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Jun 23, 2025
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meta setup #158

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1,233 changes: 1,233 additions & 0 deletions packages/proto-parser/__tests__/__snapshots__/meta.test.ts.snap
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371 changes: 350 additions & 21 deletions packages/proto-parser/__tests__/meta.test.ts
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Original file line number Diff line number Diff line change
@@ -1,18 +1,19 @@
import ast from '../test-utils/utils/asts';
import * as t from '../test-utils/meta';
import { SelectStmt } from '@pgsql/types';
import { generateTsAstCodeFromPgAst } from '../src/utils'
import generate from '@babel/generator';

it('AST to AST to create AST — meta 🤯', () => {
const selectStmt = ast.selectStmt({
const selectStmt = t.nodes.selectStmt({
targetList: [
ast.resTarget({
val: ast.columnRef({
fields: [ast.aStar()]
t.nodes.resTarget({
val: t.nodes.columnRef({
fields: [t.nodes.aStar()]
})
})
],
fromClause: [
ast.rangeVar({
t.nodes.rangeVar({
relname: 'some_amazing_table',
inh: true,
relpersistence: 'p'
Expand All @@ -26,20 +27,348 @@ it('AST to AST to create AST — meta 🤯', () => {

const astForAst = generateTsAstCodeFromPgAst(selectStmt);
expect(generate(astForAst).code).toMatchSnapshot();
expect(generate(astForAst).code).toEqual(
`ast.selectStmt({
targetList: [ast.resTarget({
val: ast.columnRef({
fields: [ast.aStar({})]
})
})],
fromClause: [ast.rangeVar({
relname: "some_amazing_table",
inh: true,
relpersistence: "p"
})],
limitOption: "LIMIT_OPTION_DEFAULT",
op: "SETOP_NONE"
})`);
});

it('Complex AST — Advanced SQL with CTEs, Window Functions, Joins, and Subqueries', () => {
const complexSelectStmt: { SelectStmt: SelectStmt } = t.nodes.selectStmt({
// WITH clause for CTEs
withClause: t.ast.withClause({
ctes: [
// First CTE: Sales summary
t.nodes.commonTableExpr({
ctename: 'sales_summary',
ctequery: t.nodes.selectStmt({
targetList: [
t.nodes.resTarget({
name: 'customer_id',
val: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'customer_id' })]
})
}),
t.nodes.resTarget({
name: 'total_sales',
val: t.nodes.funcCall({
funcname: [t.nodes.string({ sval: 'sum' })],
args: [
t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'amount' })]
})
]
})
}),
t.nodes.resTarget({
name: 'avg_order_value',
val: t.nodes.funcCall({
funcname: [t.nodes.string({ sval: 'avg' })],
args: [
t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'amount' })]
})
]
})
})
],
fromClause: [
t.nodes.rangeVar({
relname: 'orders',
inh: true,
relpersistence: 'p'
})
],
whereClause: t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '>=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'order_date' })]
}),
rexpr: t.nodes.aConst({
sval: t.ast.string({ sval: '2023-01-01' })
})
}),
groupClause: [
t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'customer_id' })]
})
],
limitOption: 'LIMIT_OPTION_DEFAULT',
op: 'SETOP_NONE'
})
}),
t.nodes.commonTableExpr({
ctename: 'customer_rankings',
ctequery: t.nodes.selectStmt({
targetList: [
t.nodes.resTarget({
name: 'customer_id',
val: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'customer_id' })]
})
}),
t.nodes.resTarget({
name: 'total_sales',
val: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'total_sales' })]
})
}),
t.nodes.resTarget({
name: 'sales_rank',
val: t.nodes.windowFunc({
winfnoid: 3133, // ROW_NUMBER function OID
wintype: 20, // INT8 type
args: [],
winref: 1,
winstar: false,
winagg: false
})
}),
t.nodes.resTarget({
name: 'sales_percentile',
val: t.nodes.windowFunc({
winfnoid: 3974, // PERCENT_RANK function OID
wintype: 701, // FLOAT8 type
args: [],
winref: 2,
winstar: false,
winagg: false
})
})
],
fromClause: [
t.nodes.rangeVar({
relname: 'sales_summary',
inh: true,
relpersistence: 'p'
})
],
windowClause: [
t.nodes.windowDef({
name: 'sales_window',
orderClause: [
t.nodes.sortBy({
node: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'total_sales' })]
}),
sortby_dir: 'SORTBY_DESC',
sortby_nulls: 'SORTBY_NULLS_DEFAULT'
})
]
})
],
limitOption: 'LIMIT_OPTION_DEFAULT',
op: 'SETOP_NONE'
})
})
],
recursive: false
}),

