Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.3k views
in Technique[技术] by (71.8m points)

psycopg2 sql.SQL how to implement timestamp > now() - INTERVAL '8 days'?

Needed to select records newer, than 8 days from several tables

This is not working :(

    self._getRawData = sql.SQL("SELECT * FROM {} WRERE {} > NOW() - INTERVAL {}")
    ...
    cur = self._conn.cursor()
    cur.execute(self._getRawData.format(sql.Identifier('MyTS.MyTable'), 
                                        sql.Identifier('Timestamp'), 
                                        sql.Identifier('8 days')))

psycopg2.errors.SyntaxError: syntax error at or near ""Timestamp""

Below is working OK, but I want 2 implement sql.SQL for several tables - any advice?

    statement = "SELECT * FROM "MyTS"."MyTable" WHERE "Timestamp" > NOW() - INTERVAL                 '8 days'"
    cur = self._conn.cursor()
    cur.execute(statement)

UPD ! Solved! Thabks 4 the advice in comments!

    self._getRawData = sql.SQL("SELECT * FROM {}.{} WHERE {} > NOW() - INTERVAL {}")
    ...
    sql.Literal('8 days')))

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)
等待大神答复

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...