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expr.js
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82 lines (74 loc) · 2.54 KB
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'use strict';
const { expect } = require('chai');
const { Parser } = require('../../');
describe('expressions', () => {
const parser = new Parser();
describe('function', () => {
it('should parse functions', () => {
const ast = parser.parse('SELECT fun(d) FROM t');
expect(ast.columns).to.eql([
{
expr: {
type: 'function',
name: 'fun',
args: {
type: 'expr_list',
value: [{ type: 'column_ref', table: null, column: 'd' }]
}
},
as: null
}
]);
});
['year', 'month', 'day', 'hour', 'minute'].forEach((fn) => {
it(`should parse ${fn} date function expression`, () => {
const ast = parser.parse(`SELECT ${fn}(NOW()) FROM dual`);
expect(ast.columns).to.eql([
{
expr: {
type: 'function',
name: fn.toUpperCase(),
args: {
type: 'expr_list',
value: [
{
type: 'function',
name: 'NOW',
args: { type: 'expr_list', value: [] }
}
]
}
},
as: null
}
]);
});
});
[
'CURRENT_DATE',
'CURRENT_TIME',
'CURRENT_TIMESTAMP',
'CURRENT_USER',
'SESSION_USER',
'USER',
'SYSTEM_USER'
].forEach((func) => {
it(`should parse scalar function ${func}`, () => {
const ast = parser.parse(`SELECT ${func} FROM t`);
expect(ast.columns).to.eql([
{
expr: {
type: 'function',
name: func,
args: {
type: 'expr_list',
value: []
}
},
as: null
}
]);
});
});
});
});