public Sql[] generateSql(
SelectFromDatabaseChangeLogStatement statement,
Database database,
SqlGeneratorChain sqlGeneratorChain) {
String sql =
"SELECT "
+ StringUtils.join(statement.getColumnsToSelect(), ",").toUpperCase()
+ " FROM "
+ database.escapeTableName(
database.getLiquibaseSchemaName(), database.getDatabaseChangeLogTableName());
SelectFromDatabaseChangeLogStatement.WhereClause whereClause = statement.getWhereClause();
if (whereClause != null) {
if (whereClause instanceof SelectFromDatabaseChangeLogStatement.ByTag) {
sql +=
" WHERE TAG='"
+ ((SelectFromDatabaseChangeLogStatement.ByTag) whereClause).getTagName()
+ "'";
} else if (whereClause instanceof SelectFromDatabaseChangeLogStatement.ByNotNullCheckSum) {
sql += " WHERE MD5SUM IS NOT NULL";
} else {
throw new UnexpectedLiquibaseException(
"Unknown where clause type: " + whereClause.getClass().getName());
}
}
if (statement.getOrderByColumns() != null && statement.getOrderByColumns().length > 0) {
sql += " ORDER BY " + StringUtils.join(statement.getOrderByColumns(), ", ").toUpperCase();
}
return new Sql[] {new UnparsedSql(sql)};
}
public ValidationErrors validate(
SelectFromDatabaseChangeLogStatement statement,
Database database,
SqlGeneratorChain sqlGeneratorChain) {
ValidationErrors errors = new ValidationErrors();
errors.checkRequiredField("columnToSelect", statement.getColumnsToSelect());
return errors;
}