From 76a6da8a1b01e23091da65f5e167d67f5274d740 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Fri, 24 Aug 2001 16:50:18 +0000
Subject: Attached is a patch to fix the current issues with building under
 jdbc1.   This patch moves the logic that looks up TypeOid, PGTypeName, and
 SQLTypeName from Field to Connection.  It is moved to connection since it
 needs to differ from the jdbc1 to jdbc2 versions and Connection already has
 different subclasses for the two driver versions.  It also made sense to move
 the logic to Connection as some of the logic was already there anyway.

Barry Lind
---
 src/interfaces/jdbc/org/postgresql/Field.java | 147 +++++---------------------
 1 file changed, 26 insertions(+), 121 deletions(-)

(limited to 'src/interfaces/jdbc/org/postgresql/Field.java')

diff --git a/src/interfaces/jdbc/org/postgresql/Field.java b/src/interfaces/jdbc/org/postgresql/Field.java
index 8b4dcb868e4..1bbc272aa80 100644
--- a/src/interfaces/jdbc/org/postgresql/Field.java
+++ b/src/interfaces/jdbc/org/postgresql/Field.java
@@ -12,17 +12,13 @@ import org.postgresql.util.*;
  */
 public class Field
 {
-  public int length;		// Internal Length of this field
-  public int oid;		// OID of the type
-  public int mod;		// type modifier of this field
-  public String name;		// Name of this field
+  private int length;		// Internal Length of this field
+  private int oid;		// OID of the type
+  private int mod;		// type modifier of this field
+  private String name;		// Name of this field
 
-  protected Connection conn;	// Connection Instantation
+  private Connection conn;	// Connection Instantation
 
-  public int sql_type = -1;	// The entry in java.sql.Types for this field
-  public String type_name = null;// The sql type name
-
-  private static Hashtable oidCache = new Hashtable();
 
   /**
    * Construct a field based on the information fed to it.
@@ -63,140 +59,49 @@ public class Field
   }
 
   /**
-   * the ResultSet and ResultMetaData both need to handle the SQL
-   * type, which is gained from another query.  Note that we cannot
-   * use getObject() in this, since getObject uses getSQLType().
-   *
-   * @return the entry in Types that refers to this field
-   * @exception SQLException if a database access error occurs
+   * @return the mod of this Field's data type
    */
-  public int getSQLType() throws SQLException
+  public int getMod()
   {
-    if(sql_type == -1) {
-      type_name = (String)conn.fieldCache.get(new Integer(oid));
-
-      // it's not in the cache, so perform a query, and add the result to
-      // the cache
-      if(type_name==null) {
-	ResultSet result = (org.postgresql.ResultSet)conn.ExecSQL("select typname from pg_type where oid = " + oid);
-	if (result.getColumnCount() != 1 || result.getTupleCount() != 1)
-	  throw new PSQLException("postgresql.unexpected");
-	result.next();
-	type_name = result.getString(1);
-	conn.fieldCache.put(new Integer(oid),type_name);
-	result.close();
-      }
-
-      sql_type = getSQLType(type_name);
-    }
-    return sql_type;
+    return mod;
   }
 
   /**
-   * This returns the SQL type. It is called by the Field and DatabaseMetaData classes
-   * @param type_name PostgreSQL type name
-   * @return java.sql.Types value for oid
+   * @return the name of this Field's data type
    */
-  public static int getSQLType(String type_name)
+  public String getName()
   {
-    int sql_type = Types.OTHER; // default value
-    for(int i=0;i<types.length;i++)
-      if(type_name.equals(types[i]))
-	sql_type=typei[i];
-    return sql_type;
+    return name;
   }
 
   /**
-   * This returns the oid for a field of a given data type
-   * @param type_name PostgreSQL type name
-   * @return PostgreSQL oid value for a field of this type
+   * @return the length of this Field's data type
    */
-  public int getOID( String type_name ) throws SQLException
+  public int getLength()
   {
-	int oid = -1;
-	if(type_name != null) {
-		Integer oidValue = (Integer) oidCache.get( type_name );
-		if( oidValue != null ) 
-			oid = oidValue.intValue();
-		else {
-			// it's not in the cache, so perform a query, and add the result to the cache
-			ResultSet result = (org.postgresql.ResultSet)conn.ExecSQL("select oid from pg_type where typname='" 
-				+ type_name + "'");
-			if (result.getColumnCount() != 1 || result.getTupleCount() != 1)
-				throw new PSQLException("postgresql.unexpected");
-			result.next();
-			oid = Integer.parseInt(result.getString(1));
-			oidCache.put( type_name, new Integer(oid) );
-			result.close();
-		}
-	}
-	return oid;
+    return length;
   }
 
   /**
-   * This table holds the org.postgresql names for the types supported.
-   * Any types that map to Types.OTHER (eg POINT) don't go into this table.
-   * They default automatically to Types.OTHER
-   *
-   * Note: This must be in the same order as below.
-   *
-   * Tip: keep these grouped together by the Types. value
-   */
-  private static final String types[] = {
-    "int2",
-    "int4","oid",
-    "int8",
-    "cash","money",
-    "numeric",
-    "float4",
-    "float8",
-    "bpchar","char","char2","char4","char8","char16",
-    "varchar","text","name","filename",
-    "bool",
-    "date",
-    "time",
-    "abstime","timestamp",
-	"_bool", "_char", "_int2", "_int4", "_text", "_oid", "_varchar", "_int8",
-	"_float4", "_float8", "_abstime", "_date", "_time", "_timestamp", "_numeric"
-  };
-
-  /**
-   * This table holds the JDBC type for each entry above.
+   * We also need to get the PG type name as returned by the back end.
    *
-   * Note: This must be in the same order as above
-   *
-   * Tip: keep these grouped together by the Types. value
+   * @return the String representation of the PG type of this field
+   * @exception SQLException if a database access error occurs
    */
-  private static final int typei[] = {
-    Types.SMALLINT,
-    Types.INTEGER,Types.INTEGER,
-    Types.BIGINT,
-    Types.DOUBLE,Types.DOUBLE,
-    Types.NUMERIC,
-    Types.REAL,
-    Types.DOUBLE,
-    Types.CHAR,Types.CHAR,Types.CHAR,Types.CHAR,Types.CHAR,Types.CHAR,
-    Types.VARCHAR,Types.VARCHAR,Types.VARCHAR,Types.VARCHAR,
-    Types.BIT,
-    Types.DATE,
-    Types.TIME,
-    Types.TIMESTAMP,Types.TIMESTAMP,
-	Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY,
-	Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY, Types.ARRAY
-  };
+  public String getPGType() throws SQLException
+  {
+    return conn.getPGType(oid);
+  }
 
   /**
-   * We also need to get the type name as returned by the back end.
-   * This is held in type_name AFTER a call to getSQLType.  Since
-   * we get this information within getSQLType (if it isn't already
-   * done), we can just call getSQLType and throw away the result.
+   * We also need to get the java.sql.types type.
    *
-   * @return the String representation of the type of this field
+   * @return the int representation of the java.sql.types type of this field
    * @exception SQLException if a database access error occurs
    */
-  public String getTypeName() throws SQLException
+  public int getSQLType() throws SQLException
   {
-    int sql = getSQLType();
-    return type_name;
+    return conn.getSQLType(oid);
   }
+
 }
-- 
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