizes this expression for printing to a console. An implementation might skip very specific properties.
    
    Specified by:
    
    asSummaryString in interface Expression
    
    Returns:
    
    summary string of this expression for debugging purposes
  - getChildren
```
public List<Expression> getChildren()
```
    Specified by:
    
    getChildren in interface Expression
  - accept
```
public <R> R accept(ExpressionVisitor<R> visitor)
```
    Specified by:
    
    accept in interface Expression
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object