org.tentackle.sql

Class AbstractSql92Backend

java.lang.Object

org.tentackle.sql.AbstractBackend

org.tentackle.sql.AbstractSql92Backend

All Implemented Interfaces:

Backend

Direct Known Subclasses:

AbstractSql2003Backend, Informix, MySql, Postgres

public abstract class AbstractSql92Backend
extends AbstractBackend

Common to all SQL92 backends.

Author:

harald

Field Summary

Fields

Modifier and Type	Field and Description
static String[]	RESERVED_WORDS_SQL92 array of reserved words.
static String	SQL_COALESCE COALESCE keyword.
static String	SQL_FOR_UPDATE FOR UPDATE string.

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
AbstractSql92Backend()

Method Summary

Modifier and Type	Method and Description
void	buildSelectSql(StringBuilder sqlBuilder, boolean writeLock, int limit, int offset) Creates a select statement string from an inner sql string.
String	getCoalesceKeyword() Gets the keyword for the COALESCE function.
Set<String>	getReservedWords() Gets the list of reserved words for this backend.
int	setLeadingSelectParameters(BackendPreparedStatement stmt, int limit, int offset) Sets optional parameters before applying the original parameters.
int	setTrailingSelectParameters(BackendPreparedStatement stmt, int index, int limit, int offset) Sets optional parameters after applying the original parameters.
String	sqlCreateForeignKey(String referencingTableName, String referencingColumnName, String referencedTableName, String referencedColumnName, String foreignKeyName, boolean composite) Generates the ALTER TABLE statement to add a foreign key constraint.
String	sqlDropForeignKey(String referencingTableName, String foreignKeyName) Generates the sql statement to drop a foreign key constraint.
String	sqlNextFromSequene(String name) Creates the SQL string to retrieve the next id from a sequence.
boolean	supportsSequences() True if backend provides transactionless sequences.

Methods inherited from class org.tentackle.sql.AbstractBackend

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.tentackle.sql.Backend

getBackendId, getDriverClassName, getName, isMatchingUrl

Field Detail

SQL_FOR_UPDATE

public static final String SQL_FOR_UPDATE

FOR UPDATE string.

See Also:

Constant Field Values

SQL_COALESCE

public static final String SQL_COALESCE

COALESCE keyword.

See Also:

Constant Field Values

RESERVED_WORDS_SQL92

public static final String[] RESERVED_WORDS_SQL92

array of reserved words.

Constructor Detail

AbstractSql92Backend

public AbstractSql92Backend()

Method Detail

getReservedWords

public Set<String> getReservedWords()

Description copied from interface: Backend

Gets the list of reserved words for this backend.

Returns:

the list of reserved words

buildSelectSql

public void buildSelectSql(StringBuilder sqlBuilder,
                           boolean writeLock,
                           int limit,
                           int offset)

Description copied from interface: Backend

Creates a select statement string from an inner sql string.

sqlBuilder is anything as FROM... WHERE... ORDER BY....
It is decorated with a leading SELECT plus optional clauses like for the given parameters.

Parameters:

sqlBuilder - the sql builder, initially containing the inner sql without leading SELECT.

writeLock - true select should write lock

limit - the limit value, ≤ 0 if no limit clause

offset - the offset value, ≤ 0 if no offset clause

setLeadingSelectParameters

public int setLeadingSelectParameters(BackendPreparedStatement stmt,
                                      int limit,
                                      int offset)

Description copied from interface: Backend

Sets optional parameters before applying the original parameters.

Parameters:

stmt - the prepared statement

limit - the limit value, ≤ 0 if no limit clause

offset - the offset value, ≤ 0 if no offset clause

Returns:

the next parameter index

setTrailingSelectParameters

public int setTrailingSelectParameters(BackendPreparedStatement stmt,
                                       int index,
                                       int limit,
                                       int offset)

Description copied from interface: Backend

Sets optional parameters after applying the original parameters.

Parameters:

stmt - the prepared statement

index - the first parameter index

limit - the limit value, ≤ 0 if no limit clause

offset - the offset value, ≤ 0 if no offset clause

Returns:

the next parameter index

getCoalesceKeyword

public String getCoalesceKeyword()

Description copied from interface: Backend

Gets the keyword for the COALESCE function.

Specified by:

getCoalesceKeyword in interface Backend

Overrides:

getCoalesceKeyword in class AbstractBackend

Returns:

the keyword

sqlCreateForeignKey

public String sqlCreateForeignKey(String referencingTableName,
                                  String referencingColumnName,
                                  String referencedTableName,
                                  String referencedColumnName,
                                  String foreignKeyName,
                                  boolean composite)

Description copied from interface: Backend

Generates the ALTER TABLE statement to add a foreign key constraint.

Parameters:

referencingTableName - the referencing foreign table name

referencingColumnName - the referencing foreign column name

referencedTableName - the referenced primary table name

referencedColumnName - the referenced primary column name

foreignKeyName - the name of the foreign key

composite - true if referencing table is a component of the referenced table

Returns:

the SQL code

sqlDropForeignKey

public String sqlDropForeignKey(String referencingTableName,
                                String foreignKeyName)

Description copied from interface: Backend

Generates the sql statement to drop a foreign key constraint.

Parameters:

referencingTableName - the referencing foreign table name

foreignKeyName - the name of the foreign key

Returns:

the SQL code

supportsSequences

public boolean supportsSequences()

Description copied from interface: Backend

True if backend provides transactionless sequences.

Returns:

true if database supports sequences

sqlNextFromSequene

public String sqlNextFromSequene(String name)

Description copied from interface: Backend

Creates the SQL string to retrieve the next id from a sequence.

Parameters:

name - the name of the sequence

Returns:

the SQL code