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Add parseReadableSize* functions to docs

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Francisco Javier Jurado Moreno 2024-06-03 10:47:51 +02:00
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docs/en/sql-reference/functions/other-functions.md
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@ -735,6 +735,8 @@ LIMIT 10
Given a size (number of bytes), this function returns a readable, rounded size with suffix (KB, MB, etc.) as string.
The opposite operations of this function are [parseReadableSize](#parseReadableSize), [parseReadableSizeOrZero](#parseReadableSizeOrZero), and [parseReadableSizeOrNull](#parseReadableSizeOrNull).
**Syntax**
```sql
@ -766,6 +768,8 @@ Result:
Given a size (number of bytes), this function returns a readable, rounded size with suffix (KiB, MiB, etc.) as string.
The opposite operations of this function are [parseReadableSize](#parseReadableSize), [parseReadableSizeOrZero](#parseReadableSizeOrZero), and [parseReadableSizeOrNull](#parseReadableSizeOrNull).
**Syntax**
```sql
@ -890,6 +894,122 @@ SELECT
└────────────────────┴────────────────────────────────────────────────┘
```
## parseReadableSize
Given a string containing a byte size and `B`, `KiB`, `KB`, `MiB`, `MB`, etc. as a unit (i.e. [ISO/IEC 80000-13](https://en.wikipedia.org/wiki/ISO/IEC_80000) or decimal byte unit), this function returns the corresponding number of bytes.
If the function is unable to parse the input value, it throws an exception.
The inverse operations of this function are [formatReadableSize](#formatReadableSize) & [formatReadableDecimalSize](#formatReadableDecimalSize).
**Syntax**
```sql
formatReadableSize(x)
```
**Arguments**
- `x` : Readable size with ISO/IEC 80000-13 or decimal byte unit ([String](../../sql-reference/data-types/string.md)).
**Returned value**
- Number of bytes, rounded up to the nearest integer ([UInt64](../../sql-reference/data-types/int-uint.md)).
**Example**
```sql
SELECT
arrayJoin(['1 B', '1 KiB', '3 MB', '5.314 KiB']) AS readable_sizes,
parseReadableSize(readable_sizes) AS sizes;
```
```text
┌─readable_sizes─┬───sizes─┐
│ 1 B │ 1 │
│ 1 KiB │ 1024 │
│ 3 MB │ 3000000 │
│ 5.314 KiB │ 5442 │
└────────────────┴─────────┘
```
## parseReadableSizeOrNull
Given a string containing a byte size and `B`, `KiB`, `KB`, `MiB`, `MB`, etc. as a unit (i.e. [ISO/IEC 80000-13](https://en.wikipedia.org/wiki/ISO/IEC_80000) or decimal byte unit), this function returns the corresponding number of bytes.
If the function is unable to parse the input value, it returns `NULL`.
The inverse operations of this function are [formatReadableSize](#formatReadableSize) & [formatReadableDecimalSize](#formatReadableDecimalSize).
**Syntax**
```sql
parseReadableSizeOrNull(x)
```
**Arguments**
- `x` : Readable size with ISO/IEC 80000-13 or decimal byte unit ([String](../../sql-reference/data-types/string.md)).
**Returned value**
- Number of bytes, rounded up to the nearest integer, or NULL if unable to parse the input (Nullable([UInt64](../../sql-reference/data-types/int-uint.md))).
**Example**
```sql
SELECT
arrayJoin(['1 B', '1 KiB', '3 MB', '5.314 KiB', 'invalid']) AS readable_sizes,
parseReadableSizeOrNull(readable_sizes) AS sizes;
```
```text
┌─readable_sizes─┬───sizes─┐
│ 1 B │ 1 │
│ 1 KiB │ 1024 │
│ 3 MB │ 3000000 │
│ 5.314 KiB │ 5442 │
│ invalid │ ᴺᵁᴸᴸ │
└────────────────┴─────────┘
```
## parseReadableSizeOrZero
Given a string containing a byte size and `B`, `KiB`, `KB`, `MiB`, `MB`, etc. as a unit (i.e. [ISO/IEC 80000-13](https://en.wikipedia.org/wiki/ISO/IEC_80000) or decimal byte unit), this function returns the corresponding number of bytes. If the function is unable to parse the input value, it returns `0`.
The inverse operations of this function are [formatReadableSize](#formatReadableSize) & [formatReadableDecimalSize](#formatReadableDecimalSize).
**Syntax**
```sql
parseReadableSizeOrZero(x)
```
**Arguments**
- `x` : Readable size with ISO/IEC 80000-13 or decimal byte unit ([String](../../sql-reference/data-types/string.md)).
**Returned value**
- Number of bytes, rounded up to the nearest integer, or 0 if unable to parse the input ([UInt64](../../sql-reference/data-types/int-uint.md)).
**Example**
```sql
SELECT
arrayJoin(['1 B', '1 KiB', '3 MB', '5.314 KiB', 'invalid']) AS readable_sizes,
parseReadableSizeOrZero(readable_sizes) AS sizes;
```
```text
┌─readable_sizes─┬───sizes─┐
│ 1 B │ 1 │
│ 1 KiB │ 1024 │
│ 3 MB │ 3000000 │
│ 5.314 KiB │ 5442 │
│ invalid │ 0 │
└────────────────┴─────────┘
```
## parseTimeDelta
Parse a sequence of numbers followed by something resembling a time unit.