// Main SELECT target list with complex expressions
targetList: [
t.nodes.resTarget({
name: 'customer_name',
val: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'c' }), t.nodes.string({ sval: 'name' })]
})
}),
t.nodes.resTarget({
name: 'total_sales',
val: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'total_sales' })]
})
}),
t.nodes.resTarget({
name: 'sales_rank',
val: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'sales_rank' })]
})
}),
t.nodes.resTarget({
name: 'customer_tier',
val: t.nodes.caseExpr({
args: [
t.nodes.caseWhen({
expr: t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '<=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'sales_rank' })]
}),
rexpr: t.nodes.aConst({
ival: t.ast.integer({ ival: 10 })
})
}),
result: t.nodes.aConst({
sval: t.ast.string({ sval: 'Premium' })
})
}),
t.nodes.caseWhen({
expr: t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '<=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'sales_rank' })]
}),
rexpr: t.nodes.aConst({
ival: t.ast.integer({ ival: 50 })
})
}),
result: t.nodes.aConst({
sval: t.ast.string({ sval: 'Gold' })
})
}),
t.nodes.caseWhen({
expr: t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '<=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'sales_rank' })]
}),
rexpr: t.nodes.aConst({
ival: t.ast.integer({ ival: 100 })
})
}),
result: t.nodes.aConst({
sval: t.ast.string({ sval: 'Silver' })
})
})
],
defresult: t.nodes.aConst({
sval: t.ast.string({ sval: 'Bronze' })
})
})
}),
t.nodes.resTarget({
name: 'recent_order_count',
val: t.nodes.subLink({
subLinkType: 'EXPR_SUBLINK',
subselect: t.nodes.selectStmt({
targetList: [
t.nodes.resTarget({
val: t.nodes.funcCall({
funcname: [t.nodes.string({ sval: 'count' })],
args: [t.nodes.aStar()]
})
})
],
fromClause: [
t.nodes.rangeVar({
relname: 'orders',
alias: t.ast.alias({ aliasname: 'o2' }),
inh: true,
relpersistence: 'p'
})
],
whereClause: t.nodes.boolExpr({
boolop: 'AND_EXPR',
args: [
t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'o2' }), t.nodes.string({ sval: 'customer_id' })]
}),
rexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'c' }), t.nodes.string({ sval: 'id' })]
})
}),
t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '>=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'o2' }), t.nodes.string({ sval: 'order_date' })]
}),
rexpr: t.nodes.funcCall({
funcname: [t.nodes.string({ sval: 'current_date' })],
args: []
})
})
]
}),
limitOption: 'LIMIT_OPTION_DEFAULT',
op: 'SETOP_NONE'
})
})
})
],

// Complex FROM clause with joins
fromClause: [
t.nodes.joinExpr({
jointype: 'JOIN_INNER',
larg: t.nodes.rangeVar({
relname: 'customers',
alias: t.ast.alias({ aliasname: 'c' }),
inh: true,
relpersistence: 'p'
}),
rarg: t.nodes.rangeVar({
relname: 'customer_rankings',
alias: t.ast.alias({ aliasname: 'cr' }),
inh: true,
relpersistence: 'p'
}),
quals: t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '=' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'c' }), t.nodes.string({ sval: 'id' })]
}),
rexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'customer_id' })]
})
})
})
],

// WHERE clause with complex conditions
whereClause: t.nodes.boolExpr({
boolop: 'AND_EXPR',
args: [
t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: '>' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'total_sales' })]
}),
rexpr: t.nodes.aConst({
ival: t.ast.integer({ ival: 1000 })
})
}),
t.nodes.aExpr({
kind: 'AEXPR_OP',
name: [t.nodes.string({ sval: 'IS NOT' })],
lexpr: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'c' }), t.nodes.string({ sval: 'status' })]
}),
rexpr: t.nodes.aConst({
sval: t.ast.string({ sval: 'inactive' })
})
})
]
}),

// ORDER BY clause
sortClause: [
t.nodes.sortBy({
node: t.nodes.columnRef({
fields: [t.nodes.string({ sval: 'cr' }), t.nodes.string({ sval: 'sales_rank' })]
}),
sortby_dir: 'SORTBY_ASC',
sortby_nulls: 'SORTBY_NULLS_DEFAULT'
})
],

// LIMIT clause
limitCount: t.nodes.aConst({
ival: t.ast.integer({ ival: 50 })
}),

limitOption: 'LIMIT_OPTION_COUNT',
op: 'SETOP_NONE'
});

expect(complexSelectStmt).toMatchSnapshot();

const astForComplexAst = generateTsAstCodeFromPgAst(complexSelectStmt);
expect(generate(astForComplexAst).code).toMatchSnapshot();
});
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