org.pentaho.di.core.database

Class SnowflakeHVDatabaseMeta

java.lang.Object

org.pentaho.di.core.database.BaseDatabaseMeta

org.pentaho.di.core.database.SnowflakeHVDatabaseMeta

All Implemented Interfaces:

Cloneable, DatabaseInterface, DatabaseInterfaceExtended

public class SnowflakeHVDatabaseMeta
extends BaseDatabaseMeta
implements DatabaseInterface

Field Summary

Fields

Modifier and Type	Field and Description
static String	WAREHOUSE

Fields inherited from class org.pentaho.di.core.database.BaseDatabaseMeta

ATTRIBUTE_CLUSTER_DBNAME_PREFIX, ATTRIBUTE_CLUSTER_HOSTNAME_PREFIX, ATTRIBUTE_CLUSTER_PASSWORD_PREFIX, ATTRIBUTE_CLUSTER_PORT_PREFIX, ATTRIBUTE_CLUSTER_USERNAME_PREFIX, ATTRIBUTE_FORCE_IDENTIFIERS_TO_LOWERCASE, ATTRIBUTE_FORCE_IDENTIFIERS_TO_UPPERCASE, ATTRIBUTE_INITIAL_POOL_SIZE, ATTRIBUTE_IS_CLUSTERED, ATTRIBUTE_MAXIMUM_POOL_SIZE, ATTRIBUTE_MSSQL_DOUBLE_DECIMAL_SEPARATOR, ATTRIBUTE_POOLING_PARAMETER_PREFIX, ATTRIBUTE_PORT_NUMBER, ATTRIBUTE_PREFERRED_SCHEMA_NAME, ATTRIBUTE_PREFIX_EXTRA_OPTION, ATTRIBUTE_PRESERVE_RESERVED_WORD_CASE, ATTRIBUTE_QUOTE_ALL_FIELDS, ATTRIBUTE_SQL_CONNECT, ATTRIBUTE_SUPPORTS_BOOLEAN_DATA_TYPE, ATTRIBUTE_SUPPORTS_TIMESTAMP_DATA_TYPE, ATTRIBUTE_USE_POOLING, ATTRIBUTE_USE_RESULT_STREAMING, AUTOINCREMENT_SQL_FOR_BATCH_ID, poolingParameters, releaseSavepoint, SELECT_COUNT_STATEMENT, SEQUENCE_FOR_BATCH_ID

Constructor Summary

Constructors

Constructor and Description
SnowflakeHVDatabaseMeta()

Method Summary

Modifier and Type	Method and Description
int[]	getAccessTypeList() Get the list of possible access types for a database.
String	getAddColumnStatement(String tablename, ValueMetaInterface v, String tk, boolean useAutoinc, String pk, boolean semicolon) Generates the SQL statement to add a column to the specified table
int	getDefaultDatabasePort()
Map<String,String>	getDefaultOptions()
String	getDriverClass() Obtain the name of the JDBC driver class that we need to use!
String	getDropColumnStatement(String tablename, ValueMetaInterface v, String tk, boolean useAutoinc, String pk, boolean semicolon) Generates the SQL statement to drop a column from the specified table
String	getExtraOptionIndicator()
String	getExtraOptionSeparator()
String	getExtraOptionsHelpText()
String	getFieldDefinition(ValueMetaInterface v, String surrogateKey, String primaryKey, boolean useAutoinc, boolean addFieldname, boolean addCr) Describe a Value as a field in the database.
String	getLimitClause(int nrRows)
String	getModifyColumnStatement(String tableName, ValueMetaInterface v, String tk, boolean useAutoinc, String pk, boolean semicolon) Generates the SQL statement to modify a column in the specified table
int	getNotFoundTK(boolean useAutoinc) Get the not found technical key.
String[]	getReservedWords()
String	getSQLColumnExists(String columnname, String tablename)
String	getSQLInsertAutoIncUnknownDimensionRow(String schemaTable, String keyField, String versionField) Get the SQL to insert a new empty unknown record in a dimension.
String	getSQLListOfSchemas()
String	getSQLQueryColumnFields(String columnname, String tableName)
String	getSQLQueryFields(String tableName) Returns the minimal SQL to launch in order to determine the layout of the resultset for a given database table
String	getSQLTableExists(String tablename)
String	getURL(String hostname, String port, String databaseName)
String[]	getUsedLibraries()
boolean	isFetchSizeSupported() Checks whether or not the command setFetchSize() is supported by the JDBC driver...
boolean	isRequiringTransactionsOnQueries()
String	quoteSQLString(String string) Adds quotes around the string according to the database dialect and also escapes special characters like CR, LF and the quote character itself.
boolean	releaseSavepoint() Returns a true of savepoints can be released, false if not.
boolean	supportsBitmapIndex()
boolean	supportsErrorHandlingOnBatchUpdates()
boolean	supportsIndexes()
boolean	supportsRepository()
boolean	supportsSynonyms()
boolean	supportsTimeStampToDateConversion()
boolean	supportsTransactions()
boolean	supportsViews()

