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Computed decimal field in a view has wrong RDB$FIELD_PRECISION [CORE5550] #5818

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firebird-issue-importer opened this issue May 25, 2017 · 8 comments

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@firebird-issue-importer

Submitted by: @cincuranet

Steps to reproduce:

1. Create empty database.
2. "create view test(f) as select cast((select null from rdb$database) as decimal(10,2)) from rdb$database;"
3. "select rdb$field_precision, rdb$field_scale from rdb$fields where rdb$field_name='RDB$1';"

Result:
RDB$FIELD_PRECISION 0
RDB$FIELD_SCALE -2

Fails with decimal(2,2), decimal(18,4) as well (and probably with every other).

On 2.5.7 the RDB$FIELD_PRECISION is NULL. Not quite right either.

Commits: 9277af3 d334575

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firebird-issue-importer commented May 25, 2017

Modified by: @cincuranet

Version: 2.5.7 [ 10770 ]

description: Steps to reproduce:

1. Create empty database.
2. "create view test(f) as select cast((select null from rdb$database) as decimal(10,2)) from rdb$database;"
3. "select rdb$field_precision, rdb$field_scale from rdb$fields where rdb$field_name='RDB$1';"

Result:
RDB$FIELD_PRECISION 0
RDB$FIELD_SCALE -2

Fails with decimal(2,2), decimal(18,4) as well (and probably with every other).

=>

Steps to reproduce:

1. Create empty database.
2. "create view test(f) as select cast((select null from rdb$database) as decimal(10,2)) from rdb$database;"
3. "select rdb$field_precision, rdb$field_scale from rdb$fields where rdb$field_name='RDB$1';"

Result:
RDB$FIELD_PRECISION 0
RDB$FIELD_SCALE -2

Fails with decimal(2,2), decimal(18,4) as well (and probably with every other).

On 2.5.7 the RDB$FIELD_PRECISION is NULL. Not quite right too.

@firebird-issue-importer
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firebird-issue-importer commented May 25, 2017

Modified by: @cincuranet

description: Steps to reproduce:

1. Create empty database.
2. "create view test(f) as select cast((select null from rdb$database) as decimal(10,2)) from rdb$database;"
3. "select rdb$field_precision, rdb$field_scale from rdb$fields where rdb$field_name='RDB$1';"

Result:
RDB$FIELD_PRECISION 0
RDB$FIELD_SCALE -2

Fails with decimal(2,2), decimal(18,4) as well (and probably with every other).

On 2.5.7 the RDB$FIELD_PRECISION is NULL. Not quite right too.

=>

Steps to reproduce:

1. Create empty database.
2. "create view test(f) as select cast((select null from rdb$database) as decimal(10,2)) from rdb$database;"
3. "select rdb$field_precision, rdb$field_scale from rdb$fields where rdb$field_name='RDB$1';"

Result:
RDB$FIELD_PRECISION 0
RDB$FIELD_SCALE -2

Fails with decimal(2,2), decimal(18,4) as well (and probably with every other).

On 2.5.7 the RDB$FIELD_PRECISION is NULL. Not quite right either.

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firebird-issue-importer commented May 25, 2017

Commented by: @mrotteveel

Note that a similar problem exists in Firebird 2.5 for computed columns in 'real' tables, but that has been fixed in Firebird 3.

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firebird-issue-importer commented May 29, 2017

Commented by: @asfernandes

Note that precision passed in the CAST datatype will not picked (as in table's computed field defined without declaring its type), as Firebird does not pass on this definition to the needed place.

The calculated precision will be the max. precision for the underlying (short, int, int64) datatype used.

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firebird-issue-importer commented May 29, 2017

Modified by: @asfernandes

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 4.0 Alpha 1 [ 10731 ]

Fix Version: 3.0.3 [ 10810 ]

assignee: Adriano dos Santos Fernandes [ asfernandes ]

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firebird-issue-importer commented May 29, 2017

Modified by: @asfernandes

Version: 4.0 Initial [ 10621 ]

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firebird-issue-importer commented Jun 22, 2017

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

QA Status: No test => Done successfully

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firebird-issue-importer commented Jun 22, 2017

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Closed [ 6 ]

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