mirror of
https://github.com/VCMP-SqMod/SqMod.git
synced 2024-11-08 16:57:16 +01:00
7dc20fcc0c
Implement field wrappers and field retrieval by name. Various other fixes and adjustments.
426 lines
12 KiB
C++
426 lines
12 KiB
C++
// ------------------------------------------------------------------------------------------------
|
|
#include "Handle/ResultSet.hpp"
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
#include <cstdio>
|
|
#include <cstring>
|
|
#include <cstdlib>
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
namespace SqMod {
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ResBind::SetOutput(const FieldType & field, BindType * bind)
|
|
{
|
|
// Associate the library bind point with our bind wrapper
|
|
mBind = bind;
|
|
// Assign the 64 bit unsigned integer as the default buffer
|
|
mBind->buffer = &mUint64;
|
|
// Match the bind point type to the one from the field
|
|
mBind->buffer_type = field.type;
|
|
// Default to n empty buffer until type identification
|
|
mBind->buffer_length = 0;
|
|
// Allow the library to specify whether the value is null
|
|
mBind->is_null = &mIsNull;
|
|
// Allow the library to specify if errors occurred
|
|
mBind->error = &mError;
|
|
// Tell the library where to read the buffer size
|
|
mBind->length = &(mBind->buffer_length);
|
|
// Identify and configure the field type
|
|
switch (field.type)
|
|
{
|
|
case MYSQL_TYPE_NULL:
|
|
case MYSQL_TYPE_TINY:
|
|
case MYSQL_TYPE_BIT:
|
|
{
|
|
mBind->buffer_length = 1;
|
|
} break;
|
|
case MYSQL_TYPE_YEAR:
|
|
case MYSQL_TYPE_SHORT:
|
|
{
|
|
mBind->buffer_length = sizeof(Int16);
|
|
} break;
|
|
case MYSQL_TYPE_INT24:
|
|
case MYSQL_TYPE_LONG:
|
|
{
|
|
mBind->buffer_length = sizeof(Int32);
|
|
} break;
|
|
case MYSQL_TYPE_LONGLONG:
|
|
{
|
|
mBind->buffer_length = sizeof(Int64);
|
|
} break;
|
|
case MYSQL_TYPE_FLOAT:
|
|
{
|
|
mBind->buffer_length = sizeof(Float32);
|
|
} break;
|
|
case MYSQL_TYPE_DOUBLE:
|
|
{
|
|
mBind->buffer_length = sizeof(Float64);
|
|
} break;
|
|
case MYSQL_TYPE_NEWDATE:
|
|
case MYSQL_TYPE_DATE:
|
|
case MYSQL_TYPE_TIME:
|
|
case MYSQL_TYPE_DATETIME:
|
|
case MYSQL_TYPE_TIMESTAMP:
|
|
{
|
|
mBind->buffer = &mTime;
|
|
} break;
|
|
case MYSQL_TYPE_DECIMAL:
|
|
case MYSQL_TYPE_NEWDECIMAL:
|
|
case MYSQL_TYPE_TINY_BLOB:
|
|
case MYSQL_TYPE_MEDIUM_BLOB:
|
|
case MYSQL_TYPE_LONG_BLOB:
|
|
case MYSQL_TYPE_BLOB:
|
|
case MYSQL_TYPE_ENUM:
|
|
case MYSQL_TYPE_SET:
|
|
case MYSQL_TYPE_VARCHAR:
|
|
case MYSQL_TYPE_VAR_STRING:
|
|
case MYSQL_TYPE_STRING:
|
|
{
|
|
// Allocate a buffer to match the field size
|
|
mData.Adjust(field.max_length);
|
|
// Assign the buffer as the new bind point buffer
|
|
mBind->buffer = mData.Data();
|
|
// Assign the buffer size as the new bind point size
|
|
mBind->buffer_length = mData.Capacity();
|
|
} break;
|
|
default: STHROWF("Unknown MySQL field type");
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
ResHnd::ResHnd()
|
|
: mPtr(nullptr)
|
|
, mFieldCount(0)
|
|
, mLengths(nullptr)
|
|
, mFields(nullptr)
|
|
, mBinds(nullptr)
|
|
, mMyBinds(nullptr)
|
|
, mRow(nullptr)
|
|
, mConnection()
|
|
, mStatement()
|
|
, mIndexes()
|
|
{
|
|
/* ... */
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
ResHnd::~ResHnd()
|
|
{
|
|
// Is there a result-set that we should free?
|
|
if (mPtr)
|
|
{
|
|
mysql_free_result(mPtr);
|
|
}
|
|
// Are there any bind points that we should free?
|
|
if (mMyBinds)
|
|
{
|
|
delete [] (mMyBinds);
|
|
}
|
|
// Was this result-set from a statement?
|
|
if (mStatement)
|
|
{
|
|
// Are there any rows pointers we should free?
