liquibase.sqlgenerator.core.DeleteGenerator Maven / Gradle / Ivy
package liquibase.sqlgenerator.core;
import liquibase.database.Database;
import liquibase.datatype.DataTypeFactory;
import liquibase.exception.ValidationErrors;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.DeleteStatement;
import liquibase.structure.core.Column;
import liquibase.structure.core.Relation;
import liquibase.structure.core.Table;
public class DeleteGenerator extends AbstractSqlGenerator {
@Override
public ValidationErrors validate(DeleteStatement deleteStatement, Database database, SqlGeneratorChain sqlGeneratorChain) {
ValidationErrors validationErrors = new ValidationErrors();
validationErrors.checkRequiredField("tableName", deleteStatement.getTableName());
return validationErrors;
}
@Override
public Sql[] generateSql(DeleteStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
StringBuffer sql = new StringBuffer("DELETE FROM " + database.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName()));
if (statement.getWhereClause() != null) {
String fixedWhereClause = " WHERE " + statement.getWhereClause();
for (String columnName : statement.getWhereColumnNames()) {
if (columnName == null) {
continue;
}
fixedWhereClause = fixedWhereClause.replaceFirst(":name",
database.escapeObjectName(columnName, Column.class));
}
for (Object param : statement.getWhereParameters()) {
fixedWhereClause = fixedWhereClause.replaceFirst("\\?|:value", DataTypeFactory.getInstance().fromObject(param, database).objectToSql(param, database).replaceAll("\\$", "\\$"));
}
sql.append(" ").append(fixedWhereClause);
}
return new Sql[]{new UnparsedSql(sql.toString(), getAffectedTable(statement))};
}
protected Relation getAffectedTable(DeleteStatement statement) {
return new Table().setName(statement.getTableName()).setSchema(statement.getCatalogName(), statement.getSchemaName());
}
}