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Toon alle tabellen. Beschrijf-achtige functionaliteit

Dit gaat verder op een antwoord gegeven Hier . Het voegt de kolommen Character Set en Collation toe, en hetzelfde op database- en tabelniveau. Inbegrepen is barebones sorteren op twee keuzes:alfabetisch en op tabelgrootte, zoals berekend vergelijkbaar met hier . Ik denk nog steeds dat dat concept wat peer review nodig heeft. Rolando op DBA hier toonde een methode, en Rick James merkte op. Het is geen eenvoudige berekening en bevat nooit niet-statische gegevens zoals TEXT en BLOB s. Dus voel je vrij om die berekening te verbeteren en te delen. Hoe dan ook, de tabellen zullen over het algemeen terugkeren in de gewenste sorteervolgorde, indien op 'grootte'. Ik geef geen enkele garantie met betrekking tot de juistheid ervan met betrekking tot de InnoDB-bestandsgrootte.

Het zorgt voor een stub waarmee u de sorteermogelijkheden kunt verbeteren. Bijvoorbeeld door een andere tabel te hebben voor het samenvoegen van de sorteervolgorde op basis van hoofdtabellen versus ondersteunende en codetabellen.

Sessies: Dit is gebaseerd op het concept van een sessie, wat slechts een voorbeeld is waarin u de routines noemt. Zie ze als Momentopnamen die later toegankelijk is. De gegevens op dat moment zijn opgenomen in een Session snapshot. Kan handig zijn als je tabellen verandert. In het bijzonder sortering. Oh, en over sortering, beperkingen van Foreign Key mislukken vaak vanwege onjuiste sorteerinstellingen, aangezien ontwikkelaars code van internet knippen en plakken (tekenset op tabel- en kolomniveau en niet-overeenkomende sorteringen). Daarom heb ik dat in deze versie gegooid.

De routines leven in een database Reporting101a die de twee opgeslagen procedures en enkele ondersteunende tabellen herbergt (vrijwel allemaal op sessies gebaseerd). Ongeveer 5 tafels.

Belvoorbeelden:

  1. call Reporting101a.describeTables_v3('myDb',@theOutVar,false,true,'size')
  2. call Reporting101a.describeTables_v3('myDb',@theOutVar,false,true,'alpha')
  3. call Reporting101a.Print_Tables_Like_Describe(4,'size')

Zie OpmerkingA

Parameters (1e opgeslagen proces):

  1. De databasenaam om alle tabellen te beschrijven.
  2. de INT OUT parameter om de sessie vast te houden #
  3. boolean:wil je dat de gegevens aan het einde uit de rapportagetabel worden verwijderd
  4. boolean:moeten we de opgeslagen procedure van Pretty Printing automatisch aanroepen die describe genereert -achtige uitvoer.
  5. Sorteervolgorde:'maat' of 'alfa'. In feite zal alles behalve 'grootte' resulteren in 'alpha'.

Parameters (Pretty Printing Stored Proc):

  1. Het sessienummer van een eerder opgeslagen momentopname.
  2. Sorteer de volgorde zoals hierboven.

De code is redelijk goed gedocumenteerd, in plaats van er 600 regels code van te maken in plaats van 400.

De routines zijn op zichzelf staand en verwijzen naar zichzelf in de Reporting101a databank. Dus bel ze expliciet vanaf elke locatie.

OpmerkingA: Wat betreft de bovenstaande voorbeelden:Ex. 1 en 2 als vergelijkbaar, alleen een andere sorteervolgorde. Dit is je normale manier om het te gebruiken met slechts één telefoongesprek. De tafelgrootte wordt altijd weergegeven naast de tafelnaam. Alleen met 'maat' wordt het aflopend gesorteerd ben ermee bezig. Met de 4e parameter als True , roept het aan het einde automatisch de Pretty Printing Stored Proc aan. Anders wordt een gewone Jane-resultatenset weergegeven. @theOutVar zal worden geschreven omdat het de gecreëerde Sessie # vertegenwoordigt. Dat is handig om de opgeslagen procedure van Pretty Printing kort daarna handmatig aan te roepen, een van je routines in te klemmen en de gegevens te gebruiken, of de resultaten maanden later opnieuw af te spelen (van de bevroren momentopname). Dus, Ex. 3 is het geval waarin u gegevens voor uitvoer wilt ophalen op basis van een eerdere oproep, nadat u een sessie # hebt teruggekoppeld. Zoals de eerder genoemde voorbeelden 1 en 2 (waarin parameter #4 False zou zijn geweest , echter). Of, als u gewoon opnieuw wilt rapporteren over een eerdere momentopname van gegevens.

