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	Description
`static java.lang.String[]`	`RESERVED_WORDS_SQL92`	array of reserved words.
`static java.lang.String`	`SQL_COALESCE`	COALESCE keyword.
`static java.lang.String`	`SQL_FOR_UPDATE`	FOR UPDATE string.

Fields inherited from class org.tentackle.sql.AbstractBackend
TYPE_BIGINT, TYPE_BIT, TYPE_BLOB, TYPE_BOOL, TYPE_BOOLEAN, TYPE_BYTE, TYPE_BYTEA, TYPE_CHAR_1, TYPE_CLOB, 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_ALTER_COLUMN, SQL_ALTER_INDEX, SQL_ALTER_TABLE, 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_IF_EXISTS, 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 Description

AbstractSql92Backend()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`buildSelectSql(java.lang.StringBuilder sqlBuilder, boolean writeLock, int limit, int offset)`	Creates a select statement string from an inner sql string.
`java.lang.String`	`getCoalesceKeyword()`	Gets the keyword for the COALESCE function.
`java.util.Set<java.lang.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.
`java.lang.String`	`sqlCreateForeignKey(java.lang.String referencingTableName, java.lang.String referencingColumnName, java.lang.String referencedTableName, java.lang.String referencedColumnName, java.lang.String foreignKeyName, boolean composite)`	Generates the ALTER TABLE statement to add a foreign key constraint.
`java.lang.String`	`sqlDropForeignKey(java.lang.String referencingTableName, java.lang.String foreignKeyName)`	Generates the sql statement to drop a foreign key constraint.
`java.lang.String`	`sqlNextFromSequene(java.lang.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, createPassword, createTableMetaData, extractWhereClause, getDefaultSchema, getDefaultSize, getEmptyString, getMaxScale, getMaxSize, getMetaData, getMigrationStrategy, getModelMetaData, getTableHeaders, getTableMetaData, isClobSupported, isCommunicationLinkException, isConstraintException, isDefaultEqual, isDropIfExistsEnabled, isDropIfExistsSupported, isFilteredIndexSupported, isFunctionBasedIndexSupported, isMatchingName, isReleaseSavepointSupported, isReservedSchemaName, isReservedTableName, isTemporaryName, jdbcTypeToSqlType, needAliasForSubselect, needSetLongWorkaround, needTxForFetchsize, normalizeDefault, optimizeSql, setDropIfExistsEnabled, sqlAddColumn, sqlAlterColumnComment, sqlAlterColumnDefault, sqlAlterColumnNullConstraint, sqlAlterColumnType, sqlAlterTableComment, sqlAsBeforeTableAlias, sqlComment, sqlCreateColumn, sqlCreateColumnComment, sqlCreateIndex, sqlCreateTableAttributeWithoutComment, sqlCreateTableClosing, sqlCreateTableComment, sqlCreateTableIntro, sqlCreateTableIntroWithoutComment, sqlDropColumn, sqlDropIndex, sqlDropTable, sqlFunction, sqlJoin, sqlJoinSelects, sqlJoinSelects, sqlRenameAndAlterColumnType, sqlRenameColumn, sqlRenameIndex, sqlRenameTable, 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 java.lang.String SQL_FOR_UPDATE
```
    FOR UPDATE string.
    
    See Also:
    
    Constant Field Values
  - SQL_COALESCE
```
public static final java.lang.String SQL_COALESCE
```
    COALESCE keyword.
    
    See Also:
    
    Constant Field Values
  - RESERVED_WORDS_SQL92
```
public static final java.lang.String[] RESERVED_WORDS_SQL92
```
    array of reserved words.
- Constructor Detail
  - AbstractSql92Backend
```
public AbstractSql92Backend()
```
- Method Detail
  - getReservedWords
```
public java.util.Set<java.lang.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(java.lang.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 java.lang.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 java.lang.String sqlCreateForeignKey(java.lang.String referencingTableName,
                                            java.lang.String referencingColumnName,
                                            java.lang.String referencedTableName,
                                            java.lang.String referencedColumnName,
                                            java.lang.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 java.lang.String sqlDropForeignKey(java.lang.String referencingTableName,
                                          java.lang.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 java.lang.String sqlNextFromSequene(java.lang.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

Class AbstractSql92Backend

Field Summary

Fields inherited from class org.tentackle.sql.AbstractBackend

Fields inherited from interface org.tentackle.sql.Backend

Constructor Summary

Method Summary

Methods inherited from class org.tentackle.sql.AbstractBackend

Methods inherited from class java.lang.Object

Methods inherited from interface org.tentackle.sql.Backend

Field Detail

SQL_FOR_UPDATE

SQL_COALESCE

RESERVED_WORDS_SQL92

Constructor Detail

AbstractSql92Backend

Method Detail

getReservedWords

buildSelectSql

setLeadingSelectParameters

setTrailingSelectParameters

getCoalesceKeyword

sqlCreateForeignKey

sqlDropForeignKey

supportsSequences

sqlNextFromSequene