Concat() function in UPDATE statement throws `unknown signature` error while using enum types.

Describe the problem

Concat() function in UPDATE statement throws unknown signature while using enum types for column.

To Reproduce

Create types such as tax_type as enum:

xxx.cockroachlabs.cloud:26257/defaultdb> create type tax_type as enum ('VAT', 'UseTax', 'RegionalVAT', 'SalesTax', 'Other');                                                                                                           
CREATE TYPE

And another type iso_3166_2_type:


xxx.cockroachlabs.cloud:26257/defaultdb> create type iso_3166_2_type as enum ('AF', 'AX', 'AL', 'DZ', 'AS', 'AD', 'AO', 'AI', 'AQ', 'AG', 'AR', 'AM', 'AW', 'AU', 'AT', 'AZ', 'BS', 'BH', 'BD', 'BB', 'BY', 'BE', 'BZ', 'BJ', 'BM',    
                                                                       -> 'BT', 'BV', 'BO', 'BQ', 'BA', 'BW', 'BR', 'IO', 'BN', 'BG', 'BF', 'BI', 'CV', 'KH', 'CM', 'CA', 'KY', 'CF', 'TD', 'CL', 'CN', 'CX', 'CC', 'CO', 'KM', 'CG', 'CD', 'CK', 'CR', 'CI', 'HR',     
                                                                       -> 'CU', 'CW', 'CY', 'CZ', 'DK', 'DG', 'DJ', 'DM', 'DO', 'EC', 'EG', 'SV', 'GQ', 'ER', 'EE', 'ET', 'FK', 'FO', 'FJ', 'FI', 'FR', 'GF', 'PF', 'TF', 'GA', 'GM', 'GE', 'DE', 'GH', 'GI', 'GR',     
                                                                       -> 'GL', 'GD', 'GP', 'GU', 'GT', 'GG', 'GN', 'GW', 'GY', 'HT', 'HM', 'VA', 'HN', 'HK', 'HU', 'IS', 'IN', 'ID', 'IR', 'IQ', 'IE', 'IM', 'IL', 'IT', 'JM', 'JP', 'JE', 'JO', 'KZ', 'KE', 'KI',     
                                                                       -> 'KP', 'KR', 'KW', 'KG', 'LA', 'LV', 'LB', 'LS', 'LR', 'LY', 'LI', 'LT', 'LU', 'MO', 'MK', 'MG', 'MW', 'MY', 'MV', 'ML', 'MT', 'MH', 'MQ', 'MR', 'MU', 'YT', 'MX', 'FM', 'MD', 'MC', 'MN',     
                                                                       -> 'ME', 'MS', 'MA', 'MZ', 'MM', 'NA', 'NR', 'NP', 'NL', 'NC', 'NZ', 'NI', 'NE', 'NG', 'NU', 'NF', 'MP', 'NO', 'OM', 'PK', 'PW', 'PS', 'PA', 'PG', 'PY', 'PE', 'PH', 'PN', 'PL', 'PT', 'PR',     
                                                                       -> 'QA', 'RE', 'RO', 'RU', 'RW', 'BL', 'SH', 'KN', 'LC', 'MF', 'PM', 'VC', 'WS', 'SM', 'ST', 'SA', 'SN', 'RS', 'SC', 'SL', 'SG', 'SX', 'SK', 'SI', 'SB', 'SO', 'ZA', 'GS', 'SS', 'ES', 'LK',     
                                                                       -> 'SD', 'SR', 'SJ', 'SZ', 'SE', 'CH', 'SY', 'TW', 'TJ', 'TZ', 'TH', 'TL', 'TG', 'TK', 'TO', 'TT', 'TN', 'TR', 'TM', 'TC', 'TV', 'UG', 'UA', 'AE', 'GB', 'US', 'UM', 'UY', 'UZ', 'VU', 'VE',     
                                                                       -> 'VN', 'VG', 'VI', 'WF', 'EH', 'YE', 'ZM', 'ZW', 'ZZ');                                                                                                                                        
CREATE TYPE

Time: 1.222s total (execution 1.130s / network 0.092s)

- And then create table with tax_type as tax_type and country_code as iso_3166_2_type :

xxx.cockroachlabs.cloud:26257/defaultdb> CREATE TABLE tax_definition (
-> tax_definition_uid UUID NOT NULL,
-> tax_definition_name VARCHAR NULL, country_code iso_3166_2_type NOT NULL, local_name VARCHAR NOT NULL, abbreviation VARCHAR NOT NULL, prefix VARCHAR NULL, formats VARCHAR[] NOT NULL, -> tax_type tax_type NOT NULL, created_on TIMESTAMPTZ NOT NULL DEFAULT now():::TIMESTAMPTZ, updated_on TIMESTAMPTZ NULL, CONSTRAINT tax_definition_pk PRIMARY KEY (tax_definition_uid ASC),
-> CONSTRAINT tax_definition_country_code FOREIGN KEY (country_code) REFERENCES public.country(country_code) ON DELETE CASCADE ON UPDATE CASCADE, UNIQUE INDEX
-> tax_definition_local_name_country_code_uniq (local_name ASC, country_code ASC), INDEX tax_definition_country_code (country_code ASC) ) LOCALITY REGIONAL BY TABLE IN PRIMARY REGION;


- The UPDATE Statement breaks stating `unknown signature`:

xxx.cockroachlabs.cloud:26257/defaultdb > select * from tax_definition;
tax_definition_uid | tax_definition_name | country_code | local_name | abbreviation | prefix | formats | tax_type | created_on | updated_on ---------------------------------------+---------------------+--------------+-----------------+--------------+--------+---------------------+----------+-------------------------------+------------- d042691c-5044-4e72-944c-d8bf0970503c | VAT IE | IE | Value-Added Tax | VAT | IE | {var-01:1,var-02:2} | VAT | 2024-04-03 06:24:08.643818+00 | NULL (1 row)

Time: 95ms total (execution 3ms / network 93ms)

xxx.cockroachlabs.cloud:26257/defaultdb> UPDATE tax_definition SET tax_definition_name = CONCAT(tax_type, ' ', country_code) WHERE tax_type = 'VAT';
ERROR: unknown signature: concat(tax_type, string, iso_3166_2_type) (returning ) SQLSTATE: 42883 HINT: No function matches the given name and argument types. You might need to add explicit type casts.



**Expected behavior**
There should be no error while using CONCAT() with enum types.

**Additional data / screenshots**
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of the supporting tables.

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**Environment:**
 - CockroachDB version: 24.1.0
 - Server OS: n/a
 - Client app: `cockroach sql`

**Additional context**
Unable to use CONCAT() effectively

Tracking issue for the root cause: https://github.com/cockroachdb/cockroach/issues/75101

Jira issue: CRDB-39198

cockroachdb / cockroach

Concat() function in UPDATE statement throws `unknown signature` error while using enum types. #125025