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ma_statement.c
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ma_statement.c
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/************************************************************************************
Copyright (C) 2013,2019 MariaDB Corporation AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not see <http://www.gnu.org/licenses>
or write to the Free Software Foundation, Inc.,
51 Franklin St., Fifth Floor, Boston, MA 02110, USA
*************************************************************************************/
#include <ma_odbc.h>
#define MADB_MIN_QUERY_LEN 5
struct st_ma_stmt_methods MADB_StmtMethods; /* declared at the end of file */
/* {{{ MADB_StmtInit */
SQLRETURN MADB_StmtInit(MADB_Dbc *Connection, SQLHANDLE *pHStmt)
{
MADB_Stmt *Stmt= NULL;
if (!(Stmt = (MADB_Stmt *)MADB_CALLOC(sizeof(MADB_Stmt))))
goto error;
MADB_PutErrorPrefix(Connection, &Stmt->Error);
*pHStmt= Stmt;
Stmt->Connection= Connection;
LOCK_MARIADB(Connection);
if (!(Stmt->stmt= MADB_NewStmtHandle(Stmt)) ||
!(Stmt->IApd= MADB_DescInit(Connection, MADB_DESC_APD, FALSE)) ||
!(Stmt->IArd= MADB_DescInit(Connection, MADB_DESC_ARD, FALSE)) ||
!(Stmt->IIpd= MADB_DescInit(Connection, MADB_DESC_IPD, FALSE)) ||
!(Stmt->IIrd= MADB_DescInit(Connection, MADB_DESC_IRD, FALSE)))
{
UNLOCK_MARIADB(Stmt->Connection);
goto error;
}
MDBUG_C_PRINT(Stmt->Connection, "-->inited %0x", Stmt->stmt);
UNLOCK_MARIADB(Connection);
Stmt->PutParam= -1;
Stmt->Methods= &MADB_StmtMethods;
/* default behaviour is SQL_CURSOR_STATIC */
Stmt->Options.CursorType= SQL_CURSOR_STATIC;
Stmt->Options.UseBookmarks= SQL_UB_OFF;
Stmt->Options.MetadataId= Connection->MetadataId;
Stmt->Apd= Stmt->IApd;
Stmt->Ard= Stmt->IArd;
Stmt->Ipd= Stmt->IIpd;
Stmt->Ird= Stmt->IIrd;
Stmt->ListItem.data= (void *)Stmt;
EnterCriticalSection(&Stmt->Connection->ListsCs);
Stmt->Connection->Stmts= MADB_ListAdd(Stmt->Connection->Stmts, &Stmt->ListItem);
LeaveCriticalSection(&Stmt->Connection->ListsCs);
Stmt->Ard->Header.ArraySize= 1;
return SQL_SUCCESS;
error:
if (Stmt && Stmt->stmt)
{
MADB_STMT_CLOSE_STMT(Stmt);
}
MADB_DescFree(Stmt->IApd, TRUE);
MADB_DescFree(Stmt->IArd, TRUE);
MADB_DescFree(Stmt->IIpd, TRUE);
MADB_DescFree(Stmt->IIrd, TRUE);
MADB_FREE(Stmt);
return SQL_ERROR;
}
/* }}} */
/* {{{ MADB_ExecuteQuery */
SQLRETURN MADB_ExecuteQuery(MADB_Stmt * Stmt, char *StatementText, SQLINTEGER TextLength)
{
SQLRETURN ret= SQL_ERROR;
LOCK_MARIADB(Stmt->Connection);
if (StatementText)
{
MDBUG_C_PRINT(Stmt->Connection, "mysql_real_query(%0x,%s,%lu)", Stmt->Connection->mariadb, StatementText, TextLength);
if(!mysql_real_query(Stmt->Connection->mariadb, StatementText, TextLength))
{
ret= SQL_SUCCESS;
MADB_CLEAR_ERROR(&Stmt->Error);
Stmt->AffectedRows= mysql_affected_rows(Stmt->Connection->mariadb);
}
else
{
MADB_SetNativeError(&Stmt->Error, SQL_HANDLE_DBC, Stmt->Connection->mariadb);
}
}
else
MADB_SetError(&Stmt->Error, MADB_ERR_HY001, mysql_error(Stmt->Connection->mariadb),
mysql_errno(Stmt->Connection->mariadb));
UNLOCK_MARIADB(Stmt->Connection);
return ret;
}
/* }}} */
/* {{{ MADB_StmtBulkOperations */
SQLRETURN MADB_StmtBulkOperations(MADB_Stmt *Stmt, SQLSMALLINT Operation)
{
MADB_CLEAR_ERROR(&Stmt->Error);
switch(Operation)
{
case SQL_ADD:
return Stmt->Methods->SetPos(Stmt, 0, SQL_ADD, SQL_LOCK_NO_CHANGE, 0);
default:
return SQL_ERROR;
}
}
/* }}} */
/* {{{ RemoveStmtRefFromDesc
Helper function removing references to the stmt in the descriptor when explisitly allocated descriptor is substituted
