@sqlsmith/core/dist/processors/create-view-processor.js

Core SQL schema merging engine with dependency resolution

export class CreateViewProcessor {
    getHandledTypes() {
        return ['view'];
    }
    canProcess(statement) {
        return statement?.type === 'create' && statement?.keyword === 'view';
    }
    /**
     * Extracts view statements from the given AST.
     */
    extractStatements(ast, filePath, dialect) {
        const statements = [];
        const astArray = Array.isArray(ast) ? ast : [ast];
        for (const statement of astArray) {
            if (this.canProcess(statement)) {
                // TODO: The Create type from node-sql-parser doesn't have a 'view'
                // property. Using 'any' for now.
                const viewName = statement.view;
                if (viewName) {
                    const dependencies = this.#extractViewDependencies(statement);
                    statements.push({
                        type: 'view',
                        name: viewName,
                        dependsOn: dependencies,
                        filePath,
                        content: '', // Will be filled by the file parser
                        ast: statement,
                    });
                }
            }
        }
        return statements;
    }
    #extractViewDependencies(statement) {
        const dependencies = [];
        // TODO: The Create type from node-sql-parser doesn't have a 'definition'
        // property for views. Using 'any' for now.
        const definition = statement.definition;
        if (definition) {
            const selectStatement = definition;
            const tables = this.#extractTableReferencesFromSelect(selectStatement);
            for (const table of tables) {
                dependencies.push({
                    name: table,
                    type: 'table',
                });
            }
        }
        return dependencies;
    }
    #extractTableReferencesFromSelect(selectStatement) {
        const tables = [];
        if (selectStatement.from && Array.isArray(selectStatement.from)) {
            for (const from of selectStatement.from) {
                if ('table' in from && from.table) {
                    tables.push(from.table);
                }
            }
        }
        return tables;
    }
}
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