org.tentackle.sql

Class Db2

java.lang.Object

org.tentackle.sql.AbstractBackend

org.tentackle.sql.AbstractSql92Backend

org.tentackle.sql.AbstractSql2003Backend

org.tentackle.sql.Db2

All Implemented Interfaces:

Backend

@Service(value=Backend.class)
public class Db2
extends AbstractSql2003Backend

Backend for DB2.

Author:

harald

Field Summary

Fields inherited from class org.tentackle.sql.AbstractSql2003Backend

RESERVED_WORDS_SQL2003, SQL_WINDOW_1, SQL_WINDOW_2, SQL_WINDOW_LIMIT, SQL_WINDOW_OFFSET

Fields inherited from class org.tentackle.sql.AbstractSql92Backend

RESERVED_WORDS_SQL92, SQL_COALESCE, SQL_FOR_UPDATE

Fields inherited from class org.tentackle.sql.AbstractBackend

EMPTY_STRING, TYPE_BIGINT, TYPE_BIT, TYPE_BLOB, TYPE_BOOL, TYPE_BOOLEAN, TYPE_BYTE, TYPE_BYTEA, TYPE_CHAR_1, TYPE_DATE, TYPE_DATETIME, TYPE_DATETIME_YEAR_TO_SECOND, TYPE_DECIMAL, TYPE_DECIMAL_19, TYPE_DOUBLE, TYPE_FLOAT, TYPE_FLOAT4, TYPE_FLOAT8, TYPE_INT, TYPE_INT2, TYPE_INT4, TYPE_INT8, TYPE_INTEGER, TYPE_NCHAR_1, TYPE_NUMBER, TYPE_NUMBER_1, TYPE_NUMBER_10, TYPE_NUMBER_19, TYPE_NUMBER_5, TYPE_NVARCHAR, TYPE_NVARCHAR_MAX, TYPE_REAL, TYPE_SMALLFLOAT, TYPE_SMALLINT, TYPE_TEXT, TYPE_TIME, TYPE_TIMESTAMP, TYPE_TINYINT, TYPE_VARBINARY_MAX, TYPE_VARCHAR

Fields inherited from interface org.tentackle.sql.Backend

SQL_ALLSTAR, SQL_AND, SQL_ANDNOT, SQL_COMMA, SQL_COMMA_PAR, SQL_DELETE, SQL_EQUAL, SQL_EQUAL_PAR, SQL_EQUAL_PAR_COMMA, SQL_EQUAL_ZERO, SQL_EXISTS, SQL_FROM, SQL_GREATER, SQL_GREATER_PAR, SQL_GREATEROREQUAL, SQL_GREATEROREQUAL_PAR, SQL_GROUPBY, SQL_INSERT_INTO, SQL_INSERT_VALUES, SQL_ISNOTNULL, SQL_ISNULL, SQL_LEFT_PARENTHESIS, SQL_LESS, SQL_LESS_PAR, SQL_LESSOREQUAL, SQL_LESSOREQUAL_PAR, SQL_LIKE, SQL_LIKE_PAR, SQL_MAX, SQL_MIN, SQL_NOT, SQL_NOTEQUAL, SQL_NOTEQUAL_PAR, SQL_NOTEQUAL_ZERO, SQL_NOTLIKE, SQL_NOTLIKE_PAR, SQL_OR, SQL_ORDERBY, SQL_ORNOT, SQL_PAR, SQL_PAR_COMMA, SQL_PLUS_ONE, SQL_RIGHT_PARENTHESIS, SQL_SELECT, SQL_SELECT_ALL_FROM, SQL_SET, SQL_SORTASC, SQL_SORTDESC, SQL_UPDATE, SQL_WHERE, SQL_WHEREALL, SQL_WHEREAND, SQL_WHERENOTHING, SQL_WHEREOR

Constructor Summary

Constructors

Constructor and Description
Db2()

