From 1a47049b7c8ee6a3d5663a15b5cbb635daa067e1 Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Thu, 20 Sep 2018 11:20:40 +0200
Subject: [PATCH] [#7872] Add support for HSQLDB EXPLAIN PLAN FOR

---
 jOOQ/src/main/java/org/jooq/DSLContext.java        |  2 +-
 jOOQ/src/main/java/org/jooq/impl/ExplainQuery.java | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/jOOQ/src/main/java/org/jooq/DSLContext.java b/jOOQ/src/main/java/org/jooq/DSLContext.java
index 7f4f5b1ffa..5903c24f54 100644
--- a/jOOQ/src/main/java/org/jooq/DSLContext.java
+++ b/jOOQ/src/main/java/org/jooq/DSLContext.java
@@ -340,7 +340,7 @@ public interface DSLContext extends Scope , AutoCloseable  {
      * Run an <code>EXPLAIN</code> statement in the database to estimate the
      * cardinality of the query.
      */
-    @Support({ H2, MYSQL, POSTGRES })
+    @Support({ H2, HSQLDB, MYSQL, POSTGRES })
     Explain explain(Query query);
 
     // -------------------------------------------------------------------------
diff --git a/jOOQ/src/main/java/org/jooq/impl/ExplainQuery.java b/jOOQ/src/main/java/org/jooq/impl/ExplainQuery.java
index 4f8f384767..e133f1ff2b 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ExplainQuery.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ExplainQuery.java
@@ -95,6 +95,10 @@ final class ExplainQuery {
                 result = ctx.fetch("{explain analyze} {0}", query);
                 break;
 
+            case HSQLDB:
+                result = ctx.fetch("{explain plan for} {0}", query);
+                break;
+
 
 
 
@@ -134,8 +138,11 @@ final class ExplainQuery {
 
 
 
-            case H2: {
-                // H2's EXPLAIN ANALYZE output is rather difficult to digest
+            // H2's EXPLAIN ANALYZE output is rather difficult to digest
+            case H2:
+
+            // HSQLDB's EXPLAIN PLAN FOR output doesn't contain any useful additional information
+            case HSQLDB: {
                 break;
             }
             case MARIADB: