650 lines
19 KiB
C
650 lines
19 KiB
C
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#include <stdio.h>
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#include <sql.h>
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#include <sqlext.h>
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#include <stdarg.h>
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#include "database.h"
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#include "cjson/cJSON.h"
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#define DB_ROWS 20
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#define DB_COLUMN 1
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#define DB_STATUS_LEN 6
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#define DB_ROWS_MAX_LEN 50
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typedef struct column_info
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{
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char name[30];
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SQLSMALLINT nameLength;
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SQLSMALLINT dateType;
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SQLULEN columnSize;
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SQLSMALLINT decimalDigits;
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SQLSMALLINT nullable;
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}COLUMN_INFO_T;
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/*********************************************************************************
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* Description：
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* 打印异常信息
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* Input:
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* hEnv - 环境变量
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* hDbc - 连接句柄
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* hStmt - 新分配的数据结构的句柄缓冲区的指针
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* Output:
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* 无
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* Return:
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* 无
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* Others:
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* 无
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**********************************************************************************/
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static void DumpODBCLog(SQLHENV hEnv, SQLHDBC hDbc, SQLHSTMT hStmt)
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{
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SQLTCHAR szError[501];
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SQLTCHAR szSqlState[10];
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SQLINTEGER nNativeError;
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SQLSMALLINT nErrorMsg;
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if (hStmt != NULL)
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{
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while ( SQLError( hEnv, hDbc, hStmt, szSqlState, &nNativeError, szError, 500, &nErrorMsg ) == SQL_SUCCESS )
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{
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printf( "%s\n", szError);
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}
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}
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if (hDbc != NULL)
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{
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while ( SQLError( hEnv, hDbc, 0, szSqlState, &nNativeError, szError, 500, &nErrorMsg ) == SQL_SUCCESS )
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{
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printf( "%s\n", szError);
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}
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}
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if (hEnv != NULL)
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{
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while ( SQLError( hEnv, 0, 0, szSqlState, &nNativeError, szError, 500, &nErrorMsg ) == SQL_SUCCESS )
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{
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printf( "%s\n", szError);
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}
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}
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return;
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}
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/*********************************************************************************
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* Description：
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* 连接数据库操作
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* Input:
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* module_id - 模块ID，每个模块需要向数据库模块设置模块ID，用于打印、统计使用
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* Output:
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* 无
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* Return:
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* 数据库句柄
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* NULL - 连接数据库失败
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* 非NULL - 连接数据库成功
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* Others:
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* 无
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**********************************************************************************/
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void * connect_database (int module_id)
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{
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SQLHENV henv = NULL;
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SQLHDBC hdbc = NULL;
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SQLRETURN ret;
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SQLAllocHandle( SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
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SQLSetEnvAttr( henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER)SQL_OV_ODBC3, 0 );
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SQLAllocHandle( SQL_HANDLE_DBC, henv, &hdbc );
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SQLSetConnectAttr( hdbc, SQL_ATTR_ODBC_CURSORS, (SQLPOINTER)SQL_CUR_USE_ODBC, 0 );
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ret = SQLConnect( hdbc, "meng", SQL_NTS, "", SQL_NTS, "", SQL_NTS );
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DumpODBCLog(NULL, hdbc, NULL);
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if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO)
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{
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return NULL;
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}
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return hdbc;
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}
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/*********************************************************************************
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* Description：
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* 释放数据库连接
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* Input:
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* module_id - 模块ID，每个模块需要向数据库模块设置模块ID，用于打印、统计使用
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* db_handle - 数据库句柄
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* Output:
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* 无
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* Return:
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* DB_RET_PARAM_NULL - 入参指针为NULL
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* DB_RET_ERR - 释放失败
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* DB_RET_OK - 释放成功
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* Others:
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* 无
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**********************************************************************************/
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int disconnect_database (int module_id, void * db_handle)
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{
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SQLRETURN ret;
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if (NULL == db_handle)
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{
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return DB_RET_PARAM_NULL;
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}
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SQLDisconnect(db_handle);
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ret = SQLFreeHandle(SQL_HANDLE_DBC, db_handle);
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if (ret != SQL_SUCCESS)
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{
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return DB_RET_ERR;
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}
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return DB_RET_OK;
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}
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/*********************************************************************************
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* Description：
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* 创建数据库表
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* Input:
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* module_id - 模块ID，每个模块需要向数据库模块设置模块ID，用于打印、统计使用
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* db_handle - 数据库句柄
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* table_name - 创建的表名
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* sql_str - 创建表的SQL语句
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* Output:
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* 无
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* Return:
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* DB_RET_PARAM_NULL - 入参指针为NULL
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* DB_RET_PARAM_NULL - 入参指针为NULL
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* DB_RET_ERR - 释放失败
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* DB_RET_OK - 释放成功
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* Others:
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* 无
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**********************************************************************************/
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int create_database_table(int module_id, void * db_handle, char * table_name, char * sql_str)
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{
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SQLRETURN ret;
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SQLHSTMT hstmt;
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if ((NULL == db_handle) || (NULL == table_name) || (NULL == sql_str))
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{
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return DB_RET_PARAM_NULL;
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}
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ret = SQLAllocHandle( SQL_HANDLE_STMT, db_handle, &hstmt);
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if ((SQL_INVALID_HANDLE == ret) || (SQL_ERROR == ret))
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{
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return DB_RET_ERR;
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}
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ret = SQLExecDirect(hstmt, sql_str, SQL_NTS);
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SQLCloseCursor(hstmt);
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SQLFreeStmt(hstmt, SQL_DROP);
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if (ret != SQL_SUCCESS)
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{
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return DB_RET_ERR;
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}
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return DB_RET_OK;
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}
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/*********************************************************************************
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* Description：
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* 对据库表执行插入、删除、更新操作
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* Input:
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* module_id - 模块ID，每个模块需要向数据库模块设置模块ID，用于打印、统计使用
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* db_handle - 数据库句柄
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* op_type - 操作类型 DB_OP_INSERT：插入数据 DB_OP_DEL：删除数据 DB_OP_UPDATE：更新数据
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* table_name - 创建的表名
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* sql_str - 创建表的SQL语句
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* param_num - 扩展参数组合数量，填写0表示没有，需要防止SQL注入问题，需要使用扩展参数组合
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* Output:
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* 无
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* Return:
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* DB_RET_PARAM_NULL - 入参指针为NULL
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* DB_RET_ERR - 操作失败
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* DB_RET_OK - 操作成功
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* Others:
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* 无
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**********************************************************************************/
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int update_database(int module_id, void * db_handle, int op_type, char * table_name, char * sql_str, int param_num, ...)
