. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 7.7. Trapping and Handling Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identifiers below. ◦ Although generator values are stored as 64-bit integers, a Dialect 1 client request, SELECT GEN_ID (MyGen, 1), for example, will return the generator value truncated to 32 bits. • TIME'15:12:56'; timestamp - TIMESTAMP'2018-01-19 13:32:02'; null state - null Details about handling the literals for each data type are discussed in the next chapter, Data Types and Subtypes. 2

please report this on https://github.com/FirebirdSQL/firebird-documentation/issues or submit a pull request with the necessary changes. Preface 1 Table of Contents 1. About the Firebird 4.0 Language Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 7.8. Trapping and Handling Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identifiers below. ◦ Although generator values are stored as 64-bit integers, a Dialect 1 client request, SELECT GEN_ID (MyGen, 1), for example, will return the generator value truncated to 32 bits. •

to API DPB Parameters in V.2.1.2 and V.2.0.5: IMPORTANT A long-standing, legacy loophole in the handling of DPB parameters enabled ordinary users to make con- nection settings that could lead to database becomes effectively like a non-updatable view that has triggers to make it updatable, in that a DML request has to be defined on the view to make the operation on the underlying table happen, viz. 1. if the will operate on the outcome of the view's triggers 2. if the view's triggers do not define any DML request on the underlying table then no DML operation will take place in that table Known Compatibility

. . 25 14. Error Handling And Exception Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 15. Transaction Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 16. Script Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . executed in the latter case. Chapter 13. Isql Prompts 25 Chapter 14. Error Handling And Exception Support Exception handling is a programming construct designed to handle an occurrence that disrupts the

following: • Command line options for the gfix database utility. • Shadow file handling. • Cache and buffer handling. • Transaction management. • Cache management. • Starting and stopping a database active, the reader attempts to get a lock on the apparently active transaction id. If the lock request succeeds, then the other transaction is dead and the reader will either clean up the mess or notify database has been deleted, renamed or has been set to read-only, then gfix will present you with a request to supply the correct path to the original database linux>cd /home/norman/firebird linux>cp my_employee

in this document, please report it on the firebird-documentation issue tracker or submit a pull request fixing the issue.  Before you read on, verify that this guide matches your Firebird version. This (hence the Shared). • Superserver (ThreadedDedicated) is also a single server process with threads handling client connections. There is a single, common database page cache. The server requires exclusive

of the functions listed above under Firebird 2, and you want to benefit from the improved NULL handling, run the script ib_udf_upgrade.sql Chapter 13. User-Defined Functions (UDFs) 39 against your NULL can be treated in the same way as some allowed value for the datatype. If NULL needs special handling, different from any other value, your only option is to use an IF or CASE construct after all.

-103 335544571 dsql_constant_err Data type for constant unknown -104 335544343 invalid_blr Invalid request BLR at offset -104 335544390 syntaxerr BLR syntax error: expected at offset Filter not found to convert type to type -501 335544327 bad_req_handle Invalid request handle Firebird 1.5 Error Codes Updated 04/30/04 p. 7 -501 335544577 dsql_cursor_close_err Attempt 335544575 dsql_cursor_update_err Cursor not updatable -518 335544582 dsql_request_err Request unknown -519 335544688 dsql_open_cursor_request The prepare statement identifies a prepare statement with an open

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.5. Database information request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.7. Transaction information request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table of Contents 1 5.10. Information request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

expression %s Firebird 2.0 Error Codes SQLCODE GDSCODE SYMBOL TEXT -104 335544343 invalid_blr Invalid request BLR at offset %ld -104 335544390 syntaxerr BLR syntax error: expected %s at offset %ld, encountered array_convert_error Unsupported conversion to target type ARRAY -501 335544327 bad_req_handle Invalid request handle -501 335544577 dsql_cursor_close_err Attempt to reclose a closed cursor -502 336003090 dsql_cursor_update_err Cursor %s is not updatable -518 335544582 dsql_request_err Request unknown -519 335544688 dsql_open_cursor_request The prepare statement identifies a prepare statement with an open