ddl-manager/dist/cache/trigger-builder/body/util/reassignVariables.js

store postgres procedures and triggers in files

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.reassignVariables = void 0;
const ast_1 = require("../../../../ast");
const assignCombinedJoinVariables_1 = require("./assignCombinedJoinVariables");
const groupJoinsByTableAndFilter_1 = require("./groupJoinsByTableAndFilter");
const replaceTableToVariableOrRow_1 = require("./replaceTableToVariableOrRow");
function reassignVariables(newJoins, oldJoins) {
    const lines = [];
    const oldCombinedJoins = groupJoinsByTableAndFilter_1.groupJoinsByTableAndFilter(oldJoins);
    const newCombinedJoins = groupJoinsByTableAndFilter_1.groupJoinsByTableAndFilter(newJoins);
    for (let i = 0, n = newCombinedJoins.length; i < n; i++) {
        const newCombinedJoin = newCombinedJoins[i];
        const oldCombinedJoin = oldCombinedJoins[i];
        const newByColumn = replaceTableToVariableOrRow_1.replaceTableToVariableOrRow(newCombinedJoin.byColumn, newJoins, "new");
        const oldByColumn = replaceTableToVariableOrRow_1.replaceTableToVariableOrRow(oldCombinedJoin.byColumn, oldJoins, "old");
        lines.push(new ast_1.If({
            if: ast_1.Expression.and([
                newByColumn + " is not distinct from " + oldByColumn
            ]),
            then: newCombinedJoin.variables.map((newVarName, j) => new ast_1.AssignVariable({
                variable: newVarName,
                value: new ast_1.HardCode({
                    sql: oldCombinedJoin.variables[j]
                })
            })),
            else: [
                new ast_1.If({
                    if: ast_1.Expression.and([
                        `${newByColumn} is not null`
                    ]),
                    then: assignCombinedJoinVariables_1.assignCombinedJoinVariables(newCombinedJoin, newJoins, "new")
                })
            ]
        }));
        lines.push(new ast_1.BlankLine());
    }
    return lines;
}
exports.reassignVariables = reassignVariables;
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