Influxdb convert string to float

curious question very valuable piece Thanks..

Influxdb convert string to float

GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. When using the influxdb publisher with the psutil collector, all integers are written to the database as strings. This causes issues with the aggregator functions when querying the data.

I don't see anything I can do differently to effect the datatypes submitted to the database. If I have mis-configured something, please let me know how to correct the issue. However, if you query using an aggregator the same query fails. Obviously you cant find the mean value of a set of strings. It is caused by issues with uint64 type support in influxdb client.

Please take a look at plugin implementation below:. Gopsutil returns uint64 data for memory. Their values overflows int64, and they are stored as string. You should get logs with conversion error placed above in code. I see no errors in the logs. The values being written are nowhere near large enough to overflow int This is from write trace logs for influxdb. Single digit integer values are also written as strings. I locally patched my plugin with this commit and can confirm it does fix the issue.

All of the integer measurements now have the correct datatype.

Python Parse String to Float or Int

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Environment snaptel version snapteld -v snapteld version 1.Acceptable Boolean syntax differs for data writes and data queries. For more information, see Frequently asked questions. Do not quote Boolean field values.

The following statement writes true as a string field value to InfluxDB:.

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It will, however, assume that the double or single quotes are part of the name, key, or value. This can complicate query syntax see the example below. In general, we recommend avoiding using InfluxQL keywords in your schema as it can cause confusion when querying the data.

The keyword time is a special case. In those cases, time does not require double quotes in queries. See Frequently Asked Questions for more information. To learn how to write line protocol to the database, see Tools. If you write a point to a series with a timestamp that matches an existing point, the field set becomes a union of the old and new field set, and conflicts favor the new field set.

For a complete example of this behavior and how to avoid it, see How does InfluxDB handle duplicate points? InfluxDB v1. This page documents an earlier version of InfluxDB, which is no longer actively developed.

Tag keys and tag values are both strings. Field keys are strings. Field values can be floats, integers, strings, or Booleans. Unix nanosecond timestamp. IEEE bit floating-point numbers. This is the default numerical type. Examples: 11. Signed bit integers to Specify an integer with a trailing i on the number.

Example: 1i. The minimum valid timestamp is or T The maximum valid timestamp is or T Double quote string field values. Do not double quote floats, integers, or Booleans.This page addresses frequent sources of confusion and places where InfluxDB behaves in an unexpected way relative to other database systems. Where applicable, it links to outstanding issues on GitHub.

On systemd operating systems you can access the logs using journalctl. InfluxDB stores data in shard groups. Several factors explain why data may not be immediately dropped after a retention policy RP change.

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The first and most likely cause is that, by default, InfluxDB checks to enforce an RP every 30 minutes. The 30 minute interval is configurable.

How to Convert Strings to Floats in Pandas DataFrame

InfluxDB stores data in shard groups which cover a specific RP and time interval. InfluxDB cannot divide shard groups. The syntax for specifying microsecond duration units differs for configuration settings, writes, queries, and setting the precision in the InfluxDB Command Line Interface CLI.

The table below shows the supported syntax for each category:. Some storage providers and distributions have size restrictions; for example:. Trigger a full compaction after startup by adjusting the compact-full-write-cold-duration setting in your InfluxDB configuration file.

For more information, see Using the configuration file. Consider the following items may affect the schedule for compaction:.

When you first connect to the CLI, specify the rfc precision:. In versions prior to v1. Starting with version 1. Specifying the database and retention policy this way is only allowed with the CLI. Writes over HTTP must specify the database and optionally the retention policy with the db and rp query parameters.

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Fully qualify the measurement with the syntax:. Field values can be floats, integers, strings, or Booleans.April 26, by Muhammad Imran. If you are planning to convert varchar to float you should know that these two data types are not compatible with each other. Let me create a sample to explain it. Given below are two different methods to convert varchar to float but these two methods are compatible with different versions of SQL Server. Cleaning :. This is helpful.

Had problems importing flat files and getting conversion errors. Thank you. Comments RSS. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Feeds: Posts Comments. Rate this:. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:.

Email required Address never made public. Name required. Find us on Facebook. Comments left by any independent reader are the sole responsibility of that person. Should you identify any content that is harmful, malicious, sensitive or unnecessary, please contact me via email imran raresql. Blog at WordPress. Post to Cancel. By continuing to use this website, you agree to their use. To find out more, including how to control cookies, see here: Cookie Policy.The option to convert float to String using constructor new Float is not a good idea.

