io.ebeaninternal.dbmigration.ddlgeneration.platform.PostgresDdl Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ebean Show documentation

composite of common runtime dependencies for all platforms

There is a newer version: 15.8.1

package io.ebeaninternal.dbmigration.ddlgeneration.platform;

import io.ebean.config.dbplatform.DatabasePlatform;
import io.ebeaninternal.dbmigration.ddlgeneration.DdlBuffer;

import java.io.IOException;

/**
 * Postgres specific DDL.
 */
public class PostgresDdl extends PlatformDdl {

  public PostgresDdl(DatabasePlatform platform) {
    super(platform);
    this.historyDdl = new PostgresHistoryDdl();
    this.dropTableCascade = " cascade";
    this.columnSetType = "type ";
    this.alterTableIfExists = "if exists ";
    this.columnSetNull = "drop not null";
  }

  @Override
  public boolean suppressPrimaryKeyOnPartition() {
    return true;
  }

  @Override
  protected String convertArrayType(String logicalArrayType) {
    return NativeDbArray.logicalToNative(logicalArrayType);
  }

  /**
   * Map bigint, integer and smallint into their equivalent serial types.
   */
  @Override
  public String asIdentityColumn(String columnDefn) {

    if ("bigint".equalsIgnoreCase(columnDefn)) {
      return "bigserial";
    }
    if ("integer".equalsIgnoreCase(columnDefn)) {
      return "serial";
    }
    if ("smallint".equalsIgnoreCase(columnDefn)) {
      return "smallserial";
    }
    return columnDefn;
  }

  @Override
  public void addTablePartition(DdlBuffer apply, String partitionMode, String partitionColumn) throws IOException {
    apply.append(" partition by range (").append(partitionColumn).append(")");
  }
}