Update DROP COLUMN example to use transactions and rollback-able DROP TABLE>

diff --git a/doc/FAQ b/doc/FAQ
index 791cfbd9d3735b0e7ac075322e2fc66c32395632..2c4193a833d53f00823e4312155b78d3c7390760 100644 (file)
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -1,7 +1,7 @@
 
                 Frequently Asked Questions (FAQ) for PostgreSQL
                                        
-   Last updated: Thu Apr 18 00:44:51 EDT 2002
+   Last updated: Fri Apr 26 23:03:46 EDT 2002
    
    Current maintainer: Bruce Momjian ([email protected])
    
@@ -637,11 +637,14 @@
     4.4) How do you remove a column from a table?
     
    We do not support ALTER TABLE DROP COLUMN, but do this:
+    BEGIN;
+    LOCK TABLE old_table;
     SELECT ...  -- select all columns but the one you want to remove
     INTO TABLE new_table
     FROM old_table;
     DROP TABLE old_table;
     ALTER TABLE new_table RENAME TO old_table;
+    COMMIT;
 
     4.5) What is the maximum size for a row, a table, and a database?
     

diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html
index 8f0dbb11bbc828661f539987ef0b40b7338b0af3..988aa3f968f7ca070b6460cc854636afd8641d5b 100644 (file)
--- a/doc/src/FAQ/FAQ.html
+++ b/doc/src/FAQ/FAQ.html
@@ -14,7 +14,7 @@
   alink="#0000ff">
     Frequently Asked Questions (FAQ) for PostgreSQL
 
-    Last updated: Thu Apr 18 00:44:51 EDT 2002
+    Last updated: Fri Apr 26 23:03:46 EDT 2002
 
     Current maintainer: Bruce Momjian (
     "mailto:[email protected]">[email protected])
@@ -827,11 +827,14 @@
     We do not support ALTER TABLE DROP COLUMN, but do
     this:
 
+    BEGIN;
+    LOCK TABLE old_table;
     SELECT ...  -- select all columns but the one you want to remove
     INTO TABLE new_table
     FROM old_table;
     DROP TABLE old_table;
     ALTER TABLE new_table RENAME TO old_table;
+    COMMIT;
 
 
     4.5) What is the maximum size for a row, a