org.apache.nifi.processors.standard.db.impl

Class MSSQLDatabaseAdapter

java.lang.Object

org.apache.nifi.processors.standard.db.impl.MSSQLDatabaseAdapter

All Implemented Interfaces:

DatabaseAdapter

Direct Known Subclasses:

MSSQL2008DatabaseAdapter

public class MSSQLDatabaseAdapter
extends Object
implements DatabaseAdapter

A database adapter that generates MS SQL Compatible SQL.

Constructor Summary

Constructors

Constructor and Description
MSSQLDatabaseAdapter()

Method Summary

Modifier and Type	Method and Description
List<String>	getAlterTableStatements(String tableName, List<ColumnDescription> columnsToAdd, boolean quoteTableName, boolean quoteColumnNames)
String	getDescription()
String	getName()
String	getSelectStatement(String tableName, String columnNames, String whereClause, String orderByClause, Long limit, Long offset) Returns a SQL SELECT statement with the given clauses applied.
String	getSelectStatement(String tableName, String columnNames, String whereClause, String orderByClause, Long limit, Long offset, String columnForPartitioning) Returns a SQL SELECT statement with the given clauses applied.
String	unwrapIdentifier(String identifier) Returns a bare identifier string by removing wrapping escape characters from identifier strings such as table and column names.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.nifi.processors.standard.db.DatabaseAdapter

generateTableName, getColumnQuoteString, getCreateTableStatement, getInsertIgnoreStatement, getSQLForDataType, getTableAliasClause, getTableQuoteString, getTimesToAddColumnObjectsForUpsert, getUpsertStatement, supportsCreateTableIfNotExists, supportsInsertIgnore, supportsUpsert

Constructor Detail

MSSQLDatabaseAdapter

public MSSQLDatabaseAdapter()

Method Detail

getName

public String getName()

Specified by:

getName in interface DatabaseAdapter

getDescription

public String getDescription()

Specified by:

getDescription in interface DatabaseAdapter

getSelectStatement

public String getSelectStatement(String tableName,
                                 String columnNames,
                                 String whereClause,
                                 String orderByClause,
                                 Long limit,
                                 Long offset)

Description copied from interface: DatabaseAdapter

Returns a SQL SELECT statement with the given clauses applied.

Specified by:

getSelectStatement in interface DatabaseAdapter

Parameters:

tableName - The name of the table to fetch rows from

columnNames - The names of the columns to fetch from the table

whereClause - The filter to apply to the statement. This should not include the WHERE keyword

orderByClause - The columns/clause used for ordering the result rows. This should not include the ORDER BY keywords

limit - The value for the LIMIT clause (i.e. the number of rows to return)

offset - The value for the OFFSET clause (i.e. the number of rows to skip)

Returns:

A String containing a SQL SELECT statement with the given clauses applied

getSelectStatement

public String getSelectStatement(String tableName,
                                 String columnNames,
                                 String whereClause,
                                 String orderByClause,
                                 Long limit,
                                 Long offset,
                                 String columnForPartitioning)

Description copied from interface: DatabaseAdapter

Returns a SQL SELECT statement with the given clauses applied. Note that if this method is overridden, the other overloaded methods need to be overridden as well, to call this method with columnForPartitioning = false

Specified by:

getSelectStatement in interface DatabaseAdapter

Parameters:

tableName - The name of the table to fetch rows from

columnNames - The names of the columns to fetch from the table

whereClause - The filter to apply to the statement. This should not include the WHERE keyword

orderByClause - The columns/clause used for ordering the result rows. This should not include the ORDER BY keywords

limit - The value for the LIMIT clause (i.e. the number of rows to return)

offset - The value for the OFFSET clause (i.e. the number of rows to skip)

columnForPartitioning - The (optional) column name that, if provided, the limit and offset values are based on values from the column itself (rather than the row number)

Returns:

A String containing a SQL SELECT statement with the given clauses applied

unwrapIdentifier

public String unwrapIdentifier(String identifier)

Description copied from interface: DatabaseAdapter

Returns a bare identifier string by removing wrapping escape characters from identifier strings such as table and column names.

The default implementation of this method removes double quotes. If the target database engine supports different escape characters, then its DatabaseAdapter implementation should override this method so that such escape characters can be removed properly.

Specified by:

unwrapIdentifier in interface DatabaseAdapter

Parameters:

identifier - An identifier which may be wrapped with escape characters

Returns:

An unwrapped identifier string, or null if the input identifier is null

getAlterTableStatements

public List<String> getAlterTableStatements(String tableName,
                                            List<ColumnDescription> columnsToAdd,
                                            boolean quoteTableName,
                                            boolean quoteColumnNames)

Specified by:

getAlterTableStatements in interface DatabaseAdapter