org.apache.openjpa.jdbc.sql
Class EmpressDictionary

java.lang.Object
  org.apache.openjpa.jdbc.sql.DBDictionary
      org.apache.openjpa.jdbc.sql.EmpressDictionary

All Implemented Interfaces:

JoinSyntaxes, Configurable, ConnectionDecorator, LoggingConnectionDecorator.SQLWarningHandler

public class EmpressDictionary
extends DBDictionary

Dictionary for Empress using ODBC server combined with their type 2 driver. This dictionary may issues with other driver/topology configurations. Empress does not allow multiple connections to read rows read in a transaction, effectively forcing pessimistic transactions regardless of the Optimistic setting. To allow users to use optimistic transactions in a multi-connection evironment, you must set the AllowConcurrentRead setting to true in addition to standard options. Empress has the following additional limitations:

• Foreign keys are quite limited in Empress and it is recommended that these be created by hand.
• Batching can be unreliable. Using BatchLimit=0 is strongly recommended.
• Using AllowConcurrentRead should be accompanied by SimulateLocking=true
• Connections should be rolled back on return to ensure locks are released (see OpenJPA default DataSource documentation.
• Certain outer joins requiring parameters in a subselect is not supported by Empress and may under certain configurations cause size () calls on query results and LRS fields to throw an exception.
• Certain aggregate functions are not supported.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.openjpa.jdbc.sql.DBDictionary

DBDictionary.SerializedData

Field Summary

boolean

allowConcurrentRead This setting inserts "BYPASS" after every "SELECT".

Fields inherited from class org.apache.openjpa.jdbc.sql.DBDictionary

allowsAliasInBulkClause, arrayTypeName, autoAssignClause, autoAssignTypeName, bigintTypeName, binaryTypeName, bitLengthFunction, bitTypeName, blobTypeName, booleanTypeName, castFunction, catalogSeparator, CENTI, characterColumnSize, charTypeName, clobTypeName, closePoolSQL, concatenateDelimiter, concatenateFunction, conf, connected, CONS_NAME_AFTER, CONS_NAME_BEFORE, CONS_NAME_MID, constraintNameMode, createPrimaryKeys, crossJoinClause, currentDateFunction, currentTimeFunction, currentTimestampFunction, datePrecision, dateTypeName, DECI, decimalTypeName, distinctCountColumnSeparator, distinctTypeName, doubleTypeName, driverVendor, dropTableSQL, fixedSizeTypeNames, fixedSizeTypeNameSet, floatTypeName, forUpdateClause, getStringVal, inClauseLimit, initializationSQL, innerJoinClause, integerTypeName, javaObjectTypeName, joinSyntax, lastGeneratedKeyQuery, log, longVarbinaryTypeName, longVarcharTypeName, maxAutoAssignNameLength, maxColumnNameLength, maxConstraintNameLength, maxEmbeddedBlobSize, maxEmbeddedClobSize, maxIndexesPerTable, maxIndexNameLength, maxTableNameLength, MICRO, MILLI, NAME_ANY, NAME_SEQUENCE, NAME_TABLE, NANO, nextSequenceQuery, nullTypeName, numericTypeName, otherTypeName, outerJoinClause, platform, RANGE_POST_DISTINCT, RANGE_POST_LOCK, RANGE_POST_SELECT, RANGE_PRE_DISTINCT, rangePosition, realTypeName, refTypeName, requiresAliasForSubselect, requiresAutoCommitForMetaData, requiresCastForComparisons, requiresCastForMathFunctions, requiresConditionForCrossJoin, reservedWords, reservedWordSet, SCHEMA_CASE_LOWER, SCHEMA_CASE_PRESERVE, SCHEMA_CASE_UPPER, schemaCase, searchStringEscape, SEC, selectWords, selectWordSet, sequenceNameSQL, sequenceSchemaSQL, sequenceSQL, simulateLocking, smallintTypeName, storageLimitationsFatal, storeCharsAsNumbers, storeLargeNumbersAsStrings, stringLengthFunction, structTypeName, substringFunctionName, supportsAlterTableWithAddColumn, supportsAlterTableWithDropColumn, supportsAutoAssign, supportsCascadeDeleteAction, supportsCascadeUpdateAction, supportsCorrelatedSubselect, supportsDefaultDeleteAction, supportsDefaultUpdateAction, supportsDeferredConstraints, supportsForeignKeys, supportsHaving, supportsLockingWithDistinctClause, supportsLockingWithInnerJoin, supportsLockingWithMultipleTables, supportsLockingWithOrderClause, supportsLockingWithOuterJoin, supportsLockingWithSelectRange, supportsModOperator, supportsMultipleNontransactionalResultSets, supportsNullDeleteAction, supportsNullTableForGetColumns, supportsNullTableForGetImportedKeys, supportsNullTableForGetIndexInfo, supportsNullTableForGetPrimaryKeys, supportsNullUpdateAction, supportsQueryTimeout, supportsRestrictDeleteAction, supportsRestrictUpdateAction, supportsSchemaForGetColumns, supportsSchemaForGetTables, supportsSelectEndIndex, supportsSelectForUpdate, supportsSelectStartIndex, supportsSubselect, supportsTimestampNanos, supportsUniqueConstraints, supportsXMLColumn, systemSchemas, systemSchemaSet, systemTables, systemTableSet, tableForUpdateClause, tableTypes, timestampTypeName, timeTypeName, tinyintTypeName, toLowerCaseFunction, toUpperCaseFunction, trimBothFunction, trimLeadingFunction, trimTrailingFunction, useGetBestRowIdentifierForPrimaryKeys, useGetBytesForBlobs, useGetObjectForBlobs, useGetStringForClobs, useSchemaName, useSetBytesForBlobs, useSetStringForClobs, validationSQL, varbinaryTypeName, varcharTypeName, VENDOR_DATADIRECT, VENDOR_OTHER, xmlTypeName

