[opt-1422][file] 调整 file 判断 fromLine 的逻辑

Author: FlechazoW

file/file-source/src/main/java/com/dtstack/flink/sql/source/file/FileSource.java

@@ -210,7 +210,7 @@ public void run(SourceContext<Row> ctx) throws Exception {
             } else {
                 numInRecord.inc();
 
-                if (numInRecord.getCount() <= fromLine) {
+                if (numInRecord.getCount() < fromLine) {
                     continue;
                 }
 

file/file-source/src/main/java/com/dtstack/flink/sql/source/file/table/FileSourceParser.java

@@ -73,7 +73,7 @@ private FileSourceTableInfo switchTableType(String tableName,
                     tableInfo.setEscapeCharacter(escapeChar);
                 }
 
-                tableInfo.setFromLine(MathUtil.getIntegerVal(props.getOrDefault(FileSourceConstant.FROM_LINE_KEY, 1)));
+                tableInfo.setFromLine(MathUtil.getIntegerVal(props.getOrDefault(FileSourceConstant.FROM_LINE_KEY.toLowerCase(), 1)));
                 tableInfo.buildDeserializationSchema();
                 return tableInfo;
             }