多维表格
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'use strict';
exports.findOrInsertObjectArrayByKey = (obj, key, array) => {
let found = 0;
let i = 0;
for (i = 0; i < array.length; ++i) {
if (key in array[i]) {
if (obj[key] === array[i][key]) {
found = 1;
break;
}
}
}
if (!found) {
array.push(obj)
}
return array[i];
};
exports.findObjectInArrayByKey = (key, value, objArray) => {
for (let i = 0; i < objArray.length; ++i) {
if (objArray[i][key] === value) {
return objArray[i];
}
}
return null;
};
exports.round = function(number, precision) {
var factor = Math.pow(10, precision);
var tempNumber = number * factor;
var roundedTempNumber = Math.round(tempNumber);
return roundedTempNumber / factor;
};
exports.getSchemaQuery = function () {
return 'select c.table_name, c.column_name, c.ordinal_position,c.column_key,c.is_nullable, c.data_type, c.column_type,c.extra,c.privileges, ' +
'c.column_comment,c.column_default,c.data_type,c.character_maximum_length, ' +
'k.constraint_name, k.referenced_table_name, k.referenced_column_name, ' +
's.index_name,s.seq_in_index ' +
'from ' +
'information_schema.columns as c ' +
'left join ' +
'information_schema.key_column_usage as k ' +
'on ' +
'c.column_name=k.column_name and ' +
'c.table_schema = k.referenced_table_schema and ' +
'c.table_name = k.table_name ' +
'left join ' +
'information_schema.statistics as s ' +
'on ' +
'c.column_name = s.column_name and ' +
'c.table_schema = s.index_schema and ' +
'c.table_name = s.table_name ' +
'where ' +
'c.table_schema=? ' +
'order by ' +
'c.table_name, c.ordinal_position';
};