Fix CREATE INDEX to support qualified table names

[Copilot]

Description

CREATE INDEX failed with TypeError: undefined is not an object (evaluating 'table.inddefs') when using qualified table names (e.g., database.table). The parser already supported qualified names, but the execute function did not resolve the database correctly.

Changes

Modified src/65createindex.js:

• Changed database resolution to check this.table.databaseid || databaseid (line 23)
• Follows existing pattern from CREATE TABLE, DROP TABLE, and ALTER TABLE

Added test/test2184.js:

• Tests CREATE INDEX with qualified names without USE statement
• Tests CREATE UNIQUE INDEX with qualified names
• Tests REINDEX functionality

Example

-- Now works without USE statement
CREATE DATABASE mydb;
CREATE TABLE mydb.users (id INT, name STRING);
CREATE INDEX idx_id ON mydb.users (id);
CREATE UNIQUE INDEX idx_name ON mydb.users (name);

Checklist

• Tests added
• No regressions in existing tests
• Security scan passed

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Original prompt

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This section details on the original issue you should resolve

<issue_title>CREATE INDEX statement doesn't support qualified table names</issue_title>
<issue_description>The CREATE INDEX statement doesn't support qualified table names.

Error: "TypeError: undefined is not an object (evaluating 'table.inddefs')"

Workaround: Must use temporary USE statements

Root cause: Parser expects unqualified names and fails to resolve table object
</issue_description>

<agent_instructions>Please make a new test file named test2184.js that is a copy of test403.js and then replicate the problem by naming the table explicitly in create index. Like

CREATE INDEX xone ON test403.one (a);

you can run the test via yarn test test/test2184.js

If you need to edit the parser its in src/alasqlparser.jison and after editing (pleaes be very carefull) you need to run yarn jison &&. yarn test to test it. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes CREATE INDEX statement doesn't support qualified table names #2184

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