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

Class PhoenixDatabaseAdapter

java.lang.Object

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

All Implemented Interfaces:

DatabaseAdapter

public final class PhoenixDatabaseAdapter
extends Object
implements DatabaseAdapter

A Apache Phoenix database adapter that generates ANSI SQL.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME

Constructor Summary

Constructors

Constructor	Description
PhoenixDatabaseAdapter()

Method Summary

Modifier and Type	Method	Description
String	getAlterTableStatement(String tableName, List<ColumnDescription> columnsToAdd)
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	getSQLForDataType(int sqlType)
String	getUpsertStatement(String table, List<String> columnNames, Collection<String> uniqueKeyColumnNames)	Returns an SQL UPSERT statement - i.e.
boolean	supportsCreateTableIfNotExists()
boolean	supportsUpsert()	Tells whether this adapter supports UPSERT.

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, getAutoCommitForReads, getCreateTableStatement, getInsertIgnoreStatement, getTableAliasClause, supportsInsertIgnore

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

Constructor Details

PhoenixDatabaseAdapter

public PhoenixDatabaseAdapter()

Method Details

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

getUpsertStatement

public String getUpsertStatement(String table,
 List<String> columnNames,
 Collection<String> uniqueKeyColumnNames)

Description copied from interface: DatabaseAdapter

Returns an SQL UPSERT statement - i.e. UPDATE record or INSERT if id doesn't exist.

There is no standard way of doing this so not all adapters support it - use together with DatabaseAdapter.supportsUpsert()!

Specified by:

getUpsertStatement in interface DatabaseAdapter

Parameters:

table - The name of the table in which to update/insert a record into.

columnNames - The name of the columns in the table to add values to.

uniqueKeyColumnNames - The name of the columns that form a unique key.

Returns:

A String containing the parameterized jdbc SQL statement. The order and number of parameters are the same as that of the provided column list.

supportsUpsert

public boolean supportsUpsert()

Description copied from interface: DatabaseAdapter

Tells whether this adapter supports UPSERT.

Specified by:

supportsUpsert in interface DatabaseAdapter

Returns:

true if UPSERT is supported, false otherwise

supportsCreateTableIfNotExists

public boolean supportsCreateTableIfNotExists()

Specified by:

supportsCreateTableIfNotExists in interface DatabaseAdapter

getAlterTableStatement

public String getAlterTableStatement(String tableName,
 List<ColumnDescription> columnsToAdd)

Specified by:

getAlterTableStatement in interface DatabaseAdapter

getSQLForDataType

public String getSQLForDataType(int sqlType)

Specified by:

getSQLForDataType in interface DatabaseAdapter