Methods inherited from class org.pentaho.di.core.database.BaseDatabaseMeta

addAttribute, addDefaultOptions, addExtraOption, canTest, checkIndexExists, clone, customizeValueFromSQLType, fullExceptionLog, generateColumnAlias, getAccessType, getAttribute, getAttributes, getBackwardsCompatibleSchemaTableCombination, getBackwardsCompatibleTable, getConnectionPoolingProperties, getConnectSQL, getCreateTableStatement, getDatabaseFactoryName, getDatabaseName, getDatabasePortNumberString, getDataTablespace, getDataTablespaceDDL, getDisplayName, getDropTableIfExistsStatement, getEndQuote, getExtraOptions, getExtraOptionValueSeparator, getFieldnameProtector, getFunctionAverage, getFunctionCount, getFunctionMaximum, getFunctionMinimum, getFunctionSum, getHostname, getIndexTablespace, getIndexTablespaceDDL, getInitialPoolSize, getInitialPoolSizeString, getMaxColumnsInIndex, getMaximumPoolSize, getMaximumPoolSizeString, getMaxTextFieldLength, getMaxVARCHARLength, getName, getNextBatchId, getNextBatchIdUsingAutoIncSQL, getNextBatchIdUsingLockTables, getNextBatchIdUsingSequence, getObjectId, getPartitioningInformation, getPassword, getPluginId, getPluginName, getPreferredSchemaName, getSafeFieldname, getSchemaTableCombination, getSelectCountStatement, getSequenceNoMaxValueOption, getServername, getSQLCurrentSequenceValue, getSQLListOfProcedures, getSQLListOfSequences, getSQLLockTables, getSQLNextSequenceValue, getSqlScriptStatements, getSQLSequenceExists, getSQLUnlockTables, getSQLValue, getStartQuote, getSynonymTypes, getTablespaceDDL, getTableTypes, getTruncateTableStatement, getUsername, getValueFromResultSet, getViewTypes, getXulOverlayFile, isChanged, isDefaultingToUppercase, isDisplaySizeTwiceThePrecision, isExplorable, isForcingIdentifiersToLowerCase, isForcingIdentifiersToUpperCase, isMySQLVariant, isPartitioned, isQuoteAllFields, isStreamingResults, isSystemTable, isUsingConnectionPool, isUsingDoubleDecimalAsSchemaTableSeparator, needsPlaceHolder, needsToLockAllTables, onlySpaces, parseStatements, preserveReservedCase, quoteReservedWords, requiresCastToVariousForIsNull, requiresCreateTablePrimaryKeyAppend, requiresName, setAccessType, setAttributes, setChanged, setConnectionPoolingProperties, setConnectSQL, setDatabaseName, setDatabasePortNumberString, setDataTablespace, setDisplayName, setForcingIdentifiersToLowerCase, setForcingIdentifiersToUpperCase, setHostname, setIndexTablespace, setInitialPoolSize, setInitialPoolSizeString, setMaximumPoolSize, setMaximumPoolSizeString, setName, setObjectId, setPartitioned, setPartitioningInformation, setPassword, setPluginId, setPluginName, setPreferredSchemaName, setPreserveReservedCase, setQuoteAllFields, setServername, setStreamingResults, setSupportsBooleanDataType, setSupportsTimestampDataType, setUsername, setUsingConnectionPool, setUsingDoubleDecimalAsSchemaTableSeparator, supportsAutoGeneratedKeys, supportsAutoInc, supportsBatchUpdates, supportsBooleanDataType, supportsCatalogs, supportsEmptyTransactions, supportsErrorHandling, supportsFloatRoundingOnUpdate, supportsGetBlob, supportsNewLinesInSQL, supportsOptionsInURL, supportsPreparedStatementMetadataRetrieval, supportsResultSetMetadataRetrievalOnly, supportsSchemas, supportsSequenceNoMaxValueOption, supportsSequences, supportsSetCharacterStream, supportsSetLong, supportsSetMaxRows, supportsTimestampDataType, useSafePoints, useSchemaNameForTableList

