velesdb_core/velesql/ast/
join.rs

1//! JOIN clause types for VelesQL.
2//!
3//! This module defines join types and conditions for cross-store queries.
4
5use serde::{Deserialize, Serialize};
6
7/// JOIN clause for cross-store queries (EPIC-031 US-004).
8#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
9pub struct JoinClause {
10    /// Type of join (INNER, LEFT, RIGHT, FULL).
11    pub join_type: JoinType,
12    /// Table/store name to join.
13    pub table: String,
14    /// Optional alias for the joined table.
15    pub alias: Option<String>,
16    /// Join condition (ON clause).
17    pub condition: Option<JoinCondition>,
18    /// USING clause columns.
19    pub using_columns: Option<Vec<String>>,
20}
21
22/// Type of SQL JOIN operation.
23#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
24#[non_exhaustive]
25pub enum JoinType {
26    /// INNER JOIN.
27    #[default]
28    Inner,
29    /// LEFT JOIN.
30    Left,
31    /// RIGHT JOIN.
32    Right,
33    /// FULL JOIN.
34    Full,
35}
36
37/// Join condition specifying how to link tables.
38#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
39pub struct JoinCondition {
40    /// Left side of the join.
41    pub left: ColumnRef,
42    /// Right side of the join.
43    pub right: ColumnRef,
44}
45
46/// Column reference with optional table/alias prefix.
47#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
48pub struct ColumnRef {
49    /// Optional table or alias prefix.
50    pub table: Option<String>,
51    /// Column or property name.
52    pub column: String,
53}
velesdb_core/velesql/ast/join.rs

velesdb_core/velesql/ast/
join.rs
