public SysVarPrimary SystemVariable()
{
SysVarPrimary sys;
VariableScope scope = VariableScope.Session;
string str = lexer.StringValue;
string strUp = lexer.StringValueUppercase;
Match(MySQLToken.SYS_VAR);
SpecialIdentifier si = SpecialIdentifier.Global;
if (Enum.TryParse <SpecialIdentifier>(strUp, out si))
{
switch (si)
{
case SpecialIdentifier.Global:
scope = VariableScope.Global;
break;
case SpecialIdentifier.Session:
case SpecialIdentifier.Local:
Match(MySQLToken.PUNC_DOT);
str = lexer.StringValue;
strUp = lexer.StringValueUppercase;
Match(MySQLToken.IDENTIFIER);
sys = new SysVarPrimary(scope, str, strUp);
sys.SetCacheEvalRst(cacheEvalRst);
return(sys);
}
}
sys = new SysVarPrimary(scope, str, strUp);
sys.SetCacheEvalRst(cacheEvalRst);
return(sys);
}
private SelectStatement.SelectOption SelectOption()
{
SelectStatement.SelectOption option = new SelectStatement.SelectOption();
MySQLToken token = MySQLToken.NONE;
for (; ; lexer.NextToken())
{
token = lexer.Token();
if (token == MySQLToken.KW_ALL)
{
option.resultDup = SelectStatement.SelectDuplicationStrategy.All;
}
else if (token == MySQLToken.KW_DISTINCT)
{
option.resultDup = SelectStatement.SelectDuplicationStrategy.Distinct;
}
else if (token == MySQLToken.KW_DISTINCTROW)
{
option.resultDup = SelectStatement.SelectDuplicationStrategy.DistinctRow;
}
else if (token == MySQLToken.KW_HIGH_PRIORITY)
{
option.highPriority = true;
}
else if (token == MySQLToken.KW_STRAIGHT_JOIN)
{
option.straightJoin = true;
}
else if (token == MySQLToken.KW_SQL_SMALL_RESULT)
{
option.resultSize = SelectStatement.SmallOrBigResult.SqlSmallResult;
}
else if (token == MySQLToken.KW_SQL_BIG_RESULT)
{
option.resultSize = SelectStatement.SmallOrBigResult.SqlBigResult;
}
else if (token == MySQLToken.KW_SQL_CALC_FOUND_ROWS)
{
option.sqlCalcFoundRows = true;
}
else if (token == MySQLToken.IDENTIFIER)
{
string optionStringUp = lexer.StringValueUppercase;
SpecialIdentifier specialId = SpecialIdentifier.SqlBufferResult;
if (Enum.TryParse <SpecialIdentifier>(optionStringUp, out specialId))
{
switch (specialId)
{
case SpecialIdentifier.SqlBufferResult:
if (option.sqlBufferResult)
{
return(option);
}
option.sqlBufferResult = true;
break;
case SpecialIdentifier.SqlCache:
if (option.queryCache != SelectStatement.QueryCacheStrategy.Undefine)
{
return(option);
}
option.queryCache = SelectStatement.QueryCacheStrategy.SqlCache;
break;
case SpecialIdentifier.SqlNoCache:
if (option.queryCache != SelectStatement.QueryCacheStrategy.Undefine)
{
return(option);
}
option.queryCache = SelectStatement.QueryCacheStrategy.SqlNoCache;
break;
}
}
}
else
{
return(option);
}
}
}