by some other descriptor */
void RemoveStmtRefFromDesc(MADB_Desc *desc, MADB_Stmt *Stmt, BOOL all)
{
if (desc->AppType)
{
unsigned int i;
for (i=0; i < desc->Stmts.elements; ++i)
{
MADB_Stmt **refStmt= ((MADB_Stmt **)desc->Stmts.buffer) + i;
if (Stmt == *refStmt)
{
MADB_DeleteDynamicElement(&desc->Stmts, i);
if (!all)
{
return;
}
}
}
}
}
/* }}} */
/* {{{ ResetMetadata */
void ResetMetadata(MYSQL_RES** metadata, MYSQL_RES* new_metadata)
{
if (*metadata != NULL)
{
mysql_free_result(*metadata);
}
*metadata= new_metadata;
}
/* }}} */
/* {{{ MADB_StmtFree */
SQLRETURN MADB_StmtFree(MADB_Stmt *Stmt, SQLUSMALLINT Option)
{
if (!Stmt)
return SQL_INVALID_HANDLE;
switch (Option) {
case SQL_CLOSE:
if (Stmt->stmt)
{
if (Stmt->Ird)
MADB_DescFree(Stmt->Ird, TRUE);
if (Stmt->State > MADB_SS_PREPARED && !QUERY_IS_MULTISTMT(Stmt->Query))
{
MDBUG_C_PRINT(Stmt->Connection, "mysql_stmt_free_result(%0x)", Stmt->stmt);
mysql_stmt_free_result(Stmt->stmt);
LOCK_MARIADB(Stmt->Connection);
MDBUG_C_PRINT(Stmt->Connection, "-->resetting %0x", Stmt->stmt);
mysql_stmt_reset(Stmt->stmt);
UNLOCK_MARIADB(Stmt->Connection);
}
if (QUERY_IS_MULTISTMT(Stmt->Query) && Stmt->MultiStmts)
{
unsigned int i;
LOCK_MARIADB(Stmt->Connection);
for (i=0; i < STMT_COUNT(Stmt->Query); ++i)
{
if (Stmt->MultiStmts[i] != NULL)
{
MDBUG_C_PRINT(Stmt->Connection, "-->resetting %0x(%u)", Stmt->MultiStmts[i], i);
mysql_stmt_reset(Stmt->MultiStmts[i]);
}
}
UNLOCK_MARIADB(Stmt->Connection);
}
ResetMetadata(&Stmt->metadata, NULL);
MADB_FREE(Stmt->result);
MADB_FREE(Stmt->CharOffset);
MADB_FREE(Stmt->Lengths);
RESET_STMT_STATE(Stmt);
RESET_DAE_STATUS(Stmt);
}
break;
case SQL_UNBIND:
MADB_FREE(Stmt->result);
MADB_DescFree(Stmt->Ard, TRUE);
break;
case SQL_RESET_PARAMS:
MADB_FREE(Stmt->params);
MADB_DescFree(Stmt->Apd, TRUE);
RESET_DAE_STATUS(Stmt);
break;
case SQL_DROP:
MADB_FREE(Stmt->params);
MADB_FREE(Stmt->result);
MADB_FREE(Stmt->Cursor.Name);
MADB_FREE(Stmt->CatalogName);
MADB_FREE(Stmt->TableName);
ResetMetadata(&Stmt->metadata, NULL);
/* For explicit descriptors we only remove reference to the stmt*/
if (Stmt->Apd->AppType)
{
EnterCriticalSection(&Stmt->Connection->ListsCs);
RemoveStmtRefFromDesc(Stmt->Apd, Stmt, TRUE);
LeaveCriticalSection(&Stmt->Connection->ListsCs);
MADB_DescFree(Stmt->IApd, FALSE);
}
else
{
MADB_DescFree( Stmt->Apd, FALSE);
}
if (Stmt->Ard->AppType)
{
EnterCriticalSection(&Stmt->Connection->ListsCs);
RemoveStmtRefFromDesc(Stmt->Ard, Stmt, TRUE);
LeaveCriticalSection(&Stmt->Connection->ListsCs);
MADB_DescFree(Stmt->IArd, FALSE);
}
else
{
MADB_DescFree(Stmt->Ard, FALSE);
}
MADB_DescFree(Stmt->Ipd, FALSE);
MADB_DescFree(Stmt->Ird, FALSE);
MADB_FREE(Stmt->CharOffset);
MADB_FREE(Stmt->Lengths);
ResetMetadata(&Stmt->DefaultsResult, NULL);
if (Stmt->DaeStmt != NULL)
{
Stmt->DaeStmt->Methods->StmtFree(Stmt->DaeStmt, SQL_DROP);
Stmt->DaeStmt= NULL;
}
EnterCriticalSection(&Stmt->Connection->cs);
/* TODO: if multistatement was prepared, but not executed, we would get here Stmt->stmt leaked. Unlikely that is very probable scenario,
thus leaving this for new version */
if (QUERY_IS_MULTISTMT(Stmt->Query) && Stmt->MultiStmts)
{
unsigned int i;
for (i= 0; i < STMT_COUNT(Stmt->Query); ++i)
{
/* This dirty hack allows to avoid crash in case stmt object was not allocated
TODO: The better place for this check would be where MultiStmts was not allocated
to avoid inconsistency(MultiStmtCount > 0 and MultiStmts is NULL */
if (Stmt->MultiStmts!= NULL && Stmt->MultiStmts[i] != NULL)
{
MDBUG_C_PRINT(Stmt->Connection, "-->closing %0x(%u)", Stmt->MultiStmts[i], i);
mysql_stmt_close(Stmt->MultiStmts[i]);
}
}
MADB_FREE(Stmt->MultiStmts);
Stmt->MultiStmtNr= 0;
}
else if (Stmt->stmt != NULL)
{
MDBUG_C_PRINT(Stmt->Connection, "-->closing %0x", Stmt->stmt);
MADB_STMT_CLOSE_STMT(Stmt);
}
/* Query has to be deleted after multistmt handles are closed, since the depends on info in the Query */
MADB_DeleteQuery(&Stmt->Query);
LeaveCriticalSection(&Stmt->Connection->cs);
EnterCriticalSection(&Stmt->Connection->ListsCs);
Stmt->Connection->Stmts= MADB_ListDelete(Stmt->Connection->Stmts, &Stmt->ListItem);
LeaveCriticalSection(&Stmt->Connection->ListsCs);
MADB_FREE(Stmt);
} /* End of switch (Option) */
return SQL_SUCCESS;
}
/* }}} */
/* {{{ MADB_CheckIfExecDirectPossible
Checking if we can deploy mariadb_stmt_execute_direct */
BOOL MADB_CheckIfExecDirectPossible(MADB_Stmt *Stmt)
{
return MADB_ServerSupports(Stmt->Connection, MADB_CAPABLE_EXEC_DIRECT)
&& !(Stmt->Apd->Header.ArraySize > 1) /* With array of parameters exec_direct will be not optimal */
&& MADB_FindNextDaeParam(Stmt->Apd, -1, 1) == MADB_NOPARAM;
}
/* }}} */
/* {{{ MADB_BulkInsertPossible
Checking if we can deploy mariadb_stmt_execute_direct */
BOOL MADB_BulkInsertPossible(MADB_Stmt *Stmt)
{
return MADB_ServerSupports(Stmt->Connection, MADB_CAPABLE_PARAM_ARRAYS)
&& (Stmt->Apd->Header.ArraySize > 1)
&& (Stmt->Apd->Header.BindType == SQL_PARAM_BIND_BY_COLUMN) /* First we support column-wise binding */
&& (Stmt->Query.QueryType == MADB_QUERY_INSERT || Stmt->Query.QueryType == MADB_QUERY_UPDATE)
&& MADB_FindNextDaeParam(Stmt->Apd, -1, 1) == MADB_NOPARAM; /* TODO: should be not very hard ot optimize to use bulk in this
case for chunks of the array, delimitered by param rows with DAE
In particular, MADB_FindNextDaeParam should consider Stmt->ArrayOffset */
}
/* }}} */
/* {{{ MADB_StmtExecDirect */
SQLRETURN MADB_StmtExecDirect(MADB_Stmt *Stmt, char *StatementText, SQLINTEGER TextLength)
{
SQLRETURN ret;
BOOL ExecDirect= TRUE;
ret= Stmt->Methods->Prepare(Stmt, StatementText, TextLength, ExecDirect);
/* In case statement is not supported, we use mysql_query instead */
if (!SQL_SUCCEEDED(ret))
{
/* This is not quite good - 1064 may simply mean that syntax is wrong. we are screwed then */
if ((Stmt->Error.NativeError == 1295/*ER_UNSUPPORTED_PS*/ ||
Stmt->Error.NativeError == 1064/*ER_PARSE_ERROR*/))
{
Stmt->State= MADB_SS_EMULATED;
}
else
{
return ret;
}
}
/* For multistmt we don't use mariadb_stmt_execute_direct so far */
if (QUERY_IS_MULTISTMT(Stmt->Query))
{
ExecDirect= FALSE;
}
return Stmt->Methods->Execute(Stmt, ExecDirect);
}
/* }}} */
/* {{{ MADB_FindCursor */
MADB_Stmt *MADB_FindCursor(MADB_Stmt *Stmt, const char *CursorName)
{
MADB_Dbc *Dbc= Stmt->Connection;
MADB_List *LStmt, *LStmtNext;
for (LStmt= Dbc->Stmts; LStmt; LStmt= LStmtNext)
{
MADB_Cursor *Cursor= &((MADB_Stmt *)LStmt->data)->Cursor;
LStmtNext= LStmt->next;
if (Stmt != (MADB_Stmt *)LStmt->data &&
Cursor->Name && _stricmp(Cursor->Name, CursorName) == 0)
{
return (MADB_Stmt *)LStmt->data;
}
}
MADB_SetError(&Stmt->Error, MADB_ERR_34000, NULL, 0);
return NULL;
}
/* }}} */
/* {{{ FetchMetadata */
MYSQL_RES* FetchMetadata(MADB_Stmt *Stmt)
{
ResetMetadata(&Stmt->metadata, mysql_stmt_result_metadata(Stmt->stmt));
return Stmt->metadata;
}
/* }}} */
/* {{{ MADB_StmtReset - reseting Stmt handler for new use. Has to be called inside a lock */
void MADB_StmtReset(MADB_Stmt *Stmt)
{
if (!QUERY_IS_MULTISTMT(Stmt->Query) || Stmt->MultiStmts == NULL)
{
if (Stmt->State > MADB_SS_PREPARED)
{
