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fix regexp_like, contains_string, icontains_string to return null instead of false for null inputs in sql compatible mode (#15963)

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Clint Wylie 2024-03-19 22:12:47 -07:00 committed by GitHub
parent 2b23d0b5b5
commit 48b8d42698
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6 changed files with 21 additions and 19 deletions
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2
processing/src/main/java/org/apache/druid/query/expression/ContainsExpr.java
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@ -71,7 +71,7 @@ class ContainsExpr extends ExprMacroTable.BaseScalarMacroFunctionExpr
if (s == null) {
// same behavior as regexp_like.
return ExprEval.ofLongBoolean(false);
return ExprEval.ofLong(null);
} else {
final boolean doesContain = searchFunction.apply(s);
return ExprEval.ofLongBoolean(doesContain);

2
processing/src/main/java/org/apache/druid/query/expression/RegexpLikeExprMacro.java
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@ -74,7 +74,7 @@ public class RegexpLikeExprMacro implements ExprMacroTable.ExprMacro
if (s == null) {
// True nulls do not match anything. Note: this branch only executes in SQL-compatible null handling mode.
return ExprEval.ofLongBoolean(false);
return ExprEval.ofLong(null);
} else {
final Matcher matcher = pattern.matcher(s);
return ExprEval.ofLongBoolean(matcher.find());

12
processing/src/test/java/org/apache/druid/query/expression/CaseInsensitiveExprMacroTest.java
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@ -166,11 +166,11 @@ public class CaseInsensitiveExprMacroTest extends MacroTestBase
@Test
public void testEmptyStringSearchOnNull()
{
final ExprEval<?> result = eval("icontains_string(a, '')", InputBindings.nilBindings());
Assert.assertEquals(
ExprEval.ofLongBoolean(!NullHandling.sqlCompatible()).value(),
result.value()
);
ExprEval<?> result = eval("icontains_string(a, '')", InputBindings.nilBindings());
if (NullHandling.sqlCompatible()) {
Assert.assertNull(result.value());
} else {
Assert.assertEquals(ExprEval.ofLongBoolean(true).value(), result.value());
}
}
}

9
processing/src/test/java/org/apache/druid/query/expression/ContainsExprMacroTest.java
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@ -151,9 +151,10 @@ public class ContainsExprMacroTest extends MacroTestBase
public void testEmptyStringSearchOnNull()
{
final ExprEval<?> result = eval("contains_string(a, '')", InputBindings.nilBindings());
Assert.assertEquals(
ExprEval.ofLongBoolean(!NullHandling.sqlCompatible()).value(),
result.value()
);
if (NullHandling.sqlCompatible()) {
Assert.assertNull(result.value());
} else {
Assert.assertEquals(ExprEval.ofLongBoolean(true).value(), result.value());
}
}
}

9
processing/src/test/java/org/apache/druid/query/expression/RegexpLikeExprMacroTest.java
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@ -151,9 +151,10 @@ public class RegexpLikeExprMacroTest extends MacroTestBase
public void testEmptyStringPatternOnNull()
{
final ExprEval<?> result = eval("regexp_like(a, '')", InputBindings.nilBindings());
Assert.assertEquals(
ExprEval.ofLongBoolean(NullHandling.replaceWithDefault()).value(),
result.value()
);
if (NullHandling.sqlCompatible()) {
Assert.assertNull(result.value());
} else {
Assert.assertEquals(ExprEval.ofLongBoolean(true).value(), result.value());
}
}
}

6
sql/src/test/java/org/apache/druid/sql/calcite/expression/ExpressionsTest.java
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@ -581,7 +581,7 @@ public class ExpressionsTest extends CalciteTestBase
testHelper.makeLiteral("(.)")
),
makeExpression("regexp_like(null,'(.)')"),
0L
NullHandling.sqlCompatible() ? null : 0L
);
testHelper.testExpressionString(
@ -593,7 +593,7 @@ public class ExpressionsTest extends CalciteTestBase
makeExpression("regexp_like(null,'')"),
// In SQL-compatible mode, nulls don't match anything. Otherwise, they match like empty strings.
NullHandling.sqlCompatible() ? 0L : 1L
NullHandling.sqlCompatible() ? null : 1L
);
testHelper.testExpressionString(
@ -603,7 +603,7 @@ public class ExpressionsTest extends CalciteTestBase
testHelper.makeLiteral("null")
),
makeExpression("regexp_like(null,'null')"),
0L
NullHandling.sqlCompatible() ? null : 0L
);
}