refactor: add similar_series table.

Fix #968

Author: azorinmsu

src/main/resources/liquibase/version/0.4.xml

@@ -54,5 +54,6 @@
 	<include file="0.4/2018-06-18--test_paid_user.xml" relativeToChangelogFile="true" />
 	<include file="0.4/2018-07-05--series_import_parsed_data_michel_numbers_field.xml" relativeToChangelogFile="true" />
 	<include file="0.4/2018-07-15--series_import_parsed_data_group_id_field.xml" relativeToChangelogFile="true" />
-	
+	<include file="0.4/2018-10-16--similar_series.xml" relativeToChangelogFile="true"/>
+
 </databaseChangeLog>

src/main/resources/liquibase/version/0.4/2018-10-16--similar_series.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<databaseChangeLog
+	xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+		http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.0.xsd">
+
+	<changeSet id="similar-series-create-table" author="azorin" context="scheme">
+		<createTable tableName="similar_series">
+			<column name="series_id" type="INTEGER">
+				<constraints nullable="false" references="series(id)" foreignKeyName="fk_similar_series_series_id"/>
+			</column>
+			<column name="similar_series_id" type="INTEGER">
+				<constraints nullable="false" references="series(id)" foreignKeyName="fk_similar_series_similar_series_id"/>
+			</column>
+		</createTable>
+		<addUniqueConstraint
+			tableName="similar_series"
+			columnNames="series_id, similar_series_id"
+			constraintName="uc_similar_series_series_id_similar_series_id"/>
+	</changeSet>
+</databaseChangeLog>