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java.lang.Object org.objectweb.cjdbc.common.sql.AbstractRequest org.objectweb.cjdbc.common.sql.AbstractWriteRequest org.objectweb.cjdbc.common.sql.DeleteRequest
An DeleteRequest
is an SQL request with the following syntax:
DELETE [table1] FROM table1,table2,table3,... WHERE search-condition or DELETE t WHERE search-conditionNote that DELETE from multiple tables are not supported but this is not part of the SQL standard.
Field Summary | |
private java.util.ArrayList |
from
ArrayList of String objects |
private boolean |
isUnique
true if this query only deletes a single row. |
private static long |
serialVersionUID
|
protected java.util.ArrayList |
whereValues
ArrayList of values String associated with
the unique columns involved in this delete query.
|
Fields inherited from class org.objectweb.cjdbc.common.sql.AbstractWriteRequest |
blocking, columns, pkValue, tableName |
Fields inherited from class org.objectweb.cjdbc.common.sql.AbstractRequest |
cacheable, cursorName, escapeProcessing, fetchSize, id, isAutoCommit, isParsed, isReadOnly, login, maxRows, requestType, sqlQuery, sqlSkeleton, timeoutInSeconds, transactionId, transactionIsolation |
Constructor Summary | |
DeleteRequest(CJDBCInputStream in)
|
|
DeleteRequest(java.lang.String sqlQuery,
boolean escapeProcessing,
int timeout,
java.lang.String lineSeparator)
Creates a new DeleteRequest instance. |
|
DeleteRequest(java.lang.String sqlQuery,
boolean escapeProcessing,
int timeout,
java.lang.String lineSeparator,
DatabaseSchema schema,
int granularity,
boolean isCaseSensitive)
Creates a new DeleteRequest instance. |
Method Summary | |
void |
cloneParsing(AbstractRequest request)
Clones the parsing of a request. |
void |
debug()
Displays some debugging information about this request. |
private java.util.ArrayList |
getFromTables(java.lang.String fromClause,
DatabaseSchema dbs)
Extracts the tables from the given FROM clause and retrieves
their alias if any. |
java.util.ArrayList |
getValues()
Returns an ArrayList of String objects
representing the values associated with the unique columns involved in this
request. |
private java.util.ArrayList |
getWhereColumns(java.lang.String whereClause,
java.util.ArrayList aliasedFrom)
Gets all the columns involved in the given WHERE clause.
|
boolean |
isUnique()
Returns true if this query only deletes a single row. |
boolean |
needsMacroProcessing()
Returns true if this request requires macro (RAND(), NOW(),
...) processing. |
void |
parse(DatabaseSchema schema,
int granularity,
boolean isCaseSensitive)
Parses the SQL request and extracts the selected columns and tables given the DatabaseSchema of the database targeted by this request.
|
boolean |
returnsResultSet()
Does this request returns a ResultSet? |
Methods inherited from class org.objectweb.cjdbc.common.sql.AbstractWriteRequest |
cloneTableNameAndColumns, getColumns, getPk, getTableName, mightBlock, setBlocking |
Methods inherited from class org.objectweb.cjdbc.common.sql.AbstractRequest |
equals, getCacheAbility, getCursorName, getEscapeProcessing, getFetchSize, getId, getLineSeparator, getLogin, getMaxRows, getSQL, getSQLShortForm, getSqlSkeleton, getTimeout, getTransactionId, getTransactionIsolation, isAlter, isAutoCommit, isCreate, isDDL, isDelete, isDML, isDriverProcessed, isDrop, isInsert, isParsed, isReadOnly, isSelect, isUpdate, receiveResultSetParams, sendResultSetParams, sendToStream, setCacheAbility, setCursorName, setDriverProcessed, setFetchSize, setId, setIsAutoCommit, setIsReadOnly, setLogin, setMaxRows, setSQL, setSqlSkeleton, setTimeout, setTransactionId, setTransactionIsolation, trimCarriageReturnAndTabs |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
private static final long serialVersionUID
private transient boolean isUnique
true
if this query only deletes a single row.
private transient java.util.ArrayList from
ArrayList
of String
objects
protected java.util.ArrayList whereValues
ArrayList
of values String
associated with
the unique columns involved in this delete query.