|
|
if (mRow)
|
|
{
|
|
delete [] (mRow);
|
|
}
|
|
// Free the result-set in the statement
|
|
mysql_stmt_free_result(mStatement->mPtr);
|
|
}
|
|
// Are there any bind wrappers that we should free?
|
|
if (mBinds)
|
|
{
|
|
delete [] (mBinds);
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ResHnd::GrabCurrent()
|
|
{
|
|
if (mConnection)
|
|
{
|
|
mConnection->GrabCurrent();
|
|
}
|
|
else if (mStatement)
|
|
{
|
|
mStatement->GrabCurrent();
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
|
|
void ResHnd::ThrowCurrent(CCStr act, CCStr file, Int32 line)
|
|
{
|
|
GrabCurrent();
|
|
// Throw the exception with the resulted message
|
|
if (mConnection)
|
|
{
|
|
mConnection->ThrowCurrent(act, file, line);
|
|
}
|
|
else if (mStatement)
|
|
{
|
|
mStatement->ThrowCurrent(act, file, line);
|
|
}
|
|
}
|
|
#else
|
|
void ResHnd::ThrowCurrent(CCStr act)
|
|
{
|
|
GrabCurrent();
|
|
// Throw the exception with the resulted message
|
|
if (mConnection)
|
|
{
|
|
mConnection->ThrowCurrent(act);
|
|
}
|
|
else if (mStatement)
|
|
{
|
|
mStatement->ThrowCurrent(act);
|
|
}
|
|
}
|
|
#endif // _DEBUG
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
|
|
void ResHnd::ValidateField(Uint32 idx, CCStr file, Int32 line) const
|
|
{
|
|
// Is the handle valid?
|
|
if (mPtr == nullptr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set =>[%s:%d]", file, line);
|
|
}
|
|
else if (idx >= mFieldCount)
|
|
{
|
|
STHROWF("Field index is out of range: %u >= %lu =>[%s:%d]", idx, mFieldCount, file, line);
|
|
}
|
|
}
|
|
#else
|
|
void ResHnd::ValidateField(Uint32 idx) const
|
|
{
|
|
// Is the handle valid?
|
|
if (mPtr == nullptr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set");
|
|
}
|
|
else if (idx >= mFieldCount)
|
|
{
|
|
STHROWF("Field index is out of range: %u >= %lu", idx, mFieldCount);
|
|
}
|
|
}
|
|
#endif // _DEBUG
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
Uint32 ResHnd::GetFieldIndex(CSStr name)
|
|
{
|
|
// Validate the handle
|
|
if (!mPtr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set");
|
|
}
|
|
// Attempt to find the specified field
|
|
const IndexMap::iterator itr = mIndexes.find(name);
|
|
// Was there a field with the specified name?
|
|
if (itr != mIndexes.end())
|
|
{
|
|
return itr->second;
|
|
}
|
|
// No such field exists (expecting the invoker to validate the result)
|
|
return std::numeric_limits< Uint32 >::max();
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ResHnd::Create(const ConnRef & conn)
|
|
{
|
|
// Is this result-set already created?
|
|
if (mPtr != nullptr)
|
|
{
|
|
STHROWF("MySQL result-set was already created");
|
|
}
|
|
// Validate the specified connection handle
|
|
else if (!conn)
|
|
{
|
|
STHROWF("Invalid MySQL connection reference");
|
|
}
|
|
else if (conn->mPtr == nullptr)
|
|
{
|
|
STHROWF("Invalid MySQL connection");
|
|
}
|
|
// Store the connection handle
|
|
mConnection = conn;
|
|
// Retrieve the complete result-set to the client, if any
|
|
mPtr = mysql_store_result(mConnection->mPtr);
|
|
// Did this query return any results?
|
|
if (!mPtr)
|
|
{
|
|
return; // We're done here!
|
|
}
|
|
// Obtain the number of fields in the result-set
|
|
mFieldCount = mysql_num_fields(mPtr);
|
|
// Obtain an array representing the fields in the result-set
|
|
mFields = mysql_fetch_fields(mPtr);
|
|
// Associate the field names with their index
|
|
for (Uint32 i = 0; i < mFieldCount; ++i)
|
|
{
|
|
mIndexes[mFields[i].name] = i;
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ResHnd::Create(const StmtRef & stmt)
|
|
{
|
|
// Is this result-set already created?
