#426: Support ANALYZE TABLE statement

h2/src/docsrc/help/help.csv

@@ -415,9 +415,11 @@ ALTER VIEW ADDRESS_VIEW RECOMPILE
 "
 
 "Commands (DDL)","ANALYZE","
-ANALYZE [ SAMPLE_SIZE rowCountInt ]
+ANALYZE [ TABLE tableName ] [ SAMPLE_SIZE rowCountInt ]
 ","
-Updates the selectivity statistics of all tables. The selectivity is used by the
+Updates the selectivity statistics of tables.
+If no table name is given, all tables are analyzed.
+The selectivity is used by the
 cost based optimizer to select the best index for a given query. If no sample
 size is set, up to 10000 rows per table are read. The value 0 means all rows are
 read. The selectivity can be set manually using ALTER TABLE ALTER COLUMN

h2/src/docsrc/html/changelog.html

@@ -21,6 +21,8 @@ Change Log
 
 <h2>Next Version (unreleased)</h2>
 <ul>
+<li>Issue #426: Support ANALYZE TABLE statement
+</li>
 <li>Issue #472: Support CREATE SEQUENCE ... ORDER as a NOOP for Oracle compatibility
 </li>
 </ul>

h2/src/main/org/h2/command/Parser.java

@@ -550,6 +550,11 @@ public class Parser {
 
     private Prepared parseAnalyze() {
         Analyze command = new Analyze(session);
+        if (readIf("TABLE")) {
+            Table table = readTableOrView();
+            command.setTable(table);
+            command.setTop(readPositiveInt());
+        }
         if (readIf("SAMPLE_SIZE")) {
             command.setTop(readPositiveInt());
         }

h2/src/main/org/h2/command/ddl/Analyze.java

@@ -22,8 +22,8 @@ import org.h2.value.ValueInt;
 import org.h2.value.ValueNull;
 
 /**
- * This class represents the statement
- * ANALYZE
+ * This class represents the statements
+ * ANALYZE and ANALYZE TABLE
  */
 public class Analyze extends DefineCommand {
 
@@ -31,20 +31,32 @@ public class Analyze extends DefineCommand {
      * The sample size.
      */
     private int sampleRows;
+    /**
+     * used in ANALYZE TABLE...
+     */
+    private Table table;
 
     public Analyze(Session session) {
         super(session);
         sampleRows = session.getDatabase().getSettings().analyzeSample;
     }
 
+    public void setTable(Table table) {
+        this.table = table;
+    }
+
     @Override
     public int update() {
         session.commit(true);
         session.getUser().checkAdmin();
         Database db = session.getDatabase();
+        if (table != null) {
+            analyzeTable(session, table, sampleRows, true);
+        } else {
             for (Table table : db.getAllTablesAndViews(false)) {
                 analyzeTable(session, table, sampleRows, true);
             }
+        }
         return 0;
     }