liquibase.sqlgenerator.core.InsertOrUpdateGeneratorMySQL Maven / Gradle / Ivy
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Liquibase is a tool for managing and executing database changes.
package liquibase.sqlgenerator.core;
import liquibase.database.Database;
import liquibase.database.core.MySQLDatabase;
import liquibase.datatype.DataTypeFactory;
import liquibase.exception.LiquibaseException;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.InsertOrUpdateStatement;
import liquibase.structure.core.Column;
import java.util.Arrays;
import java.util.HashSet;
/**
*
* @author Carles
*/
public class InsertOrUpdateGeneratorMySQL extends InsertOrUpdateGenerator {
@Override
public boolean supports(InsertOrUpdateStatement statement, Database database) {
return database instanceof MySQLDatabase;
}
@Override
protected String getInsertStatement(InsertOrUpdateStatement insertOrUpdateStatement, Database database, SqlGeneratorChain sqlGeneratorChain) {
StringBuilder sql = new StringBuilder(super.getInsertStatement(insertOrUpdateStatement, database, sqlGeneratorChain));
sql.deleteCharAt(sql.lastIndexOf(";"));
StringBuilder updateClause = new StringBuilder("ON DUPLICATE KEY UPDATE ");
String[] pkFields=insertOrUpdateStatement.getPrimaryKey().split(",");
HashSet hashPkFields = new HashSet<>(Arrays.asList(pkFields));
boolean hasFields = false;
for(String columnKey:insertOrUpdateStatement.getColumnValues().keySet())
{
if (!hashPkFields.contains(columnKey) && insertOrUpdateStatement.getAllowColumnUpdate(columnKey)) {
hasFields = true;
updateClause.append(database.escapeObjectName(columnKey, Column.class)).append(" = ");
Object columnValue = insertOrUpdateStatement.getColumnValue(columnKey);
updateClause.append(DataTypeFactory.getInstance().fromObject(columnValue, database).objectToSql(columnValue, database));
updateClause.append(",");
}
}
if(hasFields) {
// append the updateClause onto the end of the insert statement
updateClause.deleteCharAt(updateClause.lastIndexOf(","));
sql.append(updateClause);
} else {
// insert IGNORE keyword into insert statement
sql.insert(sql.indexOf("INSERT ")+"INSERT ".length(), "IGNORE ");
}
return sql.toString();
}
@Override
protected String getUpdateStatement(InsertOrUpdateStatement insertOrUpdateStatement, Database database, String whereClause, SqlGeneratorChain sqlGeneratorChain) throws LiquibaseException {
if (insertOrUpdateStatement.getOnlyUpdate()) {
return super.getUpdateStatement(insertOrUpdateStatement, database, whereClause, sqlGeneratorChain);
} else {
return "";
}
}
@Override
protected String getRecordCheck(InsertOrUpdateStatement insertOrUpdateStatement, Database database, String whereClause) {
return "";
}
@Override
protected String getElse(Database database) {
return "";
}
}