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DO NOT APPLY THIS MIGRATION WITHOUT READING THE FOLLOWING;
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-- This migration will delete all problem attempts and saves.
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-- The new database schema links attempts and saves to specific worksheets.
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-- Worksheets are linked to specific offerings.
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-- Problems are no longer referenced by and id number, instead they are
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-- referenced by an identifier TEXT field.
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-- This means that in order to save your current data, you must link its
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-- worksheet to an offering, and link the attempt to a problem identifier.
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-- TODO: Write a script to save the problem attempts somehow.
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-- Move the exercises from being stored as flat files, to being stored in
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-- Drop Old, Unused tables.
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DROP TABLE problem_attempt_breakdown;
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DROP TABLE problem_test_case_tag;
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DROP TABLE problem_tag;
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DROP TABLE problem_test_case;
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DROP TABLE problem_prerequisite;
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DROP TABLE problem_save;
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DROP TABLE problem_attempt;
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DROP TABLE worksheet_problem;
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CREATE TABLE problem (
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identifier TEXT PRIMARY KEY,
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CREATE TABLE worksheet (
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worksheetid SERIAL PRIMARY KEY,
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offeringid INT4 REFERENCES offering (offeringid) NOT NULL,
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identifier TEXT NOT NULL,
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assessable BOOLEAN NOT NULL,
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UNIQUE (offeringid, identifier)
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CREATE TABLE worksheet_problem (
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ws_prob_id SERIAL PRIMARY KEY,
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worksheetid INT4 REFERENCES worksheet (worksheetid) NOT NULL,
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problemid TEXT REFERENCES problem (identifier) NOT NULL,
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active BOOLEAN NOT NULL DEFAULT true,
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optional BOOLEAN NOT NULL,
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UNIQUE (worksheetid, problemid)
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CREATE TABLE problem_attempt (
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loginid INT4 REFERENCES login (loginid) NOT NULL,
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ws_prob_id INT4 REFERENCES worksheet_problem (ws_prob_id) NOT NULL,
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date TIMESTAMP NOT NULL,
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attempt TEXT NOT NULL,
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complete BOOLEAN NOT NULL,
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active BOOLEAN NOT NULL DEFAULT true,
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PRIMARY KEY (loginid, ws_prob_id, date)
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CREATE TABLE problem_save (
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loginid INT4 REFERENCES login (loginid) NOT NULL,
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ws_prob_id INT4 REFERENCES worksheet_problem (ws_prob_id) NOT NULL,
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date TIMESTAMP NOT NULL,
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PRIMARY KEY (loginid, ws_prob_id)
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CREATE TABLE test_suite (
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suiteid SERIAL PRIMARY KEY,
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problemid TEXT REFERENCES problem (identifier) NOT NULL,
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CREATE TABLE test_case (
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testid SERIAL PRIMARY KEY,
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suiteid INT4 REFERENCES test_suite (suiteid) NOT NULL,
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CREATE TABLE suite_variables (
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varid SERIAL PRIMARY KEY,
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suiteid INT4 REFERENCES test_suite (suiteid) NOT NULL,
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var_type TEXT NOT NULL,
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CREATE TABLE test_case_parts (
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partid SERIAL PRIMARY KEY,
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testid INT4 REFERENCES test_case (testid) NOT NULL,
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part_type TEXT NOT NULL,