Issue 472: PgServer does not work with any recent Postgres JDBC driver, patch from Andrew Franklin

h2/src/docsrc/html/changelog.html

@@ -40,6 +40,7 @@ Change Log
 </li><li>Issue 471: CREATE VIEW does not check user rights, patch from Andrew Franklin
 </li><li>Issue 477: PgServer binary transmission of query params is unimplemented, patch from Andrew Franklin
 </li><li>Issue 479: Support for SUBSTRING without a FROM condition, patch from Andrew Franklin
+</li><li>Issue 472: PgServer does not work with any recent Postgres JDBC driver, patch from Andrew Franklin
 </li></ul>
 
 <h2>Version 1.3.172 (2013-05-25)</h2>

h2/src/main/org/h2/server/pg/PgServer.java

@@ -456,6 +456,14 @@ public class PgServer implements Service {
         return 1;
     }
 
+    /**
+     * A fake wrapper around pg_get_expr(expr_text, relation_oid), in PG it decompiles the "internal form of an
+     * expression, assuming that any Vars in it refer to the relation indicated by the second parameter".
+     */
+    public static String getPgExpr(String exprText, int relationOid) {
+        return null;
+    }
+
     /**
      * Convert the SQL type to a PostgreSQL type
      *

h2/src/main/org/h2/server/pg/PgServerThread.java

@@ -25,6 +25,7 @@ import java.sql.ResultSet;
 import java.sql.ResultSetMetaData;
 import java.sql.SQLException;
 import java.sql.Statement;
+import java.sql.Types;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Properties;
@@ -341,8 +342,7 @@ public class PgServerThread implements Runnable {
                 if (result) {
                     try {
                         ResultSet rs = prep.getResultSet();
-                        ResultSetMetaData meta = rs.getMetaData();
-                        sendRowDescription(meta);
+                        // the meta-data is sent in the prior 'Describe'
                         while (rs.next()) {
                             sendDataRow(rs);
                         }
@@ -483,13 +483,21 @@ public class PgServerThread implements Runnable {
 
     private void writeDataColumn(ResultSet rs, int column, int pgType) throws Exception {
         if (formatAsText(pgType)) {
-            String s = rs.getString(column);
-            if (s==null) {
-                writeInt(-1);
-            } else {
-                byte[] data = s.getBytes(getEncoding());
-                writeInt(data.length);
-                write(data);
+            // plain text
+            switch (pgType) {
+            case PgServer.PG_TYPE_BOOL:
+                writeInt(1);
+                dataOut.writeByte(rs.getBoolean(column) ? 't' : 'f');
+                break;
+            default:
+                String s = rs.getString(column);
+                if (s==null) {
+                    writeInt(-1);
+                } else {
+                    byte[] data = s.getBytes(getEncoding());
+                    writeInt(data.length);
+                    write(data);
+                }
             }
         } else {
             // binary
@@ -540,7 +548,9 @@ public class PgServerThread implements Runnable {
         boolean text = (i >= formatCodes.length) || (formatCodes[i] == 0);
         int col = i + 1;
         int paramLen = readInt();
-        if (text) {
+        if (paramLen==-1) {
+            prep.setNull(i, Types.NULL);
+        } else if (text) {
             // plain text
             byte[] data = DataUtils.newBytes(paramLen);
             readFully(data);
@@ -661,7 +671,7 @@ public class PgServerThread implements Runnable {
                 String name = meta.getColumnName(i + 1);
                 names[i] = name;
                 int type = meta.getColumnType(i + 1);
-                type = PgServer.convertType(type);
+                int pgType = PgServer.convertType(type);
                 // the ODBC client needs the column pg_catalog.pg_index
                 // to be of type 'int2vector'
                 // if (name.equalsIgnoreCase("indkey") &&
@@ -669,8 +679,10 @@ public class PgServerThread implements Runnable {
                 //     type = PgServer.PG_TYPE_INT2VECTOR;
                 // }
                 precision[i] = meta.getColumnDisplaySize(i + 1);
-                server.checkType(type);
-                types[i] = type;
+                if (type!=Types.NULL) {
+                    server.checkType(pgType);
+                }
+                types[i] = pgType;
             }
             startMessage('T');
             writeShort(columns);
@@ -705,6 +717,8 @@ public class PgServerThread implements Runnable {
 
