[jOOQ/jOOQ#14009] Add DataType.isBoolean()

jOOQ/src/main/java/org/jooq/DataType.java

@@ -1250,6 +1250,17 @@ public interface DataType<T> extends Named {
      */
     boolean isInteger();
 
+    /**
+     * Whether this data type is any boolean data type.
+     * <p>
+     * This applies to any of these types:
+     * <ul>
+     * <li> {@link SQLDataType#BIT}</li>
+     * <li> {@link SQLDataType#BOOLEAN}</li>
+     * </ul>
+     */
+    boolean isBoolean();
+
     /**
      * Whether this data type is any character data type.
      * <p>

jOOQ/src/main/java/org/jooq/impl/AbstractDataType.java

@@ -802,6 +802,11 @@ implements
         ;
     }
 
+    @Override
+    public final boolean isBoolean() {
+        return tType0() == Boolean.class;
+    }
+
     @Override
     public final boolean isString() {
         return tType0() == String.class;

jOOQ/src/main/java/org/jooq/impl/Coalesce.java

@@ -81,7 +81,7 @@ final class Coalesce<T> extends AbstractField<T> implements QOM.Coalesce<T> {
             case DERBY: {
                 // [#13601] Workaround for https://issues.apache.org/jira/browse/DERBY-7139
                 ctx.visit(DSL.function(N_COALESCE, getDataType(),
-                    Tools.map(fields, f -> f.getType() == Boolean.class ? new ParenthesisedField<>(f) : f, Field[]::new)
+                    Tools.map(fields, f -> f.getDataType().isBoolean() ? new ParenthesisedField<>(f) : f, Field[]::new)
                 ));
                 break;
             }

jOOQ/src/main/java/org/jooq/impl/ParserImpl.java

@@ -7566,7 +7566,7 @@ final class DefaultParseContext extends AbstractScope implements ParseContext {
             DataType dataType = f.getDataType();
             Class<?> type = dataType.getType();
 
-            if (type == Boolean.class)
+            if (dataType.isBoolean())
                 return condition(f);
 
             // [#11631] [#12394] Numeric expressions are booleans in MySQL