support postgresql create index syntax

Author: ted-johnson

src/main/java/net/sf/jsqlparser/statement/create/index/CreateIndex.java

@@ -57,6 +57,11 @@ public String toString() {
         buffer.append(" ON ");
         buffer.append(table.getFullyQualifiedName());
 
+        if (index.getUsing() != null){
+            buffer.append(" USING ");
+            buffer.append(index.getUsing());
+        }
+
         if (index.getColumnsNames() != null) {
             buffer.append(" (");
 

src/main/java/net/sf/jsqlparser/statement/create/table/Index.java

@@ -16,6 +16,7 @@
 public class Index {
 
     private String type;
+    private String using;
     private List<String> columnsNames;
     private String name;
     private List<String> idxSpec;
@@ -32,6 +33,17 @@ public String getType() {
         return type;
     }
 
+    /**
+     * In postgresql, the index type (Btree, GIST, etc.) is indicated
+     * with a USING clause.
+     * Please note that:
+     *  Oracle - the type might be BITMAP, indicating a bitmap kind of index
+     *  MySQL - the type might be FULLTEXT or SPATIAL
+    */
+    public void setUsing(String string) {
+        using = string;
+    }
+
     public void setColumnsNames(List<String> list) {
         columnsNames = list;
     }
@@ -44,6 +56,10 @@ public void setType(String string) {
         type = string;
     }
 
+    public String getUsing() {
+        return using;
+    }
+
     public List<String> getIndexSpec() {
         return idxSpec;
     }

src/main/java/net/sf/jsqlparser/util/deparser/CreateIndexDeParser.java

@@ -37,6 +37,12 @@ public void deParse(CreateIndex createIndex) {
         buffer.append(" ON ");
         buffer.append(createIndex.getTable().getFullyQualifiedName());
 
+        String using = index.getUsing();
+        if (using != null){
+            buffer.append(" USING ");
+            buffer.append(using);
+        }
+
         if (index.getColumnsNames() != null) {
             buffer.append(" (");
             for (Iterator iter = index.getColumnsNames().iterator(); iter.hasNext();) {

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -3290,6 +3290,7 @@ CreateIndex CreateIndex():
     Table table = null;
     List<String> colNames = new ArrayList<String>();
     Token columnName;
+    Token using;
     Index index = null;
     String name = null;
     List<String> parameter = new ArrayList<String>();
@@ -3307,6 +3308,8 @@ CreateIndex CreateIndex():
 
     <K_ON> table=Table()
 
+    [ <K_USING> using=<S_IDENTIFIER> {index.setUsing(using.image);} ]
+
     "("
     (columnName=<S_IDENTIFIER>
     |

src/test/java/net/sf/jsqlparser/statement/create/CreateIndexTest.java

@@ -91,6 +91,21 @@ public void testCreateIndex6() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed(stmt);
     }
 
+    @Test
+    public void testCreateIndex7() throws JSQLParserException {
+        String statement
+                = "CREATE INDEX myindex1 ON mytab USING GIST (mycol)";
+        CreateIndex createIndex = (CreateIndex) parserManager.parse(new StringReader(statement));
+        assertEquals(1, createIndex.getIndex().getColumnsNames().size());
+        assertEquals("myindex1", createIndex.getIndex().getName());
+        assertNull(createIndex.getIndex().getType());
+        assertEquals("mytab", createIndex.getTable().getFullyQualifiedName());
+        assertEquals("mycol", createIndex.getIndex().getColumnsNames().get(0));
+        assertEquals("GIST", createIndex.getIndex().getUsing()); 
+        assertEquals(statement, "" + createIndex);
+        assertSqlCanBeParsedAndDeparsed(statement);
+    }
+
     @Test
     @Ignore
     public void testCreateIndexIssue633() throws JSQLParserException {