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Java-based middleware for in-memory processing of big data in a distributed environment.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.internal.processors.odbc.odbc.escape;
/**
* ODBC escape sequence type.
*/
public enum OdbcEscapeType {
/** Scalar function. */
SCALAR_FUNCTION("fn", true, false),
/** Outer join. */
OUTER_JOIN("oj", true, false),
/** Stored procedure call */
CALL("call", true, false),
/** Date. */
DATE("d", true, false),
/** Timestamp. */
TIMESTAMP("ts", true, false),
/** Time. */
TIME("t", true, false),
/** GUID. */
GUID("guid", true, false),
/** LIKE escape character clause. */
ESCAPE_WO_TOKEN("\'", false, false),
/** LIKE escape character clause. */
ESCAPE("escape", true, false);
/** Values in convenient order. */
private static final OdbcEscapeType[] VALS = new OdbcEscapeType[] {
SCALAR_FUNCTION, // Assume that scalar functions are very frequent.
DATE, TIMESTAMP, // Date and timestamp are relatively frequent as well; also TS must go before T.
OUTER_JOIN, // Joins are less frequent,
CALL, // Procedure calls are less frequent than joins.
ESCAPE_WO_TOKEN, ESCAPE, TIME, GUID // LIKE, TIME and GUID are even less frequent.
};
/**
* Get values in convenient order, where the most frequent values goes first, and "startsWith" invocation is
* enough to get type (i.e. "ts" goes before "t").
*
* @return Values.
*/
public static OdbcEscapeType[] sortedValues() {
return VALS;
}
/** Escape sequence body. */
private final String body;
/** Whether this is a standard token with no special handling. */
private final boolean standard;
/** Whether empty escape sequence is allowed. */
private final boolean allowEmpty;
/**
* Constructor.
*
* @param body Escape sequence body.
* @param standard Whether this is a standard token with no special handling.
* @param allowEmpty Whether empty escape sequence is allowed.
*/
OdbcEscapeType(String body, boolean standard, boolean allowEmpty) {
this.body = body;
this.standard = standard;
this.allowEmpty = allowEmpty;
}
/**
* @return Escape sequence body.
*/
public String body() {
return body;
}
/**
* @return Whether this is a standard token with no special handling.
*/
public boolean standard() {
return standard;
}
/**
* @return Whether empty escape sequence is allowed.
*/
public boolean allowEmpty() {
return allowEmpty;
}
}