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{
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SQLRETURN ret;
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SQLHSTMT hstmt;
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SQLUSMALLINT RowStatusArray[DB_ROWS];
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if ((NULL == db_handle) || (NULL == table_name) || (NULL == sql_str))
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{
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return DB_RET_PARAM_NULL;
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}
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if ((op_type != DB_OP_INSERT) && (op_type != DB_OP_DEL) && (op_type != DB_OP_UPDATE))
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{
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return DB_RET_PARAM_ERR;
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}
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SQLAllocHandle(SQL_HANDLE_STMT, db_handle, &hstmt);
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if ((SQL_INVALID_HANDLE == ret) || (SQL_ERROR == ret))
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{
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return DB_RET_ERR;
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}
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SQLSetStmtAttr(hstmt, SQL_ATTR_CONCURRENCY, (SQLPOINTER)SQL_CONCUR_VALUES, 0);
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SQLSetStmtAttr(hstmt, SQL_ATTR_CURSOR_TYPE, (SQLPOINTER)SQL_CURSOR_STATIC, 0);
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SQLSetStmtAttr(hstmt, SQL_ATTR_ROW_ARRAY_SIZE, (SQLPOINTER)DB_COLUMN, 20 );
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SQLSetStmtAttr(hstmt, SQL_ATTR_ROW_STATUS_PTR, RowStatusArray, 0);
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SQLSetCursorName(hstmt, "ORDERCURSOR", SQL_NTS );
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/* 是否存在扩展参数，会采用不同的处理流程 */
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if (0 == param_num)
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{
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ret = SQLExecDirect(hstmt, sql_str, SQL_NTS);
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}
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else
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{
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int i;
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int type;
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int len;
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SQLLEN ind_name = SQL_NTS;
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long long int_temp;
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va_list ap;
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double double_temp;
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SQLPrepare(hstmt, sql_str, SQL_NTS);
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va_start(ap, param_num);
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/* 执行参数绑定操作 */
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for (i = 1; i <= param_num; i++)
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{
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type = va_arg(ap, int);
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len = va_arg(ap, int);
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if (DB_DATA_INT_TYPE == type)
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{
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int_temp = va_arg(ap, long long);
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ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_UBIGINT, SQL_C_UBIGINT, len, 0, &int_temp, len, &ind_name);
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}
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else if (DB_DATA_STRING_TYPE == type)
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{
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ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR , len, 0, va_arg(ap, char *), len, &ind_name);
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}
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else if (DB_DATA_FLOAT_TYPE == type)
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{
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double_temp = va_arg(ap, double);
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ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_DOUBLE, len, 0, &double_temp, len, &ind_name);
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}
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else
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{
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printf("\n type error : %d", type);
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}
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}
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va_end(ap);
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ret = SQLExecute(hstmt);
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}
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SQLCloseCursor(hstmt);
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SQLFreeStmt(hstmt, SQL_DROP);
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if (ret != SQL_SUCCESS)
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{
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DumpODBCLog(NULL, db_handle, hstmt);
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return DB_RET_ERR;
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}
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return DB_RET_OK;
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}
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/*********************************************************************************
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* Description：
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* 根据指定信息查找数据库
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* Input:
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* module_id - 模块ID，每个模块需要向数据库模块设置模块ID，用于打印、统计使用
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* db_handle - 数据库句柄
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* table_name - 创建的表名
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* sql_str - 创建表的SQL语句
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* begin_num - 从第几条查询结果开始返回
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* need_num - 应用需要返回的结果条数
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* param_num - 扩展参数组合数量，填写0表示没有，需要防止SQL注入问题，需要使用扩展参数组合
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* Output:
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* return_num - 实际返回的结果条数
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* Return:
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* NULL - 操作失败
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* 非NULL - 返回CJSON格式的查询结果
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* Others:
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* 无
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**********************************************************************************/
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void * select_datebase_by_number(int module_id, void * db_handle, char * table_name, char * sql_str, int begin_num, int need_num, int * return_num, int param_num, ...)