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.pentaho.di.core.database.DatabaseInterface

addAttribute, addDefaultOptions, addExtraOption, checkIndexExists, clone, createSqlScriptParser, customizeValueFromSQLType, generateColumnAlias, getAccessType, getAttribute, getAttributes, getConnectionPoolingProperties, getConnectSQL, getCreateTableStatement, getDatabaseFactoryName, getDatabaseName, getDatabasePortNumberString, getDataTablespace, getDataTablespaceDDL, getDisplayName, getEndQuote, getExtraOptions, getExtraOptionValueSeparator, getFunctionAverage, getFunctionCount, getFunctionMaximum, getFunctionMinimum, getFunctionSum, getHostname, getIndexTablespace, getIndexTablespaceDDL, getInitialPoolSize, getInitialPoolSizeString, getLegacyColumnName, getMaxColumnsInIndex, getMaximumPoolSize, getMaximumPoolSizeString, getMaxTextFieldLength, getMaxVARCHARLength, getName, getNextBatchId, getObjectId, getPartitioningInformation, getPassword, getPluginId, getPluginName, getPreferredSchemaName, getSafeFieldname, getSchemaTableCombination, getSelectCountStatement, getSequenceNoMaxValueOption, getServername, getSQLCurrentSequenceValue, getSQLListOfProcedures, getSQLListOfSequences, getSQLLockTables, getSQLNextSequenceValue, getSqlScriptStatements, getSQLSequenceExists, getSQLUnlockTables, getSQLValue, getStartQuote, getSynonymTypes, getTableTypes, getTruncateTableStatement, getUnsupportedTableOutputMessage, getUsername, getValueFromResultSet, getViewTypes, getXulOverlayFile, isChanged, isDefaultingToUppercase, isDisplaySizeTwiceThePrecision, isExplorable, isForcingIdentifiersToLowerCase, isForcingIdentifiersToUpperCase, isMySQLVariant, isPartitioned, isQuoteAllFields, isStreamingResults, isSystemTable, isUsingConnectionPool, isUsingDoubleDecimalAsSchemaTableSeparator, needsPlaceHolder, needsToLockAllTables, parseStatements, preserveReservedCase, quoteReservedWords, requiresCastToVariousForIsNull, requiresCreateTablePrimaryKeyAppend, setAccessType, setAttributes, setChanged, setConnectionPoolingProperties, setConnectSQL, setDatabaseName, setDatabasePortNumberString, setDataTablespace, setDisplayName, setForcingIdentifiersToLowerCase, setForcingIdentifiersToUpperCase, setHostname, setIndexTablespace, setInitialPoolSize, setInitialPoolSizeString, setMaximumPoolSize, setMaximumPoolSizeString, setName, setObjectId, setPartitioned, setPartitioningInformation, setPassword, setPluginId, setPluginName, setPreferredSchemaName, setPreserveReservedCase, setQuoteAllFields, setServername, setStreamingResults, setSupportsBooleanDataType, setSupportsTimestampDataType, setUsername, setUsingConnectionPool, setUsingDoubleDecimalAsSchemaTableSeparator, supportsAutoGeneratedKeys, supportsAutoInc, supportsBatchUpdates, supportsBooleanDataType, supportsCatalogs, supportsEmptyTransactions, supportsErrorHandling, supportsFloatRoundingOnUpdate, supportsGetBlob, supportsNewLinesInSQL, supportsOptionsInURL, supportsPreparedStatementMetadataRetrieval, supportsResultSetMetadataRetrievalOnly, supportsSchemas, supportsSequenceNoMaxValueOption, supportsSequences, supportsSetCharacterStream, supportsSetLong, supportsSetMaxRows, supportsStandardTableOutput, supportsTimestampDataType, useSafePoints, useSchemaNameForTableList

