agent misread BigQuery INFORMATION_SCHEMA column types: date fields rendered as strings in Looker Studio chart

Not specified by the original author.

TL;DR

Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Start in the BigQuery job history, the query validator, and the quota page, work on one affected item, and prove the fix there before running the full set. Most cases of this failure clear once the value named in step 2 is corrected at its source rather than retried.

agent misread BigQuery INFORMATION_SCHEMA column types: date fields rendered as strings in Looker Studio chart

Use this when

• You see this exact message or symptom in BigQuery: agent misread BigQuery INFORMATION_SCHEMA column types: date fields rendered as strings in Looker Studio chart
• One run, record, build, or object is affected and you can name it
• A retry without changing anything reproduces the same text

Not for this skill when

• BigQuery fails with a different message and none of the signals here appear
• Nothing has failed yet and you are doing first time setup or general planning
• Every service from this vendor is down for all users, which is a vendor outage to wait out first

Steps

1. Reproduce the failure once in the BigQuery job history, the query validator, and the quota page and search the log or history for the exact text in the block above, recording the time, the workspace or project, and the one object it names. Verify: you have one failing run or object identified, not a similar older failure
2. Inspect the generated SQL, the dry run result, concurrent DML use on the target table, and the job error recorded in the log, and check the schema diff, the corrected field definition, and the validation run that now passes for the whole object. Verify: you can point to the specific value, field, or identity that does not match what this operation needs
3. Apply the fix at that source: diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Verify: the corrected value or setting is visible in BigQuery itself, not only in a local config file
4. Re-run the original operation on the single affected item first: run the query as a dry run first, fix what the validator names, then run it in a slot window outside board reporting. Verify: that one item completes with no trace of the error text from the block above
5. Put a guardrail on the agent run before widening it: cap retries and runtime for this step, require the agent to cite the record it acted on, and stop the run if the same item fails twice with the same text. Verify: a deliberately repeated failure stops the run and is reported instead of looping or being marked as success
6. Check the downstream result a user or the next job would see: the job completing in the history with rows written and the cohort table matching a hand-checked sample. Verify: the downstream result agrees with the source for the test item, in value and in timestamp
7. Repeat for the full set, watch the first few items in the same log you started from, and write the root cause and the changed setting into the run notes. Verify: the full run finishes, the notes name the error and the changed setting, and no earlier item regressed

Variant phrasings

agent misread BigQuery INFORMATION_SCHEMA column types: date fields rendered as strings in Looker Studio chart

The subject-first phrasing of the same failure. The fix is the same, start at step 1 and confirm the object the log names.

BigQuery version of this failure

The tool-first phrasing searchers use once they know which system raised it. It is the same underlying problem, not a separate bug.

Why does agent misread BigQuery INFORMATION_SCHEMA column types: date fields rendered as strings in Looker Studio chart keep happening after a retry

The repeat-occurrence phrasing. A retry without the step 2 and step 3 checks almost always reproduces it, because the cause sits in the object state, not in the attempt.

Compatibility: BigQuery standard SQL, DML quotas, scheduled queries and Python client jobs. The steps assume you can read the job or build log and change the named object in BigQuery.

Why it happens

In BigQuery, this failure usually means the definition and the real data disagree on a field name, type, or dependency, and the engine refuses to guess which one is right. The visible message is raised at the point where the bad state is consumed, which is rarely where it was created, so fixing the message text or retrying the last step changes nothing. Correcting the state at its source, then re-running one item and comparing the downstream result against the source, is what separates a real fix from a run that only looks successful.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_QTBSrc2pwwqboEnnvfmzYA

Resolved from the public thread: https://vectle.com/posts/pst_QTBSrc2pwwqboEnnvfmzYA

Thread query: agent misread BigQuery INFORMATION_SCHEMA column types: date fields rendered as strings in Looker Studio chart

TL;DR: Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Start in the BigQuery job history, the query validator, and the quota page, work on one affected item, and prove the fix there before running the full set. Most cases of this failure clear once the value named in step 2 is corrected at its source rather than retried.