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Syntax Highlighting
Syntax highlighting in the CLI is available for macOS, Linux and Windows.
SQL queries that are written in the shell are automatically highlighted using syntax highlighting.
There are several components of a query that are highlighted in different colors. The colors can be configured using the .highlight_colors dot command:
Syntax highlighting can also be disabled entirely using the .highlight off command.
Below is a list of query components that can be configured.
| Type | Component | Default color |
|---|---|---|
| Keywords | keyword |
green |
| Numeric constants | numeric_constant |
yellow |
| String constants | string_constant |
yellow |
| Comments | comment |
gray |
| Errors | error |
red |
| Continuation | continuation |
gray |
| Continuation (Selected) | continuation_selected |
green |
Colors are specified by name. The following basic colors are supported by all terminals:
black, red, green, yellow, blue, magenta, cyan, brightgray, gray, brightred, brightgreen, brightyellow, brightblue, brightmagenta, brightcyan, white
In addition, 8-bit colors can be used. Run .display_colors to list all available color names, see 8-Bit Colors.
The optional intensity can be standard, bold, underline or bold_underline.
For example, here is an alternative set of syntax highlighting colors:
.highlight_colors keyword brightred bold
.highlight_colors numeric_constant white
.highlight_colors string_constant white
.highlight_colors comment cyan
.highlight_colors error yellow
.highlight_colors continuation blue
.highlight_colors continuation_selected brightblue
If you wish to start up the CLI with a different set of colors every time, you can place these commands in the ~/.duckdbrc file that is loaded on start-up of the CLI.
Error Highlighting
The shell has support for highlighting certain errors. In particular, mismatched brackets and unclosed quotes are highlighted in red (or another color if specified). This highlighting is automatically disabled for large queries. In addition, it can be disabled manually using the .render_errors off command.
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