[英]Fetch DB tables blueprint like “describe table_name” commande from redshift and DB2 from python
我想使用我的python代碼來獲取數據,就像我們對describe [tableName] statement
所做的那樣。 我想在Redshift和DB2上做到這一點。
我嘗試使用Pandas和游標執行此操作,並嘗試了以下命令塊:
"set search_path to SCHEMA; select * from pg_table_def where schemaname = 'schema' and LOWER(tablename) = 'TableName';
describe schema.tableName
select column_name, data_type, character_manimum_length from information_schema.columns where table_schema = 'Schema' and table_name = 'TableName';
\\d or \\d+
。
import psycopg2
import numpy as np
import pandas as pd
con=psycopg2.connect(dbname= 'DBNAME', host="Host-Link",
port= '5439', user= 'username', password= 'password')
print(con)
cur = con.cursor()
query = "set search_path to Schema; select * from pg_table_def where schemaname = 'Schema' and LOWER(tablename) = 'TableName';"
cur.execute(query)
temp = cur.fetchall()
print(temp)
data_frame = pd.read_sql("set search_path to Schema; select * from pg_table_def where schemaname = 'Schema' and LOWER(tablename) = 'TableName';", con)
print(data_frame)
con.close()
我想要的輸出如下:
COLUMN_NAME DATA_TYPE PK NULLABLE DEFAULT AUTOINCREMENT COMPUTED REMARKS POSITION
col1 varchar(10) YES NO NO NO 1
col2 varchar(50) NO NO NO NO 2
col3 smallint NO NO NO NO 3
SVV_COLUMNS
系統視圖中包含許多此類數據。 您可以使用table_name
和table_schema
列查詢該表。
https://docs.aws.amazon.com/redshift/latest/dg/r_SVV_COLUMNS.html
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.