| 11/27/2022 | Creating Multiple Row Headers with ExcelGen PL/SQL Spreadsheet Generator |
| ExcelGen prior to version 3 was limited to single row column headers and a single query per worksheet. Now we can create multi-row column headers and title banners. Walking through an example. |
| 11/24/2022 | Create a PL/SQL Cursor from a Nested Table of Nested Tables |
| A two dimensional data structure in PL/SQL is most commonly a nested table of record types. For a generic capability of unknown record content or length we need a nested table (rows) of nested tables (columns) structure. Binding such a structure to SQL as a table to extract columns and rows is tricky. |
| 11/13/2022 | Versioning Oracle Code from Open Source |
| When Open Source code is already deployed and in use by many production jobs, but you want to implement the latest release, consider adding version identifiers to the object names. |
| 10/09/2022 | Tuning Query with OR Conditions in a NOT EXISTS |
| When tuning a query you sometimes run into uncommon problems that do not respond to the bag of tricks you brought to the game like hints and small rewrites. We know that 'OR' conditions can't be hash joined and have seen the optimizer join twice with a 'CONCATENATION'. It doesn't do that for 'anti-joins', so you may have to do something counter intuitive. |
| 09/18/2022 | Manipulating XLSX Spreadsheets in PL/SQL |
| Business users often embed their work processes in spreadsheets. A common use case involves data created and maintained by business users in a spreadsheet needing supplemental data from the database. We discuss a method of inputting their spreadsheet to Oracle and outputting it again with supplemental columns from queries while preserving their polymorphic column content. |
| 04/30/2022 | Using Perl DBD::Oracle to write LOB content |
| Writing large BLOB/CLOB content on a remote client machine can be done many ways. Let's do it with Perl. |
| 04/29/2022 | Syntax Highlighting for PL/SQL in vim |
| Becoming the 'maintainer' of the plsql syntax file for vim wasn't what I set out to do, but wimping out was not in the cards. Now I get the colors I like in vim. |
| 04/28/2022 | Installing Perl DBD::Oracle on RHL |
| Installing Perl DBD::Oracle has over the years been a heavy lift. It's still not a button push, but it has gotten better. |