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java.lang.Object org.hibernate.dialect.Dialect org.hibernate.dialect.InformixDialect
public class InformixDialect
Informix dialect.
Seems to work with Informix Dynamic Server Version 7.31.UD3, Informix JDBC driver version 2.21JC3.
Field Summary |
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Fields inherited from class org.hibernate.dialect.Dialect |
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CLOSED_QUOTE, DEFAULT_BATCH_SIZE, NO_BATCH, QUOTE |
Constructor Summary | |
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InformixDialect()
Creates new InformixDialect instance. |
Method Summary | |
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String |
getAddColumnString()
The syntax used to add a column to a table (optional). |
String |
getAddForeignKeyConstraintString(String constraintName,
String[] foreignKey,
String referencedTable,
String[] primaryKey,
boolean referencesPrimaryKey)
The syntax used to add a foreign key constraint to a table. |
String |
getAddPrimaryKeyConstraintString(String constraintName)
The syntax used to add a primary key constraint to a table. |
String |
getCreateSequenceString(String sequenceName)
Typically dialects which support sequences can create a sequence with a single command. |
String |
getCurrentTimestampSelectString()
Retrieve the command used to retrieve the current timestamp from the database. |
String |
getDropSequenceString(String sequenceName)
Typically dialects which support sequences can drop a sequence with a single command. |
String |
getIdentityColumnString(int type)
The syntax used during DDL to define a column as being an IDENTITY of a particular type. |
String |
getIdentitySelectString(String table,
String column,
int type)
Get the select command to use to retrieve the last generated IDENTITY value for a particular table |
String |
getLimitString(String querySelect,
int offset,
int limit)
Given a limit and an offset, apply the limit clause to the query. |
String |
getQuerySequencesString()
Get the select command used retrieve the names of all sequences. |
String |
getSelectSequenceNextValString(String sequenceName)
Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement. |
String |
getSequenceNextValString(String sequenceName)
Generate the appropriate select statement to to retrieve the next value of a sequence. |
ViolatedConstraintNameExtracter |
getViolatedConstraintNameExtracter()
|
boolean |
hasDataTypeInIdentityColumn()
Whether this dialect have an Identity clause added to the data type or a completely separate identity data type |
boolean |
isCurrentTimestampSelectStringCallable()
Should the value returned by Dialect.getCurrentTimestampSelectString()
be treated as callable. |
boolean |
supportsCurrentTimestampSelection()
Does this dialect support a way to retrieve the database's current timestamp value? |
boolean |
supportsIdentityColumns()
Does this dialect support identity column key generation? |
boolean |
supportsLimit()
Does this dialect support some form of limiting query results via a SQL clause? |
boolean |
supportsLimitOffset()
Does this dialect's LIMIT support (if any) additionally support specifying an offset? |
boolean |
supportsPooledSequences()
Does this dialect support "pooled" sequences. |
boolean |
supportsSequences()
Does this dialect support sequences? |
boolean |
supportsVariableLimit()
Does this dialect support bind variables (i.e., prepared statement parameters) for its limit/offset? |
boolean |
useMaxForLimit()
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows? This is easiest understood via an example. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public InformixDialect()
InformixDialect
instance. Sets up the JDBC /
Informix type mappings.
Method Detail |
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public String getAddColumnString()
Dialect
getAddColumnString
in class Dialect
public boolean supportsIdentityColumns()
Dialect
supportsIdentityColumns
in class Dialect
public String getIdentitySelectString(String table, String column, int type) throws MappingException
Dialect
getIdentitySelectString
in class Dialect
table
- The table into which the insert was donecolumn
- The PK column.type
- The Types
type code.
MappingException
- If IDENTITY generation is not supported.public String getIdentityColumnString(int type) throws MappingException
Dialect
getIdentityColumnString
in class Dialect
type
- The Types
type code.
MappingException
- If IDENTITY generation is not supported.public boolean hasDataTypeInIdentityColumn()
Dialect
hasDataTypeInIdentityColumn
in class Dialect
public String getAddForeignKeyConstraintString(String constraintName, String[] foreignKey, String referencedTable, String[] primaryKey, boolean referencesPrimaryKey)
getAddForeignKeyConstraintString
in class Dialect
constraintName
- The FK constraint name.foreignKey
- The names of the columns comprising the FKreferencedTable
- The table referenced by the FKprimaryKey
- The explicit columns in the referencedTable referenced
by this FK.referencesPrimaryKey
- if false, constraint should be
explicit about which column names the constraint refers to
public String getAddPrimaryKeyConstraintString(String constraintName)
getAddPrimaryKeyConstraintString
in class Dialect
constraintName
- The name of the PK constraint.
public String getCreateSequenceString(String sequenceName)
Dialect
Dialect.getCreateSequenceStrings(java.lang.String)
to help facilitate that.
Dialects which support sequences and can create a sequence in a
single command need *only* override this method. Dialects
which support sequences but require multiple commands to create
a sequence should instead override Dialect.getCreateSequenceStrings(java.lang.String)
.
getCreateSequenceString
in class Dialect
sequenceName
- The name of the sequence
public String getDropSequenceString(String sequenceName)
Dialect
Dialect.getDropSequenceStrings(java.lang.String)
to help facilitate that.
Dialects which support sequences and can drop a sequence in a
single command need *only* override this method. Dialects
which support sequences but require multiple commands to drop
a sequence should instead override Dialect.getDropSequenceStrings(java.lang.String)
.
getDropSequenceString
in class Dialect
sequenceName
- The name of the sequence
public String getSequenceNextValString(String sequenceName)
Dialect
getSequenceNextValString
in class Dialect
sequenceName
- the name of the sequence
public String getSelectSequenceNextValString(String sequenceName)
Dialect
Dialect.getSequenceNextValString(String)
in that this
should return an expression usable within another statement.
getSelectSequenceNextValString
in class Dialect
sequenceName
- the name of the sequence
public boolean supportsSequences()
Dialect
supportsSequences
in class Dialect
public boolean supportsPooledSequences()
Dialect
supportsPooledSequences
in class Dialect
Dialect.getCreateSequenceStrings(String, int, int)
,
Dialect.getCreateSequenceString(String, int, int)
public String getQuerySequencesString()
Dialect
getQuerySequencesString
in class Dialect
SchemaUpdate
public boolean supportsLimit()
Dialect
supportsLimit
in class Dialect
public boolean useMaxForLimit()
Dialect
useMaxForLimit
in class Dialect
public boolean supportsLimitOffset()
Dialect
supportsLimitOffset
in class Dialect
public String getLimitString(String querySelect, int offset, int limit)
Dialect
getLimitString
in class Dialect
querySelect
- The query to which to apply the limit.offset
- The offset of the limitlimit
- The limit of the limit ;)
public boolean supportsVariableLimit()
Dialect
supportsVariableLimit
in class Dialect
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter()
getViolatedConstraintNameExtracter
in class Dialect
public boolean supportsCurrentTimestampSelection()
Dialect
supportsCurrentTimestampSelection
in class Dialect
public boolean isCurrentTimestampSelectStringCallable()
Dialect
Dialect.getCurrentTimestampSelectString()
be treated as callable. Typically this indicates that JDBC escape
syntax is being used...
isCurrentTimestampSelectStringCallable
in class Dialect
Dialect.getCurrentTimestampSelectString()
return
is callable; false otherwise.public String getCurrentTimestampSelectString()
Dialect
getCurrentTimestampSelectString
in class Dialect
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