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version 1.1.2.4, 2001/12/09 02:57:09
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version 1.1.2.5, 2001/12/12 17:45:53
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| WHERE <where clause> | WHERE <where clause> |
| </pre> | </pre> |
| | |
| The properties are obtained with the getProperties() method. The class |
There are methods for obtaining the various elements of the select |
| name is obtained with getClassName(). The where clause is evaluated by |
statement. |
| calling evaluateWhereClause() with the appropriate arguments. If |
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| hasWhereClause() returns false, then there is no where clause. |
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| The components of the where clause are stored in two arrays: one for | The components of the where clause are stored in two arrays: one for |
| operands and one for operators (these are placed in proper order by the | operands and one for operators (these are placed in proper order by the |
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| /** Returns the number of property names which were indicated in the | /** Returns the number of property names which were indicated in the |
| selection list. | selection list. |
| */ | */ |
| Uint32 getPropertyNameCount() const |
Uint32 getSelectPropertyNameCount() const |
| { | { |
| return _propertyNames.size(); |
return _selectPropertyNames.size(); |
| } | } |
| | |
| /** Gets the i-th property name in the list. |
/** Gets the i-th selected property name in the list. |
| */ | */ |
| const String& getPropertyName(Uint32 i) |
const String& getSelectPropertyName(Uint32 i) |
| { | { |
| return _propertyNames[i]; |
return _selectPropertyNames[i]; |
| } | } |
| | |
| /** Appends a property name to the property name list. This user should | /** Appends a property name to the property name list. This user should |
| not call this method; it should only be called by the parser. | not call this method; it should only be called by the parser. |
| */ | */ |
| void appendPropertyName(const String& x) |
void appendSelectPropertyName(const String& x) |
| { | { |
| _propertyNames.append(x); |
_selectPropertyNames.append(x); |
| } | } |
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/** Returns the number of unique property names from the where clause. |
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*/ |
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Uint32 getWherePropertyNameCount() const |
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{ |
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return _wherePropertyNames.size(); |
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} |
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/** Gets the i-th unique property appearing in the where clause. |
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*/ |
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const String& getWherePropertyName(Uint32 i) |
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{ |
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return _wherePropertyNames[i]; |
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} |
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/** Appends a property name to the where property name list. This user |
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should not call this method; it should only be called by the parser. |
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@param x name of the property. |
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@return false if a property with that name already exists. |
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*/ |
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Boolean appendWherePropertyName(const String& x); |
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| /** Appends an operation to the operation array. This method should only | /** Appends an operation to the operation array. This method should only |
| be called by the parser itself. | be called by the parser itself. |
| */ | */ |
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| // WHERE ... | // WHERE ... |
| // | // |
| | |
| Array<String> _propertyNames; |
Array<String> _selectPropertyNames; |
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// |
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// The unique list of property names appearing in the WHERE clause. |
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// Although a property may occur many times in the WHERE clause, it will |
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// only appear once in this list. |
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// |
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Array<String> _wherePropertyNames; |
| | |
| // | // |
| // The list of operations encountered while parsing the WHERE clause. | // The list of operations encountered while parsing the WHERE clause. |
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| // | // |
| | |
| Array<WQLOperand> _operands; | Array<WQLOperand> _operands; |
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void f() const { } |
| }; | }; |
| | |
| PEGASUS_NAMESPACE_END | PEGASUS_NAMESPACE_END |
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WQLSelectStatement.h
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