org.d2rq.db.expr
Class SQLExpression
java.lang.Object
org.d2rq.db.expr.Expression
org.d2rq.db.expr.SQLExpression
public class SQLExpression
- extends Expression
An Expression
defined directly by a raw SQL string.
The SQL may be just a constant expression, or it may be an alternating
list of literal parts an column parts, in which case the actual SQL
expression is formed by concatenating all parts, renaming the
columns if necessary.
- Author:
- Richard Cyganiak (richard@cyganiak.de)
create
public static Expression create(String sql,
DataType.GenericType dataType)
- Only usable for expressions that don't mention any columns
create
public static SQLExpression create(List<String> literalParts,
List<ColumnName> columns,
DataType.GenericType dataType)
- Creates a SQL expression that may contain column references.
The actual SQL expression is obtained by alternating a literal
part with a column part. There must be one more literal parts
than column parts.
isTrue
public boolean isTrue()
- Specified by:
isTrue
in class Expression
isFalse
public boolean isFalse()
- Specified by:
isFalse
in class Expression
getColumns
public Set<ColumnName> getColumns()
- Specified by:
getColumns
in class Expression
rename
public Expression rename(Renamer renamer)
- Specified by:
rename
in class Expression
toSQL
public String toSQL(DatabaseOp table,
Vendor vendor)
- Specified by:
toSQL
in class Expression
getDataType
public DataType getDataType(DatabaseOp table,
Vendor vendor)
- Specified by:
getDataType
in class Expression
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