Field Detail

WAREHOUSE

public static final String WAREHOUSE

See Also:

Constant Field Values

Constructor Detail

SnowflakeHVDatabaseMeta

public SnowflakeHVDatabaseMeta()

Method Detail

getAccessTypeList

public int[] getAccessTypeList()

Description copied from interface: DatabaseInterface

Get the list of possible access types for a database.

Specified by:

getAccessTypeList in interface DatabaseInterface

Specified by:

getAccessTypeList in class BaseDatabaseMeta

Returns:

the list of possible access types for a database.

getDefaultDatabasePort

public int getDefaultDatabasePort()

Specified by:

getDefaultDatabasePort in interface DatabaseInterface

Overrides:

getDefaultDatabasePort in class BaseDatabaseMeta

Returns:

the default database port number

getDefaultOptions

public Map<String,String> getDefaultOptions()

Specified by:

getDefaultOptions in interface DatabaseInterface

Overrides:

getDefaultOptions in class BaseDatabaseMeta

Returns:

default extra Options

isFetchSizeSupported

public boolean isFetchSizeSupported()

Description copied from class: BaseDatabaseMeta

Checks whether or not the command setFetchSize() is supported by the JDBC driver...

Specified by:

isFetchSizeSupported in interface DatabaseInterface

Overrides:

isFetchSizeSupported in class BaseDatabaseMeta

Returns:

true is setFetchSize() is supported!

getDriverClass

public String getDriverClass()

Description copied from interface: DatabaseInterface

Obtain the name of the JDBC driver class that we need to use!

Specified by:

getDriverClass in interface DatabaseInterface

Returns:

the name of the JDBC driver class for the specific database

getURL

public String getURL(String hostname,
                     String port,
                     String databaseName)

Specified by:

getURL in interface DatabaseInterface

Parameters:

hostname - the hostname

port - the port as a string

databaseName - the database name

Returns:

the URL to use for connecting to the database.

getAddColumnStatement

public String getAddColumnStatement(String tablename,
                                    ValueMetaInterface v,
                                    String tk,
                                    boolean useAutoinc,
                                    String pk,
                                    boolean semicolon)

Generates the SQL statement to add a column to the specified table

Specified by:

getAddColumnStatement in interface DatabaseInterface

Parameters:

tablename - The table to add

v - The column defined as a value

tk - the name of the technical key field

useAutoinc - whether or not this field uses auto increment

pk - the name of the primary key field

semicolon - whether or not to add a semi-colon behind the statement.

Returns:

the SQL statement to add a column to the specified table

getDropColumnStatement

public String getDropColumnStatement(String tablename,
                                     ValueMetaInterface v,
                                     String tk,
                                     boolean useAutoinc,
                                     String pk,
                                     boolean semicolon)

Generates the SQL statement to drop a column from the specified table

Specified by:

getDropColumnStatement in interface DatabaseInterface

Overrides:

getDropColumnStatement in class BaseDatabaseMeta

Parameters:

tablename - The table to add

v - The column defined as a value

tk - the name of the technical key field

useAutoinc - whether or not this field uses auto increment

pk - the name of the primary key field

semicolon - whether or not to add a semi-colon behind the statement.

Returns:

the SQL statement to drop a column from the specified table

getSQLListOfSchemas

public String getSQLListOfSchemas()

Specified by:

getSQLListOfSchemas in interface DatabaseInterface

Overrides:

getSQLListOfSchemas in class BaseDatabaseMeta

Returns:

the SQL to retrieve the list of schemas or null if the JDBC metadata needs to be used.

getModifyColumnStatement

public String getModifyColumnStatement(String tableName,
                                       ValueMetaInterface v,
                                       String tk,
                                       boolean useAutoinc,
                                       String pk,
                                       boolean semicolon)

Generates the SQL statement to modify a column in the specified table

Specified by:

getModifyColumnStatement in interface DatabaseInterface

Parameters:

tableName - The table to add

v - The column defined as a value

tk - the name of the technical key field

useAutoinc - whether or not this field uses auto increment

pk - the name of the primary key field

semicolon - whether or not to add a semi-colon behind the statement.