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{
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SQLRETURN ret;
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SQLHSTMT hstmt;
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SQLUSMALLINT RowStatusArray[DB_ROWS];
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SQLSMALLINT nameLength = 0;
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SQLSMALLINT dateType = 0;
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SQLULEN columnSize = 0;
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SQLSMALLINT decimalDigits = 0;
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SQLSMALLINT nullable = 0;
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SQLRETURN retcode = 0;
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int i = 0;
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int j = 0;
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COLUMN_INFO_T db_column_info[20];
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int column_nmuber = 0;
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SQLCHAR value[DB_ROWS][DB_COLUMN][DB_ROWS_MAX_LEN];
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int ret_num = 0;
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SQLUINTEGER FetchOrientation;
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SQLLEN cbValue[DB_ROWS][DB_ROWS_MAX_LEN];
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cJSON *json = cJSON_CreateObject();
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char *json_data = NULL;
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cJSON *array = NULL;
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cJSON * obj = NULL;
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if ((NULL == db_handle) || (NULL == table_name) || (NULL == sql_str))
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{
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return NULL;
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}
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if ((begin_num <= 0) || (need_num <= 0))
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{
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return NULL;
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}
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ret = SQLAllocHandle( SQL_HANDLE_STMT, db_handle, &hstmt);
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if ((SQL_INVALID_HANDLE == ret) || (SQL_ERROR == ret))
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{
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return NULL;
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}
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SQLSetStmtAttr( hstmt, SQL_ATTR_CONCURRENCY, (SQLPOINTER)SQL_CONCUR_VALUES, 0 );
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SQLSetStmtAttr( hstmt, SQL_ATTR_CURSOR_TYPE, (SQLPOINTER)SQL_CURSOR_STATIC, 0 );
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SQLSetStmtAttr( hstmt, SQL_ATTR_ROW_ARRAY_SIZE, (SQLPOINTER)DB_COLUMN, 20 );
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SQLSetStmtAttr( hstmt, SQL_ATTR_ROW_STATUS_PTR, RowStatusArray, 0 );
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SQLSetCursorName( hstmt, "ORDERCURSOR", SQL_NTS );
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SQLPrepare( hstmt, sql_str, SQL_NTS );
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column_nmuber = 1;
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/* 解析查询结果中包含的列信息 */
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do
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{
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retcode = SQLDescribeCol(hstmt, column_nmuber, db_column_info[column_nmuber].name, sizeof(db_column_info[column_nmuber].name), &db_column_info[column_nmuber].nameLength,
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&db_column_info[column_nmuber].dateType, &db_column_info[column_nmuber].columnSize,
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&db_column_info[column_nmuber].decimalDigits, &db_column_info[column_nmuber].nullable);
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if (retcode != SQL_SUCCESS)
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{
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column_nmuber--;
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break;
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}
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column_nmuber++;
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}while(1);
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/* 如果列为0，返回查询结果 */
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if (0 == column_nmuber)
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{
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SQLCloseCursor(hstmt);
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SQLFreeStmt(hstmt, SQL_DROP);
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return NULL;
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}
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/* 是否存在扩展参数，会采用不同的处理流程 */
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if (0 == param_num)
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{
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ret = SQLExecDirect(hstmt, sql_str, SQL_NTS);
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}
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else
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{
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int i;
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int type;
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int len;
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SQLLEN ind_name = SQL_NTS;
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long long int_temp;
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va_list ap;
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double double_temp;
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SQLPrepare(hstmt, sql_str, SQL_NTS);
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va_start(ap, param_num);
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for (i = 1; i <= param_num; i++)
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{
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type = va_arg(ap, int);
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len = va_arg(ap, int);
