SAPSQL_WHERE_ILLEGAL_VALUE — SAPSQL_WHERE_ILLEGAL_VALUE Dump Diagnosis
This dump fires when the database interface rejects a WHERE condition because a value in it is structurally invalid for Open SQL, most commonly a select-options or ranges table entry with an illegal SIGN or OPTION code, or a dynamically built WHERE clause containing a malformed literal. It is a syntax-level rejection before the statement reaches the database, not a data content problem.
Covers the SAPSQL_WHERE_ILLEGAL_VALUE short dump raised by the ABAP database interface when a WHERE clause value fails Open SQL's own validation rules. Focuses on the recurring causes: corrupted ranges tables, dynamic WHERE string construction, and RFC-supplied selection data, and gives the order in which to read the dump and fix the source.
Published 16 Sept 2026· 1,199 words
What the dump means
The dump is raised by the database interface layer of the ABAP runtime, not by the database itself. Before a SELECT is handed to the DBMS, the kernel validates every value used in the WHERE clause against the rules Open SQL enforces: valid SIGN (I or E), valid OPTION (EQ, NE, GE, LE, GT, LT, CP, NP, BT, NB), consistent LOW/HIGH pairing for BT and NB, and syntactically closed literals in dynamically built condition strings. When one of these checks fails, the kernel refuses to construct the statement and raises SAPSQL_WHERE_ILLEGAL_VALUE rather than sending garbage to the database. It is therefore an ABAP-side defect surfacing at runtime, almost never a database configuration issue, and almost never something a Basis restart resolves.
Root causes that actually produce it
- Corrupted ranges or select-options table: an entry has SIGN or OPTION values outside the allowed set, typically because the table was populated by direct APPEND or MOVE-CORRESPONDING from an RFC payload, a BAPI table parameter, or a customer exit, bypassing the normal SELECT-OPTIONS syntax checks that would catch this at compile time.
- BT or NB option with HIGH not filled or HIGH lower than LOW: common when a selection screen variant or a batch input recording was built against an older screen and never repopulated, or when logic dynamically sets LOW without also setting HIGH before assigning the range entry.
- Dynamically constructed WHERE clause string with an unbalanced or unescaped literal: string concatenation building a dynamic WHERE condition where a variable's value contains an apostrophe or is empty when the code assumes a quoted literal, producing a fragment the parser cannot close correctly.
- Field symbol or generic work area used to populate a ranges structure without a type match, so SIGN and OPTION land in the wrong offset of the structure and contain arbitrary bytes rather than valid character codes.
- Data passed from an external system through an RFC-enabled function module or an OData service that skips ABAP-side selection screen validation, so option codes from another system's convention (a numeric flag, a lowercase option) arrive unfiltered.
- Custom code building a range table by hand with LOW and HIGH set but OPTION left as an uninitialized or copy-pasted value that does not correspond to any of the ten legal options.
What to inspect in ST22
- Error analysis heading and 'What happened' text: confirms which value was rejected and, in newer kernels, sometimes names the field or table involved.
- ABAP source code extract and the highlighted statement: identifies the exact SELECT, and whether the WHERE clause is static (referencing a ranges table by name) or dynamic (a string variable).
- Active calls / events (call stack): shows the function module, class method, or program that owns the ranges table, which is usually several frames above the SELECT itself since the corruption happens earlier during population.
- Variable listing at the point of the dump: locate the ranges or select-options internal table used in the WHERE clause and read its rows directly, checking SIGN, OPTION, LOW and HIGH values for anything outside I/E and the ten legal option codes.
- System information block: note the transaction code, the calling program, and whether the call originated from RFC, background job, or dialog, which narrows whether the bad data came from inside the system or from an external caller.
- Follow-on: use the variable display to trace backward to the statement that filled the table, then check the calling transaction or interface for how that data was sourced.
Resolution path
If a ranges or select-options table contains an illegal SIGN or OPTION, trace back to where the table is filled and add explicit validation or use the SELECT-OPTIONS statement's own syntax rather than manual APPEND with hardcoded literals; this is a code fix requiring a transport. If the cause is a BT range with HIGH unset, add a check that populates HIGH before the entry is appended, or reject the entry upstream if HIGH is genuinely unavailable; also a code change. If the cause is a dynamic WHERE string, rebuild it using the WHERE clause building blocks that let Open SQL bind values safely instead of string concatenation, or at minimum validate and escape the variable content before splicing it into the condition string. If the bad data originates from an external system via RFC or OData, add inbound validation at the interface boundary rather than deep inside the selection logic, since the same corrupted payload can reach multiple programs. None of these are configuration or Basis fixes; all require a developer to change and transport code, and all should include a unit test reproducing the exact bad combination that caused the dump.
The fix people try first (and why it fails)
The reflex is to wrap the offending SELECT in a TRY block or catch the runtime exception with CATCH SYSTEM-EXCEPTIONS and move on once the dump stops appearing in ST22. This suppresses the visible symptom but leaves the ranges table corrupted for every other statement that consumes it later in the same program, and the next SELECT using the same bad range either dumps somewhere else with a less obvious stack trace or silently returns wrong or empty results because the corrupted condition was dropped rather than fixed.
Prevention
Build ranges and select-options tables only through the SELECT-OPTIONS or RANGES statement and standard append logic with named components (sign-eq or option-cp constants), never through positional MOVE or generic work areas that can misalign the structure. Add a code inspector or ATC check flagging manual construction of range table rows without explicit OPTION and SIGN assignment. For interfaces accepting selection criteria from RFC or OData callers, validate SIGN and OPTION against the fixed value set at the boundary and reject malformed payloads with a proper interface error rather than letting them reach a SELECT.
Whose problem this is
ABAP development owns this dump; it is a code defect, not a Basis or database issue, and functional consultants are only involved if the corrupted data originated from a configuration table feeding a custom range build. The handover note should include the ST22 variable listing showing the exact SIGN/OPTION/LOW/HIGH values, the call stack pinpointing where the table was populated, and the calling channel (dialog, RFC, background job).
Related SAP objects
Reviewed pages this object connects to in the ERPClimb knowledge graph.
Source: ERPClimb — https://erpclimb.com/sap-abap-dumps/sapsql-where-illegal-valueERPClimb is an independent platform and is not affiliated with SAP SE. Reference pages are written and reviewed by SAP consultants for learning and troubleshooting.