#2206 - Postgres DDL generation - for create index use "if not exists" clause

ebean-ddl-generator/src/test/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/PlatformDdl_CreateIndexTest.java

@@ -0,0 +1,98 @@
+package io.ebeaninternal.dbmigration.ddlgeneration.platform;
+
+import io.ebean.DB;
+import io.ebean.config.DatabaseConfig;
+import io.ebean.config.dbplatform.h2.H2Platform;
+import io.ebean.config.dbplatform.hana.HanaPlatform;
+import io.ebean.config.dbplatform.mysql.MySqlPlatform;
+import io.ebean.config.dbplatform.oracle.OraclePlatform;
+import io.ebean.config.dbplatform.postgres.PostgresPlatform;
+import io.ebean.config.dbplatform.sqlserver.SqlServer17Platform;
+import io.ebeaninternal.dbmigration.ddlgeneration.PlatformDdlBuilder;
+import io.ebeaninternal.dbmigration.migration.CreateIndex;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertEquals;
+
+public class PlatformDdl_CreateIndexTest {
+
+  private final PlatformDdl h2Ddl = PlatformDdlBuilder.create(new H2Platform());
+  private final PlatformDdl pgDdl = PlatformDdlBuilder.create(new PostgresPlatform());
+  private final PlatformDdl mysqlDdl = PlatformDdlBuilder.create(new MySqlPlatform());
+  private final PlatformDdl oraDdl = PlatformDdlBuilder.create(new OraclePlatform());
+  private final PlatformDdl sqlServerDdl = PlatformDdlBuilder.create(new SqlServer17Platform());
+  private final PlatformDdl hanaDdl = PlatformDdlBuilder.create(new HanaPlatform());
+
+  {
+    DatabaseConfig config = DB.getDefault().getPluginApi().getServerConfig();
+    h2Ddl.configure(config);
+    pgDdl.configure(config);
+    mysqlDdl.configure(config);
+    oraDdl.configure(config);
+    sqlServerDdl.configure(config);
+    hanaDdl.configure(config);
+  }
+
+  WriteCreateIndex writeCreateIndex() {
+
+    return writeCreateIndex(true, true);
+  }
+
+  WriteCreateIndex writeCreateIndex(boolean unique, boolean concurrent) {
+    CreateIndex createIndex = new CreateIndex();
+    createIndex.setIndexName("ix_mytab_acol");
+    createIndex.setTableName("mytab");
+    createIndex.setColumns("acol");
+    createIndex.setUnique(unique);
+    createIndex.setConcurrent(concurrent);
+    return new WriteCreateIndex(createIndex);
+  }
+
+  WriteCreateIndex fkeyCreateIndex(boolean unique) {
+    return new WriteCreateIndex("ix_mytab_acol", "mytab", new String[]{"acol"}, unique);
+  }
+
+
+  @Test
+  public void createUniqueIndex() {
+
+    WriteCreateIndex createIndex = writeCreateIndex();
+
+    String sql = h2Ddl.createIndex(createIndex);
+    assertEquals("create unique index ix_mytab_acol on mytab (acol)", sql);
+    sql = pgDdl.createIndex(createIndex);
+    assertEquals("create unique index concurrently if not exists ix_mytab_acol on mytab (acol)", sql);
+    sql = mysqlDdl.createIndex(createIndex);
+    assertEquals("create unique index ix_mytab_acol on mytab (acol)", sql);
+    sql = sqlServerDdl.createIndex(createIndex);
+    assertEquals("create unique index ix_mytab_acol on mytab (acol)", sql);
+    sql = oraDdl.createIndex(createIndex);
+    assertEquals("create unique index ix_mytab_acol on mytab (acol)", sql);
+    sql = hanaDdl.createIndex(createIndex);
+    assertThat(sql).isEqualTo("-- explicit index \"ix_mytab_acol\" for single column \"acol\" of table \"mytab\" is not necessary");
+  }
+
+  @Test
+  public void postgres_createIndex() {
+
+    String sql = pgDdl.createIndex(writeCreateIndex(true, true));
+    assertEquals("create unique index concurrently if not exists ix_mytab_acol on mytab (acol)", sql);
+    sql = pgDdl.createIndex(writeCreateIndex(false, false));
+    assertEquals("create index if not exists ix_mytab_acol on mytab (acol)", sql);
+    sql = pgDdl.createIndex(writeCreateIndex(true, false));
+    assertEquals("create unique index if not exists ix_mytab_acol on mytab (acol)", sql);
+    sql = pgDdl.createIndex(writeCreateIndex(false, true));
+    assertEquals("create index concurrently if not exists ix_mytab_acol on mytab (acol)", sql);
+  }
+
+  @Test
+  public void postgres_fkeyCreateIndex() {
+    String sql = pgDdl.createIndex(fkeyCreateIndex(true));
+    assertEquals("create unique index ix_mytab_acol on mytab (acol)", sql);
+
+    sql = pgDdl.createIndex(fkeyCreateIndex(false));
+    assertEquals("create index ix_mytab_acol on mytab (acol)", sql);
+  }
+
+}