org.ofbiz.core.entity.jdbc.dbtype

Class Oracle10GDatabaseType

java.lang.Object

org.ofbiz.core.entity.jdbc.dbtype.AbstractDatabaseType

org.ofbiz.core.entity.jdbc.dbtype.Oracle10GDatabaseType

All Implemented Interfaces:

DatabaseType, ReservedKeywordsAware

public class Oracle10GDatabaseType
extends AbstractDatabaseType

Field Summary

Fields inherited from class org.ofbiz.core.entity.jdbc.dbtype.AbstractDatabaseType

ALTER_TABLE_DROP_INDEX, CHANGE_COLUMN_TYPE_CLAUSE_STRUCTURE_STANDARD_ALTER_COLUMN, CHANGE_COLUMN_TYPE_CLAUSE_STRUCTURE_STANDARD_MODIFY, DROP_INDEX_SCHEMA_DOT_INDEX, DROP_INDEX_SCHEMA_DOT_TABLE_DOT_INDEX, STANDARD_SELECT_FOR_UPDATE_SYNTAX

Fields inherited from interface org.ofbiz.core.entity.jdbc.dbtype.DatabaseType

STANDARD_SELECT_SYNTAX

Fields inherited from interface org.ofbiz.core.entity.jdbc.sql.escape.ReservedKeywordsAware

END_ESCAPE_CHARACTER_SQUARE_BRACKET, ESCAPE_CHARACTER_BACK_TICK, ESCAPE_CHARACTER_DOUBLE_QUOTE, START_ESCAPE_CHARACTER_SQUARE_BRACKET

Constructor Summary

Constructors

Constructor and Description
Oracle10GDatabaseType()

Method Summary

Modifier and Type	Method and Description
static boolean	detectUnicodeExtension(DatabaseUtil.ColumnCheckInfo ccInfo) Unlike NVARCHAR2() the VARCHAR2(x CHAR) is Oracle specific and cannot be clearly seen through JDBC.
static boolean	detectUnicodeWidening(String typeName, DatabaseUtil.ColumnCheckInfo ccInfo, String oracleSpecificExtension) Warning: dirty hacks! Detects oracle specific type extension.
protected String	getChangeColumnTypeStructure()
String	getDropIndexStructure()
String	getSimpleSelectSqlSyntax(boolean clusterMode) Based on the cluster mode parameter, and the capabilities of the database, return the appropriate SELECT statement for usage.
boolean	matchesConnection(Connection con) Checks whether the connection object passed in matches the database type represented by this instance of the DatabaseType class.

Methods inherited from class org.ofbiz.core.entity.jdbc.dbtype.AbstractDatabaseType

equals, getChangeColumnTypeSQL, getConstraintNameClipLength, getDropIndexSQL, getFieldTypeName, getName, getReservedKeywords, getSchemaName, hashCode, initialize, isProductNameInPrefixList, productNameMatches, productNamesMatch, registerWithFactory, toString, versionGreaterThanOrEqual, versionGreaterThanOrEqual, versionLessThanOrEqual

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.ofbiz.core.entity.jdbc.sql.escape.ReservedKeywordsAware

enableEscaping, escapeColumnName, getEndEscapeCharacter, getStartEscapeCharacter

Constructor Detail

Oracle10GDatabaseType

public Oracle10GDatabaseType()

Method Detail

matchesConnection

public boolean matchesConnection(Connection con)
                          throws SQLException

Description copied from class: AbstractDatabaseType

Checks whether the connection object passed in matches the database type represented by this instance of the DatabaseType class.

Specified by:

matchesConnection in interface DatabaseType

Specified by:

matchesConnection in class AbstractDatabaseType

Returns:

true if the Connection matches this DatabaseType instance.

Throws:

SQLException

getChangeColumnTypeStructure

protected String getChangeColumnTypeStructure()

Overrides:

getChangeColumnTypeStructure in class AbstractDatabaseType

Returns:

a format string to compose an SQL query to change a column in DB.

detectUnicodeWidening

public static boolean detectUnicodeWidening(String typeName,
                                            DatabaseUtil.ColumnCheckInfo ccInfo,
                                            String oracleSpecificExtension)

Warning: dirty hacks! Detects oracle specific type extension. In oracle, VARCHAR2() type can be represented as:

VARCHAR2(x)

VARCHAR2(x BYTE)

Field with length in bytes, JDBC will attempt to put UTF-8 texts in there but lenght in characters cannot be guaranteed.

VARCHAR(x CHAR)

Field with length in characters, handling Unicode.

Parameters:

typeName - the configured field type (general, without field size).

ccInfo - the JDBC supplied information on the column.

oracleSpecificExtension - the declared mode of the VARCHAR2 extension, possible: "BYTE", "CHAR" or null.

Returns:

true, if the column is an Oracle VARCHAR2 type column without Unicode support and the definition requires it.

detectUnicodeExtension

public static boolean detectUnicodeExtension(DatabaseUtil.ColumnCheckInfo ccInfo)

Unlike NVARCHAR2() the VARCHAR2(x CHAR) is Oracle specific and cannot be clearly seen through JDBC. The only difference is in the declared CHAR_OCTET_LENGTH of the field, which is 4 times the declared field size. This is used to detect those field types here.

Parameters:

ccInfo - the JDBC supplied information on the column.

Returns:

true, if the column is an Oracle VARCHAR2 type column with Unicode support.

getDropIndexStructure

public String getDropIndexStructure()

Overrides:

getDropIndexStructure in class AbstractDatabaseType

Returns:

a format string to compose an SQL query to drop index in DB.

getSimpleSelectSqlSyntax

public String getSimpleSelectSqlSyntax(boolean clusterMode)

Description copied from interface: DatabaseType

Based on the cluster mode parameter, and the capabilities of the database, return the appropriate SELECT statement for usage.