has anyone had any luck creating dynamic columns in mysql
what I'm trying to do is for sql to check and see if a column missing, if it is then i want sql to create the column. I've done several attempts with no luck. the alter table add column sql works but it fails when i add it to the if condition.
any thoughts?
CREATE PROCEDURE addcol() BEGIN
IF NOT EXISTS(
SELECT * FROM information_schema.COLUMNS
WHERE COLUMN_NAME="new_column" AND TABLE_NAME="transform_data_1"
)
THEN
ALTER TABLE `transform_data_1`
ADD COLUMN `type` INT NOT NULL
END IF
//
CALL addcol();
DROP PROCEDURE addcol;
Comments
-
@BeastMode since you're asking a mysql question, stack overflow would probably be your best bet.
but... let's close the loop here. why you trying to dynamically add 'missing columns'?
how are you defining what's 'missing'?
buuuut before we even address that question.
if i had to quess you're trying to union multiple datasets together with different schemas.
if that's the case, you'll get faster performance doing a UNION operation using Magic 2.0
Jae Wilson
Check out my 🎥 Domo Training YouTube Channel 👨💻
**Say "Thanks" by clicking the ❤️ in the post that helped you.
**Please mark the post that solves your problem by clicking on "Accept as Solution"1
Categories
- All Categories
- 1.7K Product Ideas
- 1.7K Ideas Exchange
- 1.5K Connect
- 1.2K Connectors
- 292 Workbench
- 4 Cloud Amplifier
- 8 Federated
- 2.8K Transform
- 95 SQL DataFlows
- 602 Datasets
- 2.1K Magic ETL
- 3.7K Visualize
- 2.4K Charting
- 695 Beast Mode
- 43 App Studio
- 39 Variables
- 658 Automate
- 170 Apps
- 441 APIs & Domo Developer
- 42 Workflows
- 5 DomoAI
- 32 Predict
- 12 Jupyter Workspaces
- 20 R & Python Tiles
- 386 Distribute
- 111 Domo Everywhere
- 269 Scheduled Reports
- 6 Software Integrations
- 113 Manage
- 110 Governance & Security
- 8 Domo University
- 30 Product Releases
- Community Forums
- 39 Getting Started
- 29 Community Member Introductions
- 98 Community Announcements
- Domo Community Gallery
- 4.8K Archive