Fields inherited from interface org.apache.openjpa.jdbc.sql.JoinSyntaxes

SYNTAX_DATABASE, SYNTAX_SQL92, SYNTAX_TRADITIONAL

Constructor Summary

EmpressDictionary()

Method Summary

String[]	getDropColumnSQL(Column column) Return a series of SQL statements to drop the given column from its table.
boolean	isSystemIndex(String name, Table table) This method is used to filter system indexes from database metadata.
void	setDouble(PreparedStatement stmnt, int idx, double val, Column col) Set the given value as a parameter to the statement.
void	setFloat(PreparedStatement stmnt, int idx, float val, Column col) Set the given value as a parameter to the statement.
SQLBuffer	toSelect(SQLBuffer selects, JDBCFetchConfiguration fetch, SQLBuffer from, SQLBuffer where, SQLBuffer group, SQLBuffer having, SQLBuffer order, boolean distinct, boolean forUpdate, long startIdx, long endIdx) Combine the given components into a SELECT statement.

Methods inherited from class org.apache.openjpa.jdbc.sql.DBDictionary

addCastAsType, appendCast, appendLength, appendNumericCast, appendSelectRange, appendSize, appendUpdates, appendXmlComparison, assertSupport, canOuterJoin, closeDataSource, comparison, connectedConfiguration, convertSchemaCase, createIndexIfNecessary, decorate, endConfiguration, getAddColumnSQL, getAddForeignKeySQL, getAddPrimaryKeySQL, getArray, getAsciiStream, getBigDecimal, getBigInteger, getBinaryStream, getBlob, getBlobObject, getBoolean, getByte, getBytes, getCalendar, getCastFunction, getCatalogNameForMetadata, getChar, getCharacterStream, getClob, getClobString, getColumnNameForMetadata, getColumns, getCreateIndexSQL, getCreateSequenceSQL, getCreateTableSQL, getDate, getDate, getDeclareColumnSQL, getDeleteTableContentsSQL, getDouble, getDropForeignKeySQL, getDropIndexSQL, getDropPrimaryKeySQL, getDropSequenceSQL, getDropTableSQL, getFloat, getForeignKeyConstraintSQL, getForUpdateClause, getFrom, getFromSelect, getFullName, getFullName, getFullName, getGeneratedKey, getGeneratedKeySequenceName, getImportedKeys, getIndexInfo, getInt, getJDBCType, getLocale, getLong, getNumber, getObject, getPlaceholderValueString, getPreferredType, getPrimaryKeyConstraintSQL, getPrimaryKeys, getPrimaryKeysFromBestRowIdentifier, getPrimaryKeysFromGetPrimaryKeys, getRef, getSchemaCase, getSchemaNameForMetadata, getSelectOperation, getSelects, getSequences, getSequencesSQL, getShort, getString, getTableNameForMetadata, getTables, getTime, getTimestamp, getTypeName, getTypeName, getUniqueConstraintSQL, getValidColumnName, getValidForeignKeyName, getValidIndexName, getValidPrimaryKeyName, getValidSequenceName, getValidTableName, getValidUniqueName, getVersionColumn, getWhere, handleWarning, indexOf, isSelect, isSystemSequence, isSystemTable, makeNameValid, mathFunction, newColumn, newForeignKey, newIndex, newPrimaryKey, newSequence, newStoreException, newTable, putBytes, putChars, putString, refSchemaComponents, serialize, setArray, setAsciiStream, setBigDecimal, setBigInteger, setBinaryStream, setBlob, setBlobObject, setBoolean, setByte, setBytes, setCalendar, setChar, setCharacterStream, setClob, setClobString, setConfiguration, setDate, setDate, setInt, setJoinSyntax, setLocale, setLong, setNull, setNumber, setObject, setRef, setShort, setString, setTime, setTimestamp, setTyped, setUnknown, shorten, startConfiguration, storageWarning, substring, supportsDeferredForeignKeyConstraints, supportsDeferredUniqueConstraints, supportsDeleteAction, supportsLocking, supportsRandomAccessResultSet, supportsUpdateAction, toBulkOperation, toDelete, toNativeJoin, toOperation, toOperation, toSelect, toSelect, toSelect, toSelect, toSelectCount, toSQL92Join, toTraditionalJoin, toUpdate

Methods inherited from class java.lang.Object

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

Field Detail

allowConcurrentRead

public boolean allowConcurrentRead

This setting inserts "BYPASS" after every "SELECT". This allows for multiple transactional reads of the same row from different connections at the expense of loss of pessimistic locking. Defaults to false.

Constructor Detail

EmpressDictionary

public EmpressDictionary()

Method Detail

isSystemIndex

public boolean isSystemIndex(String name,
                             Table table)

Description copied from class: DBDictionary

This method is used to filter system indexes from database metadata. Return true if the given index name represents a system index that should not appear in the schema definition. Returns false by default.

Overrides:

isSystemIndex in class DBDictionary

Parameters:

name - the index name

table - the index table

toSelect

public SQLBuffer toSelect(SQLBuffer selects,
                          JDBCFetchConfiguration fetch,
                          SQLBuffer from,
                          SQLBuffer where,
                          SQLBuffer group,
                          SQLBuffer having,
                          SQLBuffer order,
                          boolean distinct,
                          boolean forUpdate,
                          long startIdx,
                          long endIdx)

Description copied from class: DBDictionary

Combine the given components into a SELECT statement.

Overrides:

toSelect in class DBDictionary

getDropColumnSQL

public String[] getDropColumnSQL(Column column)

Description copied from class: DBDictionary

Return a series of SQL statements to drop the given column from its table. Return an empty array if operation not supported. Returns ALTER TABLE <table name> DROP COLUMN <col name> by default.

Overrides:

getDropColumnSQL in class DBDictionary

setFloat

public void setFloat(PreparedStatement stmnt,
                     int idx,
                     float val,
                     Column col)
              throws SQLException

Description copied from class: DBDictionary

Set the given value as a parameter to the statement.

Overrides:

setFloat in class DBDictionary

Throws:

SQLException

setDouble

public void setDouble(PreparedStatement stmnt,
                      int idx,
                      double val,
                      Column col)
               throws SQLException

Description copied from class: DBDictionary

Set the given value as a parameter to the statement.

Overrides:

setDouble in class DBDictionary

Throws:

SQLException