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MCOL-361 String::c_ptr() can cause a realloc and break things. Remove all uses of c_ptr to String objects from the server.

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This commit is contained in:
David Hall
2016-11-01 16:07:13 -05:00
parent c2988cfbf5
commit 086a98794e
2 changed files with 67 additions and 44 deletions
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82
dbcon/mysql/ha_calpont_execplan.cpp
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@ -21,7 +21,7 @@
*/
/** @file */
#define DEBUG_WALK_COND
//#define DEBUG_WALK_COND
#include <my_config.h>
#include <string>
#include <iostream>
@ -222,7 +222,9 @@ void debug_walk(const Item *item, void *arg)
{
Item_string* isp = (Item_string*)item;
String val, *str = isp->val_str(&val);
cout << "STRING_ITEM: >" << str->c_ptr() << '<' << endl;
string valStr;
valStr.assign(str->ptr(), str->length());
cout << "STRING_ITEM: >" << valStr << '<' << endl;
break;
}
case Item::REAL_ITEM:
@ -2293,9 +2295,11 @@ ReturnedColumn* buildReturnedColumn(Item* item, gp_walk_info& gwi, bool& nonSupp
case Item::VARBIN_ITEM:
{
String val, *str = item->val_str(&val);
string valStr;
valStr.assign(str->ptr(), str->length());
if (item->unsigned_flag)
{
//cc = new ConstantColumn(str->c_ptr(), (uint64_t)item->val_uint(), ConstantColumn::NUM);
//cc = new ConstantColumn(valStr, (uint64_t)item->val_uint(), ConstantColumn::NUM);
// It seems that str at this point is crap if val_uint() is > MAX_BIGINT. By using
// this constructor, ConstantColumn is built with the proper string. For whatever reason,
// ExeMgr converts the fConstval member to numeric, rather than using the existing numeric
@ -2304,7 +2308,7 @@ ReturnedColumn* buildReturnedColumn(Item* item, gp_walk_info& gwi, bool& nonSupp
}
else
{
rc = new ConstantColumn(str->c_ptr(), (int64_t)item->val_int(), ConstantColumn::NUM);
rc = new ConstantColumn(valStr, (int64_t)item->val_int(), ConstantColumn::NUM);
}
//return cc;
break;
@ -2312,13 +2316,17 @@ ReturnedColumn* buildReturnedColumn(Item* item, gp_walk_info& gwi, bool& nonSupp
case Item::STRING_ITEM:
{
String val, *str = item->val_str(&val);
rc = new ConstantColumn(str->c_ptr());
string valStr;
valStr.assign(str->ptr(), str->length());
rc = new ConstantColumn(valStr);
break;
}
case Item::REAL_ITEM:
{
String val, *str = item->val_str(&val);
rc = new ConstantColumn(str->c_ptr(), item->val_real());
string valStr;
valStr.assign(str->ptr(), str->length());
rc = new ConstantColumn(valStr, item->val_real());
break;
}
case Item::DECIMAL_ITEM:
@ -2351,20 +2359,25 @@ ReturnedColumn* buildReturnedColumn(Item* item, gp_walk_info& gwi, bool& nonSupp
(tmpVec.size() == 0))
{
String val, *str = ifp->val_str(&val);
string valStr;
if (str)
{
valStr.assign(str->ptr(), str->length());
}
if (!str)
{
rc = new ConstantColumn("", ConstantColumn::NULLDATA);
}
else if (ifp->result_type() == STRING_RESULT)
{
rc = new ConstantColumn(str->c_ptr(), ConstantColumn::LITERAL);
rc = new ConstantColumn(valStr, ConstantColumn::LITERAL);
rc->resultType(colType_MysqlToIDB(item));
}
else if (ifp->result_type() == DECIMAL_RESULT)
rc = buildDecimalColumn(ifp, gwi);
else
{
rc = new ConstantColumn(str->c_ptr(), ConstantColumn::NUM);
rc = new ConstantColumn(valStr, ConstantColumn::NUM);
rc->resultType(colType_MysqlToIDB(item));
}
break;
@ -2431,7 +2444,9 @@ ReturnedColumn* buildReturnedColumn(Item* item, gp_walk_info& gwi, bool& nonSupp
case Item::DATE_ITEM:
{
String val, *str = item->val_str(&val);
rc = new ConstantColumn(str->c_ptr());
string valStr;
valStr.assign(str->ptr(), str->length());
rc = new ConstantColumn(valStr);
break;
}
case Item::WINDOW_FUNC_ITEM:
@ -3206,18 +3221,20 @@ ConstantColumn* buildDecimalColumn(Item *item, gp_walk_info &gwi)
Item_decimal* idp = (Item_decimal*)item;
IDB_Decimal infinidb_decimal;
String val, *str = item->val_str(&val);
string valStr;
valStr.assign(str->ptr(), str->length());
ostringstream infinidb_decimal_val;
uint32_t i = 0;
if (str->c_ptr()[0] == '+' || str->c_ptr()[0] == '-')
if (str->ptr()[0] == '+' || str->ptr()[0] == '-')
{
infinidb_decimal_val << str->c_ptr()[0];
infinidb_decimal_val << str->ptr()[0];
i = 1;
}
for (; i < str->length(); i++)
{
if (str->c_ptr()[i] == '.')
if (str->ptr()[i] == '.')
