[jOOQ/jOOQ#8944] Added support for the JSON predicate

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

@@ -1079,6 +1079,22 @@ extends
     @Support({ CUBRID, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE })
     Field<T> shr(Field<? extends Number> value);
 
+    // ------------------------------------------------------------------------
+    // JSON predicates
+    // ------------------------------------------------------------------------
+
+    /**
+     * Create a condition to check if this field contains JSON data.
+     */
+    @Support({ MYSQL })
+    Condition isJSON();
+
+    /**
+     * Create a condition to check if this field does not contain JSON data.
+     */
+    @Support({ MYSQL })
+    Condition isNotJson();
+
     // ------------------------------------------------------------------------
     // NULL predicates
     // ------------------------------------------------------------------------

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

@@ -662,6 +662,16 @@ abstract class AbstractField<T> extends AbstractNamed implements Field<T> {
     // XXX: Conditions created from this field
     // ------------------------------------------------------------------------
 
+    @Override
+    public final Condition isJSON() {
+        return new IsJSON(this, true);
+    }
+
+    @Override
+    public final Condition isNotJson() {
+        return new IsJSON(this, false);
+    }
+
     @Override
     public final Condition isNull() {
         return new IsNull(this, true);

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

@@ -0,0 +1,87 @@
+/*
+ * Licensed 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.
+ *
+ * Other licenses:
+ * -----------------------------------------------------------------------------
+ * Commercial licenses for this work are available. These replace the above
+ * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
+ * database integrations.
+ *
+ * For more information, please visit: http://www.jooq.org/licenses
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+
+package org.jooq.impl;
+
+import static org.jooq.impl.DSL.function;
+import static org.jooq.impl.DSL.inline;
+import static org.jooq.impl.Keywords.K_IS_JSON;
+import static org.jooq.impl.Keywords.K_IS_NOT_JSON;
+import static org.jooq.impl.SQLDataType.BOOLEAN;
+import static org.jooq.impl.SQLDataType.INTEGER;
+
+import org.jooq.Context;
+import org.jooq.Field;
+
+/**
+ * @author Lukas Eder
+ */
+final class IsJSON extends AbstractCondition {
+
+    /**
+     * Generated UID
+     */
+    private static final long serialVersionUID = 5667086904534664235L;
+    private final Field<?>    field;
+    private final boolean     isJSON;
+
+    IsJSON(Field<?> field, boolean isJSON) {
+        this.field = field;
+        this.isJSON = isJSON;
+    }
+
+    @Override
+    public final void accept(Context<?> ctx) {
+        switch (ctx.family()) {
+            case MYSQL:
+                ctx.visit(function("json_valid", BOOLEAN, field));
+                break;
+
+
+
+
+
+
+
+
+            default:
+                ctx.visit(field).sql(' ').visit(isJSON ? K_IS_JSON : K_IS_NOT_JSON);
+                break;
+        }
+    }
+}

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

@@ -191,7 +191,9 @@ final class Keywords {
     static final Keyword K_INTERVAL                         = keyword("interval");
     static final Keyword K_INTO                             = keyword("into");
     static final Keyword K_IS                               = keyword("is");
+    static final Keyword K_IS_NOT_JSON                      = keyword("is not json");
     static final Keyword K_IS_NOT_NULL                      = keyword("is not null");
+    static final Keyword K_IS_JSON                          = keyword("is json");
     static final Keyword K_IS_NULL                          = keyword("is null");
     static final Keyword K_ITERATE                          = keyword("iterate");
     static final Keyword K_JSON                             = keyword("json");