MDBUG_C_PRINT(Stmt->Connection, "mysql_stmt_free_result(%0x)", Stmt->stmt);
mysql_stmt_free_result(Stmt->stmt);
}
if (Stmt->State >= MADB_SS_PREPARED)
{
MDBUG_C_PRINT(Stmt->Connection, "-->closing %0x", Stmt->stmt);
MADB_STMT_CLOSE_STMT(Stmt);
Stmt->stmt= MADB_NewStmtHandle(Stmt);
MDBUG_C_PRINT(Stmt->Connection, "-->inited %0x", Stmt->stmt);
}
}
else
{
CloseMultiStatements(Stmt);
Stmt->stmt= MADB_NewStmtHandle(Stmt);
MDBUG_C_PRINT(Stmt->Connection, "-->inited %0x", Stmt->stmt);
}
switch (Stmt->State)
{
case MADB_SS_EXECUTED:
case MADB_SS_OUTPARAMSFETCHED:
MADB_FREE(Stmt->result);
MADB_FREE(Stmt->CharOffset);
MADB_FREE(Stmt->Lengths);
RESET_DAE_STATUS(Stmt);
case MADB_SS_PREPARED:
ResetMetadata(&Stmt->metadata, NULL);
Stmt->PositionedCursor= NULL;
Stmt->Ird->Header.Count= 0;
case MADB_SS_EMULATED:
/* We can have the case, then query did not succeed, and in case of direct execution we wouldn't
have ane state set, but some of stuff still needs to be cleaned. Perhaps we could introduce a state
for such case, smth like DIREXEC_PREPARED. Would be more proper, but yet overkill */
if (QUERY_IS_MULTISTMT(Stmt->Query))
{
while (mysql_more_results(Stmt->Connection->mariadb))
{
mysql_next_result(Stmt->Connection->mariadb);
}
}
default:
Stmt->PositionedCommand= 0;
Stmt->State= MADB_SS_INITED;
MADB_CLEAR_ERROR(&Stmt->Error);
}
}
/* }}} */
/* {{{ MADB_EDPrepare - Method called from SQLPrepare in case it is SQLExecDirect and if server >= 10.2
(i.e. we gonna do mariadb_stmt_exec_direct) */
SQLRETURN MADB_EDPrepare(MADB_Stmt *Stmt)
{
/* TODO: In case of positioned command it shouldn't be always*/
if ((Stmt->ParamCount= Stmt->Apd->Header.Count + (MADB_POSITIONED_COMMAND(Stmt) ? MADB_POS_COMM_IDX_FIELD_COUNT(Stmt) : 0)) != 0)
{
if (Stmt->params)
{
MADB_FREE(Stmt->params);
}
/* If we have "WHERE CURRENT OF", we will need bind additionaly parameters for each field in the index */
Stmt->params= (MYSQL_BIND *)MADB_CALLOC(sizeof(MYSQL_BIND) * Stmt->ParamCount);
}
return SQL_SUCCESS;
}
/* }}} */
/* {{{ MADB_RegularPrepare - Method called from SQLPrepare in case it is SQLExecDirect and if !(server > 10.2)
(i.e. we aren't going to do mariadb_stmt_exec_direct) */
SQLRETURN MADB_RegularPrepare(MADB_Stmt *Stmt)
{
LOCK_MARIADB(Stmt->Connection);
MDBUG_C_PRINT(Stmt->Connection, "mysql_stmt_prepare(%0x,%s)", Stmt->stmt, STMT_STRING(Stmt));
if (mysql_stmt_prepare(Stmt->stmt, STMT_STRING(Stmt), (unsigned long)strlen(STMT_STRING(Stmt))))
{
/* Need to save error first */
MADB_SetNativeError(&Stmt->Error, SQL_HANDLE_STMT, Stmt->stmt);
/* We need to close the stmt here, or it becomes unusable like in ODBC-21 */
MDBUG_C_PRINT(Stmt->Connection, "mysql_stmt_close(%0x)", Stmt->stmt);
MADB_STMT_CLOSE_STMT(Stmt);
Stmt->stmt= MADB_NewStmtHandle(Stmt);
UNLOCK_MARIADB(Stmt->Connection);
MDBUG_C_PRINT(Stmt->Connection, "mysql_stmt_init(%0x)->%0x", Stmt->Connection->mariadb, Stmt->stmt);
return Stmt->Error.ReturnValue;
}
UNLOCK_MARIADB(Stmt->Connection);
Stmt->State= MADB_SS_PREPARED;
/* If we have result returning query - fill descriptor records with metadata */
if (mysql_stmt_field_count(Stmt->stmt) > 0)
{
MADB_DescSetIrdMetadata(Stmt, mysql_fetch_fields(FetchMetadata(Stmt)), mysql_stmt_field_count(Stmt->stmt));
}
if ((Stmt->ParamCount= (SQLSMALLINT)mysql_stmt_param_count(Stmt->stmt)))
{
if (Stmt->params)
{
MADB_FREE(Stmt->params);
}
Stmt->params= (MYSQL_BIND *)MADB_CALLOC(sizeof(MYSQL_BIND) * Stmt->ParamCount);
}
return SQL_SUCCESS;
}
/* }}} */
/* {{{ MADB_StmtPrepare */