Het voorgestelde gebruik is om de sessiegegevens niet te verwijderen na de oproepen. Laat parameter #3 daarom als False , wat betekent niet verwijderen.

De routines hebben op geen enkele manier invloed op uw gegevens. Het wijzigt alleen gegevens in de Reporting101a database.

Uitvoer: Als de routine buiten de opdrachtregel wordt uitgevoerd (zoals in MySQL Workbench), zal een tabelomslagkolom het geheel van alle tabellen omringen die voor uitvoer zijn gegenereerd. Het heeft een kolomkop van '' (lege string). Maar het blijft best vervelend. Dit is te zien in Output1 hieronder weergegeven. Als u echter de opdrachtregel schakelaars -N -B (kolomnamen en batchmodus overslaan) zoals bij de volgende oproep:

mysql -uYourDBUser -p -N -B -e "call Reporting101a.describeTables_v3('Sample011',@theOutVar,false,true,'size')" > sampleOut.txt

... het zal een niet-verpakte uitvoer genereren. Meer aangenaam. Geschreven naar een sampleOut.txt het dossier. Zie Uitvoer2 hieronder.

Getest op: 5.5 , 5.6.31 , en 5.7.13 .

Prestaties: Het gebruikt CURSORS voor de Pretty Printing. Normaal lach ik om het concept. Maar aangezien dit zeldzame oproepen zijn en een minuut of twee misschien acceptabel lijkt, was ik blij te constateren dat de prestaties minder dan 10 seconden waren voor een schema met 120 tabellen. Linux is in mijn testen veel sneller dan Windows.

Twee opgeslagen procedures (inclusief het CREATE SCHEMA bovenaan):

CREATE SCHEMA IF NOT EXISTS `Reporting101a`;    -- See **Note1**

DROP PROCEDURE IF EXISTS `Reporting101a`.`describeTables_v3`;
DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `Reporting101a`.`describeTables_v3`(
    IN pDBName varchar(100), -- the dbname to report table structures
    OUT theSession int, -- OUT parameter for session# assigned
    IN deleteSessionRows BOOL, -- true for delete rows when done from main reporting table for this session#
    IN callTheSecondStoredProc BOOL, -- TRUE = output is from Pretty output in Second Stored Proc. FALSE= not so pretty output
    IN pOrderBy CHAR(20) -- 'ALPHA' OR 'SIZE'. Alphabetical order, or table size order(desc)
)
BEGIN
    DECLARE thisTable CHAR(100);
    DECLARE beginDT,endDT DATETIME;

    SET beginDT=NOW();
    DROP TEMPORARY TABLE IF EXISTS Reporting101a.tOutput;
    CREATE TEMPORARY TABLE Reporting101a.tOutput
    (   id INT AUTO_INCREMENT PRIMARY KEY,
        tblName VARCHAR(100) NOT NULL,
        ordVal INT NOT NULL,
        cField VARCHAR(100) NOT NULL,
        cType VARCHAR(100) NOT NULL,
        cNull VARCHAR(100) NOT NULL,
        cKey VARCHAR(100) NOT NULL,
        cDefault VARCHAR(100) NULL,
        cExtra VARCHAR(100) NULL,
        cCharSetName VARCHAR(100) NULL,
        cCollName VARCHAR(100) NULL
    );
    DROP TEMPORARY TABLE IF EXISTS Reporting101a.tOutput2;
    CREATE TEMPORARY TABLE Reporting101a.tOutput2
    (   tblName varchar(100) primary key,
        colCount INT NOT NULL,
        cFieldMaxLen INT NOT NULL,
        cTypeMaxLen INT NOT NULL,
        cNullMaxLen INT NOT NULL,
        cKeyMaxLen INT NOT NULL,
        cDefaultMaxLen INT NOT NULL,
        cExtraMaxLen INT NOT NULL,
        cCharSetNameMaxLen INT NOT NULL,
        cCollNameMaxLen INT NOT NULL
    );