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if (DB_DATA_INT_TYPE == type)
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{
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int_temp = va_arg(ap, long long);
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ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_UBIGINT, SQL_C_UBIGINT, len, 0, &int_temp, len, &ind_name);
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}
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else if (DB_DATA_STRING_TYPE == type)
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{
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ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR , len, 0, va_arg(ap, char*), len, &ind_name);
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}
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else if (DB_DATA_FLOAT_TYPE == type)
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{
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double_temp = va_arg(ap, double);
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ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_DOUBLE, len, 0, &double_temp, len, &ind_name);
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}
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else
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{
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}
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}
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va_end(ap);
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ret = SQLExecute(hstmt);
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}
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if (ret != SQL_SUCCESS)
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{
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SQLCloseCursor(hstmt);
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SQLFreeStmt(hstmt, SQL_DROP);
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return NULL;
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}
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/* 将应用程序数据缓冲区绑定到结果集中的列 */
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for (i = 1; i <= column_nmuber; i++)
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{
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if (SQL_BIGINT == db_column_info[i].dateType)
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{
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SQLBindCol(hstmt, i, SQL_C_UBIGINT, value[i][0], DB_ROWS_MAX_LEN, cbValue[i]);
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}
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else if (SQL_CHAR == db_column_info[i].dateType)
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{
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SQLBindCol(hstmt, i, db_column_info[i].dateType, value[i][0], DB_ROWS_MAX_LEN, cbValue[i]);
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}
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else if (SQL_DOUBLE == db_column_info[i].dateType)
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{
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SQLBindCol(hstmt, i, db_column_info[i].dateType, value[i][0], 0, cbValue[i]);
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}
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else
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{
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}
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}
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cJSON_AddItemToObject(json, "data", array = cJSON_CreateArray());
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/* 查询结果 */
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FetchOrientation = SQL_FETCH_RELATIVE;
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for (i = 1; i <= need_num; i++)
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{
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ret = SQLFetchScroll(hstmt, FetchOrientation, begin_num);
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FetchOrientation = SQL_FETCH_NEXT;
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if (ret != SQL_SUCCESS)
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{
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break;
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}
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ret_num++;
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cJSON_AddItemToArray(array, obj = cJSON_CreateObject());
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for (j = 1; j <= column_nmuber; j++)
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{
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printf("\n db_column_info[j].dateType: %d j : %d", db_column_info[j].dateType, j);
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if (SQL_BIGINT == db_column_info[j].dateType)
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{
|
||
cJSON_AddNumberToObject(obj, db_column_info[j].name, *((long long *)&(value[j][0])));
|
||
}
|
||
else if (SQL_CHAR == db_column_info[j].dateType)
|
||
{
|
||
cJSON_AddStringToObject(obj, db_column_info[j].name , value[j][0]);
|
||
}
|
||
else if (SQL_DOUBLE == db_column_info[j].dateType)
|
||
{
|
||
cJSON_AddNumberToObject(obj, db_column_info[j].name , *((double *)&(value[j][0])));
|
||
}
|
||
else
|
||
{
|
||
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
SQLCloseCursor(hstmt);
|
||
SQLFreeStmt(hstmt, SQL_DROP);
|
||
|
||
*return_num = ret_num;
|
||
|
||
if (ret_num != 0)
|
||
{
|
||
json_data = cJSON_Print(json);
|
||
}
|
||
|
||
return json_data;
|
||
}
|
||
|
||
/*********************************************************************************
|
||
* Description：
|
||
* 返回根据指定信息查找数据库的结果的条目数
|
||
* Input:
|
||
* module_id - 模块ID，每个模块需要向数据库模块设置模块ID，用于打印、统计使用
|
||
* db_handle - 数据库句柄
|
||
* table_name - 创建的表名
|
||
* sql_str - 创建表的SQL语句
|
||
* param_num - 扩展参数组合数量，填写0表示没有，需要防止SQL注入问题，需要使用扩展参数组合
|
||
* Output:
|
||
* ret_num - 实际返回的结果条数
|
||
* Return:
|
||
* DB_RET_PARAM_NULL - 入参指针为NULL
|
||
* DB_RET_ERR - 操作失败
|
||
* DB_RET_OK - 操作成功
|
||
* Others:
|
||
* 无
|
||
**********************************************************************************/
|
||
int get_select_datebase_number(int module_id, void * db_handle, char * table_name, char * sql_str, int * ret_num, int param_num, ...)