Returns:

the SQL statement to modify a column in the specified table

getFieldDefinition

public String getFieldDefinition(ValueMetaInterface v,
                                 String surrogateKey,
                                 String primaryKey,
                                 boolean useAutoinc,
                                 boolean addFieldname,
                                 boolean addCr)

Description copied from interface: DatabaseInterface

Describe a Value as a field in the database.

Specified by:

getFieldDefinition in interface DatabaseInterface

Parameters:

v - The value to describe

surrogateKey - The field that's going to be the technical key

primaryKey - The field that's going to be the primary key

useAutoinc - Use autoincrement or not

addFieldname - Add the fieldname to the definition or not

addCr - Add a cariage return at the end of the definition or not.

Returns:

a value described as a field in this database.

getUsedLibraries

public String[] getUsedLibraries()

Specified by:

getUsedLibraries in interface DatabaseInterface

Returns:

the required libraries (in lib) for this database connection.

getLimitClause

public String getLimitClause(int nrRows)

Specified by:

getLimitClause in interface DatabaseInterface

Overrides:

getLimitClause in class BaseDatabaseMeta

Parameters:

nrRows - The number of rows to which we want to limit the result of the query.

Returns:

the clause after a select statement to limit the number of rows

getSQLQueryFields

public String getSQLQueryFields(String tableName)

Returns the minimal SQL to launch in order to determine the layout of the resultset for a given database table

Specified by:

getSQLQueryFields in interface DatabaseInterface

Overrides:

getSQLQueryFields in class BaseDatabaseMeta

Parameters:

tableName - The name of the table to determine the layout for

Returns:

The SQL to launch.

getSQLTableExists

public String getSQLTableExists(String tablename)

Specified by:

getSQLTableExists in interface DatabaseInterface

Overrides:

getSQLTableExists in class BaseDatabaseMeta

Parameters:

tablename - The table to verify the existance for

Returns:

The SQL to execute to verify if the given table exists. If an Exception is thrown for this SQL, we don't have the table.

getSQLColumnExists

public String getSQLColumnExists(String columnname,
                                 String tablename)

Specified by:

getSQLColumnExists in interface DatabaseInterface

Overrides:

getSQLColumnExists in class BaseDatabaseMeta

Parameters:

columnname - The column to verify the existance for

tablename - The table to verify the existance for

Returns:

The SQL to execute to verify if the given table exists. If an Exception is thrown for this SQL, we don't have the column.

getSQLQueryColumnFields

public String getSQLQueryColumnFields(String columnname,
                                      String tableName)

getNotFoundTK

public int getNotFoundTK(boolean useAutoinc)

Description copied from interface: DatabaseInterface

Get the not found technical key.

Specified by:

getNotFoundTK in interface DatabaseInterface

Overrides:

getNotFoundTK in class BaseDatabaseMeta

Parameters:

useAutoinc - Whether or not we want to use an auto increment field

Returns:

the lowest possible technical key to be used as the NOT FOUND row in a slowly changing dimension.

See Also:

DatabaseInterface.getNotFoundTK(boolean)

getExtraOptionSeparator

public String getExtraOptionSeparator()

Specified by:

getExtraOptionSeparator in interface DatabaseInterface

Overrides:

getExtraOptionSeparator in class BaseDatabaseMeta

Returns:

The extra option separator in database URL for this platform (usually this is semicolon ; )

getExtraOptionIndicator

public String getExtraOptionIndicator()

Specified by:

getExtraOptionIndicator in interface DatabaseInterface

Overrides:

getExtraOptionIndicator in class BaseDatabaseMeta

Returns:

This indicator separates the normal URL from the options

supportsTransactions

public boolean supportsTransactions()

