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fix: add GRACE and PERIOD to the nonReserved and automate testing (#8596
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Original file line number | Diff line number | Diff line change |
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@@ -336,6 +336,7 @@ nonReserved | |
| EMIT | ||
| CHANGES | ||
| ESCAPE | ||
| GRACE | PERIOD | ||
; | ||
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EMIT: 'EMIT'; | ||
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ksqldb-parser/src/test/java/io/confluent/ksql/parser/ReservedWordMetaTest.java
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/* | ||
* Copyright 2020 Confluent Inc. | ||
* | ||
* Licensed under the Confluent Community License (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.confluent.io/confluent-community-license | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
* WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations under the License. | ||
*/ | ||
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package io.confluent.ksql.parser; | ||
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import com.google.common.collect.ImmutableSet; | ||
import java.util.Set; | ||
import java.util.stream.Collectors; | ||
import org.antlr.v4.runtime.CharStreams; | ||
import org.antlr.v4.runtime.CommonTokenStream; | ||
import org.antlr.v4.runtime.Vocabulary; | ||
import org.antlr.v4.runtime.atn.PredictionMode; | ||
import org.apache.commons.lang3.text.WordUtils; | ||
import org.hamcrest.Matchers; | ||
import org.junit.Assert; | ||
import org.junit.Ignore; | ||
import org.junit.Test; | ||
import static org.hamcrest.MatcherAssert.assertThat; | ||
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/** | ||
* This test ensures that we don't accidentally add words to our grammar | ||
* without adding them to our "nonReserved" list. This is necessary because | ||
* adding words to our grammar is backwards incompatible if anyone has issued | ||
* a query in the past that used on of those words. | ||
*/ | ||
public class ReservedWordMetaTest { | ||
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private static final String[] RESERVED = new String[]{"SELECT", "FROM", "AS", | ||
"ALL", "DISTINCT", "WHERE", "WITHIN", "WINDOW", "GROUP", "BY", "HAVING", | ||
"LIMIT", "AT", "OR", "AND", "IN", "NOT", "EXISTS", "BETWEEN", "LIKE", "IS", | ||
"NULL", "TRUE", "FALSE", "MILLISECOND", "YEARS", "MONTHS", "DAYS", "HOURS", | ||
"MINUTES", "SECONDS", "MILLISECONDS", "TUMBLING", "HOPPING", "SIZE", "ADVANCE", | ||
"RETENTION", "CASE", "WHEN", "THEN", "ELSE", "END", "JOIN", "FULL", "OUTER", | ||
"INNER", "LEFT", "RIGHT", "ON", "WITH", "VALUES", "CREATE", "TABLE", "TOPIC", | ||
"STREAM", "STREAMS", "INSERT", "DELETE", "INTO", "DESCRIBE", "EXTENDED", | ||
"PRINT", "CAST", "LIST", "TOPICS", "QUERY", "QUERIES", "TERMINATE", "LOAD", | ||
"DROP", "TO", "RENAME", "SAMPLE", "EXPORT", "CATALOG", "PROPERTIES", | ||
"BEGINNING", "UNSET", "RUN", "SCRIPT", "DECIMAL", "CONNECTOR", "CONNECTORS", | ||
"NAMESPACE", "MATERIALIZED", "VIEW", "EQ", "NEQ", "LT", "LTE", "GT", "GTE", | ||
"PLUS", "MINUS", "ASTERISK", "SLASH", "PERCENT", "CONCAT", "ASSIGN", | ||
"STRUCT_FIELD_REF", "STRING", "INTEGER_VALUE", "DECIMAL_VALUE", | ||
"FLOATING_POINT_VALUE", "IDENTIFIER", "DIGIT_IDENTIFIER", "QUOTED_IDENTIFIER", | ||
"BACKQUOTED_IDENTIFIER", "TIME_WITH_TIME_ZONE", "TIMESTAMP_WITH_TIME_ZONE", | ||
"SIMPLE_COMMENT", "BRACKETED_COMMENT", "WS", "UNRECOGNIZED"}; | ||
private static final Set<String> RESERVED_SET = ImmutableSet.copyOf(RESERVED); | ||
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/** | ||
* Enable this test to re-generate the grammar that is intentionally | ||
* part of the reserved words. | ||
*/ | ||
@Test | ||
@Ignore | ||
public void generateExcludedWords() { | ||
final Vocabulary vocabulary = SqlBaseParser.VOCABULARY; | ||
final int tokens = vocabulary.getMaxTokenType(); | ||
final ImmutableSet.Builder<String> builder = ImmutableSet.builder(); | ||
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for (int i = 0; i < tokens; i++) { | ||
final String symbolicName = vocabulary.getSymbolicName(i); | ||
if (symbolicName != null) { | ||
try { | ||
buildParser(symbolicName).nonReserved(); | ||
} catch (final ParsingException e) { | ||
// word is reserved (not in nonReserved) | ||
builder.add(symbolicName); | ||
} | ||
} | ||
} | ||
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final ImmutableSet<String> reserved = builder.build(); | ||
System.out.println(WordUtils.wrap("private static final String[] RESERVED = new String[]{" | ||
+ reserved | ||
.stream() | ||
.map(s -> '"' + s + '"') | ||
.collect(Collectors.joining(", ")) + "};", 80, "\n\t\t", false)); | ||
} | ||
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@Test | ||
public void shouldAddWordToNonReserved() { | ||
final Vocabulary vocabulary = SqlBaseParser.VOCABULARY; | ||
final int tokens = vocabulary.getMaxTokenType(); | ||
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for (int i = 0; i < tokens; i++) { | ||
final String symbolicName = vocabulary.getSymbolicName(i); | ||
if (symbolicName != null) { | ||
try { | ||
buildParser(symbolicName).nonReserved(); | ||
} catch (final ParsingException e) { | ||
assertThat( | ||
String.format("Detected new word ('%s') in the vocabulary that is reserved. " | ||
+ "This is a breaking change!! If this is intentional, then add it to " | ||
+ "the RESERVED set in this test, otherwise please add it to the nonReserved " | ||
+ "parser rule.", symbolicName), symbolicName, Matchers.isIn(RESERVED_SET)); | ||
} | ||
} | ||
} | ||
} | ||
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private static SqlBaseParser buildParser(final String symbolicName) { | ||
final SqlBaseLexer lexer = new SqlBaseLexer( | ||
new CaseInsensitiveStream(CharStreams.fromString(symbolicName))); | ||
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final CommonTokenStream tokenStream = new CommonTokenStream(lexer); | ||
final SqlBaseParser parser = new SqlBaseParser(tokenStream); | ||
parser.removeErrorListeners(); | ||
parser.addErrorListener(DefaultKsqlParser.ERROR_LISTENER); | ||
parser.getInterpreter().setPredictionMode(PredictionMode.LL); | ||
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return parser; | ||
} | ||
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} |