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20 package org.sonar.server.platform.db.migration.step;
22 import java.sql.Connection;
23 import java.sql.SQLException;
24 import org.sonar.db.Database;
25 import org.sonar.db.DatabaseUtils;
26 import org.sonar.server.platform.db.migration.sql.CreateIndexBuilder;
28 public abstract class CreateIndexOnColumn extends DdlChange {
30 private final String table;
31 private final String columnName;
32 private final boolean unique;
34 protected CreateIndexOnColumn(Database db, String table, String columnName, boolean unique) {
37 this.columnName = columnName;
42 public void execute(Context context) throws SQLException {
43 try (Connection connection = getDatabase().getDataSource().getConnection()) {
44 if (!DatabaseUtils.indexExistsIgnoreCase(table, newIndexName(), connection)) {
45 context.execute(new CreateIndexBuilder()
47 .setName(newIndexName())
48 .addColumn(columnName)
55 public String newIndexName() {
56 return table + "_" + columnName;