SQLite C++获取表信息、获取列名、获取列类型

废话不说，直接上代码

struct table
{
string name;
string createSQL;
};

//获取表信息
void GetTables(vector<table>& vecTable)
{
char *szError= new char[256];
sqlite3_stmt *stmt = NULL;
sqlite3_prepare((sqlite3*)m_pDb,"select name,sql from sqlite_master where type='table' order by name",-1,&stmt,0);
vector<string> vecTables;
if(stmt)
{
while(sqlite3_step(stmt) == SQLITE_ROW)
{
table tb;
tb.name =(char *)sqlite3_column_text(stmt,0);
tb.createSQL = (char *)sqlite3_column_text(stmt,1);
vecTable.push_back(tb);
}
sqlite3_finalize(stmt);
stmt = NULL;
}
}

//获取列名
bool GetColName(vector<string>& vecColName, string strTableName)
{
sqlite3_stmt *stmt = NULL;
char sql[200];
sprintf(sql, "SELECT * FROM %s limit 0,1", strTableName.c_str());
char **pRes=NULL;
int nRow=0, nCol=0;
char *pErr=NULL;

//第一行是列名称
sqlite3_get_table((sqlite3*)m_pDb, sql, &pRes, &nRow, &nCol, &pErr);
for (int i=0; i<nRow; i++)
{
for (int j=0; j<nCol; j++)
{
char *pv = *(pRes+nCol*i+j);
vecColName.push_back(pv);
}
break;
}

if (pErr!=NULL)
{
sqlite3_free(pErr);
}
sqlite3_free_table(pRes);
return true;
}

//获取列类型
bool GetColType(vector<int>& vecType, string strTableName)
{
sqlite3_stmt *stmt = NULL;
char sql[200];
sprintf(sql, "SELECT * FROM %s limit 0,1", strTableName.c_str());
sqlite3_prepare((sqlite3*)m_pDb, sql,-1,&stmt,0);
if(stmt)
{
while(sqlite3_step(stmt) == SQLITE_ROW)
{
int nCount = sqlite3_column_count(stmt);
for (int i=0; i<nCount; i++)
{
int nValue = sqlite3_column_int(stmt,0);
int nType = sqlite3_column_type(stmt, i);
vecType.push_back(nType);
switch (nType)
{
case 1:
//SQLITE_INTEGER
break;
case 2:
//SQLITE_FLOAT
break;
case 3:
//SQLITE_TEXT
break;
case 4:
//SQLITE_BLOB
break;
case 5:
//SQLITE_NULL
break;
}
}
break;
}
sqlite3_finalize(stmt);
stmt = NULL;
}
return true;
}