Varchar computed column without explicit type does not populate
RDB$CHARACTER_LENGTH
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Key: CORE-5862
URL: http://tracker.firebirdsql.org/browse/CORE-5862
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.3, 2.5.8, 4.0 Alpha 1
Environment: Firebird-4.0.0.1040-0_x64 Windows
Reporter: Mark Rotteveel
When defining a computed column with an explicit type, the
RDB$FIELDS.RDB$CHARACTER_LENGTH is populated. Doing the same without an
explicit length leaves this column NULL.
Reproduction (using default character set UTF8):
CREATE TABLE TEST_COLUMN_METADATA (
col_varchar_default_user VARCHAR(100) DEFAULT USER,
col_varchar_default_literal VARCHAR(100) DEFAULT 'literal',
col_varchar_generated_explicit VARCHAR(201) COMPUTED BY
(col_varchar_default_user || ' ' || col_varchar_default_literal),
col_varchar_generated_implicit COMPUTED BY (col_varchar_default_user || ' '
|| col_varchar_default_literal)
)
col_varchar_generated_explicit will have
RDB$FIELDS.RDB$FIELD_LENGTH = 804
RDB$FIELDS.RDB$FIELD_TYPE = 37
RDB$CHARACTER_LENGTH = 201
RDB$CHARACTER_SET_ID = 4
col_varchar_generated_implicit however has:
RDB$FIELDS.RDB$FIELD_LENGTH = 804
RDB$FIELDS.RDB$FIELD_TYPE = 37
RDB$CHARACTER_LENGTH = NULL (0 in 2.5.8)
RDB$CHARACTER_SET_ID = 4
Based on the information available, Firebird should populated
RDB$CHARACTER_LENGTH with 201 for the implicit type as well.
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