databasemetadata.java

gcc3.2.1源代码

  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsPositionedDelete() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not that database supports positioned
  * updates.
  *
  * @return <code>true</code> if positioned updates are supported,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsPositionedUpdate() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not SELECT FOR UPDATE is supported by the
  * database.
  *
  * @return <code>true</code> if SELECT FOR UPDATE is supported 
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsSelectForUpdate() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not stored procedures are supported on
  * this database.
  *
  * @return <code>true</code> if stored procedures are supported,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsStoredProcedures() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not subqueries are allowed in comparisons.
  * A fully JDBC compliant driver will always return <code>true</code>.
  *
  * @return <code>true</code> if subqueries are allowed in comparisons,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsSubqueriesInComparisons() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not subqueries are allowed in exists
  * expressions.  A fully JDBC compliant driver will always return
  * <code>true</code>.
  *
  * @return <code>true</code> if subqueries are allowed in exists 
  * expressions, <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsSubqueriesInExists() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether subqueries are allowed in IN statements.
  * A fully JDBC compliant driver will always return <code>true</code>.
  *
  * @return <code>true</code> if the driver supports subqueries in IN
  * statements, <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsSubqueriesInIns() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not subqueries are allowed in quantified
  * expressions.  A fully JDBC compliant driver will always return
  * <code>true</code>.
  *
  * @return <code>true</code> if subqueries are allowed in quantified 
  * expressions, <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsSubqueriesInQuantifieds() throws SQLException;

/*************************************************************************/

/**
  * This method test whether or not correlated subqueries are allowed. A
  * fully JDBC compliant driver will always return <code>true</code>.
  *
  * @return <code>true</code> if correlated subqueries are allowed,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsCorrelatedSubqueries() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the UNION statement is supported.
  *
  * @return <code>true</code> if UNION is supported, <code>false</code>
  * otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsUnion() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the UNION ALL statement is supported.
  *
  * @return <code>true</code> if UNION ALL is supported, <code>false</code>
  * otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsUnionAll() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the database supports cursors
  * remaining open across commits.
  *
  * @return <code>true</code> if cursors can remain open across commits,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsOpenCursorsAcrossCommit() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the database supports cursors
  * remaining open across rollbacks.
  *
  * @return <code>true</code> if cursors can remain open across rollbacks,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsOpenCursorsAcrossRollback() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the database supports statements
  * remaining open across commits.
  *
  * @return <code>true</code> if statements can remain open across commits,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsOpenStatementsAcrossCommit() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the database supports statements
  * remaining open across rollbacks.
  *
  * @return <code>true</code> if statements can remain open across rollbacks,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
supportsOpenStatementsAcrossRollback() throws SQLException;

/*************************************************************************/

/**
  * This method returns the number of hex characters allowed in an inline
  * binary literal.
  *
  * @return The number of hex characters allowed in a binary literal, 0 meaning
  * either an unknown or unlimited number.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxBinaryLiteralLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of a character literal.
  * 
  * @return The maximum length of a character literal.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxCharLiteralLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of a column name.
  *
  * @return The maximum length of a column name.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxColumnNameLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of columns in a GROUP BY statement.
  *
  * @return The maximum number of columns in a GROUP BY statement.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxColumnsInGroupBy() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of columns in an index.
  *
  * @return The maximum number of columns in an index.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxColumnsInIndex() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of columns in an ORDER BY statement.
  *
  * @return The maximum number of columns in an ORDER BY statement.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxColumnsInOrderBy() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of columns in a SELECT statement.
  *
  * @return The maximum number of columns in a SELECT statement.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxColumnsInSelect() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of columns in a table.
  *
  * @return The maximum number of columns in a table.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxColumnsInTable() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of connections this client
  * can have to the database.
  *
  * @return The maximum number of database connections.
  *
  * @SQLException If an error occurs.
  */
public abstract int
getMaxConnections() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of a cursor name.
  *
  * @return The maximum length of a cursor name.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxCursorNameLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of an index.
  *
  * @return The maximum length of an index.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxIndexLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of a schema name.
  *
  * @return The maximum length of a schema name.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxSchemaNameLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of a procedure name.
  *
  * @return The maximum length of a procedure name.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxProcedureNameLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum length of a catalog name.
  *
  * @return The maximum length of a catalog name.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxCatalogNameLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum size of a row in bytes.
  *
  * @return The maximum size of a row.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxRowSize() throws SQLException;

/*************************************************************************/

/**
  * This method tests whether or not the maximum row size includes BLOB's
  *
  * @return <code>true</code> if the maximum row size includes BLOB's,
  * <code>false</code> otherwise.
  *
  * @exception SQLException If an error occurs.
  */
public abstract boolean
doesMaxRowSizeIncludeBlobs() throws SQLException;

/*************************************************************************/

/**
  * This method includes the maximum length of a SQL statement.
  *
  * @return The maximum length of a SQL statement.
  *
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxStatementLength() throws SQLException;

/*************************************************************************/

/**
  * This method returns the maximum number of statements that can be
  * active at any time.
  *
  * @return The maximum number of statements that can be active at any time.
  * 
  * @exception SQLException If an error occurs.
  */
public abstract int
getMaxStatements() throws SQLException;

/*************************************************************************/

/**