import { Alias } from "./Alias";
import { BaseNode, Keyword } from "./Base";
import { Expr, Identifier, ListExpr, ParenExpr, EntityName } from "./Expr";
import { DefaultValues, OverridingClause, ValuesClause } from "./Insert";
import { IntoVariablesClause, ReturningClause } from "./OtherClauses";
import { SelectStmt, WithClause } from "./Select";
import { SetClause } from "./Update";
export type AllMergeNodes = MergeStmt | MergeClause | MergeWhenClause | MergeWhenCondition | MergeActionDoNothing | MergeActionDelete | MergeActionUpdate | MergeActionInsert | MergeActionInsertRowClause;
export interface MergeStmt extends BaseNode {
    type: "merge_stmt";
    clauses: (WithClause | MergeClause | MergeWhenClause | ReturningClause | IntoVariablesClause)[];
}
export interface MergeClause extends BaseNode {
    type: "merge_clause";
    mergeKw: Keyword<"MERGE">;
    intoKw: Keyword<"INTO">;
    target: EntityName | Alias<EntityName>;
    usingKw: Keyword<"USING">;
    source: EntityName | ParenExpr<SelectStmt> | Alias<EntityName | ParenExpr<SelectStmt>>;
    onKw: Keyword<"ON">;
    condition: Expr;
}
export interface MergeWhenClause extends BaseNode {
    type: "merge_when_clause";
    whenKw: Keyword<"WHEN">;
    matchedKw: Keyword<"MATCHED"> | [Keyword<"NOT">, Keyword<"MATCHED">];
    byKw?: [Keyword<"BY">, Keyword<"TARGET">] | [Keyword<"BY">, Keyword<"SOURCE">];
    condition?: MergeWhenCondition;
    thenKw: Keyword<"THEN">;
    action: MergeActionDoNothing | MergeActionDelete | MergeActionUpdate | MergeActionInsert;
}
export interface MergeWhenCondition extends BaseNode {
    type: "merge_when_condition";
    andKw: Keyword<"AND">;
    expr: Expr;
}
export interface MergeActionDoNothing extends BaseNode {
    type: "merge_action_do_nothing";
    doNothingKw: [Keyword<"DO">, Keyword<"NOTHING">];
}
export interface MergeActionDelete extends BaseNode {
    type: "merge_action_delete";
    deleteKw: Keyword<"DELETE">;
}
export interface MergeActionUpdate extends BaseNode {
    type: "merge_action_update";
    updateKw: Keyword<"UPDATE">;
    set: SetClause;
}
export interface MergeActionInsert extends BaseNode {
    type: "merge_action_insert";
    insertKw: Keyword<"INSERT">;
    columns?: ParenExpr<ListExpr<Identifier>>;
    clauses: (OverridingClause | ValuesClause | DefaultValues | MergeActionInsertRowClause)[];
}
export interface MergeActionInsertRowClause extends BaseNode {
    type: "merge_action_insert_row_clause";
    rowKw: Keyword<"ROW">;
}