Method Summary

Modifier and Type	Method and Description
String	getBackendId(Connection connection) Determines the unique id or name used by the backend for a given connection.
String	getDriverClassName() Gets the JDBC driver class name.
int	getMaxSize(SqlType sqlType) Returns the maximum size for a given SQL-type.
String	getName() Gets the name of the backend.
boolean	isMatchingUrl(String url) Checks whether the backend belongs to the given jdbc url.
SqlType[]	jdbcTypeToSqlType(int jdbcType, int size, int scale) Converts the JDBC data type integer to a tentackle backend SqlTypes.
String	sqlAddColumn(String tableName, String columnName, String comment, SqlType sqlType, int size, int scale, boolean nullable, Object defaultValue) Generates sql code to add a column.
String	sqlAlterColumnType(String tableName, String columnName, String comment, SqlType sqlType, int size, int scale, boolean nullable, Object defaultValue) Generates sql code to change the datatype of a column.
String	sqlCreateColumn(String columnName, String comment, SqlType sqlType, int size, int scale, boolean nullable, Object defaultValue, boolean primaryKey, boolean withTrailingComma) Generates the attribute definition of a CREATE TABLE statement.
String	sqlCreateColumnComment(String tableName, String columnName, String comment) Generates SQL code to create the comment for an attribute.
String	sqlCreateTableComment(String tableName, String comment) Generates SQL code to create the comment for a table.
String	sqlCreateTableIntro(String tableName, String comment) Generates the first line of a CREATE TABLE statement.
boolean	sqlResultSetIsClosedSupported() Determines whether the jdbc driver supports ResultSet.isClosed().
String	sqlTypeToString(SqlType sqlType, int size) Converts the java SQL-type to the database type name.

Methods inherited from class org.tentackle.sql.AbstractSql2003Backend

buildSelectSql, getReservedWords, setLeadingSelectParameters, setTrailingSelectParameters, sqlNextFromSequene, supportsSequences

Methods inherited from class org.tentackle.sql.AbstractSql92Backend

getCoalesceKeyword, sqlCreateForeignKey, sqlDropForeignKey

Methods inherited from class org.tentackle.sql.AbstractBackend

allowsExpressionsReferringToTablesBeingUpdated, assertValidName, buildSelectSql, columnTypeNullDefaultToString, columnTypeToString, createColumnMetaData, createConnection, createIndexColumnMetaData, createIndexMetaData, createTableMetaData, extractWhereClause, getDefaultSchema, getDefaultSize, getEmptyString, getMaxScale, getMetaData, getMigrationStrategy, getModelMetaData, getTableMetaData, isCommunicationLinkException, isConstraintException, isDefaultEqual, isMatchingName, isReleaseSavepointSupported, isTemporaryName, needAliasForSubselect, needSetLongWorkaround, needTxForFetchsize, normalizeDefault, optimizeSql, sqlAlterColumnComment, sqlAlterColumnDefault, sqlAlterColumnNullConstraint, sqlAlterTableComment, sqlAsBeforeTableAlias, sqlComment, sqlCreateIndex, sqlCreateTableAttributeWithoutComment, sqlCreateTableClosing, sqlCreateTableIntroWithoutComment, sqlDropColumn, sqlDropIndex, sqlFunction, sqlJoin, sqlJoinSelects, sqlJoinSelects, sqlRenameAndAlterColumnType, sqlRenameColumn, sqlRequiresExtraCommit, sqlUpdateToNotNull, toQuotedString, toString, valueToLiteral

Methods inherited from class java.lang.Object

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

Constructor Detail

Db2

public Db2()

Method Detail

isMatchingUrl

public boolean isMatchingUrl(String url)

Description copied from interface: Backend

Checks whether the backend belongs to the given jdbc url.

Parameters:

url - the jdbc url

Returns:

true if matches

getName

public String getName()

Description copied from interface: Backend

Gets the name of the backend.

Returns:

the name

getDriverClassName

public String getDriverClassName()

Description copied from interface: Backend

Gets the JDBC driver class name.

Returns:

the class name

sqlResultSetIsClosedSupported

public boolean sqlResultSetIsClosedSupported()

Description copied from interface: Backend

Determines whether the jdbc driver supports ResultSet.isClosed().

Specified by:

sqlResultSetIsClosedSupported in interface Backend

Overrides:

sqlResultSetIsClosedSupported in class AbstractBackend

Returns:

true if the driver supports it

getMaxSize

public int getMaxSize(SqlType sqlType)

Description copied from interface: Backend

Returns the maximum size for a given SQL-type.

Specified by:

getMaxSize in interface Backend

Overrides:

getMaxSize in class AbstractBackend

Parameters:

sqlType - the SQL-type

Returns:

the maximum size, 0 if unlimited, -1 if type without size

getBackendId

public String getBackendId(Connection connection)

Description copied from interface: Backend

Determines the unique id or name used by the backend for a given connection.

Useful to figure out the corresponding ManagedConnection from the backend's logfiles.

Parameters:

connection - the jdbc connection

Returns:

the backend id, null if none

sqlCreateTableIntro

public String sqlCreateTableIntro(String tableName,
                                  String comment)

Description copied from interface: Backend

Generates the first line of a CREATE TABLE statement.