    INSERT Reporting101a.tOutput(tblName,ordVal,cField,cType,cNull,cKey,cDefault,cExtra,cCharSetName,cCollName)
    SELECT TABLE_NAME,ORDINAL_POSITION,COLUMN_NAME,COLUMN_TYPE,RPAD(IS_NULLABLE,4,' '), 
    RPAD(COLUMN_KEY,3,' '),RPAD(COLUMN_DEFAULT,7,' '),EXTRA,CHARACTER_SET_NAME,COLLATION_NAME
    FROM INFORMATION_SCHEMA.COLUMNS
    WHERE table_schema = pDBName ORDER BY table_name,ordinal_position; 

    UPDATE Reporting101a.tOutput
    SET cExtra='     '
    WHERE cExtra='';

    UPDATE Reporting101a.tOutput
    SET cField=RPAD(cField,5,' ')
    WHERE LENGTH(cField)<5;

    UPDATE Reporting101a.tOutput
    SET cCharSetName=RPAD(COALESCE(cCharSetName,''),8,' ')
    WHERE LENGTH(COALESCE(cCharSetName,''))<8;

    UPDATE Reporting101a.tOutput
    SET cCollName=RPAD(COALESCE(cCollName,''),9,' ')
    WHERE LENGTH(COALESCE(cCollName,''))<9;

    INSERT Reporting101a.tOutput2(tblName,colCount,cFieldMaxLen,cTypeMaxLen,cNullMaxLen,
    cKeyMaxLen,cDefaultMaxLen,cExtraMaxLen,cCharSetNameMaxLen,cCollNameMaxLen) 
    SELECT tblName,COUNT(*),0,0,0,0,0,0,0,0
    FROM Reporting101a.tOutput 
    GROUP BY tblName;

    UPDATE tOutput2 t2
    JOIN
    (   SELECT tblName,MAX(LENGTH(cField)) AS mField,MAX(LENGTH(cType)) AS mType,MAX(LENGTH(cNull)) AS mNull,
        IFNULL(MAX(LENGTH(cKey)),0) AS mKey,IFNULL(MAX(LENGTH(cDefault)),0) AS mDefault,IFNULL(MAX(LENGTH(cExtra)),0) AS mExtra,
        IFNULL(MAX(LENGTH(cCharSetName)),0) AS mCharSetName,IFNULL(MAX(LENGTH(cCollName)),0) AS mCollName
        FROM Reporting101a.tOutput
        GROUP BY tblName
    ) x
    ON x.tblName=t2.tblName
    SET t2.cFieldMaxLen=x.mField,t2.cTypeMaxLen=x.mType,cNullMaxLen=x.mNull,cKeyMaxLen=x.mKey,
    cDefaultMaxLen=x.mDefault,cExtraMaxLen=x.mExtra,cCharSetNameMaxLen=x.mCharSetName,cCollNameMaxLen=x.mCollName;

    CREATE TABLE IF NOT EXISTS Reporting101a.reportDataSessions
    (   -- For the purpose of safe session auto_inc usage, timings, and rowcount
        -- Please don't delete unless you want the sessions to experience aberrant behavior.
        -- That is, the inability to report on prior sessions run. Which is no big deal.
        sessionId INT AUTO_INCREMENT PRIMARY KEY,
        dbName VARCHAR(100) NOT NULL,
        -- character_set_name VARCHAR(100) NULL,
        -- collation_name VARCHAR(100) NULL,
        creationDT DATETIME NOT NULL,
        partA_BeginDT DATETIME NULL,
        partA_EndDT DATETIME NULL,   -- See the following for fractional seconds:
        partB_BeginDT DATETIME NULL, -- http://dev.mysql.com/doc/refman/5.7/en/fractional-seconds.html
        partB_EndDT DATETIME NULL,
        rowCount INT NULL
    );

    CREATE TABLE IF NOT EXISTS Reporting101a.reportDataColumns
    (   sessionId INT NOT NULL,
        tblName VARCHAR(100) NOT NULL,  -- Tablename
        ordVal INT NOT NULL,    -- the "position number" of the Column
        cField VARCHAR(100) NOT NULL,   -- The Column
        cType VARCHAR(100) NOT NULL,    -- Datatype
        cNull VARCHAR(100) NOT NULL,    -- Nullability
        cKey VARCHAR(100) NOT NULL, -- Key info
        cDefault VARCHAR(100) NULL, -- Default value
        cExtra VARCHAR(100) NULL,   -- Extra output
        cCharSetName VARCHAR(100) NULL, -- Default value
        cCollName VARCHAR(100) NULL,    -- Extra output
        colCount INT NOT NULL,  -- the columns here and below are de-normalize data
        cFieldMaxLen INT NOT NULL,
        cTypeMaxLen INT NOT NULL,
        cNullMaxLen INT NOT NULL,
        cKeyMaxLen INT NOT NULL,
        cDefaultMaxLen INT NOT NULL,
        cExtraMaxLen INT NOT NULL,
        cCharSetNameMaxLen INT NOT NULL,
        cCollNameMaxLen INT NOT NULL
    );