|
|
if (mPtr != nullptr)
|
|
{
|
|
STHROWF("MySQL result-set was already created");
|
|
}
|
|
// Validate the given statement handle
|
|
else if (!stmt)
|
|
{
|
|
STHROWF("Invalid MySQL statement reference");
|
|
}
|
|
else if (stmt->mPtr == nullptr)
|
|
{
|
|
STHROWF("Invalid MySQL statement");
|
|
}
|
|
// Store the statement handle
|
|
mStatement = stmt;
|
|
// Set the parameter value for the next operation
|
|
int max_length = 1;
|
|
// Force mysql_stmt_store_result() to update the meta-data MYSQL_FIELD->max_length value
|
|
if (mysql_stmt_attr_set(mStatement->mPtr, STMT_ATTR_UPDATE_MAX_LENGTH, &max_length) != 0)
|
|
{
|
|
SQMOD_THROW_CURRENT(*mStatement, "Cannot apply MySQL statement attribute");
|
|
}
|
|
// Attempt to buffer the complete result-set on the client
|
|
if (mysql_stmt_store_result(mStatement->mPtr))
|
|
{
|
|
SQMOD_THROW_CURRENT(*mStatement, "Cannot buffer MySQL result-set");
|
|
}
|
|
// Obtain the number of fields in the result-set
|
|
mFieldCount = mysql_stmt_field_count(mStatement->mPtr);
|
|
// Obtain the result-set meta-data
|
|
mPtr = mysql_stmt_result_metadata(mStatement->mPtr);
|
|
// Obtain an array representing the fields in the result-set
|
|
mFields = mysql_fetch_fields(mPtr);
|
|
// Are there any fields to allocate
|
|
if (mFieldCount > 0)
|
|
{
|
|
// Allocate the bind wrappers
|
|
mBinds = new ResBind[mFieldCount];
|
|
// Validate the allocated structures
|
|
if (!mBinds)
|
|
{
|
|
STHROWF("Unable to allocate MySQL bind point wrappers");
|
|
}
|
|
// Allocate the bind points
|
|
mMyBinds = new BindType[mFieldCount];
|
|
// Validate the allocated structures
|
|
if (!mMyBinds)
|
|
{
|
|
STHROWF("Unable to allocate MySQL bind point structures");
|
|
}
|
|
// Allocate the row pointers
|
|
mRow = new CStr[mFieldCount];
|
|
// Validate the allocated structures
|
|
if (!mRow)
|
|
{
|
|
STHROWF("Unable to allocate MySQL row pointers");
|
|
}
|
|
// Initialize the bind points to null
|
|
std::memset(mMyBinds, 0, sizeof(BindType) * mFieldCount);
|
|
}
|
|
// Configure bind points and make associations
|
|
for (Uint32 i = 0; i < mFieldCount; ++i)
|
|
{
|
|
// Associate the current field name with the current index
|
|
mIndexes[mFields[i].name] = i;
|
|
// Configure the current bind point according to the associated field
|
|
mBinds[i].SetOutput(mFields[i], &mMyBinds[i]);
|
|
// Store the bind point buffer into the associated row
|
|
mRow[i] = mBinds[i].GetBuffer();
|
|
}
|
|
// Associate our bind points with the statement for result storage
|
|
if (mFieldCount > 0 && mysql_stmt_bind_result(mStatement->mPtr, mMyBinds) != 0)
|
|
{
|
|
SQMOD_THROW_CURRENT(*mStatement, "Cannot bind MySQL variables to statement");
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
Uint64 ResHnd::RowIndex() const
|
|
{
|
|
// Is this result-set even valid?
|
|
if (!mPtr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set");
|
|
}
|
|
// Did we come from a statement?
|
|
else if (mStatement)
|
|
{
|
|
return (Uint64)mysql_stmt_row_tell(mStatement->mPtr);
|
|
}
|
|
// Just retrieve it from the result set
|
|
return (Uint64)mysql_row_tell(mPtr);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
Uint64 ResHnd::RowCount() const
|
|
{
|
|
// Is this result-set even valid?
|
|
if (!mPtr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set");
|
|
}
|
|
// Did we come from a statement?
|
|
else if (mStatement)
|
|
{
|
|
return mysql_stmt_num_rows(mStatement->mPtr);
|
|
}
|
|
// Just retrieve it from the result set
|
|
return mysql_num_rows(mPtr);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
bool ResHnd::Next()
|
|
{
|
|
// Is this result-set even valid?
|
|
if (!mPtr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set");
|
|
}
|
|
// Did we come from a statement?
|
|
if (mStatement)
|
|
{
|
|
// Step the statement
|
|
return !mysql_stmt_fetch(mStatement->mPtr);
|
|
}
|
|
// Fetch another row from the result set
|
|
mRow = mysql_fetch_row(mPtr);
|
|
// Fetch the data lengths
|
|
mLengths = mysql_fetch_lengths(mPtr);
|
|
// Return whether the fetched row is valid
|
|
return (mRow != NULL);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
bool ResHnd::SetRowIndex(Uint64 index)
|
|
{
|
|
// Is this result-set even valid?
|
|
if (!mPtr)
|
|
{
|
|
STHROWF("Invalid MySQL result-set");
|
|
}
|
|
// Did we come from a statement?
|
|
else if (mStatement)
|
|
{
|
|
mysql_stmt_data_seek(mStatement->mPtr, index);
|
|
}
|
|
else
|
|
{
|
|
mysql_data_seek(mPtr, index);
|
|
}
|
|
// Step the result set
|
|
return Next();
|
|
}
|
|
|
|
} // Namespace:: SqMod
|