KDbVariableExpressionData Class Reference

#include <KDbExpressionData.h>

Inheritance diagram for KDbVariableExpressionData:

Public Member Functions
	KDbVariableExpressionData (const QString &aName)
KDbVariableExpressionData *	clone () override
void	getQueryParameters (QList< KDbQuerySchemaParameter > *params) override
Public Member Functions inherited from KDbExpressionData
template<typename T >
T *	convert ()
template<typename T >
const T *	convertConst () const
QDebug	debug (QDebug dbg, KDb::ExpressionCallStack *callStack) const
bool	isDateTimeType () const
bool	isFPNumericType () const
bool	isIntegerType () const
bool	isNumericType () const
bool	isTextType () const
bool	isValid () const
KDbEscapedString	toString (const KDbDriver *driver, KDbQuerySchemaParameterValueListIterator *params=nullptr, KDb::ExpressionCallStack *callStack=nullptr) const
KDbField::Type	type () const
KDbField::Type	type (KDb::ExpressionCallStack *callStack) const
bool	validate (KDbParseInfo *parseInfo)
bool	validate (KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack)
Public Member Functions inherited from QSharedData
	QSharedData (const QSharedData &)

Public Attributes
KDbField *	field
QString	name
KDbTableSchema *	tableForQueryAsterisk
int	tablePositionForField
Public Attributes inherited from KDbExpressionData
QList< ExplicitlySharedExpressionDataPointer >	children
KDb::ExpressionClass	expressionClass
ExplicitlySharedExpressionDataPointer	parent
KDbToken	token

Protected Member Functions
void	debugInternal (QDebug dbg, KDb::ExpressionCallStack *callStack) const override
KDbEscapedString	toStringInternal (const KDbDriver *driver, KDbQuerySchemaParameterValueListIterator *params, KDb::ExpressionCallStack *callStack) const override
KDbField::Type	typeInternal (KDb::ExpressionCallStack *callStack) const override
bool	validateInternal (KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override
Protected Member Functions inherited from KDbExpressionData
bool	addToCallStack (QDebug *dbg, KDb::ExpressionCallStack *callStack) const

Detailed Description

Internal data class used to implement implicitly shared class KDbVariableExpression.

Provides thread-safe reference counting.

Definition at line 268 of file KDbExpressionData.h.

Member Function Documentation

debugInternal()

void KDbVariableExpressionData::debugInternal ( QDebug  dbg, KDb::ExpressionCallStack *  callStack  ) const

overrideprotectedvirtual

Sends information about this expression to debug output dbg (internal).

Reimplemented from KDbExpressionData.

Definition at line 60 of file KDbVariableExpression.cpp.

typeInternal()

KDbField::Type KDbVariableExpressionData::typeInternal ( KDb::ExpressionCallStack *  callStack ) const

overrideprotectedvirtual

We're assuming it's called after VariableExpr::validate()

Reimplemented from KDbExpressionData.

Definition at line 85 of file KDbVariableExpression.cpp.

validateInternal()

bool KDbVariableExpressionData::validateInternal ( KDbParseInfo *  parseInfo, KDb::ExpressionCallStack *  callStack  )

overrideprotectedvirtual

Validation. Sets field, tablePositionForField and tableForQueryAsterisk members. See addColumn() in parse.y to see how it's used on column adding.

Todo:

shall we also support db name?

Reimplemented from KDbExpressionData.

Definition at line 102 of file KDbVariableExpression.cpp.

Member Data Documentation

field

KDbField* KDbVariableExpressionData::field

0 by default. After successful validate() it will point to a field, if the variable is of a form "tablename.fieldname" or "fieldname", otherwise (eg. for asterisks) still 0. Only meaningful for column expressions within a query.

Definition at line 283 of file KDbExpressionData.h.

name

QString KDbVariableExpressionData::name

Verbatim name as returned by scanner.

Definition at line 277 of file KDbExpressionData.h.

tableForQueryAsterisk

KDbTableSchema* KDbVariableExpressionData::tableForQueryAsterisk

0 by default. After successful validate() it will point to a table that is referenced by asterisk, i.e. "*.tablename". This is set to nullptr if this variable is not an asterisk of that form.

Definition at line 296 of file KDbExpressionData.h.

tablePositionForField

int KDbVariableExpressionData::tablePositionForField

-1 by default. After successful validate() it will contain a position of a table within query that needs to be bound to the field. This value can be either be -1 if no binding is needed. This value is used in the Parser to call KDbQuerySchema::addField(KDbField* field, int bindToTable); Only meaningful for column expressions within a query.

Definition at line 291 of file KDbExpressionData.h.

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The documentation for this class was generated from the following files:

• KDbExpressionData.h
• KDbVariableExpression.cpp