com.caucho.db.sql
Class SubSelectEvalExpr
java.lang.Object
com.caucho.db.sql.Expr
com.caucho.db.sql.SubSelectEvalExpr
public class SubSelectEvalExpr
- extends Expr
Field Summary |
protected static L10N |
L
|
Method Summary |
int |
evalBoolean(QueryContext context)
Evaluates the expression as a boolean. |
java.lang.String |
evalString(QueryContext context)
Evaluates the expression as a string. |
java.lang.Class |
getType()
Returns the expected result type of the expression. |
long |
subCost(java.util.ArrayList<FromItem> fromList)
Returns the cost based on the given FromList. |
java.lang.String |
toString()
|
Methods inherited from class com.caucho.db.sql.Expr |
bind, cost, createOrder, evalBytes, evalDate, evalDouble, evalEqual, evalEqual, evalGroup, evalLong, evalStream, evalToBuffer, evalToBuffer, evalToResult, getIndexExpr, getName, getSQLType, getTable, getTypeCode, indexCost, indexSubCost, initGroup, isBinaryStream, isBoolean, isDouble, isLong, isNull, isNullable, isParam, isSelect, splitAnd, updateDouble, updateLong, updateString |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
L
protected static final L10N L
getType
public java.lang.Class getType()
- Returns the expected result type of the expression.
- Overrides:
getType
in class Expr
subCost
public long subCost(java.util.ArrayList<FromItem> fromList)
- Returns the cost based on the given FromList.
- Overrides:
subCost
in class Expr
evalBoolean
public int evalBoolean(QueryContext context)
throws java.sql.SQLException
- Evaluates the expression as a boolean.
- Overrides:
evalBoolean
in class Expr
- Parameters:
rows
- the current database tuple
- Returns:
- the string value
- Throws:
java.sql.SQLException
evalString
public java.lang.String evalString(QueryContext context)
throws java.sql.SQLException
- Evaluates the expression as a string.
- Overrides:
evalString
in class Expr
- Parameters:
rows
- the current database tuple
- Returns:
- the string value
- Throws:
java.sql.SQLException
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object