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Wt
4.10.4
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Abstract base class for a prepared SQL statement. More...
#include <SqlStatement.h>
Public Member Functions | |
| virtual | ~SqlStatement () |
| Destructor. | |
| bool | use () |
| Uses the statement. | |
| void | done () |
| Finish statement use. | |
| virtual void | reset ()=0 |
| Resets the statement. | |
| virtual void | bind (int column, const std::string &value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, short value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, int value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, long long value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, float value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, double value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, const std::chrono::system_clock::time_point &value, SqlDateTimeType type)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, const std::chrono::duration< int, std::milli > &value)=0 |
| Binds a value to a column. | |
| virtual void | bind (int column, const std::vector< unsigned char > &value)=0 |
| Binds a value to a column. | |
| virtual void | bindNull (int column)=0 |
Binds null to a column. | |
| virtual void | execute ()=0 |
| Executes the statement. | |
| virtual long long | insertedId ()=0 |
Returns the id if the statement was an SQL insert. | |
| virtual int | affectedRowCount ()=0 |
| Returns the affected number of rows. | |
| virtual bool | nextRow ()=0 |
| Fetches the next result row. | |
| virtual int | columnCount () const =0 |
| Returns the number of columns in the result. | |
| virtual bool | getResult (int column, std::string *value, int size)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, short *value)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, int *value)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, long long *value)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, float *value)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, double *value)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, std::chrono::system_clock::time_point *value, SqlDateTimeType type)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, std::chrono::duration< int, std::milli > *value)=0 |
| Fetches a result value. | |
| virtual bool | getResult (int column, std::vector< unsigned char > *value, int size)=0 |
| Fetches a result value. | |
| virtual std::string | sql () const =0 |
| Returns the prepared SQL string. | |
Abstract base class for a prepared SQL statement.
The statement may be used multiple times, but cannot be used concurrently. It also cannot be copied.
This class is part of Wt::Dbo's backend API, and should not be used directly. Its interface must be reimplemented for each backend corresponding to a supported database.
Returns the affected number of rows.
This is only useful for an SQL update or delete statement.
Returns the number of columns in the result.
| void Wt::Dbo::SqlStatement::done | ( | ) |
Fetches a result value.
Returns true when the value was not null.
Fetches a result value.
Returns true when the value was not null.
Fetches a result value.
Returns true when the value was not null.
Fetches a result value.
Returns true when the value was not null.
Fetches a result value.
Returns true when the value was not null.
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pure virtual |
Fetches a result value.
Returns true when the value was not null.
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pure virtual |
Fetches a result value.
Returns true when the value was not null.
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pure virtual |
Fetches a result value.
Returns true when the value was not null. The size is the expected size of sql string type and can be used to dimension buffers but the return string may be bigger.
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pure virtual |
Fetches a result value.
Returns true when the value was not null.
Fetches the next result row.
Returns true if there was one more row to be fetched.
| bool Wt::Dbo::SqlStatement::use | ( | ) |
Uses the statement.
Marks the statement as in-use. If the statement is already in use, return false. In that case, we will later provision that a statement can be cloned and that a list of equivalent statement is kept in the statement cache of a connectin.