Query type changed by comment

[Rochet2]

In the code we execute two identical queries. One of them has a comment at the beginning.
Despite passing the type of the query, sequelize changes the type automatically based on the contents of the query:
https://github.com/sequelize/sequelize/blob/d047f3275a451df73294f222c8a2c99ffdd22299/src/dialects/abstract/query.js#L203-L204
This causes the query type to be different depending on if there is a comment at the beginning.
As a result, the return value is different.

Note that if the SQL starts with "insert into" it is considered to be an insert statement according to the code linked above.
However, this may not be true in case of an UPSERT in postgresql as that can do one of {insert, update, nothing} even if the statement starts with an "insert into".

Output:

2022-09-08T09:15:00.4952884Z -------------------------------------------------------------
2022-09-08T09:15:00.4962403Z ===== Running SSCCE for POSTGRES with Sequelize v6.21.4 =====
2022-09-08T09:15:00.4964965Z -------------------------------------------------------------
2022-09-08T09:15:00.4965478Z 
2022-09-08T09:15:01.3344971Z [Sequelize] Executed (default): DROP TABLE IF EXISTS "Foos" CASCADE; [Elapsed time: 1 ms] 
2022-09-08T09:15:01.3345657Z 
2022-09-08T09:15:01.3440592Z [Sequelize] Executed (default): SELECT DISTINCT tc.constraint_name as constraint_name, tc.constraint_schema as constraint_schema, tc.constraint_catalog as constraint_catalog, tc.table_name as table_name,tc.table_schema as table_schema,tc.table_catalog as table_catalog,tc.initially_deferred as initially_deferred,tc.is_deferrable as is_deferrable,kcu.column_name as column_name,ccu.table_schema  AS referenced_table_schema,ccu.table_catalog  AS referenced_table_catalog,ccu.table_name  AS referenced_table_name,ccu.column_name AS referenced_column_name FROM information_schema.table_constraints AS tc JOIN information_schema.key_column_usage AS kcu ON tc.constraint_name = kcu.constraint_name JOIN information_schema.constraint_column_usage AS ccu ON ccu.constraint_name = tc.constraint_name WHERE constraint_type = 'FOREIGN KEY' AND tc.table_name = 'Foos' AND tc.table_catalog = 'sequelize_test' [Elapsed time: 7 ms] 
2022-09-08T09:15:01.3446625Z 
2022-09-08T09:15:01.3446996Z [Sequelize] Executed (default): DROP TABLE IF EXISTS "Foos" CASCADE; [Elapsed time: 0 ms] 
2022-09-08T09:15:01.3447211Z 
2022-09-08T09:15:01.3455222Z [Sequelize] Executed (default): DROP TABLE IF EXISTS "Foos" CASCADE; [Elapsed time: 0 ms] 
2022-09-08T09:15:01.3455676Z 
2022-09-08T09:15:01.3515824Z [Sequelize] Executed (default): CREATE TABLE IF NOT EXISTS "Foos" ("id"  SERIAL , "name" TEXT, PRIMARY KEY ("id")); [Elapsed time: 4 ms] 
2022-09-08T09:15:01.3516314Z 
2022-09-08T09:15:01.3542905Z [Sequelize] Executed (default): SELECT i.relname AS name, ix.indisprimary AS primary, ix.indisunique AS unique, ix.indkey AS indkey, array_agg(a.attnum) as column_indexes, array_agg(a.attname) AS column_names, pg_get_indexdef(ix.indexrelid) AS definition FROM pg_class t, pg_class i, pg_index ix, pg_attribute a WHERE t.oid = ix.indrelid AND i.oid = ix.indexrelid AND a.attrelid = t.oid AND t.relkind = 'r' and t.relname = 'Foos' GROUP BY i.relname, ix.indexrelid, ix.indisprimary, ix.indisunique, ix.indkey ORDER BY i.relname; [Elapsed time: 2 ms] 
2022-09-08T09:15:01.3543855Z 
2022-09-08T09:15:01.3583938Z [Sequelize] Executed (default): INSERT INTO "Foos" (id, name)
2022-09-08T09:15:01.3584749Z       VALUES          (1, 'steve')
2022-09-08T09:15:01.3585208Z       ON CONFLICT (id) DO UPDATE
2022-09-08T09:15:01.3586560Z       SET name='steve'
2022-09-08T09:15:01.3589888Z       RETURNING id, name [Elapsed time: 1 ms] 
2022-09-08T09:15:01.3590264Z 
2022-09-08T09:15:01.3594011Z [Sequelize] Executed (default): -- HAX
