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A universal transaction manager that achieves database-agnostic transactions and distributed transactions that span multiple databases
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package com.scalar.db.storage.jdbc.query;
import com.scalar.db.api.ConditionalExpression;
import com.scalar.db.storage.jdbc.RdbEngineStrategy;
public final class QueryUtils {
private QueryUtils() {}
public static String getConditionString(
String columnName, ConditionalExpression.Operator operator, RdbEngineStrategy rdbEngine) {
switch (operator) {
case EQ:
return rdbEngine.enclose(columnName) + "=?";
case NE:
return rdbEngine.enclose(columnName) + "<>?";
case GT:
return rdbEngine.enclose(columnName) + ">?";
case GTE:
return rdbEngine.enclose(columnName) + ">=?";
case LT:
return rdbEngine.enclose(columnName) + "