In fact these constructors are deprecated from Java 9. Pages Home core java thread java 8 array coding string sql books j2ee oop collections data structure interview certification. How to convert String to Float in Java and vice-versa - Tutorial. There are three ways to convert a String to float primitive in Java parseFloatvalueOf method of Float class and new Float constructor. Suppose you have String which represents a floating point number e. Since String is one of the most prominent data types in Java, you will often find yourself converting String to IntDouble, and other data types and vice-versa.

Java designer knows about that and they have made arrangement to carry out this basic task in a predictable and consistent manner. Once you know the trick to convert String to float, you should be able to convert String to IntegerDouble, and Short.

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BTW, converting String to a byte array is a little bit tricky because String is text data and bytes are binary, so character encoding comes into the picture. If you want to learn more about how to do conversion between String and byte array, see this step by step tutorial for String to a byte array.

influxdb convert string to float

If you pass an invalid floating point String e. In all cases, autoboxing will take care of converting an object of Float wrapper class to float primitive variable. One advantage of the second method it reads well and also provides caching of frequently used numbers. Third way internally uses the first method to convert String to float variable and then convert it to Float object.

Float to String Conversion in Java On reverse side also, there are three main ways to convert a float variable to String in Java. It could be Float object or float primitive, both will work. Here are the methods to convert a float primitive or Float object back to String containing floating point value : String concatenation Float. If you use Float object then it's toString method is called automatically.

Horstmann to learn more about different static factory methods to convert one type of variable to other primitive or wrapper type in Java. That's all on how to convert String to float in Java and vice-versa. These kinds of little tricks help to improve productivity because you don't need to look back to google to find how to do this job.

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As an experience Java developer, you must know how to do some basic stuff without looking at Google. Posted by javin paul Email This BlogThis! Labels: core javaString. Newer Post Older Post Home. Subscribe to: Post Comments Atom.Alias data types cannot be used. The default value is For a date or time data type expressionstyle can have one of the values shown in the following table.

Other values are processed as 0.

influxdb convert string to float

Beginning with SQL Server All other conversion styles return error Includes all yy without century styles and a subset of yyyy with century styles.

For conversion from datetime or smalldatetime to character data, see the previous table for the output format. SQL Server uses the Kuwaiti algorithm. By default, SQL Server interprets two-digit years based on a cutoff year of That means that SQL Server interprets the two-digit year 49 as and the two-digit year 50 as Many client applications, including those based on Automation objects, use a cutoff year of This allows for the consistent treatment of dates.

We recommend specifying four-digit years. When casting character data representing only date or only time components to the datetime or smalldatetime data types, the unspecified time component is set to Z indicates time zone UTC For example: T When converting smalldatetime to character data, the styles that include seconds or milliseconds show zeros in these positions.

When converting from datetime or smalldatetime values, use an appropriate char or varchar data type length to truncate unwanted date parts. When converting character data to datetimeoffsetusing a style that includes a time, a time zone offset is appended to the result.

InfluxDB frequently asked questions

For a float or real expressionstyle can have one of the values shown in the following table. For a money or smallmoney expressionstyle can have one of the values shown in the following table. For an xml expressionstyle can have one of the values shown in the following table. For a binary nchar nvarbinary nor varchar n expressionstyle can have one of the values shown in the following table.Pages: [1]. I am having a very tough time converting float to string.

I am getting some data from GPS. The coordinates are in float. I want something like Code: [Select]. Code: [Select]. Re: How do you convert a float to string. Here we go again with Strings and strings. A String is not a string. A String is an object supported by the String library. Using them is likely to fragment memory usage which with the limited resources available on the Arduino can cause problems.

A string is an array of chars terminated by a null. Using them does not fragment memory because they are not continually created and destroyed. Please do not send me PMs asking for help. Post in the forum then everyone will benefit from seeing the questions and answers. I just know what you should be doing. There are probably a bazillion ways to solve your problem, and one might be: Code: [Select]. The art of getting good answers lies in asking good questions.

Quote from: econjack on May 30,pm. For what PaulS says you can't do this line: Code: [Select]. I should modify a couple of things later, but I think I got it right this time right?

influxdb convert string to float

Good work! Can you change the subject of the post to solved. I have changed the subject to solved. Oh one more question, if I were to call that in a loop, I would need to clear the buffer.

How do I clear the buffer?? In the way you had write the code, clear the "buffer" with name valueString is done like you already did: Code: [Select]. Quote from: visualxl on Jun 02,am. You say this is solved but I wouldn't be surprised to see you back here with your program randomly crashing because you ignored the advice to avoid the String class capital S in favour of a C-style string.

influxdb convert string to float

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