Question

我正在尝试使用shell脚本在查询中转换AS之后的所有单词：

SELECT
first_name AS First_Name,
last_name AS Last_Name,
AGE('1990-10-12') AS Person_Age
FROM table1

我需要的输出是

SELECT
first_name AS first_name,
last_name AS last_name,
AGE('1990-10-12') AS person_age
FROM table1

Answer 1

如果您使用GNU sed，则可以使用\L，它是s command的扩展名，它将其后的所有内容都转换为小写：

$ sed -E 's/(AS)(.*)/\1\L\2/' infile
SELECT
first_name AS first_name,
last_name AS last_name,
AGE('1990-10-12') AS person_age
FROM table1

Answer 2

使用awk

awk '/AS/ {for (i=1; i<=NF; i++) if ($i == "AS") $(i+1) = tolower($(i+1))} {print}' < infile.sql

Answer 3

使用Perl

// Load a FeatureCollection from a Fusion Table.
var fromFT = ee.FeatureCollection('ft:1czdOaBYVyu0GA1mcNKIpwEdImsuQqwc0hGudCqv3');
//var selection = fromFT.select('truthCloudCover');

var computePct = function(feature) {
  var trPct = ee.Number(feature.get('truthCloudCover')).divide(100.0);
  var bin = ee.Number(-99);
  if (trPct >= 0.9) {
    bin = ee.Number(3);
  }
  else if (trPct <= 0.1) {
    bin = ee.Number(1);
  }
  else {
    bin = ee.Number(2);
  }  
  return feature.set({bin: bin});
};

var fromFT = fromFT.map(computePct);
// show new property values
print('fromFT', fromFT.limit(6));

var foo = fromFT.select('bin');
print('bin', foo);

var getDict = function(feature) {
  var foo = feature.get('bin'); 
};

var binDict = ee.List.add()

var binDict = fromFT.toDictionary(['name']);
print('binDict', binDict);

将某个关键字之后的单词转换为小写

3 个答案: