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Serious Serious
Reported By: Roy Lambert
Reported On: 7/15/2016
For: Version 2.24 Build 2
# 4422 Trying to Modify a Column Involved in a Computed BLOB Column Causes "Field Cannot Be Modified" Error

With the table definition below my sig I try and alter column _Bands and get this error message

Field '_xAllText' cannot be modified.

_xAllText is a computed column. After the warning the data is actually altered - anyone have a suggestion.

I thought it might be that I'm not allowed to catenate CLOBs but a simple select _xAllText works on the data that's there.

Just tried entering data into _Band1. First click on post I get the warning, second click it posts.

CREATE TABLE "QSC"
(
"_ID" INTEGER GENERATED ALWAYS AS IDENTITY (START WITH 0, INCREMENT BY 1) NOT NULL,
"_Name" VARCHAR(50) COLLATE "ANSI_CI" NOT NULL,
"_Indicator" VARCHAR(10) COLLATE "ANSI_CI" DEFAULT 'Skill' NOT NULL DESCRIPTION 'Qualifier
Skill
Competency',
"_Description" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Bands" INTEGER DEFAULT 4 NOT NULL,
"_Questions" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Band0" VARCHAR(50) COLLATE "ANSI_CI",
"_Band1" VARCHAR(50) COLLATE "ANSI_CI",
"_Band2" VARCHAR(50) COLLATE "ANSI_CI",
"_Band3" VARCHAR(50) COLLATE "ANSI_CI",
"_Band4" VARCHAR(50) COLLATE "ANSI_CI",
"_Guidance0" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Guidance1" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Guidance2" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Guidance3" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Guidance4" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Development0" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Development1" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Development2" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Development3" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_Development4" CLOB COLLATE "ANSI_CI" COMPRESSION 6,
"_xGlyph" INTEGER COMPUTED ALWAYS AS CASE
WHEN _Indicator = 'Qualifier' THEN 0
WHEN _Indicator = 'Skill' THEN 1
WHEN _Indicator = 'Competency' THEN 2
WHEN _Indicator = 'Group' THEN 3
ELSE -1
END NOT NULL,
"_xAllText" CLOB COLLATE "ANSI_CI" COMPRESSION 6 COMPUTED ALWAYS AS CAST(
COALESCE(_Questions,'')+' '+COALESCE(_Name,'')+' '+ COALESCE(_Description,'')+' ' +
COALESCE(_Band0,'')+' '+COALESCE(_Guidance0,'')+' '+COALESCE(_Development0,'')+' '+
COALESCE(_Band1,'')+' '+COALESCE(_Guidance1,'')+' '+COALESCE(_Development1,'')+' '+
COALESCE(_Band2,'')+' '+COALESCE(_Guidance2,'')+' '+COALESCE(_Development2,'')+' '+
COALESCE(_Band3,'')+' '+COALESCE(_Guidance3,'')+' '+COALESCE(_Development3,'')+' '+
COALESCE(_Band4,'')+' '+COALESCE(_Guidance4,'')+' '+COALESCE(_Development4,'') AS CLOB),
"_xBand" CLOB COLLATE "ANSI_CI" COMPRESSION 6 COMPUTED ALWAYS AS CAST(
COALESCE(_Band0,'')+' '+
COALESCE(_Band1,'')+' '+
COALESCE(_Band2,'')+' '+
COALESCE(_Band3,'')+' '+
COALESCE(_Band4,'') AS CLOB),
"_xGuidance" CLOB COLLATE "ANSI_CI" COMPRESSION 6 COMPUTED ALWAYS AS CAST(
COALESCE(_Guidance0,'')+' '+
COALESCE(_Guidance1,'')+' '+
COALESCE(_Guidance2,'')+' '+
COALESCE(_Guidance3,'')+' '+
COALESCE(_Guidance4,'') AS CLOB),
"_xDevelopment" CLOB COLLATE "ANSI_CI" COMPRESSION 6 COMPUTED ALWAYS AS CAST(
COALESCE(_Development0,'')+' '+
COALESCE(_Development1,'')+' '+
COALESCE(_Development2,'')+' '+
COALESCE(_Development3,'')+' '+
COALESCE(_Development4,'') AS CLOB),
CONSTRAINT "PK" PRIMARY KEY ("_ID"),
CONSTRAINT "MaxBands" CHECK ((_Bands >=1 AND _Bands <=4))
,
CONSTRAINT "Names" UNIQUE ("_Name")
)
VERSION 1.00
READWRITE
UNENCRYPTED
INDEX PAGE SIZE 8192
BLOB BLOCK SIZE 1024
PUBLISH BLOCK SIZE 1024
PUBLISH COMPRESSION 0
MAX ROW BUFFER SIZE 32768
MAX INDEX BUFFER SIZE 65536
MAX BLOB BUFFER SIZE 32768
MAX PUBLISH BUFFER SIZE 32768



Resolution Resolution
Fixed Problem on 7/18/2016 in version 2.24 build 3


Products Affected Products Affected
ElevateDB Additional Software and Utilities
ElevateDB DAC Client-Server
ElevateDB DAC Client-Server with Source
ElevateDB DAC Standard
ElevateDB DAC Standard with Source
ElevateDB DAC Trial
ElevateDB LCL Standard with Source
ElevateDB PHP Standard
ElevateDB PHP Standard with Source
ElevateDB PHP Trial
ElevateDB VCL Client-Server
ElevateDB VCL Client-Server with Source
ElevateDB VCL Standard
ElevateDB VCL Standard with Source
ElevateDB VCL Trial

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