sweet-data/lib/sql/index.js

plugin to pretty-print or minify XML, JSON, CSS and SQL files

function sql(text) {

    var ar_by_quote = text.replace(/\s{1,}/g," ")
                        .replace(/\'/ig,"~::~\'")
                        .split('~::~'),
        len = ar_by_quote.length,
        ar = [],
        deep = 0,
        tab = this.step,//+this.step,
        inComment = true,
        inQuote = false,
        parenthesisLevel = 0,
        str = '',
        ix = 0;

    for(ix=0;ix<len;ix++) {

        if(ix%2) {
            ar = ar.concat(ar_by_quote[ix]);
        } else {
            ar = ar.concat(split_sql(ar_by_quote[ix], tab) );
        }
    }

    len = ar.length;
    for(ix=0;ix<len;ix++) {

        parenthesisLevel = isSubquery(ar[ix], parenthesisLevel);

        if( /\s{0,}\s{0,}SELECT\s{0,}/.exec(ar[ix]))  { 
            ar[ix] = ar[ix].replace(/\,/g,",\n"+tab+tab+"")
        } 

        if( /\s{0,}\(\s{0,}SELECT\s{0,}/.exec(ar[ix]))  { 
            deep++;
            str += this.shift[deep]+ar[ix];
        } else 
        if( /\'/.exec(ar[ix]) )  { 
            if(parenthesisLevel<1 && deep) {
                deep--;
            }
            str += ar[ix];
        }
        else  { 
            str += this.shift[deep]+ar[ix];
            if(parenthesisLevel<1 && deep) {
                deep--;
            }
        } 
    }

    str = str.replace(/^\n{1,}/,'').replace(/\n{1,}/g,"\n");
    return str;
}

function sqlmin(text) {
    return text.replace(/\s{1,}/g," ").replace(/\s{1,}\(/,"(").replace(/\s{1,}\)/,")");
}

function isSubquery(str, parenthesisLevel) {
  return  parenthesisLevel - (str.replace(/\(/g,'').length - str.replace(/\)/g,'').length )
}

function split_sql(str, tab) {

    return str.replace(/\s{1,}/g," ")

        .replace(/ AND /ig,"~::~"+tab+tab+"AND ")
        .replace(/ BETWEEN /ig,"~::~"+tab+"BETWEEN ")
        .replace(/ CASE /ig,"~::~"+tab+"CASE ")
        .replace(/ ELSE /ig,"~::~"+tab+"ELSE ")
        .replace(/ END /ig,"~::~"+tab+"END ")
        .replace(/ FROM /ig,"~::~FROM ")
        .replace(/ GROUP\s{1,}BY/ig,"~::~GROUP BY ")
        .replace(/ HAVING /ig,"~::~HAVING ")
        //.replace(/ IN /ig,"~::~"+tab+"IN ")
        .replace(/ IN /ig," IN ")
        .replace(/ JOIN /ig,"~::~JOIN ")
        .replace(/ CROSS~::~{1,}JOIN /ig,"~::~CROSS JOIN ")
        .replace(/ INNER~::~{1,}JOIN /ig,"~::~INNER JOIN ")
        .replace(/ LEFT~::~{1,}JOIN /ig,"~::~LEFT JOIN ")
        .replace(/ RIGHT~::~{1,}JOIN /ig,"~::~RIGHT JOIN ")
        .replace(/ ON /ig,"~::~"+tab+"ON ")
        .replace(/ OR /ig,"~::~"+tab+tab+"OR ")
        .replace(/ ORDER\s{1,}BY/ig,"~::~ORDER BY ")
        .replace(/ OVER /ig,"~::~"+tab+"OVER ")
        .replace(/\(\s{0,}SELECT /ig,"~::~(SELECT ")
        .replace(/\)\s{0,}SELECT /ig,")~::~SELECT ")
        .replace(/ THEN /ig," THEN~::~"+tab+"")
        .replace(/ UNION /ig,"~::~UNION~::~")
        .replace(/ USING /ig,"~::~USING ")
        .replace(/ WHEN /ig,"~::~"+tab+"WHEN ")
        .replace(/ WHERE /ig,"~::~WHERE ")
        .replace(/ WITH /ig,"~::~WITH ")
        //.replace(/\,\s{0,}\(/ig,",~::~( ")
        //.replace(/\,/ig,",~::~"+tab+tab+"")
        .replace(/ ALL /ig," ALL ")
        .replace(/ AS /ig," AS ")
        .replace(/ ASC /ig," ASC ") 
        .replace(/ DESC /ig," DESC ") 
        .replace(/ DISTINCT /ig," DISTINCT ")
        .replace(/ EXISTS /ig," EXISTS ")
        .replace(/ NOT /ig," NOT ")
        .replace(/ NULL /ig," NULL ")
        .replace(/ LIKE /ig," LIKE ")
        .replace(/\s{0,}SELECT /ig,"SELECT ")
        .replace(/~::~{1,}/g,"~::~")
        .split('~::~');
}

exports.sql = sql;
exports.sqlmin = sqlmin;