     private static int getTypeSize(int pgType, int precision) {
         switch (pgType) {
+        case PgServer.PG_TYPE_BOOL:
+            return 1;
         case PgServer.PG_TYPE_VARCHAR:
             return Math.max(255, precision + 10);
         default:

h2/src/main/org/h2/server/pg/pg_catalog.sql

@@ -42,7 +42,9 @@ create table pg_catalog.pg_type(
     typlen int,
     typtype varchar,
     typbasetype int,
-    typtypmod int);
+    typtypmod int,
+    typnotnull boolean
+);
 grant select on pg_catalog.pg_type to public;
 
 insert into pg_catalog.pg_type
@@ -53,7 +55,8 @@ select
     -1 typlen,
     'c' typtype,
     0 typbasetype,
-    -1 typtypmod
+    -1 typtypmod,
+    false typnotnull
 from information_schema.type_info
 where pos = 0
     and pg_convertType(data_type) <> 705; -- not unknown
@@ -65,7 +68,8 @@ merge into pg_catalog.pg_type values(
     -1,
     'c',
     0,
-    -1
+    -1,
+    false
 );
 merge into pg_catalog.pg_type values(
     0,
@@ -74,7 +78,8 @@ merge into pg_catalog.pg_type values(
     -1,
     'c',
     0,
-    -1
+    -1,
+    false
 );
 merge into pg_catalog.pg_type values(
     22,
@@ -83,7 +88,8 @@ merge into pg_catalog.pg_type values(
     -1,
     'c',
     0,
-    -1
+    -1,
+    false
 );
 
 create view pg_catalog.pg_class -- (oid, relname, relnamespace, relkind, relam, reltuples, relpages, relhasrules, relhasoids)
@@ -140,7 +146,8 @@ select
     id oid,
     0 adsrc,
     0 adrelid,
-    0 adnum
+    0 adnum,
+    null adbin
 from information_schema.tables where 1=0;
 grant select on pg_catalog.pg_attrdef to public;
 
@@ -179,7 +186,7 @@ and t.table_name = c.table_name
 and t.table_schema = c.table_schema;
 grant select on pg_catalog.pg_attribute to public;
 
-create view pg_catalog.pg_index -- (oid, indexrelid, indrelid, indisclustered, indisunique, indisprimary, indexprs, indkey)
+create view pg_catalog.pg_index -- (oid, indexrelid, indrelid, indisclustered, indisunique, indisprimary, indexprs, indkey, indpred)
 as
 select
     i.id oid,
@@ -189,7 +196,8 @@ select
     not non_unique indisunique,
     primary_key indisprimary,
     cast('' as varchar_ignorecase) indexprs,
-    cast(1 as array) indkey
+    cast(1 as array) indkey,
+    null indpred
 from information_schema.indexes i, information_schema.tables t
 where i.table_schema = t.table_schema
 and i.table_name = t.table_name
@@ -201,6 +209,12 @@ grant select on pg_catalog.pg_index to public;
 drop alias if exists pg_get_indexdef;
 create alias pg_get_indexdef for "org.h2.server.pg.PgServer.getIndexColumn";
 
+drop alias if exists pg_catalog.pg_get_indexdef;
+create alias pg_catalog.pg_get_indexdef for "org.h2.server.pg.PgServer.getIndexColumn";
+
+drop alias if exists pg_catalog.pg_get_expr;
+create alias pg_catalog.pg_get_expr for "org.h2.server.pg.PgServer.getPgExpr";
+
 drop alias if exists version;
 create alias version for "org.h2.server.pg.PgServer.getVersion";