IDatabaseQuery Class
(CDP2SQL::IDatabaseQuery)Abstract interface base for queries. More...
| Header: | #include <IDatabaseQuery> |
Public Functions
| virtual | ~IDatabaseQuery() |
| virtual void | Close() = 0 |
| virtual void | ExecuteQuery(const std::string &sqlString) = 0 |
| virtual void | ExecuteQuery(IDatabaseStatement *st) = 0 |
| virtual std::string | FieldName(int field) const = 0 |
| virtual std::string | FieldType(int field) const = 0 |
| virtual const unsigned char * | FieldValueBlob(int field, int &len) const = 0 |
| virtual bool | FieldValueBool(int field) const = 0 |
| virtual double | FieldValueDouble(int field) const = 0 |
| virtual int64_t | FieldValueInt64(int field) const = 0 |
| virtual int | FieldValueInt(int field) const = 0 |
| virtual std::string | FieldValueStr(int field) const = 0 |
| virtual bool | IsEof() = 0 |
| virtual bool | IsFieldValueNull(int field) const = 0 |
| virtual bool | NextRow() = 0 |
| virtual unsigned int | NumFields() const = 0 |
Detailed Description
Abstract interface base for queries.
Concrete implementations are created (and destroyed) by IDatabaseConnection.
Member Function Documentation
[virtual] IDatabaseQuery::~IDatabaseQuery()
Should have virtual destructor for all abstract classes. Must close query if open.
[pure virtual] void IDatabaseQuery::Close()
Finalizes the query. Should do any major cleanup on the query.
[pure virtual] void IDatabaseQuery::ExecuteQuery(const std::string &sqlString)
Executes an SQL query string.
[pure virtual] void IDatabaseQuery::ExecuteQuery(IDatabaseStatement *st)
Executes an SQL query using the given IDatabaseStatement.
The IDatabaseStatement must be ready for use (unused or Reset, and any placeholder binded)
[pure virtual] std::string IDatabaseQuery::FieldName(int field) const
Name of field in column field.
[pure virtual] std::string IDatabaseQuery::FieldType(int field) const
Type of field in column field.
[pure virtual] const unsigned char *IDatabaseQuery::FieldValueBlob(int field, int &len) const
Gets blob value and length. Pointer is valid until calling NextRow(), Close() or ExecuteQuery().
[pure virtual] bool IDatabaseQuery::FieldValueBool(int field) const
Gets value in column field as boolean.
Returns false if field is NULL or 0. Otherwise true.
[pure virtual] double IDatabaseQuery::FieldValueDouble(int field) const
Gets value in column field as floating point.
[pure virtual] int64_t IDatabaseQuery::FieldValueInt64(int field) const
Gets value in column field as int64_t.
[pure virtual] int IDatabaseQuery::FieldValueInt(int field) const
Gets value in column field as integer.
[pure virtual] std::string IDatabaseQuery::FieldValueStr(int field) const
Gets value in column field as string.
[pure virtual] bool IDatabaseQuery::IsEof()
Returns true if we have reached the End-Of-File for the results.
[pure virtual] bool IDatabaseQuery::IsFieldValueNull(int field) const
Returns true if the field value is a SQL NULL.
[pure virtual] bool IDatabaseQuery::NextRow()
Goes to the next row. Returns false if there is no next row in the result.
[pure virtual] unsigned int IDatabaseQuery::NumFields() const
Returns how many fields (columns) does the result have.
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