SQLRETURN MADB_StmtPrepare(MADB_Stmt *Stmt, char *StatementText, SQLINTEGER TextLength, BOOL ExecDirect)
{
char *CursorName= NULL;
unsigned int WhereOffset;
BOOL HasParameters= 0;
MDBUG_C_PRINT(Stmt->Connection, "%sMADB_StmtPrepare", "\t->");
LOCK_MARIADB(Stmt->Connection);
MADB_StmtReset(Stmt);
/* After this point we can't have SQL_NTS*/
ADJUST_LENGTH(StatementText, TextLength);
/* There is no need to send anything to the server to find out there is syntax error here */
if (TextLength < MADB_MIN_QUERY_LEN)
{
return MADB_SetError(&Stmt->Error, MADB_ERR_42000, NULL, 0);
}
MADB_ResetParser(Stmt, StatementText, TextLength);
MADB_ParseQuery(&Stmt->Query);
if ((Stmt->Query.QueryType == MADB_QUERY_INSERT || Stmt->Query.QueryType == MADB_QUERY_UPDATE || Stmt->Query.QueryType == MADB_QUERY_DELETE)
&& MADB_FindToken(&Stmt->Query, "RETURNING"))
{
Stmt->Query.ReturnsResult= '\1';
}
/* if we have multiple statements we save single statements in Stmt->StrMultiStmt
and store the number in Stmt->MultiStmts */
if (QueryIsPossiblyMultistmt(&Stmt->Query) && QUERY_IS_MULTISTMT(Stmt->Query) &&
(Stmt->Query.ReturnsResult || Stmt->Query.HasParameters) && Stmt->Query.BatchAllowed) /* If neither of statements returns result,
and does not have parameters, we will run them
using text protocol */
{
if (ExecDirect != FALSE)
{
return MADB_EDPrepare(Stmt);
}
/* We had error preparing any of statements */
else if (GetMultiStatements(Stmt, ExecDirect))
{
return Stmt->Error.ReturnValue;
}
/* all statemtens successfully prepared */
UNLOCK_MARIADB(Stmt->Connection);
return SQL_SUCCESS;
}
UNLOCK_MARIADB(Stmt->Connection);
if (!MADB_ValidateStmt(&Stmt->Query))
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY000, "SQL command SET NAMES is not allowed", 0);
return Stmt->Error.ReturnValue;
}
/* Transform WHERE CURRENT OF [cursorname]:
Append WHERE with Parameter Markers
In StmtExecute we will call SQLSetPos with update or delete:
*/
if ((CursorName = MADB_ParseCursorName(&Stmt->Query, &WhereOffset)))
{
MADB_DynString StmtStr;
char *TableName;
/* Make sure we have a delete or update statement
MADB_QUERY_DELETE and MADB_QUERY_UPDATE defined in the enum to have the same value
as SQL_UPDATE and SQL_DELETE, respectively */
if (Stmt->Query.QueryType == MADB_QUERY_DELETE || Stmt->Query.QueryType == MADB_QUERY_UPDATE)
{
Stmt->PositionedCommand= 1;
}
else
{
MADB_SetError(&Stmt->Error, MADB_ERR_42000, "Invalid SQL Syntax: DELETE or UPDATE expected for positioned update", 0);
return Stmt->Error.ReturnValue;
}
if (!(Stmt->PositionedCursor= MADB_FindCursor(Stmt, CursorName)))
return Stmt->Error.ReturnValue;
TableName= MADB_GetTableName(Stmt->PositionedCursor);
MADB_InitDynamicString(&StmtStr, "", 8192, 1024);
MADB_DynstrAppendMem(&StmtStr, Stmt->Query.RefinedText, WhereOffset);
MADB_DynStrGetWhere(Stmt->PositionedCursor, &StmtStr, TableName, TRUE);
MADB_RESET(STMT_STRING(Stmt), StmtStr.str);
/* Constructed query we've copied for execution has parameters */
Stmt->Query.HasParameters= 1;
MADB_DynstrFree(&StmtStr);
}
if (Stmt->Options.MaxRows)
{
/* TODO: LIMIT is not always the last clause. And not applicable to each query type.
Thus we need to check query type and last tokens, and possibly put limit before them */
char *p;
STMT_STRING(Stmt)= realloc((char *)STMT_STRING(Stmt), strlen(STMT_STRING(Stmt)) + 40);
p= STMT_STRING(Stmt) + strlen(STMT_STRING(Stmt));
_snprintf(p, 40, " LIMIT %zd", Stmt->Options.MaxRows);
}
if (!Stmt->Query.ReturnsResult && !Stmt->Query.HasParameters &&
/* If have multistatement query, and this is not allowed, we want to do normal prepare.
