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Viewing changes to userdb/migrations/20080707-01.sql

  • Committer: William Grant
  • Date: 2009-03-17 07:16:03 UTC
  • Revision ID: grantw@unimelb.edu.au-20090317071603-ux5qxbjkpdarvig3
Tags: 0.1.9.10
ivle.interpret.execute_raw() no longer breaks with lots of data.

Previously we uses subprocess' wait(), which doesn't empty the stdout
pipe. It filled up, causing the child to block. We now use communicate()
instead, which select()s and reads the pipes to unblock things.

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Lines of Context:
userdb/migrations/20080707-01.sql
 
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BEGIN;
 
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CREATE TABLE subject (                                                               
 
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    subjectid       SERIAL PRIMARY KEY NOT NULL,
 
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    subj_code       VARCHAR UNIQUE NOT NULL,
 
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    subj_name       VARCHAR NOT NULL,
 
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    subj_short_name VARCHAR,    -- may be null
 
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    url             VARCHAR
 
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);
 
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DELETE FROM offering;
 
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ALTER TABLE offering DROP COLUMN subj_code;
 
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ALTER TABLE offering DROP COLUMN subj_name;
 
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ALTER TABLE offering DROP COLUMN url;
 
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ALTER TABLE offering ADD COLUMN subject INT4 REFERENCES subject (subjectid) NOT NULL;
 
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COMMIT;
 
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