continue;
infinidb_decimal_val << str->c_ptr()[i];
infinidb_decimal_val << str->ptr()[i];
}
infinidb_decimal.value = strtoll(infinidb_decimal_val.str().c_str(), 0, 10);
@ -3230,7 +3247,7 @@ ConstantColumn* buildDecimalColumn(Item *item, gp_walk_info &gwi)
else
infinidb_decimal.scale = idp->decimals;
infinidb_decimal.precision = idp->max_length - idp->decimals;
return new ConstantColumn(str->c_ptr(), infinidb_decimal);
return new ConstantColumn(valStr, infinidb_decimal);
}
SimpleColumn* buildSimpleColumn(Item_field* ifp, gp_walk_info& gwi)
@ -3490,7 +3507,11 @@ ReturnedColumn* buildAggregateColumn(Item* item, gp_walk_info& gwi)
(dynamic_cast<GroupConcatColumn*>(ac))->orderCols(orderCols);
parm.reset(rowCol);
if (gc->str_separator())
(dynamic_cast<GroupConcatColumn*>(ac))->separator(gc->str_separator()->c_ptr());
{
string separator;
separator.assign(gc->str_separator()->ptr(), gc->str_separator()->length());
(dynamic_cast<GroupConcatColumn*>(ac))->separator(separator);
}
}
else
{
@ -3927,7 +3948,7 @@ void gp_walk(const Item *item, void *arg)
string cval;
if (str->ptr())
{
cval = str->c_ptr();
cval.assign(str->ptr(), str->length());
}
size_t spos = cval.find_last_not_of(" ");
if (spos != string::npos)
@ -4040,7 +4061,8 @@ void gp_walk(const Item *item, void *arg)
ifp->functype() != Item_func::MULT_EQUAL_FUNC)
{
String val, *str = ifp->val_str(&val);
string valStr;
valStr.assign(str->ptr(), str->length());
ConstantColumn *cc = NULL;
if (!str) //@ bug 2844 check whether parameter is defined
{
@ -4048,7 +4070,7 @@ void gp_walk(const Item *item, void *arg)
}
else if (ifp->result_type() == STRING_RESULT)
{
cc = new ConstantColumn(str->c_ptr(), ConstantColumn::LITERAL);
cc = new ConstantColumn(valStr, ConstantColumn::LITERAL);
}
else if (ifp->result_type() == DECIMAL_RESULT)
{
@ -4056,7 +4078,7 @@ void gp_walk(const Item *item, void *arg)
}
else
{
cc = new ConstantColumn(str->c_ptr(), ConstantColumn::NUM);
cc = new ConstantColumn(valStr, ConstantColumn::NUM);
cc->resultType(colType_MysqlToIDB(item));
}
@ -4077,7 +4099,7 @@ void gp_walk(const Item *item, void *arg)
else
gwip->rcWorkStack.push(cc);
if (str)
IDEBUG( cout << "Const F&E " << item->full_name() << " evaluate: " << str->c_ptr() << endl );
IDEBUG( cout << "Const F&E " << item->full_name() << " evaluate: " << valStr << endl );
break;
}
@ -4707,11 +4729,8 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, bool i
// @todo process from subquery
if (table_ptr->derived)
{
// cout << "DERIVED TABLE DEBUG" << endl;
String str;
(table_ptr->derived->first_select())->print(gwi.thd, &str, QT_INFINIDB_DERIVED);
// cout << str.c_ptr() << endl;
// cout << "DERIVED TABLE DEBUG END" << endl;
SELECT_LEX *select_cursor = table_ptr->derived->first_select();
FromSubQuery fromSub(gwi, select_cursor);
@ -5228,6 +5247,8 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, bool i
string(ifp->func_name()) != "set_user_var")
{
String val, *str = ifp->val_str(&val);
string valStr;
valStr.assign(str->ptr(), str->length());
ConstantColumn *cc = NULL;
if (!str)
{
@ -5235,7 +5256,7 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, bool i
}
else if (ifp->result_type() == STRING_RESULT)
{
cc = new ConstantColumn(str->c_ptr(), ConstantColumn::LITERAL);
cc = new ConstantColumn(valStr, ConstantColumn::LITERAL);
}
else if (ifp->result_type() == DECIMAL_RESULT)
{
@ -5243,7 +5264,7 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, bool i
}
else
{
cc = new ConstantColumn(str->c_ptr(), ConstantColumn::NUM);
cc = new ConstantColumn(valStr, ConstantColumn::NUM);
cc->resultType(colType_MysqlToIDB(item));
}
SRCP srcp(cc);
@ -5342,9 +5363,10 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, bool i
srcp->alias(item->name);
Item_string* isp = reinterpret_cast<Item_string*>(item);
String val;
String* str = isp->val_str(&val);
string name = "'" + string(str->c_ptr()) + "'" + " " + "`" + escapeBackTick(srcp->alias().c_str()) + "`";
String val, *str = isp->val_str(&val);
string valStr;
valStr.assign(str->ptr(), str->length());
string name = "'" + valStr + "'" + " " + "`" + escapeBackTick(srcp->alias().c_str()) + "`";
if (sel_cols_in_create.length() != 0)
sel_cols_in_create += ", ";
@ -5366,8 +5388,10 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, bool i
Item_decimal* isp = reinterpret_cast<Item_decimal*>(item);
String val, *str = isp->val_str(&val);
string valStr;
valStr.assign(str->ptr(), str->length());
ostringstream oss;
oss << str->c_ptr() << " `" << escapeBackTick(srcp->alias().c_str()) << "`";
oss << valStr.c_str() << " `" << escapeBackTick(srcp->alias().c_str()) << "`";
if (sel_cols_in_create.length() != 0)
sel_cols_in_create += ", ";
sel_cols_in_create += oss.str();