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java.lang.Objectorg.apache.derby.impl.sql.compile.DefaultVTIModDeferPolicy
class DefaultVTIModDeferPolicy
This class implements the default policy for defering modifications to virtual tables.
Field Summary | |
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private java.lang.String |
targetVTIClassName
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private boolean |
VTIResultSetIsSensitive
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Fields inherited from interface org.apache.derby.vti.DeferModification |
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DELETE_STATEMENT, INSERT_STATEMENT, UPDATE_STATEMENT |
Constructor Summary | |
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DefaultVTIModDeferPolicy(java.lang.String targetVTIClassName,
boolean VTIResultSetIsSensitive)
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Method Summary | |
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boolean |
alwaysDefer(int statementType)
This method is called during preparation of an insert, update, or delete statement with this VTI as the target. |
boolean |
columnRequiresDefer(int statementType,
java.lang.String columnName,
boolean inWhereClause)
This method is called during preparation of an update or delete statement on the virtual table if getResultSetType() returns ResultSet.TYPE_SCROLL_SENSITIVE or TYPE_SCROLL_SENSITIVE and alwaysDefer( statementType) returns false. |
void |
modificationNotify(int statementType,
boolean deferred)
This VTI method is called by Derby when a VTI modification (insert, update, or delete) is executed. |
boolean |
subselectRequiresDefer(int statementType,
java.lang.String VTIClassName)
This method is called during preparation of an insert, update, or delete statement that has this virtual table as its target and that has a sub-select. |
boolean |
subselectRequiresDefer(int statementType,
java.lang.String schemaName,
java.lang.String tableName)
This method is called during preparation of an insert, update, or delete statement that has this virtual table as its target and that has a sub-select. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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private final java.lang.String targetVTIClassName
private final boolean VTIResultSetIsSensitive
Constructor Detail |
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DefaultVTIModDeferPolicy(java.lang.String targetVTIClassName, boolean VTIResultSetIsSensitive)
Method Detail |
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public boolean alwaysDefer(int statementType)
DeferModification
alwaysDefer
in interface DeferModification
statementType
- One of INSERT_STATEMENT, UPDATE_STATEMENT, DELETE_STATEMENT.
DeferModification.alwaysDefer(int)
public boolean columnRequiresDefer(int statementType, java.lang.String columnName, boolean inWhereClause)
DeferModification
columnRequiresDefer
in interface DeferModification
statementType
- UPDATE_STATEMENT or DELETE_STATEMENT.columnName
- the name of one of the columns being updatedinWhereClause
- indicates whether the column also appears in the where clause
DeferModification.columnRequiresDefer(int, java.lang.String, boolean)
public boolean subselectRequiresDefer(int statementType, java.lang.String schemaName, java.lang.String tableName)
DeferModification
subselectRequiresDefer
in interface DeferModification
statementType
- the statement type: INSERT_STATEMENT, UPDATE_STATEMENT, or DELETE_STATEMENT.schemaName
- the schema of the table in the sub-select.tableName
- the name of the table in the sub-select.
DeferModification.subselectRequiresDefer(int,String,String)
public boolean subselectRequiresDefer(int statementType, java.lang.String VTIClassName)
DeferModification
subselectRequiresDefer
in interface DeferModification
statementType
- the statement type: INSERT_STATEMENT, UPDATE_STATEMENT, or DELETE_STATEMENT.VTIClassName
- the name of the class implementing the VTI in the sub-select.
DeferModification.subselectRequiresDefer(int, String)
public void modificationNotify(int statementType, boolean deferred)
DeferModification
modificationNotify
in interface DeferModification
statementType
- one of INSERT_STATEMENT, UPDATE_STATEMENT, or DELETE_STATEMENTdeferred
- true if the modification will be deferred, false if not.
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