Update to function templates

[samir-puranik]

• Updated template files ensuring
  • add PgAdmin License header
  • change data.func_without_args to data.func_args
  • macros are being pathed to properly
• Using .server instead of ._server outside of NodeObject class
• Added conn to FunctionBase query_data methods

[DaeunYim]

functions as well as Indexes and constraints all look good. Really nicely done!

Teseted on pg 11-15

CREATE TABLE students (
    student_id SERIAL PRIMARY KEY,
    first_name VARCHAR(100) NOT NULL,
    last_name VARCHAR(100) NOT NULL,
    email VARCHAR(100) UNIQUE NOT NULL,
    age INT CHECK (age >= 0 AND age <= 120),
    enrollment_date DATE DEFAULT CURRENT_DATE,
    graduation_date DATE CHECK (graduation_date >= enrollment_date OR graduation_date IS NULL)
);

CREATE RULE prevent_student_delete AS
ON DELETE TO students
DO INSTEAD NOTHING;

CREATE TABLE student_log (
    log_id SERIAL PRIMARY KEY,
    student_id INT,
    action VARCHAR(100),
    log_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE OR REPLACE FUNCTION log_student_insert()
RETURNS TRIGGER AS $$
BEGIN
    INSERT INTO student_log (student_id, action) 
    VALUES (NEW.student_id, 'INSERTED');
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER trigger_log_student_insert
AFTER INSERT ON students
FOR EACH ROW
EXECUTE FUNCTION log_student_insert();


CREATE INDEX idx_students_last_name ON students (last_name);
CREATE INDEX idx_students_first_last_name ON students (first_name, last_name);
CREATE INDEX idx_students_adults ON students (student_id) WHERE age >= 18;
ALTER TABLE students ADD COLUMN courses INT[];
CREATE INDEX idx_students_courses ON students USING gin(courses);
-- Assuming you have a table with geometric points representing locations
CREATE INDEX idx_students_email_hash ON students USING hash(email);
CREATE INDEX idx_students_enrollment_date_brin ON students USING brin(enrollment_date);



CREATE OR REPLACE FUNCTION avg_student_age() 
RETURNS FLOAT AS $$
DECLARE
    average_age FLOAT;
BEGIN
    SELECT AVG(age) INTO average_age FROM students;
    RETURN average_age;
END;
$$ LANGUAGE plpgsql;


CREATE OR REPLACE FUNCTION duration_enroll_to_grad(student_id INT) 
RETURNS INT AS $$
DECLARE
    days_duration INT;
BEGIN
    SELECT EXTRACT(DAY FROM (graduation_date - enrollment_date)) 
    INTO days_duration 
    FROM students 
    WHERE student_id = $1;
    
    RETURN days_duration;
END;
$$ LANGUAGE plpgsql;


CREATE OR REPLACE PROCEDURE enroll_multiple_students(students_data JSONB[])
LANGUAGE plpgsql AS $$
DECLARE
    student_record JSONB;
BEGIN
    FOR i IN 1..array_length(students_data, 1) LOOP
        student_record := students_data[i];
        INSERT INTO students (first_name, last_name, email, age) 
        VALUES (student_record ->> 'first_name', student_record ->> 'last_name', student_record ->> 'email', (student_record ->> 'age')::INT);
    END LOOP;
    COMMIT;
END;
$$;

[DaeunYim]

One minor issue for the last PR added.
Index script as create misses 'IF NOT EXISTS ' which I don't understand why since your have added create_index sql file that includes that line.

I think, going forward, we can add trigger scripts (currently show error for when clicking script as create) and other scripts if possible.

[samir-puranik]

One minor issue for the last PR added. Index script as create misses 'IF NOT EXISTS ' which I don't understand why since your have added create_index sql file that includes that line.

I think, going forward, we can add trigger scripts (currently show error for when clicking script as create) and other scripts if possible.

Hi Daeun, ah yes I see that for index scripts. can add that in the next PR