org.dashbuilder.dataprovider.sql.dialect

Class SybaseASEDialect

java.lang.Object

org.dashbuilder.dataprovider.sql.dialect.DefaultDialect

org.dashbuilder.dataprovider.sql.dialect.SybaseASEDialect

All Implemented Interfaces:

Dialect

public class SybaseASEDialect
extends DefaultDialect

Constructor Summary

Constructors

Constructor and Description
SybaseASEDialect()

Method Summary

Modifier and Type	Method and Description
Date	convertToDate(Object value)
String	getColumnCastSQL(Column column)
String	getColumnTypeSQL(Column column)
String	getConcatFunctionSQL(Column[] columns, String begin, String end, String separator)
String	getDateParameterSQL(Date param)
String	getDatePartFunctionSQL(String part, Column column)
String	getOffsetLimitSQL(Select select)
String	getSelectStatement(Select select) Sybase ASE pagination queries are resolved as follows: 1. offset <= 0 limit > 0 SELECT TOP limit * FROM "EXPENSE_REPORTS" ORDER BY DEPARTMENT ASC 2. offset > 0 limit > 0 SELECT TOP limit+offset * FROM "EXPENSE_REPORTS" ORDER BY DEPARTMENT ASC 3. offset > 0 limit <= 0 SELECT * FROM "EXPENSE_REPORTS" ORDER BY DEPARTMENT ASC Case #2 and #3 requires a further post-prorcessing of the query results in order to apply offset.

Methods inherited from class org.dashbuilder.dataprovider.sql.dialect.DefaultDialect

_getLogicalExprConditionSQL, allowAliasInStatements, areEquals, convertToDouble, convertToString, getAliasForColumnSQL, getAliasForStatementSQL, getAliasStatement, getAndExprConditionSQL, getBetweenConditionSQL, getColumnFunctionSQL, getColumnNameQuotedSQL, getColumnNameSQL, getColumnSQL, getConcatFunctionSQL, getConditionSQL, getCoreConditionSQL, getCountQuerySQL, getDeleteStatement, getDynamicDateColumnSQL, getExcludedColumns, getFixedDateColumnSQL, getFromSQL, getFromStatement, getFunctionColumnSQL, getGreaterOrEqualsConditionSQL, getGreaterThanConditionSQL, getGroupBySQL, getGroupByStatement, getInConditionSQL, getInsertStatement, getIsEqualsToConditionSQL, getIsNullConditionSQL, getLikeToConditionSQL, getLogicalConditionSQL, getLowerFunctionSQL, getLowerOrEqualsConditionSQL, getLowerThanConditionSQL, getNotEqualsToConditionSQL, getNotExprConditionSQL, getNotInConditionSQL, getNotNullConditionSQL, getNumberParameterSQL, getOrderBySQL, getOrderByStatement, getOrExprConditionSQL, getParameterSQL, getSchemaNameSQL, getSelectSQL, getSimpleColumnSQL, getSortColumnSQL, getSortOrderSQL, getSQL, getSQL, getSQL, getSQL, getStringParameterSQL, getTableNameSQL, getTableSQL, getWhereSQL, getWhereSQL, getWhereStatement, getWhereStatement, invokeMethod, toChar

Methods inherited from class java.lang.Object

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

Constructor Detail

SybaseASEDialect

public SybaseASEDialect()

Method Detail

getColumnTypeSQL

public String getColumnTypeSQL(Column column)

Specified by:

getColumnTypeSQL in interface Dialect

Overrides:

getColumnTypeSQL in class DefaultDialect

convertToDate

public Date convertToDate(Object value)

Specified by:

convertToDate in interface Dialect

Overrides:

convertToDate in class DefaultDialect

getDateParameterSQL

public String getDateParameterSQL(Date param)

Specified by:

getDateParameterSQL in interface Dialect

Overrides:

getDateParameterSQL in class DefaultDialect

getColumnCastSQL

public String getColumnCastSQL(Column column)

Overrides:

getColumnCastSQL in class DefaultDialect

getDatePartFunctionSQL

public String getDatePartFunctionSQL(String part,
                                     Column column)

Specified by:

getDatePartFunctionSQL in interface Dialect

Overrides:

getDatePartFunctionSQL in class DefaultDialect

getConcatFunctionSQL

public String getConcatFunctionSQL(Column[] columns,
                                   String begin,
                                   String end,
                                   String separator)

Overrides:

getConcatFunctionSQL in class DefaultDialect

getSelectStatement

public String getSelectStatement(Select select)

Sybase ASE pagination queries are resolved as follows:

• 1. offset <= 0 limit > 0

SELECT TOP limit * FROM "EXPENSE_REPORTS" ORDER BY DEPARTMENT ASC

• 2. offset > 0 limit > 0

SELECT TOP limit+offset * FROM "EXPENSE_REPORTS" ORDER BY DEPARTMENT ASC

• 3. offset > 0 limit <= 0

SELECT * FROM "EXPENSE_REPORTS" ORDER BY DEPARTMENT ASC

Case #2 and #3 requires a further post-prorcessing of the query results in order to apply offset. Since Sybase ASE does not provide an easy way to implement a native offset mechanism the solution is to let dashbuilder to resolve it during the results post-processing stage.

Specified by:

getSelectStatement in interface Dialect

Overrides:

getSelectStatement in class DefaultDialect

getOffsetLimitSQL

public String getOffsetLimitSQL(Select select)

Specified by:

getOffsetLimitSQL in interface Dialect

Overrides:

getOffsetLimitSQL in class DefaultDialect