177 lines
6.4 KiB
C
177 lines
6.4 KiB
C
/*
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测试null与''的适配
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test: 插入字段为''，查询where 字段 is null，能查到
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*/
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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 <sqltypes.h>
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#include <time.h>
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SQLHENV V_OD_Env; // Handle ODBC environment
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SQLHENV V_OD_hstmt;
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SQLRETURN rc;
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long V_OD_erg; // result of functions
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SQLHDBC V_OD_hdbc; // Handle connection
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char V_OD_stat[10]; // Status SQL
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SQLINTEGER V_OD_err,V_OD_id,V_ID;
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SQLLEN V_OD_rowanz;
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SQLSMALLINT V_OD_mlen,V_OD_colanz;
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char V_OD_msg[200],V_OD_buffer[200],schema[200],table[200],type[200],remark[200],V_OD_buffer1[200];
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SQLINTEGER maxlv,minlv;
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SQLINTEGER m_min,m_max;
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char *buf = "Mike";
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char *buf1 = "haha";
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int value = 3;
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int main(int argc,char *argv[])
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{
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/**
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ODBC handle
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1) SQL_HANDLE_ENV
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2) SQL_HANDLE_DBC
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3) SQL_HANDLE_STMT
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*/
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// 1. allocate Environment handle and register version
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V_OD_erg = SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE,&V_OD_Env);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error AllocHandle\n");
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return -1;
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}
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V_OD_erg = SQLSetEnvAttr(V_OD_Env, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error SetEnv\n");
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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// 2. allocate connection handle, set timeout
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V_OD_erg = SQLAllocHandle(SQL_HANDLE_DBC, V_OD_Env, &V_OD_hdbc);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error AllocHDB %d\n",V_OD_erg);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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// 3. Connect to the datasource "web"
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V_OD_erg = SQLConnect(V_OD_hdbc, (SQLCHAR*) "gaussdb", SQL_NTS,
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(SQLCHAR*) "", SQL_NTS,
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(SQLCHAR*) "", SQL_NTS);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error SQLConnect %d\n",V_OD_erg);
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SQLGetDiagRec(SQL_HANDLE_DBC, V_OD_hdbc,1,
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V_OD_stat, &V_OD_err,V_OD_msg,100,&V_OD_mlen);
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printf("%s (%d)\n",V_OD_msg,V_OD_err);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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printf("Connected !\n");
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//4. allocate statement handle.
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V_OD_erg=SQLAllocHandle(SQL_HANDLE_STMT, V_OD_hdbc, &V_OD_hstmt);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Fehler im AllocStatement %d\n",V_OD_erg);
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SQLGetDiagRec(SQL_HANDLE_DBC, V_OD_hdbc,1, V_OD_stat,&V_OD_err,V_OD_msg,100,&V_OD_mlen);
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printf("%s (%d)\n",V_OD_msg,V_OD_err);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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//SQLExecDirect
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V_OD_erg = SQLExecDirect(V_OD_hstmt,"drop table IF EXISTS adapt_null_01",SQL_NTS);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error in drop %d\n",V_OD_erg);
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SQLGetDiagRec(SQL_HANDLE_DBC, V_OD_hdbc,1, V_OD_stat,&V_OD_err,V_OD_msg,100,&V_OD_mlen);
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printf("%s (%d)\n",V_OD_msg,V_OD_err);
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SQLFreeHandle(SQL_HANDLE_STMT,V_OD_hstmt);
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SQLFreeHandle(SQL_HANDLE_DBC,V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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V_OD_erg = SQLExecDirect(V_OD_hstmt,"create table adapt_null_01(id int,name varchar(20),birthday date)",SQL_NTS);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error in create %d\n",V_OD_erg);
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SQLGetDiagRec(SQL_HANDLE_DBC, V_OD_hdbc,1, V_OD_stat,&V_OD_err,V_OD_msg,100,&V_OD_mlen);
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printf("%s (%d)\n",V_OD_msg,V_OD_err);
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SQLFreeHandle(SQL_HANDLE_STMT,V_OD_hstmt);
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SQLFreeHandle(SQL_HANDLE_DBC,V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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SQLExecDirect(V_OD_hstmt,"insert into adapt_null_01 values(1,'','1990-08-28')",SQL_NTS);
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SQLExecDirect(V_OD_hstmt,"insert into adapt_null_01 values(2,'ohw','2000-04-16')",SQL_NTS);
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SQLExecDirect(V_OD_hstmt,"insert into adapt_null_01 values(3,'mj','2001-05-24')",SQL_NTS);
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V_OD_erg = SQLExecDirect(V_OD_hstmt,"select id,name ,birthday from adapt_null_01 where name is null order by birthday",SQL_NTS);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Error in Select %d\n",V_OD_erg);
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SQLGetDiagRec(SQL_HANDLE_DBC, V_OD_hdbc,1, V_OD_stat,&V_OD_err,V_OD_msg,100,&V_OD_mlen);
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printf("%s (%d)\n",V_OD_msg,V_OD_err);
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SQLFreeHandle(SQL_HANDLE_STMT,V_OD_hstmt);
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SQLFreeHandle(SQL_HANDLE_DBC,V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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//SQLNumResultCols返回结果集中的列数
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V_OD_erg=SQLNumResultCols(V_OD_hstmt,&V_OD_colanz);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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SQLFreeHandle(SQL_HANDLE_STMT,V_OD_hstmt);
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SQLDisconnect(V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_DBC,V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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printf("SQLNumResultCols ---- Number of Columns %d\n",V_OD_colanz);
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//SQLRowCount 返回结果集中的行数
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V_OD_erg=SQLRowCount(V_OD_hstmt,&V_OD_rowanz);
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if ((V_OD_erg != SQL_SUCCESS) && (V_OD_erg != SQL_SUCCESS_WITH_INFO))
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{
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printf("Number of RowCount %d\n",V_OD_erg);
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SQLFreeHandle(SQL_HANDLE_STMT,V_OD_hstmt);
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SQLDisconnect(V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_DBC,V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return -1;
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}
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printf("SQLRowCount ----- Number of Rows %d\n",V_OD_rowanz);
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SQLBindCol(V_OD_hstmt,1,SQL_C_ULONG, &V_OD_id,150,&V_OD_rowanz);
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SQLBindCol(V_OD_hstmt,2,SQL_C_CHAR, &V_OD_buffer,150,&V_OD_rowanz);
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SQLBindCol(V_OD_hstmt,3,SQL_C_CHAR, &V_OD_buffer1,150,&V_OD_rowanz);
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//SQLFetch
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V_OD_erg=SQLFetch(V_OD_hstmt);
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while(V_OD_erg != SQL_NO_DATA)
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{
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printf("SQLBindCol ----- Result: %d %s %s\n",V_OD_id,V_OD_buffer,V_OD_buffer1);
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SQLGetData(V_OD_hstmt,2,SQL_C_ULONG,&V_ID,0,&V_OD_rowanz);
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printf("SQLGetData ----name = %s\n",V_OD_buffer);
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V_OD_erg=SQLFetch(V_OD_hstmt);
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};
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SQLFreeHandle(SQL_HANDLE_STMT,V_OD_hstmt);
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SQLDisconnect(V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_DBC,V_OD_hdbc);
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SQLFreeHandle(SQL_HANDLE_ENV, V_OD_Env);
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return(0);
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}
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