fn fmt()

in src/ast/ddl.rs [1731:1844]
112 lines of code
14 McCabe index (conditional complexity)

    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        use ColumnOption::*;
        match self {
            Null => write!(f, "NULL"),
            NotNull => write!(f, "NOT NULL"),
            Default(expr) => write!(f, "DEFAULT {expr}"),
            Materialized(expr) => write!(f, "MATERIALIZED {expr}"),
            Ephemeral(expr) => {
                if let Some(e) = expr {
                    write!(f, "EPHEMERAL {e}")
                } else {
                    write!(f, "EPHEMERAL")
                }
            }
            Alias(expr) => write!(f, "ALIAS {expr}"),
            Unique {
                is_primary,
                characteristics,
            } => {
                write!(f, "{}", if *is_primary { "PRIMARY KEY" } else { "UNIQUE" })?;
                if let Some(characteristics) = characteristics {
                    write!(f, " {}", characteristics)?;
                }
                Ok(())
            }
            ForeignKey {
                foreign_table,
                referred_columns,
                on_delete,
                on_update,
                characteristics,
            } => {
                write!(f, "REFERENCES {foreign_table}")?;
                if !referred_columns.is_empty() {
                    write!(f, " ({})", display_comma_separated(referred_columns))?;
                }
                if let Some(action) = on_delete {
                    write!(f, " ON DELETE {action}")?;
                }
                if let Some(action) = on_update {
                    write!(f, " ON UPDATE {action}")?;
                }
                if let Some(characteristics) = characteristics {
                    write!(f, " {}", characteristics)?;
                }
                Ok(())
            }
            Check(expr) => write!(f, "CHECK ({expr})"),
            DialectSpecific(val) => write!(f, "{}", display_separated(val, " ")),
            CharacterSet(n) => write!(f, "CHARACTER SET {n}"),
            Collation(n) => write!(f, "COLLATE {n}"),
            Comment(v) => write!(f, "COMMENT '{}'", escape_single_quote_string(v)),
            OnUpdate(expr) => write!(f, "ON UPDATE {expr}"),
            Generated {
                generated_as,
                sequence_options,
                generation_expr,
                generation_expr_mode,
                generated_keyword,
            } => {
                if let Some(expr) = generation_expr {
                    let modifier = match generation_expr_mode {
                        None => "",
                        Some(GeneratedExpressionMode::Virtual) => " VIRTUAL",
                        Some(GeneratedExpressionMode::Stored) => " STORED",
                    };
                    if *generated_keyword {
                        write!(f, "GENERATED ALWAYS AS ({expr}){modifier}")?;
                    } else {
                        write!(f, "AS ({expr}){modifier}")?;
                    }
                    Ok(())
                } else {
                    // Like Postgres - generated from sequence
                    let when = match generated_as {
                        GeneratedAs::Always => "ALWAYS",
                        GeneratedAs::ByDefault => "BY DEFAULT",
                        // ExpStored goes with an expression, handled above
                        GeneratedAs::ExpStored => unreachable!(),
                    };
                    write!(f, "GENERATED {when} AS IDENTITY")?;
                    if sequence_options.is_some() {
                        let so = sequence_options.as_ref().unwrap();
                        if !so.is_empty() {
                            write!(f, " (")?;
                        }
                        for sequence_option in so {
                            write!(f, "{sequence_option}")?;
                        }
                        if !so.is_empty() {
                            write!(f, " )")?;
                        }
                    }
                    Ok(())
                }
            }
            Options(options) => {
                write!(f, "OPTIONS({})", display_comma_separated(options))
            }
            Identity(parameters) => {
                write!(f, "{parameters}")
            }
            OnConflict(keyword) => {
                write!(f, "ON CONFLICT {:?}", keyword)?;
                Ok(())
            }
            Policy(parameters) => {
                write!(f, "{parameters}")
            }
            Tags(tags) => {
                write!(f, "{tags}")
            }
        }
    }