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Graph/postgres-json-type-mismatch

Pattern

Postgres JSON/Text Mismatch

postgres-json-type-mismatch

Storing or filtering JSON/text array-like data in Postgres fails when query expressions treat the column as the wrong type, so LIKE/array conversions or jsonb operations silently produce empty or incorrect results despite seemingly valid SQL.

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Updated5/30/2026

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30 linked nodes

replaces the entire column value when a patch is provided — Using `COALESCE($1::jsonb, column)` in a PostgreSQL UPDATE to "patch" JSONB columns. Tension: Existing keys not present in the patch are lost. Outcome: This breaks any system that expects partial JSONB updates.

A PostgreSQL DATE column (start_date) queried via Vercel Postgres/Neon is returned in the client as a full ISO timestamp string with timezone (e.g., 2025-02-06T16:00:00.000Z) instead of the expected YYYY-MM-DD date format.

Requests from a Next.js app to Vercel Postgres intermittently fail with unpredictable results and no clear error messages, even though the same SQL queries work reliably when run directly in the database.

cannot adapt type 'dict' using placeholder '%s' (format: AUTO) — running query below query i'm getting error. Tension: I want check whether the particular email template is used in any other model instance and model Rule we have action(JSONB). Outcome: Rather than trying to construct a JSON literal in SQLAlchemy you could let Postgres do it using the `jsonb_build_object` function.

error: could not determine data type of parameter [REDACTED] — Extended a Postgres SQL query in TypeScript (pg driver) to support optional filters. Outcome: Result: `error: could not determine data type of parameter [REDACTED]` on query execution.

when I use Data Conversion Parameters like `EMPTYASNULL` it loads both blanks and nulls as NULL — load blank values as blank and null values as null from a CSV using COPY command in Redshift. Tension: I am expecting blank value in the column for row (with extra='B') but seems like every thing is loaded as null. Outcome: How do I make it blank?

I can read file postgres.csv — I've deployed an EDB cluster on OpenShift. Tension: I'm unable to read the contents of the postgres.json file. Outcome: they currently don't.

Selecting a more optimal index for a PostgreSQL query that filters on multiple fields inside a JSONB column

ERROR: function to_date(bytea, unknown) does not exist — on PostgreSQL. Tension: Hint: No function matches the given name and argument types.

I want to check if Value_Name with Value exists in any of the elements in Inner array — I have an PostgreSQL database with complex JSON structures. Tension: I think I should be able to do it with the `@>` operator but can't seem to get it working. Outcome: Can anyone suggest what I can do search the array?

psql reports a syntax error when using :myVar inside a PostgreSQL DO block

you get the type mismatch error — merge with PostgreSQL 17.2. Tension: there's no immediate context that could be used to guess its intended type. Outcome: it defaults to `text`.

The sentences in the database can have their words in any order (rearranged). — retrieve all rows from a PostgreSQL database that contain sentences similar to a provided string. Tension: The answer should return all 4 of the above rows. Outcome: It looks like fairly simple full text search can produce the results you described.

jsonb_path_query() is failing when given the output of a SQL function that returns a JSON string, because the target argument type does not match the required jsonb type.

need to check the type of a given object — I'm working on a PostgreSQL database. Tension: Currently, I'm using multiple queries and conditions to determine the object type.

I am getting the dates in 2 different format — I am working on a data movement where the source is MongoDB and target is Redshift. Outcome: tried using the regex to remove the string part in the format1 and apply the same logic for the upcoming data as well but I am unable to get the correct query.

The query uses json_to_recordset on a single JSON document, but it needs to work over multiple JSON documents stored in a table. As written, it cannot return results across all table rows.

Attempting to use UNNEST on multiple TEXT[] arrays to insert array elements as rows into a table results in misaligned values across columns. The inserted data ends up shifted (e.g., id/name/phone values come from different arrays).

Want to update the value of cc where subsectionid =27 — I need to update a jsonb object in PostgreSQL. Tension: unable to identify the correct syntax for updating the same.

And PostgresHook does not want to work — When substituting in PostgresOperator, everything works out well. Tension: I want to use Templates reference - {{ds}}. Outcome: render the template values explicitly.

Updating a jsonb column to remove specific keys (e.g., value1 and value2) for rows where a=1 does not delete the keys as expected using jsonb subtraction with multiple keys via VALUES/joins.

Implementing cursor-based pagination in Knex/Postgres using a tuple comparison like `(timestamp, id) > (cursor.timestamp, cursor.id)` fails and returns no rows. The attempted Knex query with two separate `where` clauses behaves like an `AND` comparison rather than the intended tuple `>` semantics.

When sensitive fields are encrypted in PostgreSQL, queries using WHERE (e.g., exact match) cannot efficiently filter rows because the encrypted values cannot be compared without decrypting them. This makes encrypted-field searches slow and impractical at scale.

PostgreSQL throws `set-returning functions are not allowed in WHERE` when using a query pattern like `id in (unnest(?))` with a JDBC-provided array parameter.

Outcome: Use `LONGTEXT` to handle large JSON.

column "columnName" is of type text[] but expression is of type character varying. Tension: Hint: You will need to rewrite or cast the expression. Outcome: Remove `StringArrayConverter` class. You don't need it.

Trying to replace a working native Postgres query that uses ARRAY_AGG with a non-native Spring Data JPA query and projection. Hibernate throws a SemanticException related to using ordered set aggregate functions (array_agg) without the required WITHIN GROUP/OVER clause.

It works, sort of, but the result adds an extra quote to my string. — I need to annotate a value that is saved in a json field in the same model. Tension: I need it to be cast to text/char in the query because a subsequent search will only work on text/char (trigram similarity).

PostgreSQL query on a large users table is slow because `LIKE "%@example.com"` does not use the email index

parent INSERT and the findings INSERT must be in the same transaction — existing public/staff Hono routes that previously wrote raw user input directly to Postgres. Outcome: route handlers blow up with "values is not a function" during tests.

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