2022-09-08T09:15:01.3594633Z       INSERT INTO "Foos" (id, name)
2022-09-08T09:15:01.3595097Z       VALUES          (1, 'steve')
2022-09-08T09:15:01.3595563Z       ON CONFLICT (id) DO UPDATE
2022-09-08T09:15:01.3693689Z       SET name='steve'
2022-09-08T09:15:01.3699063Z       RETURNING id, name [Elapsed time: 1 ms] 
2022-09-08T09:15:01.3702966Z 
2022-09-08T09:15:01.3705731Z [ [ { id: 1, name: 'steve' } ], 1 ] [ [ { id: 1, name: 'steve' } ],
2022-09-08T09:15:01.3708329Z   Result {
2022-09-08T09:15:01.3710771Z     command: 'INSERT',
2022-09-08T09:15:01.3713184Z     rowCount: 1,
2022-09-08T09:15:01.3715571Z     oid: 0,
2022-09-08T09:15:01.3717945Z     rows: [ [Object] ],
2022-09-08T09:15:01.3720389Z     fields: [ [Field], [Field] ],
2022-09-08T09:15:01.3722835Z     _parsers: [ [Function: parser], [Function: noParse] ],
2022-09-08T09:15:01.3725436Z     _types: TypeOverrides { _types: [Object], text: {}, binary: {} },
2022-09-08T09:15:01.3727873Z     RowCtor: null,
2022-09-08T09:15:01.3730232Z     rowAsArray: false } ]
2022-09-08T09:15:01.3732666Z Sequelize 6 test failed
2022-09-08T09:15:01.3735520Z { AssertionError: expected [ [ { id: 1, name: 'steve' } ], 1 ] to deeply equal [ [ { id: 1, name: 'steve' } ], …(1) ]
2022-09-08T09:15:01.3737291Z     at Proxy.assertEql (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai/lib/chai/core/assertions.js:1096:10)
2022-09-08T09:15:01.3739097Z     at Proxy.methodWrapper (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai/lib/chai/utils/addMethod.js:57:25)
2022-09-08T09:15:01.3740863Z     at doAsserterAsyncAndAddThen (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai-as-promised/lib/chai-as-promised.js:289:22)
2022-09-08T09:15:01.3742645Z     at Proxy.<anonymous> (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai-as-promised/lib/chai-as-promised.js:255:20)
2022-09-08T09:15:01.3744451Z     at Proxy.overwritingMethodWrapper (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai/lib/chai/utils/overwriteMethod.js:78:33)
2022-09-08T09:15:01.3746241Z     at Proxy.assertEqual (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai/lib/chai/core/assertions.js:1035:12)
2022-09-08T09:15:01.3747122Z     at Proxy.methodWrapper (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai/lib/chai/utils/addMethod.js:57:25)
2022-09-08T09:15:01.3748267Z     at doAsserterAsyncAndAddThen (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai-as-promised/lib/chai-as-promised.js:289:22)
2022-09-08T09:15:01.3752125Z     at Proxy.<anonymous> (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai-as-promised/lib/chai-as-promised.js:255:20)
2022-09-08T09:15:01.3753880Z     at Proxy.overwritingMethodWrapper (/home/runner/work/sequelize-sscce/sequelize-sscce/node_modules/chai/lib/chai/utils/overwriteMethod.js:78:33)
2022-09-08T09:15:01.3754379Z   message:
2022-09-08T09:15:01.3755100Z    'expected [ [ { id: 1, name: \'steve\' } ], 1 ] to deeply equal [ [ { id: 1, name: \'steve\' } ], …(1) ]',
2022-09-08T09:15:01.3758487Z   showDiff: true,
2022-09-08T09:15:01.3758895Z   actual: [ [ [Object] ], 1 ],
2022-09-08T09:15:01.3759310Z   expected:
2022-09-08T09:15:01.3761881Z    [ [ [Object] ],
2022-09-08T09:15:01.3762273Z      Result {
2022-09-08T09:15:01.3762680Z        command: 'INSERT',
2022-09-08T09:15:01.3765296Z        rowCount: 1,
2022-09-08T09:15:01.3765625Z        oid: 0,
2022-09-08T09:15:01.3765977Z        rows: [Array],
2022-09-08T09:15:01.3768532Z        fields: [Array],
2022-09-08T09:15:01.3768944Z        _parsers: [Array],
2022-09-08T09:15:01.3769416Z        _types: [TypeOverrides],
2022-09-08T09:15:01.3771841Z        RowCtor: null,
2022-09-08T09:15:01.3772225Z        rowAsArray: false } ],
2022-09-08T09:15:01.3774856Z   operator: 'deepStrictEqual' }