    CREATE TABLE IF NOT EXISTS Reporting101a.reportDataTables
    (   sessionId INT NOT NULL,
        tblName VARCHAR(100) NOT NULL,  -- tablename
        character_set_name VARCHAR(100) NULL, -- table-level default char set
        collation_name VARCHAR(100) NULL, -- table-level default collation
        rowcount BIGINT NULL, -- rowcount (subject to system refresh, ditto, next column)
        tblSizeMB DECIMAL(14,2) NULL -- in MB
    );

    CREATE TABLE IF NOT EXISTS Reporting101a.reportDataDatabases
    (   sessionId INT NOT NULL,
        dbName VARCHAR(100) NOT NULL,   -- Tablename
        character_set_name VARCHAR(100) NULL, -- db-level default char set
        collation_name VARCHAR(100) NULL -- db-level default collation
    );

    -- For lack of a better notion, we are calling calls "sessions". The programmer calls the
    -- First Stored Proc, and we call that a session after we get a unique next incrementing number.
    -- That number is the session #. House all output with that as a column value. This allows us to 
    -- move between stored procs, have safe output, have historical snapshots, and retain the data 
    -- via a session # for later use, whatever use.
    INSERT Reporting101a.reportDataSessions(dbName,creationDT) VALUES (pDBName,now());
    SET @mySession=LAST_INSERT_ID(); -- there it is, our session # (read the above paragraph)

    INSERT Reporting101a.reportDataColumns(sessionId,tblName,ordVal,cField,cType,cNull,cKey,cDefault,cExtra,cCharSetName,cCollName,
    colCount,cFieldMaxLen,cTypeMaxLen,cNullMaxLen,cKeyMaxLen,cDefaultMaxLen,cExtraMaxLen,cCharSetNameMaxLen,cCollNameMaxLen)    
    SELECT @mySession,t1.tblName,t1.ordVal,t1.cField,t1.cType,t1.cNull,t1.cKey,t1.cDefault,t1.cExtra,t1.cCharSetName,t1.cCollName,
    t2.colCount,t2.cFieldMaxLen,t2.cTypeMaxLen,t2.cNullMaxLen,t2.cKeyMaxLen,t2.cDefaultMaxLen,t2.cExtraMaxLen,t2.cCharSetNameMaxLen,t2.cCollNameMaxLen
    FROM Reporting101a.tOutput t1
    JOIN Reporting101a.tOutput2 t2
    ON t2.tblName=t1.tblName
    ORDER BY t1.tblName,t1.id;

    INSERT Reporting101a.reportDataTables(sessionId,tblName,character_set_name,collation_name,rowcount,tblSizeMB)
    SELECT DISTINCT @mySession,tblName,NULL,NULL,NULL,NULL
    FROM Reporting101a.reportDataColumns
    WHERE [email protected];

    -- http://dev.mysql.com/doc/refman/5.7/en/collation-character-set-applicability-table.html
    -- TLDR; A collation can map to a character set
    UPDATE Reporting101a.reportDataTables rdt
    JOIN INFORMATION_SCHEMA.`TABLES` ist
    ON ist.TABLE_SCHEMA=pDBName AND ist.TABLE_NAME=rdt.tblName
    JOIN INFORMATION_SCHEMA.`COLLATION_CHARACTER_SET_APPLICABILITY` isccsa
    ON isccsa.COLLATION_NAME=ist.TABLE_COLLATION
    SET rdt.character_set_name=isccsa.CHARACTER_SET_NAME,rdt.collation_name=isccsa.COLLATION_NAME,
    rdt.rowcount=ist.TABLE_ROWS,rdt.tblSizeMB=round(((ist.data_length+ist.index_length) / 1048576), 2)
    WHERE [email protected];

    INSERT Reporting101a.reportDataDatabases(sessionId,dbName,character_set_name,collation_name)
    SELECT @mySession,pDBName,DEFAULT_CHARACTER_SET_NAME,DEFAULT_COLLATION_NAME
    FROM INFORMATION_SCHEMA.SCHEMATA
    WHERE schema_name = pDBName;

    DROP TEMPORARY TABLE Reporting101a.tOutput;
    DROP TEMPORARY TABLE Reporting101a.tOutput2;
    SET [email protected]; -- the OUT var that came in as a parameter
    SET endDT=NOW();
    UPDATE Reporting101a.reportDataSessions 
    SET partA_BeginDT=beginDT,partA_EndDT=endDT 
    WHERE [email protected];
    -- ***************************************************************************
    -- ***************************************************************************
    -- Label "Some_Sort_of_Output":
    IF callTheSecondStoredProc=TRUE THEN
        -- The caller says to call the second stored proc (for Pretty Printing)
        -- This will generate output similar to `DESCRIBE myTable`
        -- But remember, it will do it  for EVERY table in referenced database
        CALL Reporting101a.`Print_Tables_Like_Describe`(@mySession,pOrderBy);
        -- The above call just gave you output.
    ELSE
        -- The caller chose to not auto call the Pretty Printing second stored procedure.
        -- Note, the caller can easily call it right after using the OUT parameter.
        -- So our output will be a resultset of out reportDataColumns table for this session #
        IF pOrderBy!='size' THEN
            -- Order by Alpha for any parameter except 'size'
            SELECT * 
            FROM Reporting101a.reportDataColumns 
            WHERE [email protected]
            ORDER BY tblName,ordVal;
        ELSE
            -- Order By size DESC
            SELECT rdc.* 
            FROM Reporting101a.reportDataTables rdt
            JOIN Reporting101a.reportDataColumns rdc 
            ON rdc.tblName=rdt.tblName and rdc.sessionId=rdt.sessionId
            WHERE [email protected]
            ORDER BY rdt.tblSizeMB DESC,rdc.tblName,rdc.ordVal;
        END IF;
    END IF;
    -- ***************************************************************************
    -- ***************************************************************************

    IF deleteSessionRows=TRUE THEN
        -- The caller says output rows are NOT needed at this point. Delete them.
        -- Note, if this boolean comes in TRUE, you can't call Pretty Printing
        -- second stored procedure with the session # because the data is gone.
        --
        -- Regardless, you are getting something back from "Some_Sort_of_Output" above.
        DELETE FROM Reporting101a.reportDataColumns
        WHERE [email protected];

        DELETE FROM Reporting101a.reportDataTables
        WHERE [email protected];

        -- Do not delete the row from the Sessions table for now (you can, I'm not atm)
    END IF;
END$$
DELIMITER ;

-- *****************************************************************
-- *****************************************************************
-- *****************************************************************

DROP PROCEDURE IF EXISTS `Reporting101a`.`Print_Tables_Like_Describe`;
DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `Reporting101a`.`Print_Tables_Like_Describe`(
    IN pSessionId INT,
    IN pOrderBy CHAR(20) -- 'size' or 'alpha' (see CURSORs below). Size means Tablesize (see ____).
)
BEGIN
    -- Please note: CURSOR stuff must come last in DECLAREs, else "Error 1337: Variable or condition decl aft curs" 
    DECLARE beginDT,EndDT DATETIME; 
    DECLARE done INT DEFAULT FALSE;
    DECLARE curTable VARCHAR(100) DEFAULT '';
    DECLARE bFirst BOOL DEFAULT TRUE;
    DECLARE lv_dbName,CharSetName,CollationName,someClueToCaller VARCHAR(100);
    DECLARE lv_rowCount,lineCount INT;
    DECLARE theSize DECIMAL(14,2);
    DECLARE lv_sessionDT DATETIME;
    DECLARE lv_tblName,lv_cField,lv_cType,lv_cNull,lv_cKey,lv_cDefault,lv_cExtra,lv_cCharSetName,lv_cCollName VARCHAR(100);
    DECLARE lv_ordVal,lv_colCount,lv_cFieldMaxLen,lv_cTypeMaxLen,lv_cNullMaxLen,lv_cKeyMaxLen,
    lv_cDefaultMaxLen,lv_cExtraMaxLen,lv_cCharSetNameMaxLen,lv_cCollNameMaxLen INT;
    -- -------------------------------------------------------------------------------------------------------------------
    -- The below cursor is in Alphabetical Ascending order
    DECLARE curAlpha CURSOR FOR SELECT tblName,ordVal,cField,cType,cNull,cKey,cDefault,cExtra,cCharSetName,cCollName,
    colCount,cFieldMaxLen,cTypeMaxLen,cNullMaxLen,cKeyMaxLen,cDefaultMaxLen,cExtraMaxLen,cCharSetNameMaxLen,cCollNameMaxLen
    FROM Reporting101a.reportDataColumns
    WHERE rdt.sessionId=pSessionId
    ORDER BY tblName,ordVal; -- ascending order by tablename then the ordinal position of each column (1..n)

    -- The below cursor is in Tablesize Descending order, followed by tablename + ordinal position ascending
    DECLARE curSize CURSOR FOR SELECT rdc.tblName,rdc.ordVal,rdc.cField,rdc.cType,rdc.cNull,rdc.cKey,rdc.cDefault,
    rdc.cExtra,rdc.cCharSetName,rdc.cCollName,rdc.colCount,rdc.cFieldMaxLen,rdc.cTypeMaxLen,rdc.cNullMaxLen,
    rdc.cKeyMaxLen,rdc.cDefaultMaxLen,rdc.cExtraMaxLen,rdc.cCharSetNameMaxLen,rdc.cCollNameMaxLen
    FROM Reporting101a.reportDataTables rdt
    JOIN Reporting101a.reportDataColumns rdc
    ON rdc.tblName=rdt.tblName and rdc.sessionId=rdt.sessionId
    WHERE rdt.sessionId=pSessionId
    ORDER BY rdt.tblSizeMB DESC,rdc.tblName,rdc.ordVal; -- tablesize desc, then tablename + ordinal position ascending

    -- What is the Ordinal Position? Simply 1..n as saved in the db 
    -- (see ORDINAL_POSITION in INFORMATION_SCHEMA.COLUMNS)
    --
    -- If it is terribly bothersome, then look into 
    -- "ALTER TABLE" and use FIRST or AFTER   .. :)

    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

    -- Please note in the above, CURSOR stuff MUST come LAST else "Error 1337: Variable or condition decl aft curs" 
    -- -------------------------------------------------------------------------------------------------------------------
    SET beginDT=NOW();
    SET lineCount=0;
    CREATE TABLE IF NOT EXISTS Reporting101a.reportOutput
    (   lineNum INT AUTO_INCREMENT PRIMARY KEY,
        sessionId INT NOT NULL,
        lineOut varchar(200) NOT NULL
    );

    DELETE FROM Reporting101a.reportOutput WHERE sessionId=pSessionId; -- cleans up a prior run with this session#

    IF pOrderBy!='size' THEN
        OPEN curAlpha; -- we are in using the Alphabetical Cursor (includes typos from caller for the sort column)
    ELSE
        OPEN curSize; -- we are in using the Tablesize Cursor
    END IF;

    -- **Place004** (Top-most output, Session #, then get top-level database info, there is not much of it)
    -- Here is the importance of it though: it documents the state of things at that point in time
    -- And it allows for reporting later by using that Session # (so that is why a Session # should hang out and remain)
    -- So, a snapshot. You don't even need to print and use the output now. You can have it for later. To compare.
    SELECT creationDT INTO lv_sessionDT FROM Reporting101a.reportDataSessions WHERE sessionId=pSessionId;

    SET someClueToCaller='Typo from caller, using Alphabetical';
    IF pOrderBy='size' THEN
        SET someClueToCaller='table size DESC';
    END IF;
    IF pOrderBy='alpha' THEN
        SET someClueToCaller='tablename alphabetical';
    END IF;
    INSERT Reporting101a.reportOutput(sessionId,lineOut)
    SELECT pSessionId,CONCAT('Session: ', pSessionId, ', Date:',lv_sessionDT,' , SortOrder: ',someClueToCaller);

    INSERT Reporting101a.reportOutput(sessionId,lineOut) VALUES (pSessionId,''); -- blank line

    SELECT dbName,character_set_name,collation_name INTO lv_dbName,CharSetName,CollationName
    FROM Reporting101a.reportDataDatabases
    WHERE sessionId=pSessionId;

    INSERT Reporting101a.reportOutput(sessionId,lineOut)
    SELECT pSessionId,CONCAT('Database: ', lv_dbname, ' (CharSet=', COALESCE(CharSetName,''), ', Collation=', COALESCE(CollationName,''), ')');

    INSERT Reporting101a.reportOutput(sessionId,lineOut) VALUES (pSessionId,''); -- blank line
    -- end **Place004** ----------------------------------------------------------------------


    read_loop: LOOP
        IF pOrderBy!='size' THEN
            FETCH curAlpha INTO lv_tblName,lv_ordVal,lv_cField,lv_cType,lv_cNull,lv_cKey,lv_cDefault,lv_cExtra,lv_cCharSetName,
            lv_cCollName,lv_colCount,lv_cFieldMaxLen,lv_cTypeMaxLen,lv_cNullMaxLen,lv_cKeyMaxLen,lv_cDefaultMaxLen,
            lv_cExtraMaxLen,lv_cCharSetNameMaxLen,lv_cCollNameMaxLen ;
        ELSE
            FETCH curSize INTO lv_tblName,lv_ordVal,lv_cField,lv_cType,lv_cNull,lv_cKey,lv_cDefault,lv_cExtra,lv_cCharSetName,
            lv_cCollName,lv_colCount,lv_cFieldMaxLen,lv_cTypeMaxLen,lv_cNullMaxLen,lv_cKeyMaxLen,lv_cDefaultMaxLen,
            lv_cExtraMaxLen,lv_cCharSetNameMaxLen,lv_cCollNameMaxLen ;
        END IF;
        IF done THEN
            LEAVE read_loop;
        END IF;
        IF lv_tblName<>curTable THEN -- **Place006**, "the IF"
            -- We stumbled into a "This is a New table condition (different table)
            -- So we need to create the New Chunk Header Info (also get table-level info like rowcount etc ie **Place7** below)
            -- (as opposed to just displaying the next column info on a table we were already working with)
            IF bFirst=FALSE THEN
                INSERT Reporting101a.reportOutput(sessionId,lineOut)
                SELECT pSessionId,''; -- Insert a blank line between tables (but not the first time)
            ELSE
                SET bFirst=FALSE;
            END IF;

            -- **Place007** (get top-level table info, there is not much of it, just, like, rowcount, charset, collation)
            SELECT rowcount,character_set_name,collation_name,tblSizeMB INTO lv_rowCount,CharSetName,CollationName,theSize
            FROM Reporting101a.reportDataTables
            WHERE sessionId=pSessionId AND tblName=lv_tblName;

            INSERT Reporting101a.reportOutput(sessionId,lineOut)
            SELECT pSessionId,CONCAT(lv_tblName,' (rowcount=',ifnull(lv_rowCount,0),') (Size=',theSize,'MB) (CharSet=',COALESCE(CharSetName,''), ', Collation=',COALESCE(CollationName,''),')');
            -- end **Place007** ----------------------------------------------------------------------


            INSERT Reporting101a.reportOutput(sessionId,lineOut)
            SELECT pSessionId,CONCAT('+-', 
                REPEAT('-',GREATEST(5,lv_cFieldMaxLen)),  '-+-',
                REPEAT('-',GREATEST(4,lv_cTypeMaxLen)), '-+-',
                REPEAT('-',GREATEST(4,lv_cNullMaxLen)), '-+-',
                REPEAT('-',GREATEST(3,lv_cKeyMaxLen)), '-+-',
                REPEAT('-',GREATEST(7,lv_cDefaultMaxLen)), '-+-',
                REPEAT('-',GREATEST(5,lv_cExtraMaxLen)), '-+-',
                REPEAT('-',GREATEST(8,lv_cCharSetNameMaxLen)),'-+-',
                REPEAT('-',GREATEST(5,lv_cCollNameMaxLen)), '-+');

            SET @dashLineNumRow=LAST_INSERT_ID(); -- **Place008**: Save this row id so we can use it again in one sec

