Expr (celesta-parent 8.1.0 API)

java.lang.Object
- ru.curs.celesta.score.Expr

Direct Known Subclasses:

BinaryTermOp, Count, FieldRef, LogicValuedExpr, Max, Min, ParameterRef, Sum
```
public abstract class Expr
extends Object
```
Scalar SQL expression.

Constructor Summary

Constructors
Constructor Description

Expr()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getCSQL()`	Returns a Celesta-SQL view of the expression.
`abstract ViewColumnMeta<?>`	`getMeta()`	Returns the expression type.
`String`	`getSQL(QueryBuildingHelper dba)`	Returns an SQL view of the expression in dialect of current DB.
`void`	`resolveFieldRefs(GrainElement ge)`	Resolves references to the fields of tables using the context of current object of the score.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Expr
```
public Expr()
```
- Method Detail
  - getCSQL
```
public final String getCSQL()
```
    Returns a Celesta-SQL view of the expression.
    
    Returns:
  - getSQL
```
public final String getSQL(QueryBuildingHelper dba)
```
    Returns an SQL view of the expression in dialect of current DB.
    
    Parameters:
    
    dba - DB adapter.
    
    Returns:
  - getMeta
```
public abstract ViewColumnMeta<?> getMeta()
```
    Returns the expression type.
    
    Returns:
  - resolveFieldRefs
```
public final void resolveFieldRefs(GrainElement ge)
                            throws ParseException
```
    Resolves references to the fields of tables using the context of current object of the score.
    
    Parameters:
    
    ge - table or view
    
    Throws:
    
    ParseException - in case if a reference can't be resolved