To give it last chance. And to return correct error otherwise */
! (QUERY_IS_MULTISTMT(Stmt->Query) && !Stmt->Query.BatchAllowed))
{
Stmt->State= MADB_SS_EMULATED;
return SQL_SUCCESS;
}
if (ExecDirect && MADB_CheckIfExecDirectPossible(Stmt))
{
return MADB_EDPrepare(Stmt);
}
else
{
return MADB_RegularPrepare(Stmt);
}
}
/* }}} */
/* {{{ MADB_StmtParamData */
SQLRETURN MADB_StmtParamData(MADB_Stmt *Stmt, SQLPOINTER *ValuePtrPtr)
{
MADB_Desc *Desc;
MADB_DescRecord *Record;
int ParamCount;
int i;
SQLRETURN ret;
if (Stmt->DataExecutionType == MADB_DAE_NORMAL)
{
if (!Stmt->Apd || !(ParamCount= Stmt->ParamCount))
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY010, NULL, 0);
return Stmt->Error.ReturnValue;
}
Desc= Stmt->Apd;
}
else
{
if (!Stmt->Ard || !(ParamCount= Stmt->DaeStmt->ParamCount))
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY010, NULL, 0);
return Stmt->Error.ReturnValue;
}
Desc= Stmt->DaeStmt->Apd;
}
/* If we have last DAE param(Stmt->PutParam), we are starting from the next one. Otherwise from first */
for (i= Stmt->PutParam > -1 ? Stmt->PutParam + 1 : 0; i < ParamCount; i++)
{
if ((Record= MADB_DescGetInternalRecord(Desc, i, MADB_DESC_READ)))
{
if (Record->OctetLengthPtr)
{
/* Stmt->DaeRowNumber is 1 based */
SQLLEN *OctetLength = (SQLLEN *)GetBindOffset(Desc, Record, Record->OctetLengthPtr, Stmt->DaeRowNumber > 1 ? Stmt->DaeRowNumber - 1 : 0, sizeof(SQLLEN));
if (PARAM_IS_DAE(OctetLength))
{
Stmt->PutDataRec= Record;
*ValuePtrPtr = GetBindOffset(Desc, Record, Record->DataPtr, Stmt->DaeRowNumber > 1 ? Stmt->DaeRowNumber - 1 : 0, Record->OctetLength);
Stmt->PutParam= i;
Stmt->Status= SQL_NEED_DATA;
return SQL_NEED_DATA;
}
}
}
}
/* reset status, otherwise SQLSetPos and SQLExecute will fail */
MARK_DAE_DONE(Stmt);
if (Stmt->DataExecutionType == MADB_DAE_ADD || Stmt->DataExecutionType == MADB_DAE_UPDATE)
{
MARK_DAE_DONE(Stmt->DaeStmt);
}
switch (Stmt->DataExecutionType) {
case MADB_DAE_NORMAL:
ret= Stmt->Methods->Execute(Stmt, FALSE);
RESET_DAE_STATUS(Stmt);
break;
case MADB_DAE_UPDATE:
ret= Stmt->Methods->SetPos(Stmt, Stmt->DaeRowNumber, SQL_UPDATE, SQL_LOCK_NO_CHANGE, 1);
RESET_DAE_STATUS(Stmt);
break;
case MADB_DAE_ADD:
ret= Stmt->DaeStmt->Methods->Execute(Stmt->DaeStmt, FALSE);
MADB_CopyError(&Stmt->Error, &Stmt->DaeStmt->Error);
RESET_DAE_STATUS(Stmt->DaeStmt);
break;
default:
ret= SQL_ERROR;
}
/* Interesting should we reset if execution failed? */
return ret;
}
/* }}} */
/* {{{ MADB_StmtPutData */
SQLRETURN MADB_StmtPutData(MADB_Stmt *Stmt, SQLPOINTER DataPtr, SQLLEN StrLen_or_Ind)
{
MADB_DescRecord *Record;
MADB_Stmt *MyStmt= Stmt;
SQLPOINTER ConvertedDataPtr= NULL;
SQLULEN Length= 0;
MADB_CLEAR_ERROR(&Stmt->Error);
if (DataPtr != NULL && StrLen_or_Ind < 0 && StrLen_or_Ind != SQL_NTS && StrLen_or_Ind != SQL_NULL_DATA)
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY090, NULL, 0);
return Stmt->Error.ReturnValue;
}
if (Stmt->DataExecutionType != MADB_DAE_NORMAL)
{
MyStmt= Stmt->DaeStmt;
}
Record= MADB_DescGetInternalRecord(MyStmt->Apd, Stmt->PutParam, MADB_DESC_READ);
assert(Record);
if (StrLen_or_Ind == SQL_NULL_DATA)
{
/* Check if we've already sent any data */
if (MyStmt->stmt->params[Stmt->PutParam].long_data_used)
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY011, NULL, 0);
return Stmt->Error.ReturnValue;
}
Record->Type= SQL_TYPE_NULL;
return SQL_SUCCESS;
}
/* This normally should be enforced by DM */
if (DataPtr == NULL && StrLen_or_Ind != 0)
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY009, NULL, 0);
