
USE fetchmetrics;

SELECT CONCAT('WARNING: Table ', TABLE_SCHEMA, '.', TABLE_NAME, ' already exists.') AS msg_warning 
FROM INFORMATION_SCHEMA.TABLES 
WHERE 
        TABLE_SCHEMA = 'fetchmetrics' 
    AND TABLE_NAME = 'DOG_Training_Technique_Audit'
;

CREATE TABLE IF NOT EXISTS fetchmetrics.DOG_Training_Technique_Audit (
	  id_audit INT NOT NULL AUTO_INCREMENT PRIMARY KEY
	, id_training_technique INT NOT NULL
	, CONSTRAINT FK_DOG_Training_Technique_Audit_id_training_technique
		FOREIGN KEY (id_training_technique)
		REFERENCES fetchmetrics.DOG_Training_Technique(id_technique)
	, name_field VARCHAR(255) NOT NULL
	, value_prev TEXT
	, value_new TEXT
	, id_change_set INT NOT NULL
	, CONSTRAINT FK_DOG_Training_Technique_Audit_id_change_set
		FOREIGN KEY (id_change_set) 
		REFERENCES fetchmetrics.DOG_Dog_Change_Set(id_change_set)
);
