31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# Troubleshooting Microsoft SQL Server (MSSQL) Sources
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## Connector Limitations
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### Adding columns to existing tables with CDC
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When working with source SQL Server (MSSQL) in CDC mode, Making alteration to a table such as `ALTER TABLE <table> ADD <column>` will not automatically be reflected in the CDC stream.
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The easiest way of making CDC match the new structure of a table. You can disable and re-enable CDC on the table. This will create a new capture instance for the table with the new structure:
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1. Disabling CDC on the table:
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```sql
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EXEC sys.sp_cdc_disable_table
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@source_schema = N'<schema>',
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@source_name = N'<table>',
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@capture_instance = N'<capture instance (typically schema_table)>'
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```
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2. Enabling CDC on the table:
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```sql
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EXEC sys.sp_cdc_enable_table
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@source_schema = N'<schema>',
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@source_name = N'<table>',
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@role_name = NULL
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```
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Note: You may want to set a `@role_name` or any other arguments similarly to how they were set when CDC was enabled in the first place.
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You can validate which columns are being captured by running the following query:
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```sql
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EXEC sys.sp_cdc_get_captured_columns
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@capture_instance = N'<capture instance (typically schema_table)>';
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```
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