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Support for INSERT, UPDATE and DELETE in multiple tables #2

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Support for INSERT, UPDATE and DELETE in multiple tables #2

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bf99980
optimized the set() function by reducing the number of assignments to…
ngsankha Oct 20, 2012
df0e6b0
added support for INSERT, UPDATE, DELETE operations on multiple table…
ngsankha Oct 20, 2012
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31 changes: 19 additions & 12 deletions lib/Query.js
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Original file line number Diff line number Diff line change
Expand Up @@ -124,12 +124,10 @@ Query.prototype.sql = function (query, level) {
}

function set(data) {
var sql = "", delim="", i;
for(i in data) {
var sql = "", delim=", ", i;
for(i in data)
sql += delim + nd + i + nd + "=" + self.sql(data[i], level+1);
delim = ", ";
}
return sql;
return sql.substring(2);
}

function values(data) {
Expand Down Expand Up @@ -173,18 +171,27 @@ Query.prototype.sql = function (query, level) {
sql += " WHERE " + where(query.filters);
}
} else if(query.verb == "insert") {
sql = "INSERT INTO " + nd + query.table + nd +
" SET " + set(query.data);
var sql = "", delim="\n", i;
for(i in data)
sql += delim + "INSERT INTO " + nd + query.table[i] + nd +
" SET " + set(query.data[i]);
sql = sql.substring(1);
} else if(query.verb == "update") {
if(!query.filters) throw "Can't update without filters.";
sql = "UPDATE " + nd + query.table + nd +
" SET " + set(query.data) +
" WHERE " + where(query.filters) +
var sql = "", delim="\n", i;
for(i in data)
sql += delim + "UPDATE " + nd + query.table[i] + nd +
" SET " + set(query.data[i]) +
" WHERE " + where(query.filters[i]) +
" LIMIT 1";
sql = sql.substring(1);
} else if(query.verb == "delete") {
if(!query.filters) throw "Can't delete without filters.";
sql = "DELETE FROM " + nd + query.table + nd +
" WHERE " + where(query.filters);
var sql = "", delim="\n", i;
for(i in data)
sql += delim +"DELETE FROM " + nd + query.table[i] + nd +
" WHERE " + where(query.filters[i]);
sql = sql.substring(1);
}

if(!sql) {
Expand Down