Java Doc for ExpressionVisitor.java in  » Database-DBMS » h2database » org » h2 » expression » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » h2database » org.h2.expression   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.h2.expression.ExpressionVisitor ExpressionVisitor public class ExpressionVisitor (Code) The visitor pattern is used to iterate through all expressions of a query to optimize a statement. Field Summary final public static  int DETERMINISTIC      final public static  int EVALUATABLE      final public static  int GET_DEPENDENCIES      Request to get the set of dependencies. final public static  int INDEPENDENT      final public static  int NOT_FROM_RESOLVER      final public static  int OPTIMIZABLE_MIN_MAX_COUNT_ALL      final public static  int READONLY      final public static  int SET_MAX_DATA_MODIFICATION_ID      Request to set the latest modification id.  int queryLevel      public  Table table      public  int type      Method Summary public  void addDataModificationId(long v)      public  void addDependency(DbObject obj)      public static  ExpressionVisitor get(int type)      public  HashSet getDependencies()      public  long getMaxDataModificationId()      public static  ExpressionVisitor getNotFromResolver(ColumnResolver resolver)      public  ColumnResolver getResolver()      public  void queryLevel(int offset)      public  void setDependencies(HashSet dependencies)      Field Detail DETERMINISTIC final public static int DETERMINISTIC(Code) Does the expression return the same results for the same parameters? EVALUATABLE final public static int EVALUATABLE(Code) Can the expression be evaluated, that means are all columns set to 'evaluatable'? GET_DEPENDENCIES final public static int GET_DEPENDENCIES(Code) Request to get the set of dependencies. INDEPENDENT final public static int INDEPENDENT(Code) Is the value independent on unset parameters or on columns of a higher level query, or sequence values (that means can it be evaluated right now)? NOT_FROM_RESOLVER final public static int NOT_FROM_RESOLVER(Code) Does an expression have no relation to the given table filter? OPTIMIZABLE_MIN_MAX_COUNT_ALL final public static int OPTIMIZABLE_MIN_MAX_COUNT_ALL(Code) Are all aggregates MIN(column), MAX(column), or COUNT(*)? READONLY final public static int READONLY(Code) Does the expression have no side effects (change the data)? SET_MAX_DATA_MODIFICATION_ID final public static int SET_MAX_DATA_MODIFICATION_ID(Code) Request to set the latest modification id. queryLevel int queryLevel(Code) table public Table table(Code) type public int type(Code) Method Detail addDataModificationId public void addDataModificationId(long v)(Code) addDependency public void addDependency(DbObject obj)(Code) get public static ExpressionVisitor get(int type)(Code) getDependencies public HashSet getDependencies()(Code) getMaxDataModificationId public long getMaxDataModificationId()(Code) getNotFromResolver public static ExpressionVisitor getNotFromResolver(ColumnResolver resolver)(Code) getResolver public ColumnResolver getResolver()(Code) queryLevel public void queryLevel(int offset)(Code) setDependencies public void setDependencies(HashSet dependencies)(Code) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)