Module utils 

SQL Utility Functions

Structs

RecursiveUnnestRewriter 🔒

Enums

CheckColumnsMustReferenceAggregatePurpose 🔒

CheckColumnsSatisfyExprsPurpose 🔒

Constants

UNNEST_PLACEHOLDER

Functions

check_column_satisfies_expr 🔒

check_columns_satisfy_exprs 🔒

Determines if the set of Expr’s are a valid projection on the input Expr::Column’s.

extract_aliases 🔒

Returns mapping of each alias (String) to the expression (Expr) it is aliasing.

make_decimal_type 🔒

Returns a validated DataType for the specified precision and scale

normalize_ident 🔒

Normalize an owned identifier to a lowercase string, unless the identifier is quoted.

push_projection_dedupl 🔒

rebase_expr 🔒

Rebuilds an Expr as a projection on top of a collection of Expr’s.

resolve_aliases_to_exprs 🔒

Rebuilds an Expr with columns that refer to aliases replaced by the alias’ underlying Expr.

resolve_columns 🔒

Make a best-effort attempt at resolving all columns in the expression tree

resolve_positions_to_exprs 🔒

Given an expression that’s literal int encoding position, lookup the corresponding expression in the select_exprs list, if the index is within the bounds and it is indeed a position literal, otherwise, returns planning error. If input expression is not an int literal, returns expression as-is.

rewrite_recursive_unnest_bottom_up 🔒

The context is we want to rewrite unnest() into InnerProjection->Unnest->OuterProjection Given an expression which contains unnest expr as one of its children, Try transform depends on unnest type

rewrite_recursive_unnests_bottom_up 🔒

value_to_string 🔒

window_expr_common_partition_keys

Given a slice of window expressions sharing the same sort key, find their common partition keys.