return Stmt->Error.ReturnValue;
}
/*
if (StrLen_or_Ind == SQL_NTS)
{
if (Record->ConciseType == SQL_C_WCHAR)
StrLen_or_Ind= wcslen((SQLWCHAR *)DataPtr);
else
StrLen_or_Ind= strlen((char *)DataPtr);
}
*/
if (Record->ConciseType == SQL_C_WCHAR)
{
/* Conn cs */
ConvertedDataPtr= MADB_ConvertFromWChar((SQLWCHAR *)DataPtr, (SQLINTEGER)(StrLen_or_Ind/sizeof(SQLWCHAR)), &Length, &Stmt->Connection->Charset, NULL);
if ((ConvertedDataPtr == NULL || Length == 0) && StrLen_or_Ind > 0)
{
MADB_SetError(&Stmt->Error, MADB_ERR_HY001, NULL, 0);
return Stmt->Error.ReturnValue;
}
}
else
{
if (StrLen_or_Ind == SQL_NTS)
{
Length= strlen((char *)DataPtr);
}
else
{
Length= StrLen_or_Ind;
}
}
/* To make sure that we will not consume the doble amount of memory, we need to send
data via mysql_send_long_data directly to the server instead of allocating a separate
buffer. This means we need to process Update and Insert statements row by row. */
if (mysql_stmt_send_long_data(MyStmt->stmt, Stmt->PutParam, (ConvertedDataPtr ? (char *)ConvertedDataPtr : DataPtr), (unsigned long)Length))
{
MADB_SetNativeError(&Stmt->Error, SQL_HANDLE_STMT, MyStmt->stmt);
}
else
{
Record->InternalLength+= (unsigned long)Length;
}
MADB_FREE(ConvertedDataPtr);
return Stmt->Error.ReturnValue;
}
/* }}} */
/* {{{ MADB_ExecutePositionedUpdate */
SQLRETURN MADB_ExecutePositionedUpdate(MADB_Stmt *Stmt, BOOL ExecDirect)
{
SQLSMALLINT j;
SQLRETURN ret;
MADB_DynArray DynData;
MADB_Stmt *SaveCursor;
char *p;
MADB_CLEAR_ERROR(&Stmt->Error);
if (!Stmt->PositionedCursor->result)
{
MADB_SetError(&Stmt->Error, MADB_ERR_34000, "Cursor has no result set or is not open", 0);
return Stmt->Error.ReturnValue;
}
MADB_StmtDataSeek(Stmt->PositionedCursor, Stmt->PositionedCursor->Cursor.Position);
Stmt->Methods->RefreshRowPtrs(Stmt->PositionedCursor);
memcpy(&Stmt->Apd->Header, &Stmt->Ard->Header, sizeof(MADB_Header));
Stmt->AffectedRows= 0;
MADB_InitDynamicArray(&DynData, sizeof(char *), 8, 8);
for (j= 1; j < MADB_POS_COMM_IDX_FIELD_COUNT(Stmt) + 1; ++j)
{
SQLLEN Length;
MADB_DescRecord *Rec= MADB_DescGetInternalRecord(Stmt->PositionedCursor->Ard, j, MADB_DESC_READ);
Length= Rec->OctetLength;
/* if (Rec->inUse)
MA_SQLBindParameter(Stmt, j+1, SQL_PARAM_INPUT, Rec->ConciseType, Rec->Type, Rec->DisplaySize, Rec->Scale, Rec->DataPtr, Length, Rec->OctetLengthPtr);
else */
{
Stmt->Methods->GetData(Stmt->PositionedCursor, j, SQL_CHAR, NULL, 0, &Length, TRUE);
p= (char *)MADB_CALLOC(Length + 2);
MADB_InsertDynamic(&DynData, (char *)&p);
Stmt->Methods->GetData(Stmt->PositionedCursor, j, SQL_CHAR, p, Length + 1, NULL, TRUE);
Stmt->Methods->BindParam(Stmt, j + (Stmt->ParamCount - MADB_POS_COMM_IDX_FIELD_COUNT(Stmt)), SQL_PARAM_INPUT, SQL_CHAR, SQL_CHAR, 0, 0, p, Length, NULL);
}
}
SaveCursor= Stmt->PositionedCursor;
Stmt->PositionedCursor= NULL;
ret= Stmt->Methods->Execute(Stmt, ExecDirect);
Stmt->PositionedCursor= SaveCursor;
/* For the case of direct execution we need to restore number of parameters bound by application, for the case when application
re-uses handle with same parameters for another query. Otherwise we won't know that number (of application's parameters) */
if (ExecDirect)
{
Stmt->Apd->Header.Count-= MADB_POS_COMM_IDX_FIELD_COUNT(Stmt);
}
for (j=0; j < (int)DynData.elements; j++)
{
MADB_GetDynamic(&DynData, (char *)&p, j);
MADB_FREE(p);
}
MADB_DeleteDynamic(&DynData);
if (Stmt->PositionedCursor->Options.CursorType == SQL_CURSOR_DYNAMIC &&
(ret == SQL_SUCCESS || ret == SQL_SUCCESS_WITH_INFO))
{
SQLRETURN rc;
