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[SPARK-34249][DOCS] Add documentation for ANSI implicit cast rules #33516

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[SPARK-34249][DOCS] Add documentation for ANSI implicit cast rules #33516

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cac6337
init doc for type coercion
srielau Jul 23, 2021
b06f413
revise doc
gengliangwang Jul 26, 2021
a2765cb
address comment
gengliangwang Jul 26, 2021
fd5ecce
reorg
gengliangwang Jul 27, 2021
f75359a
address comments
gengliangwang Jul 27, 2021
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@gengliangwang
gengliangwang committed Jul 26, 2021
commit a2765cb0b0c3517da5d700a9af64f3ac6058eef6
4 changes: 2 additions & 2 deletions docs/sql-ref-ansi-compliance.md
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Expand Up @@ -174,7 +174,7 @@ At the heart of this conflict resolution is the Type Precedence List which defin
| Decimal | Decimal -> Float* -> Double |
| Float | Float -> Double |
| Double | Double |
| Date | Date-> Timestamp |
| Date | Date -> Timestamp |
| Timestamp | Timestamp |
| String | String |
| Binary | Binary |
Expand All @@ -199,7 +199,7 @@ The least common type from a set of types is the narrowest type reachable from t

The least common type resolution is used to:
- Decide whether a function expecting a parameter of a type can be invoked using an argument of a narrower type.
- Derive the argument type for functions which expect a shared argument type for multiple parameters, such as coalesce, least, or greatest.
- Derive the argument type for functions which expect a shared argument type for multiple parameters, such as coalesce, least, or greatest.
- Derive the operand types for operators such as arithmetic operations or comparisons.
- Derive the result type for expressions such as the case expression.
- Derive the element, key, or value types for array and map constructors.
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