            INSERT Reporting101a.reportOutput(sessionId,lineOut)
            SELECT pSessionId,CONCAT('| ', 
                'Field',
                REPEAT(' ',GREATEST(0,lv_cFieldMaxLen-5)),  ' | ',
                'Type',
                REPEAT(' ',GREATEST(0,lv_cTypeMaxLen-4)),   ' | ',
                'Null',
                REPEAT(' ',GREATEST(0,lv_cNullMaxLen-4)),   ' | ',
                'Key',
                REPEAT(' ',GREATEST(0,lv_cKeyMaxLen-3)),    ' | ',
                'Default',
                REPEAT(' ',GREATEST(0,lv_cDefaultMaxLen-7)),    ' | ',
                'Extra',
                REPEAT(' ',GREATEST(0,lv_cExtraMaxLen-5)),  ' | ',
                'Char Set',
                REPEAT(' ',GREATEST(0,lv_cCharSetNameMaxLen-8)),    ' | ',
                'Collation',
                REPEAT(' ',GREATEST(0,lv_cCollNameMaxLen-9)),   ' |');

            INSERT Reporting101a.reportOutput(sessionId,lineOut)
            SELECT pSessionId,lineOut FROM Reporting101a.reportOutput
            WHERE [email protected]; -- related to **Place008** above (just repeat it to close-off header)

            SET curTable=lv_tblName; -- set the variable which is our flag for Next/New/Different table (related: **Place006** above)
        END IF;

        -- The below is the generic insert for a column's info
        INSERT Reporting101a.reportOutput(sessionId,lineOut)
        SELECT pSessionId,
            CONCAT('| ', 
            lv_cField,
            COALESCE(REPEAT(' ',GREATEST(0,lv_cFieldMaxLen-LENGTH(lv_cField))),''),' | ',
            COALESCE(lv_cType,''),
            COALESCE(REPEAT(' ',GREATEST(0,lv_cTypeMaxLen-LENGTH(lv_cType))),''),' | ',
            COALESCE(lv_cNull,''),
            COALESCE(REPEAT(' ',GREATEST(0,lv_cNullMaxLen-LENGTH(lv_cNull))),''),' | ',
            COALESCE(lv_cKey,'   '),
            COALESCE(REPEAT(' ',GREATEST(0,lv_cKeyMaxLen-LENGTH(lv_cKey))),''),' | ',
            COALESCE(lv_cDefault,'       '),
            COALESCE(REPEAT(' ',GREATEST(0,lv_cDefaultMaxLen-LENGTH(lv_cDefault))),''),' | ',
            COALESCE(lv_cExtra,'     '),
            COALESCE(REPEAT(' ',GREATEST(0,lv_cExtraMaxLen-LENGTH(lv_cExtra))),''),' | ',
            lv_cCharSetName, 
            REPEAT(' ',GREATEST(0,lv_cCharSetNameMaxLen-LENGTH(lv_cCharSetName))),' | ',
            lv_cCollName,
            REPEAT(' ',GREATEST(0,lv_cCollNameMaxLen-LENGTH(lv_cCollName))),' |');
        SET lineCount=lineCount+1; -- increment only for column rows not separator rows
        INSERT Reporting101a.reportOutput(sessionId,lineOut)
        SELECT pSessionId,lineOut
        FROM Reporting101a.reportOutput
        WHERE [email protected];
    END LOOP;
    IF pOrderBy!='size' THEN
        CLOSE curAlpha;
    ELSE 
        CLOSE curSize;
    END IF;

    SET endDT=NOW();

    UPDATE Reporting101a.reportDataSessions 
    SET partB_BeginDT=beginDT,partB_EndDT=endDT,rowCount=lineCount
    WHERE sessionId=pSessionId;

    SELECT lineOut AS '' from Reporting101a.reportOutput WHERE sessionId=pSessionId ORDER BY lineNum;
    -- Note: The whole outer box wrapper is suppressed (which is cool) if we perform a
    --
    -- OSPrompt> mysql -N -B -u UserName -p -e "call Reporting101a.describeTables_v3('stackoverflow',@theOutVar,false,true,'size')"
    --
    -- That above -N -B suppresses column info (-N), ... (-B) keeps the output left aligned and is Batch mode
    -- I understand (-N), but without (-B) the alignment goes right-aligned
    -- Regardless, it allows us to perform what would appear to 
    -- be merely PRINT statements, if you will. No outer box wrapper in output.
END$$
DELIMITER ;

Uitgang1 (toont verpakking/met buitenste tafel). De twee gele markeerstiften zijn de tafelnamen.

Output2 (Opdrachtregel met -N -B schakelaars) die de buitenste wikkeltafel verwijderen. Zie voorbeeld hierboven in Uitvoer gedeelte voor gebruik. Effectief maakt PRINT-achtige commando's in MySQL mogelijk.




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