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August 26, 2021 05:51
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postgre sql helper #database #postgresql
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import pg | |
class Greenplummanager(): | |
def __init__(self,host,port,dbname,user,pwd): | |
self._host = host | |
self._port = port | |
self._dbname = dbname | |
self._user = user | |
self._pwd = pwd | |
def connectGreenPlum(self): | |
isconnect = False | |
try: | |
# pg.connect() | |
self.pgdb_conn = pg.connect(dbname = self._dbname, host = self._host, port = self._port, user = self._user, passwd = self._pwd) | |
# pgdb_conn = pg.connect("host=192.168.103.31 port=5432 dbname=tpc user=gpadmin") | |
isconnect = True | |
except Exception as e: | |
print(e.args[0]) | |
return isconnect | |
def closeConnection(self): | |
self.pgdb_conn.close() | |
def queryDataBySQL(self,querysql): | |
result = None | |
try: | |
result = self.pgdb_conn.query(querysql) | |
except Exception as e: | |
print('query record failed') | |
print('query record failed, %s, %s' %(e.args[0],e.message)) | |
result = None | |
return result | |
#insert data INSERT INTO tbl_product3(sv_productname) values('apple') | |
def insertDataBySQL(self,insertsql): | |
print(insertsql) | |
isresult = True | |
try: | |
self.pgdb_conn.query(insertsql) | |
except Exception as e: | |
print('insert record into table failed') | |
print('insert record failed, %s, %s' %(e.args[0],e.message)) | |
isresult = False | |
return isresult | |
def deleteDataBySQL(self,deletesql): | |
isresult = True | |
try: | |
self.pgdb_conn.query(deletesql) | |
except Exception as e: | |
print('delete record failed') | |
print('delete record failed, %s, %s' %(e.args[0],e.message)) | |
isresult = False | |
return isresult | |
def insertBlobData(self,insertsql,imgdata): | |
isresult = True | |
try: | |
print(type(imgdata)) | |
self.pgdb_conn.query(insertsql % pg.escape_bytea(imgdata)) | |
except Exception as e: | |
print('insert blob failed') | |
print('insert blob failed, %s, %s' %(e.args[0],e.message)) | |
isresult = False | |
return isresult | |
def insertImg(self, path): | |
img_file = open(path) | |
print(type(img_file.read())) | |
self.pgdb_conn.query("insert into gtab_img values('1','%s')" % pg.escape_bytea(img_file.read())) | |
img_file.close() | |
def readImg(self, id): | |
result = self.pgdb_conn.query("select bindata from gtab_img where id = '%s'" % id) | |
img = result.dictresult()[0]['bindata'] | |
file = open('text.jpg','wb') | |
file.write(img) | |
file.close() |
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