Specified by:

supportsTransactions in interface DatabaseInterface

Overrides:

supportsTransactions in class BaseDatabaseMeta

Returns:

true if the database supports transactions.

supportsTimeStampToDateConversion

public boolean supportsTimeStampToDateConversion()

Specified by:

supportsTimeStampToDateConversion in interface DatabaseInterface

Overrides:

supportsTimeStampToDateConversion in class BaseDatabaseMeta

Returns:

true if the database supports timestamp to date conversion. For example Interbase doesn't support this!

supportsBitmapIndex

public boolean supportsBitmapIndex()

Specified by:

supportsBitmapIndex in interface DatabaseInterface

Overrides:

supportsBitmapIndex in class BaseDatabaseMeta

Returns:

true if the database supports bitmap indexes

supportsViews

public boolean supportsViews()

Specified by:

supportsViews in interface DatabaseInterface

Overrides:

supportsViews in class BaseDatabaseMeta

Returns:

true if the database supports views

supportsSynonyms

public boolean supportsSynonyms()

Specified by:

supportsSynonyms in interface DatabaseInterface

Overrides:

supportsSynonyms in class BaseDatabaseMeta

Returns:

true if the database supports synonyms

getReservedWords

public String[] getReservedWords()

Specified by:

getReservedWords in interface DatabaseInterface

Overrides:

getReservedWords in class BaseDatabaseMeta

Returns:

an array of reserved words for the database type...

getExtraOptionsHelpText

public String getExtraOptionsHelpText()

Specified by:

getExtraOptionsHelpText in interface DatabaseInterface

Overrides:

getExtraOptionsHelpText in class BaseDatabaseMeta

Returns:

extra help text on the supported options on the selected database platform.

getSQLInsertAutoIncUnknownDimensionRow

public String getSQLInsertAutoIncUnknownDimensionRow(String schemaTable,
                                                     String keyField,
                                                     String versionField)

Get the SQL to insert a new empty unknown record in a dimension.

Specified by:

getSQLInsertAutoIncUnknownDimensionRow in interface DatabaseInterface

Overrides:

getSQLInsertAutoIncUnknownDimensionRow in class BaseDatabaseMeta

Parameters:

schemaTable - the schema-table name to insert into

keyField - The key field

versionField - the version field

Returns:

the SQL to insert the unknown record into the SCD.

supportsIndexes

public boolean supportsIndexes()

Specified by:

supportsIndexes in interface DatabaseInterface

Returns:

true if the database supports indexes at all. (Exasol and Snowflake do not)

quoteSQLString

public String quoteSQLString(String string)

Description copied from interface: DatabaseInterface

Adds quotes around the string according to the database dialect and also escapes special characters like CR, LF and the quote character itself.

Specified by:

quoteSQLString in interface DatabaseInterface

Overrides:

quoteSQLString in class BaseDatabaseMeta

Parameters:

string - The String to escape

Returns:

A string that is properly quoted for use in a SQL statement (insert, update, delete, etc)

releaseSavepoint

public boolean releaseSavepoint()

Description copied from class: BaseDatabaseMeta

Returns a true of savepoints can be released, false if not.

Specified by:

releaseSavepoint in interface DatabaseInterface

Overrides:

releaseSavepoint in class BaseDatabaseMeta

Returns:

supportsErrorHandlingOnBatchUpdates

public boolean supportsErrorHandlingOnBatchUpdates()

Specified by:

supportsErrorHandlingOnBatchUpdates in interface DatabaseInterface

Overrides:

supportsErrorHandlingOnBatchUpdates in class BaseDatabaseMeta

Returns:

true if the database supports error handling (recovery of failure) while doing batch updates.

isRequiringTransactionsOnQueries

public boolean isRequiringTransactionsOnQueries()

Specified by:

isRequiringTransactionsOnQueries in interface DatabaseInterface

Overrides:

isRequiringTransactionsOnQueries in class BaseDatabaseMeta

Returns:

true if this database needs a transaction to perform a query (auto-commit turned off).

supportsRepository

public boolean supportsRepository()

Specified by:

supportsRepository in interface DatabaseInterface

Overrides:

supportsRepository in class BaseDatabaseMeta

Returns:

true if Kettle can create a repository on this type of database.