com.sun.jdo.spi.persistence.support.sqlstore.sql.generator

Class SelectStatement

java.lang.Object

com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.Statement

com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.SelectStatement

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

SelectOneStatement

public class SelectStatement
extends Statement

This class generates select statements.

Field Summary

Fields inherited from class com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.Statement

columns, inputDesc, messages, OP_BINOP_MASK, OP_FUNC_MASK, OP_INFIX_MASK, OP_IRREGULAR_MASK, OP_ORDERBY_MASK, OP_OTHER_MASK, OP_PARAM_MASK, OP_PAREN_MASK, OP_PCOUNT_MASK, OP_POSTFIX_MASK, OP_PREFIX_MASK, OP_WHERE_MASK, secondaryTableStatements, statementText, tableList, vendorType

Constructor Summary

Constructors

Constructor and Description
SelectStatement(DBVendorType vendorType, SelectQueryPlan plan)

Method Summary

Modifier and Type	Method and Description
ColumnRef	addColumn(org.netbeans.modules.dbschema.ColumnElement columnElement, QueryTable queryTable)
void	appendTableText(StringBuffer text, QueryTable table)
void	bindInputValues(DBStatement s, ValueFetcher parameters) Binds input valus corrsponding to this Statement object to database statement s.
void	copyColumns(SelectStatement sourceStatement)
protected StringBuffer	generateColumnText()
protected void	generateStatementText() Generates the SQL text for the query described by this object.
String	getFormattedSQLText(ValueFetcher parameters) Gets formatted sql text corrsponding to this statement object.
protected String	getJoinOperator(int operation) Returns join operator for specified operation.
QueryPlan	getQueryPlan() Get QueryPlan for this statement
boolean	isColumnTypeDefinitionNeeded() Determines if Column Type definition is needed for this statement.
boolean	isJoined()
protected boolean	isUpdateLockRequired(QueryTable table)
void	markJoined()
protected void	processIrregularOperation(ConstraintOperation opNode, int opCode, List stack, StringBuffer result)
protected void	processRootConstraint(ConstraintOperation opNode, List stack, StringBuffer whereText) Processes Order By constraints and calls the super class method for all other constrains.

Methods inherited from class com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.Statement

addColumnRef, addConstraint, addQueryTable, addSecondaryTableStatement, appendQuotedText, bindInputValues, clone, findQueryTable, formatSqlText, generateColumnText, generateInputValueForConstraintValueNode, getAction, getColumnRef, getColumnRefs, getFormattedSQLText, getOriginalPlan, getQueryTables, getSecondaryTableStatements, getText, getVendorType, getWhereText, infixOperator, operationFormat, postfixOperator, prefixOperator, processConstraintParamIndex, processConstraints, processConstraintValue, setAction

Methods inherited from class java.lang.Object

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

Constructor Detail

SelectStatement

public SelectStatement(DBVendorType vendorType,
                       SelectQueryPlan plan)

Method Detail

isJoined

public boolean isJoined()

markJoined

public void markJoined()

addColumn

public ColumnRef addColumn(org.netbeans.modules.dbschema.ColumnElement columnElement,
                           QueryTable queryTable)

copyColumns

public void copyColumns(SelectStatement sourceStatement)

isUpdateLockRequired

protected boolean isUpdateLockRequired(QueryTable table)

appendTableText

public void appendTableText(StringBuffer text,
                            QueryTable table)

Overrides:

appendTableText in class Statement

isColumnTypeDefinitionNeeded

public boolean isColumnTypeDefinitionNeeded()

Determines if Column Type definition is needed for this statement. Column Type definition is a performance optimization that allows defining Column Type for the resultset. If the query to be executed is counting pc instances, the column used inside COUNT() is one of the pk columns. If the pk column happens to be not convertable to an int (for example timestamp), database will throw an exception. To prevent this situation, column type definition should not be performed on such queries.

Returns:

true if column type definition is needed, false otherwise.

getQueryPlan

public QueryPlan getQueryPlan()

Description copied from class: Statement

Get QueryPlan for this statement

Specified by:

getQueryPlan in class Statement

Returns:

QueryPlan for this statement

generateStatementText

protected void generateStatementText()

Description copied from class: Statement

Generates the SQL text for the query described by this object.

Specified by:

generateStatementText in class Statement

generateColumnText

protected StringBuffer generateColumnText()

processRootConstraint

protected void processRootConstraint(ConstraintOperation opNode,
                                     List stack,
                                     StringBuffer whereText)

Processes Order By constraints and calls the super class method for all other constrains.

Overrides:

processRootConstraint in class Statement

processIrregularOperation

protected void processIrregularOperation(ConstraintOperation opNode,
                                         int opCode,
                                         List stack,
                                         StringBuffer result)

Overrides:

processIrregularOperation in class Statement

getJoinOperator

protected String getJoinOperator(int operation)

Returns join operator for specified operation.

Parameters:

operation - The join operation. Should be one of ActionDesc.OP_EQUIJOIN, ActionDesc.OP_LEFTJOIN or ActionDesc.OP_RIGHTJOIN.

Returns:

join operator for specified operation.

bindInputValues

public void bindInputValues(DBStatement s,
                            ValueFetcher parameters)
                     throws SQLException

Binds input valus corrsponding to this Statement object to database statement s.

Parameters:

s - The database statement.

parameters - If an InputValue to be bound is a parameter, the actual value is contained in this.

Throws:

SQLException

getFormattedSQLText

public String getFormattedSQLText(ValueFetcher parameters)

Gets formatted sql text corrsponding to this statement object. The text also contains values for input to the statement.

Parameters:

parameters - The input paramters to this statement.

Returns:

formatted sql text corrsponding to this statement object.