|
||
{
|
||
SQLRETURN ret;
|
||
SQLHSTMT hstmt;
|
||
SQLUSMALLINT RowStatusArray[DB_ROWS];
|
||
SQLSMALLINT nameLength = 0;
|
||
SQLSMALLINT dateType = 0;
|
||
SQLULEN columnSize = 0;
|
||
SQLSMALLINT decimalDigits = 0;
|
||
SQLSMALLINT nullable = 0;
|
||
SQLRETURN retcode = 0;
|
||
int i = 0;
|
||
int j = 0;
|
||
COLUMN_INFO_T db_column_info[20];
|
||
int column_nmuber = 0;
|
||
SQLCHAR value[DB_ROWS][DB_COLUMN][DB_ROWS_MAX_LEN];
|
||
int returnNum = 0;
|
||
SQLUINTEGER FetchOrientation;
|
||
SQLLEN cbValue[DB_ROWS_MAX_LEN][DB_ROWS];
|
||
SQLLEN count;
|
||
|
||
if ((NULL == db_handle) || (NULL == table_name) || (NULL == sql_str))
|
||
{
|
||
return DB_RET_PARAM_NULL;
|
||
}
|
||
|
||
ret = SQLAllocHandle( SQL_HANDLE_STMT, db_handle, &hstmt);
|
||
if ((SQL_INVALID_HANDLE == ret) || (SQL_ERROR == ret))
|
||
{
|
||
return DB_RET_ERR;
|
||
}
|
||
|
||
SQLSetStmtAttr( hstmt, SQL_ATTR_CONCURRENCY, (SQLPOINTER)SQL_CONCUR_VALUES, 0 );
|
||
SQLSetStmtAttr( hstmt, SQL_ATTR_CURSOR_TYPE, (SQLPOINTER)SQL_CURSOR_STATIC, 0 );
|
||
SQLSetStmtAttr( hstmt, SQL_ATTR_ROW_ARRAY_SIZE, (SQLPOINTER)DB_COLUMN, 20 );
|
||
SQLSetStmtAttr( hstmt, SQL_ATTR_ROW_STATUS_PTR, RowStatusArray, 0 );
|
||
SQLSetCursorName( hstmt, "ORDERCURSOR", SQL_NTS );
|
||
|
||
SQLPrepare( hstmt, sql_str, SQL_NTS );
|
||
|
||
if (0 == param_num)
|
||
{
|
||
ret = SQLExecDirect(hstmt, sql_str, SQL_NTS);
|
||
}
|
||
else
|
||
{
|
||
int i;
|
||
int type;
|
||
int len;
|
||
SQLLEN ind_name = SQL_NTS;
|
||
long long int_temp;
|
||
va_list ap;
|
||
double double_temp;
|
||
|
||
SQLPrepare(hstmt, sql_str, SQL_NTS);
|
||
|
||
va_start(ap, param_num);
|
||
|
||
for (i = 1; i <= param_num; i++)
|
||
{
|
||
type = va_arg(ap, int);
|
||
len = va_arg(ap, int);
|
||
|
||
if (DB_DATA_INT_TYPE == type)
|
||
{
|
||
int_temp = va_arg(ap, long long);
|
||
ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_UBIGINT, SQL_C_UBIGINT, len, 0, &int_temp, len, &ind_name);
|
||
}
|
||
else if (DB_DATA_STRING_TYPE == type)
|
||
{
|
||
ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR , len, 0, va_arg(ap, char*), len, &ind_name);
|
||
}
|
||
else if (DB_DATA_FLOAT_TYPE == type)
|
||
{
|
||
double_temp = va_arg(ap, double);
|
||
ret = SQLBindParameter(hstmt, i, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_DOUBLE, len, 0, &double_temp, len, &ind_name);
|
||
}
|
||
else
|
||
{
|
||
|
||
}
|
||
}
|
||
|
||
ret = SQLExecute(hstmt);
|
||
}
|
||
|
||
if (ret != SQL_SUCCESS)
|
||
{
|
||
SQLCloseCursor(hstmt);
|
||
SQLFreeStmt(hstmt, SQL_DROP);
|
||
return DB_RET_ERR;
|
||
}
|
||
|
||
SQLRowCount( hstmt, &count);
|
||
|
||
*ret_num = count;
|
||
|
||
SQLCloseCursor(hstmt);
|
||
SQLFreeStmt(hstmt, SQL_DROP);
|
||
|
||
return DB_RET_OK;
|
||
}
|