sea_query/backend/sqlite/
index.rs

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use super::*;

impl IndexBuilder for SqliteQueryBuilder {
    fn prepare_index_create_statement(
        &self,
        create: &IndexCreateStatement,
        sql: &mut dyn SqlWriter,
    ) {
        write!(sql, "CREATE ").unwrap();
        self.prepare_index_prefix(create, sql);
        write!(sql, "INDEX ").unwrap();

        if create.if_not_exists {
            write!(sql, "IF NOT EXISTS ").unwrap();
        }

        if let Some(name) = &create.index.name {
            write!(
                sql,
                "{}{}{}",
                self.quote().left(),
                name,
                self.quote().right()
            )
            .unwrap();
        }

        write!(sql, " ON ").unwrap();
        if let Some(table) = &create.table {
            self.prepare_table_ref_index_stmt(table, sql);
        }

        write!(sql, " ").unwrap();
        self.prepare_index_columns(&create.index.columns, sql);
        self.prepare_filter(&create.r#where, sql);
    }

    fn prepare_table_ref_index_stmt(&self, table_ref: &TableRef, sql: &mut dyn SqlWriter) {
        match table_ref {
            TableRef::Table(_) => self.prepare_table_ref_iden(table_ref, sql),
            _ => panic!("Not supported"),
        }
    }

    fn prepare_index_drop_statement(&self, drop: &IndexDropStatement, sql: &mut dyn SqlWriter) {
        write!(sql, "DROP INDEX ").unwrap();

        if drop.if_exists {
            write!(sql, "IF EXISTS ").unwrap();
        }

        if let Some(name) = &drop.index.name {
            write!(
                sql,
                "{}{}{}",
                self.quote().left(),
                name,
                self.quote().right()
            )
            .unwrap();
        }
    }

    fn prepare_index_prefix(&self, create: &IndexCreateStatement, sql: &mut dyn SqlWriter) {
        if create.primary {
            write!(sql, "PRIMARY KEY ").unwrap();
        } else if create.unique {
            write!(sql, "UNIQUE ").unwrap();
        }
    }

    fn write_column_index_prefix(&self, _col_prefix: &Option<u32>, _sql: &mut dyn SqlWriter) {}

    fn prepare_filter(&self, condition: &ConditionHolder, sql: &mut dyn SqlWriter) {
        self.prepare_condition(condition, "WHERE", sql);
    }
}