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Latest round of changes for SQL query optimization.

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git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@709 0109f412-320b-0410-ab79-c3e0c5ffbbe6
This commit is contained in:
dsandersoremutah
2006-07-25 22:40:53 +00:00
parent 33e39a5d44
commit a7e6b942f8
20 changed files with 1435 additions and 476 deletions
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104
sql/src/whereclause.cpp
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@@ -82,11 +82,7 @@ SQLQuery::SQLQuery()
m_pLastOrderBy = NULL;
m_bResolveNames = FALSE;
m_bOptimized = FALSE;
m_bScan = FALSE;
m_bScanIndex = FALSE;
m_bEmpty = FALSE;
m_uiIndexNum = 0;
m_bIndexSet = FALSE;
m_pQuery = NULL;
m_pDatabase = NULL;
m_pDb = NULL;
@@ -94,12 +90,67 @@ SQLQuery::SQLQuery()
m_pPrev = NULL;
}
//-------------------------------------------------------------------------
// Desc: freel all of the SQL_KEY structures associated with an SQL_INDEX.
//-------------------------------------------------------------------------
void freeIndexKeys(
SQL_INDEX * pSQLIndex)
{
SQL_KEY * pSQLKey;
for (pSQLKey = pSQLIndex->pFirstSQLKey; pSQLKey; pSQLKey = pSQLKey->pNext)
{
if (pSQLKey->pFSIndexCursor)
{
pSQLKey->pFSIndexCursor->Release();
pSQLKey->pFSIndexCursor = NULL;
}
}
pSQLIndex->pFirstSQLKey = NULL;
pSQLIndex->pLastSQLKey = NULL;
}
//-------------------------------------------------------------------------
// Desc: Free all of the SQL_INDEX structures associated with an SQL_TABLE.
//-------------------------------------------------------------------------
void freeTableIndexes(
SQL_TABLE * pSQLTable)
{
SQL_INDEX * pSQLIndex;
for (pSQLIndex = pSQLTable->pFirstSQLIndex; pSQLIndex; pSQLIndex = pSQLIndex->pNext)
{
freeIndexKeys( pSQLIndex);
}
pSQLTable->pFirstSQLIndex = NULL;
pSQLTable->pLastSQLIndex = NULL;
}
//-------------------------------------------------------------------------
// Desc: Destructor
//-------------------------------------------------------------------------
SQLQuery::~SQLQuery()
{
SQL_TABLE * pSQLTable;
// Free all of the table and index cursors.
for (pSQLTable = m_pFirstSQLTable; pSQLTable; pSQLTable = pSQLTable->pNext)
{
if (pSQLTable->pFSTableCursor)
{
pSQLTable->pFSTableCursor->Release();
pSQLTable->pFSTableCursor = NULL;
}
freeTableIndexes( pSQLTable);
}
// Free all of the memory allocated from the memory pool.
m_pool.poolFree();
// Unlink the query from the database it is associated with.
if (m_pDatabase)
{
m_pDatabase->lockMutex();
@@ -512,6 +563,12 @@ RCODE SQLQuery::addTable(
}
m_pLastSQLTable = pSQLTable;
}
// These should have been set by the poolCalloc.
// pSQLTable->bScan = FALSE;
// pSQLTable->uiIndexNum = 0;
if (ppSQLTable)
{
*ppSQLTable = pSQLTable;
@@ -1147,6 +1204,45 @@ Exit:
return( rc);
}
//-------------------------------------------------------------------------
// Desc: Set an index on a table.
//-------------------------------------------------------------------------
RCODE SQLQuery::setIndex(
FLMUINT uiTableNum,
FLMUINT uiIndexNum)
{
RCODE rc = NE_SFLM_OK;
SQL_TABLE * pSQLTable;
flmAssert( !m_bOptimized);
// Find the table structure for the table - should already exist.
pSQLTable = m_pFirstSQLTable;
while (pSQLTable && pSQLTable->uiTableNum != uiTableNum)
{
pSQLTable = pSQLTable->pNext;
}
if (!pSQLTable)
{
rc = RC_BAD( NE_SFLM_Q_INVALID_TABLE_FOR_INDEX);
goto Exit;
}
if ((pSQLTable->uiIndexNum = uiIndexNum) == 0)
{
pSQLTable->bScan = TRUE;
}
else
{
pSQLTable->bScan = FALSE;
}
Exit:
return( rc);
}
//------------------------------------------------------------------------------
// Desc: Determine if the current token is one that would terminate the
// expression.