The values
instance variable is only used when a
COLUMN_UNIQUE_DELETE
granularity is applied. Here, the DELETE request is UNIQUE: all columns of
the WHERE clause are UNIQUE and used in the left part of an equality. When
such a granularity is used, the columns
instance variable
contains only UNIQUE columns.
CachingGranularities
Constructor Detail |
public DeleteRequest(java.lang.String sqlQuery, boolean escapeProcessing, int timeout, java.lang.String lineSeparator, DatabaseSchema schema, int granularity, boolean isCaseSensitive) throws java.sql.SQLException
DeleteRequest
instance. The caller must give
an SQL request, without any leading or trailing spaces and beginning with
'delete ' (it will not be checked).
If the syntax is incorrect an exception is thrown.
sqlQuery
- the SQL requestescapeProcessing
- should the driver to escape processing before
sending to the database ?timeout
- an int
valuelineSeparator
- the line separator used in the queryschema
- a DatabaseSchema
valuegranularity
- parsing granularity as defined in
ParsingGranularities
isCaseSensitive
- true if parsing is case sensitive
java.sql.SQLException
- if an error occurspublic DeleteRequest(java.lang.String sqlQuery, boolean escapeProcessing, int timeout, java.lang.String lineSeparator)
DeleteRequest
instance. The caller must give
an SQL request, without any leading or trailing spaces and beginning with
'delete ' (it will not be checked).
The request is not parsed but it can be done later by a call to
parse(DatabaseSchema, int, boolean)
.
sqlQuery
- the SQL requestescapeProcessing
- should the driver to escape processing before
sending to the database ?timeout
- an int
valuelineSeparator
- the line separator used in the queryparse(org.objectweb.cjdbc.common.sql.schema.DatabaseSchema, int, boolean)
public DeleteRequest(CJDBCInputStream in) throws java.io.IOException
AbstractWriteRequest
Method Detail |
public void parse(DatabaseSchema schema, int granularity, boolean isCaseSensitive) throws java.sql.SQLException
DatabaseSchema
of the database targeted by this request.
An exception is thrown when the parsing fails. Warning, this method does not check the validity of the request. In particular, invalid request could be parsed without throwing an exception. However, valid SQL request should never throw an exception.
parse
in class AbstractRequest
schema
- a DatabaseSchema
valuegranularity
- parsing granularity as defined in
ParsingGranularities
isCaseSensitive
- if parsing must be case sensitive
java.sql.SQLException
- if the parsing failspublic void cloneParsing(AbstractRequest request)
AbstractRequest
cloneParsing
in class AbstractRequest
request
- the parsed request to cloneAbstractRequest.cloneParsing(AbstractRequest)
private java.util.ArrayList getFromTables(java.lang.String fromClause, DatabaseSchema dbs) throws java.sql.SQLException
FROM
clause and retrieves
their alias if any.
fromClause
- the FROM
clause of the request (without
the FROM
keyword)dbs
- the DatabaseSchema
this request refers to
ArrayList
of AliasedDatabaseTable
objects
an
- SQLException
if an error occurs
java.sql.SQLException
private java.util.ArrayList getWhereColumns(java.lang.String whereClause, java.util.ArrayList aliasedFrom)
WHERE
clause.
The selected columns or tables must be found in the given
ArrayList
of AliasedDatabaseTable
representing the FROM
clause of the same request.
whereClause
- WHERE
clause of the request (without the
WHERE
keyword)aliasedFrom
- an ArrayList
of
AliasedDatabaseTable
ArrayList
of TableColumn
public java.util.ArrayList getValues()
ArrayList
of String
objects
representing the values associated with the unique columns involved in this
request.
ArrayList
valuepublic boolean isUnique()
true
if this query only deletes a single row.
boolean
valuepublic boolean needsMacroProcessing()
AbstractRequest
true
if this request requires macro (RAND(), NOW(),
...) processing.
needsMacroProcessing
in class AbstractRequest
true
if macro processing is requiredAbstractRequest.needsMacroProcessing()
public boolean returnsResultSet()
AbstractRequest
returnsResultSet
in class AbstractRequest
AbstractRequest.returnsResultSet()
public void debug()
debug
in class AbstractRequest
|
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