Specified by:

sqlCreateTableIntro in interface Backend

Overrides:

sqlCreateTableIntro in class AbstractBackend

Parameters:

tableName - the tablename with optional schema separated by a dot

comment - optional comment, null if none

Returns:

the SQL code including the opening bracket

sqlTypeToString

public String sqlTypeToString(SqlType sqlType,
                              int size)

Description copied from interface: Backend

Converts the java SQL-type to the database type name.

Specified by:

sqlTypeToString in interface Backend

Overrides:

sqlTypeToString in class AbstractBackend

Parameters:

sqlType - the java sql type

size - the column's size

Returns:

the corresponding type string

jdbcTypeToSqlType

public SqlType[] jdbcTypeToSqlType(int jdbcType,
                                   int size,
                                   int scale)

Description copied from interface: Backend

Converts the JDBC data type integer to a tentackle backend SqlTypes.

There may be more than one sqltype returned!

Specified by:

jdbcTypeToSqlType in interface Backend

Overrides:

jdbcTypeToSqlType in class AbstractBackend

Parameters:

jdbcType - the jdbc data type

size - the column size

scale - the column's scale

Returns:

the SqlTypes, empty array if no mapping available or no exact match (not generated by TT)

See Also:

Types

sqlCreateColumn

public String sqlCreateColumn(String columnName,
                              String comment,
                              SqlType sqlType,
                              int size,
                              int scale,
                              boolean nullable,
                              Object defaultValue,
                              boolean primaryKey,
                              boolean withTrailingComma)

Description copied from interface: Backend

Generates the attribute definition of a CREATE TABLE statement.

Specified by:

sqlCreateColumn in interface Backend

Overrides:

sqlCreateColumn in class AbstractBackend

Parameters:

columnName - the database column name

comment - optional comment, null if none

sqlType - the JDBC sql type

size - the optional size

scale - the optional scale

nullable - true if NULL, else NOT NULL

defaultValue - the optional default value

primaryKey - true if this is a primary key

withTrailingComma - true if append a comma

Returns:

the SQL code

sqlCreateTableComment

public String sqlCreateTableComment(String tableName,
                                    String comment)

Description copied from interface: Backend

Generates SQL code to create the comment for a table.

Specified by:

sqlCreateTableComment in interface Backend

Overrides:

sqlCreateTableComment in class AbstractBackend

Parameters:

tableName - the table name

comment - optional comment, null if none

Returns:

the SQL code, empty string if comment is created via Backend.sqlCreateTableIntro(java.lang.String, java.lang.String) or Backend.sqlCreateTableClosing(java.lang.String, java.lang.String)

sqlCreateColumnComment

public String sqlCreateColumnComment(String tableName,
                                     String columnName,
                                     String comment)

Description copied from interface: Backend

Generates SQL code to create the comment for an attribute.

Specified by:

sqlCreateColumnComment in interface Backend

Overrides:

sqlCreateColumnComment in class AbstractBackend

Parameters:

tableName - the table name

columnName - the column name

comment - optional comment, null if none

Returns:

the SQL code, empty string if comment is created via Backend.sqlCreateColumn(java.lang.String, java.lang.String, org.tentackle.sql.SqlType, int, int, boolean, java.lang.Object, boolean, boolean)

sqlAddColumn

public String sqlAddColumn(String tableName,
                           String columnName,
                           String comment,
                           SqlType sqlType,
                           int size,
                           int scale,
                           boolean nullable,
                           Object defaultValue)

Description copied from interface: Backend

Generates sql code to add a column.

Specified by:

sqlAddColumn in interface Backend

Overrides:

sqlAddColumn in class AbstractBackend

Parameters:

tableName - the tablename

columnName - the new column name

comment - optional comment, null if none

sqlType - the JDBC sql type

size - the optional size

scale - the optional scale

nullable - true if NULL, else NOT NULL

defaultValue - the optional default value

Returns:

the SQL code

sqlAlterColumnType

public String sqlAlterColumnType(String tableName,
                                 String columnName,
                                 String comment,
                                 SqlType sqlType,
                                 int size,
                                 int scale,
                                 boolean nullable,
                                 Object defaultValue)

Description copied from interface: Backend

Generates sql code to change the datatype of a column.

Specified by:

sqlAlterColumnType in interface Backend

Overrides:

sqlAlterColumnType in class AbstractBackend

Parameters:

tableName - the tablename

columnName - the new column name

comment - optional comment, null if none

sqlType - the JDBC sql type

size - the optional size

scale - the optional scale

nullable - true if NULL, else NOT NULL

defaultValue - the optional default value

Returns:

the SQL code