rc= Stmt->Methods->RefreshDynamicCursor(Stmt->PositionedCursor);
if (!SQL_SUCCEEDED(rc))
{
MADB_CopyError(&Stmt->Error, &Stmt->PositionedCursor->Error);
return Stmt->Error.ReturnValue;
}
if (Stmt->Query.QueryType == SQL_DELETE)
{
MADB_STMT_RESET_CURSOR(Stmt->PositionedCursor);
}
}
//MADB_FREE(DataPtr);
return ret;
}
/* }}} */
/* {{{ MADB_GetOutParams */
SQLRETURN MADB_GetOutParams(MADB_Stmt *Stmt, int CurrentOffset)
{
MYSQL_BIND *Bind;
unsigned int i=0, ParameterNr= 0;
/* Since Outparams are only one row, we use store result */
if (mysql_stmt_store_result(Stmt->stmt))
{
return MADB_SetNativeError(&Stmt->Error, SQL_HANDLE_STMT, Stmt);
}
Bind= (MYSQL_BIND *)MADB_CALLOC(sizeof(MYSQL_BIND) * mysql_stmt_field_count(Stmt->stmt));
for (i=0; i < (unsigned int)Stmt->ParamCount && ParameterNr < mysql_stmt_field_count(Stmt->stmt); i++)
{
MADB_DescRecord *IpdRecord, *ApdRecord;
if ((IpdRecord= MADB_DescGetInternalRecord(Stmt->Ipd, i, MADB_DESC_READ))!= NULL)
{
if (IpdRecord->ParameterType == SQL_PARAM_INPUT_OUTPUT ||
IpdRecord->ParameterType == SQL_PARAM_OUTPUT)
{
ApdRecord= MADB_DescGetInternalRecord(Stmt->Apd, i, MADB_DESC_READ);
Bind[ParameterNr].buffer= GetBindOffset(Stmt->Apd, ApdRecord, ApdRecord->DataPtr, CurrentOffset, ApdRecord->OctetLength);
if (ApdRecord->OctetLengthPtr)
{
Bind[ParameterNr].length= (unsigned long *)GetBindOffset(Stmt->Apd, ApdRecord, ApdRecord->OctetLengthPtr,
CurrentOffset, sizeof(SQLLEN));
}
Bind[ParameterNr].buffer_length= (unsigned long)ApdRecord->OctetLength;
Bind[ParameterNr].buffer_type= Stmt->stmt->params[i].buffer_type;
ParameterNr++;
}
}
}
mysql_stmt_bind_result(Stmt->stmt, Bind);
mysql_stmt_fetch(Stmt->stmt);
mysql_stmt_data_seek(Stmt->stmt, 0);
MADB_FREE(Bind);
return SQL_SUCCESS;
}
/* }}} */
/* {{{ ResetInternalLength */
static void ResetInternalLength(MADB_Stmt *Stmt, unsigned int ParamOffset)
{
unsigned int i;
MADB_DescRecord *ApdRecord;
for (i= ParamOffset; i < ParamOffset + Stmt->ParamCount; ++i)
{
if ((ApdRecord= MADB_DescGetInternalRecord(Stmt->Apd, i, MADB_DESC_READ)))
{
ApdRecord->InternalLength= 0;
}
}
}
/* }}} */
/* {{{ MADB_DoExecute */
/* Actually executing on the server, doing required actions with C API, and processing execution result */
SQLRETURN MADB_DoExecute(MADB_Stmt *Stmt, BOOL ExecDirect)
{
SQLRETURN ret= SQL_SUCCESS;
/**************************** mysql_stmt_bind_param **********************************/
if (ExecDirect)
{
mysql_stmt_attr_set(Stmt->stmt, STMT_ATTR_PREBIND_PARAMS, &Stmt->ParamCount);
}
mysql_stmt_attr_set(Stmt->stmt, STMT_ATTR_ARRAY_SIZE, (void*)&Stmt->Bulk.ArraySize);
if (Stmt->ParamCount)
{
mysql_stmt_bind_param(Stmt->stmt, Stmt->params);
}
ret= SQL_SUCCESS;
/**************************** mysql_stmt_execute *************************************/
MDBUG_C_PRINT(Stmt->Connection, ExecDirect ? "mariadb_stmt_execute_direct(%0x,%s)"
: "mariadb_stmt_execute(%0x)(%s)", Stmt->stmt, STMT_STRING(Stmt));
if ((ExecDirect && mariadb_stmt_execute_direct(Stmt->stmt, STMT_STRING(Stmt), strlen(STMT_STRING(Stmt))))
|| (!ExecDirect && mysql_stmt_execute(Stmt->stmt)))
{
ret= MADB_SetNativeError(&Stmt->Error, SQL_HANDLE_STMT, Stmt->stmt);
MDBUG_C_PRINT(Stmt->Connection, "mysql_stmt_execute:ERROR%s", "");
}
else
{
unsigned int ServerStatus;
Stmt->State= MADB_SS_EXECUTED;
mariadb_get_infov(Stmt->Connection->mariadb, MARIADB_CONNECTION_SERVER_STATUS, (void*)&ServerStatus);
if (ServerStatus & SERVER_PS_OUT_PARAMS)
{
Stmt->State= MADB_SS_OUTPARAMSFETCHED;
ret= Stmt->Methods->GetOutParams(Stmt, 0);
}