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Started adding support for SELECT statement.

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git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@642 0109f412-320b-0410-ab79-c3e0c5ffbbe6
This commit is contained in:
dsandersoremutah
2006-07-10 23:10:01 +00:00
parent 0b1c41a805
commit 91816d4c49
14 changed files with 1108 additions and 191 deletions
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109
sql/src/updaterow.cpp
View File

@@ -25,6 +25,13 @@
#include "flaimsys.h"
static const char * gv_setExprTerminators [3] =
{
"where",
",",
NULL
};
FSTATIC RCODE convertValueToStringFormat(
SQL_VALUE * pSqlValue,
F_COLUMN * pColumn,
@@ -1005,14 +1012,14 @@ Exit:
}
//------------------------------------------------------------------------------
// Desc: Process the UPDATE statement. The "UPDATE" keyword has already been
// parsed.
// Desc: Parse the columns that are to be set in the UPDATE statement.
//------------------------------------------------------------------------------
RCODE SQLStatement::parseSetColumns(
TABLE_ITEM * pTableList,
COLUMN_SET ** ppFirstColumnSet,
COLUMN_SET ** ppLastColumnSet,
FLMUINT * puiNumColumnsToSet)
FLMUINT * puiNumColumnsToSet,
FLMBOOL * pbHadWhere)
{
RCODE rc = NE_SFLM_OK;
char szToken [MAX_SQL_TOKEN_SIZE + 1];
@@ -1024,6 +1031,8 @@ RCODE SQLStatement::parseSetColumns(
COLUMN_SET * pColumnSet;
SQLQuery * pSqlQuery = NULL;
*pbHadWhere = FALSE;
// Must have the keyword "SET"
if (RC_BAD( rc = haveToken( "set", FALSE, SQL_ERR_EXPECTING_SET)))
@@ -1131,9 +1140,41 @@ RCODE SQLStatement::parseSetColumns(
// Now parse the criteria for the SET command, unless NULL has already
// been detected.
if (pSqlQuery)
if (!pSqlQuery)
{
if (RC_BAD( rc = parseCriteria( pTableList, FALSE, TRUE, pSqlQuery)))
if (RC_BAD( rc = getToken( szToken, sizeof( szToken), TRUE,
&uiTokenLineOffset, NULL)))
{
if (rc == NE_SFLM_EOF_HIT)
{
rc = NE_SFLM_OK;
break;
}
goto Exit;
}
else if (f_stricmp( szToken, "where") == 0)
{
*pbHadWhere = TRUE;
break;
}
else if (f_stricmp( szToken, ",") != 0)
{
setErrInfo( m_uiCurrLineNum,
uiTokenLineOffset,
SQL_ERR_EXPECTING_COMMA,
m_uiCurrLineFilePos,
m_uiCurrLineBytes);
rc = RC_SET( NE_SFLM_INVALID_SQL);
goto Exit;
}
}
else
{
const char * pszTerminator;
if (RC_BAD( rc = parseCriteria( pTableList,
&gv_setExprTerminators [0], TRUE,
&pszTerminator, pSqlQuery)))
{
goto Exit;
}
@@ -1146,44 +1187,22 @@ RCODE SQLStatement::parseSetColumns(
{
goto Exit;
}
}
// Next token should either be a comma or the WHERE keyword, or we
// should have hit EOF.
if (RC_BAD( rc = getToken( szToken, sizeof( szToken), TRUE,
&uiTokenLineOffset)))
{
if (rc == NE_SFLM_EOF_HIT)
// Next token should either be a comma or the WHERE keyword, or we
// should have hit EOF. pszTerminator will return NULL if EOF was
// hit.
if (!pszTerminator)
{
rc = NE_SFLM_OK;
break;
}
else
if (f_stricmp( pszTerminator, "where") == 0)
{
goto Exit;
*pbHadWhere = TRUE;
break;
}
}
if (f_stricmp( szToken, "where") == 0)
{
// Push the WHERE token back into the input stream - so that
// the caller can handle it.
m_uiCurrLineOffset = uiTokenLineOffset;
break;
}
else if (f_stricmp( szToken, ",") != 0)
{
setErrInfo( m_uiCurrLineNum,
uiTokenLineOffset,
SQL_ERR_EXPECTING_COMMA,
m_uiCurrLineFilePos,
m_uiCurrLineBytes);
rc = RC_SET( NE_SFLM_INVALID_SQL);
goto Exit;
}
}
Exit:
@@ -1207,6 +1226,7 @@ RCODE SQLStatement::processUpdateRows( void)
COLUMN_SET * pLastColumnSet = NULL;
FLMUINT uiNumColumnsToSet = 0;
SQLQuery sqlQuery;
FLMBOOL bHadWhere;
// If we are in a read transaction, we cannot do this operation
@@ -1250,31 +1270,24 @@ RCODE SQLStatement::processUpdateRows( void)
tableList [1].uiTableNum = 0;
if (RC_BAD( rc = parseSetColumns( &tableList [0], &pFirstColumnSet,
&pLastColumnSet, &uiNumColumnsToSet)))
&pLastColumnSet, &uiNumColumnsToSet,
&bHadWhere)))
{
goto Exit;
}
// See if we have a WHERE clause
if (RC_BAD( rc = haveToken( "where", TRUE)))
if (!bHadWhere)
{
if (rc == NE_SFLM_NOT_FOUND || rc == NE_SFLM_EOF_HIT)
{
if (RC_BAD( rc = sqlQuery.addTable( pTable->uiTableNum, NULL)))
{
goto Exit;
}
}
else
if (RC_BAD( rc = sqlQuery.addTable( pTable->uiTableNum, NULL)))
{
goto Exit;
}
}
else
{
if (RC_BAD( rc = parseCriteria( &tableList [0], FALSE, FALSE, &sqlQuery)))
if (RC_BAD( rc = parseCriteria( &tableList [0], NULL, TRUE, NULL, &sqlQuery)))
{
goto Exit;
}