.detect_type_mismatch

Checks if key columns have compatible types for joining.

internal

Provides diagnostic tools for understanding and debugging data frame
joins. Analyzes key columns before joining to detect duplicates, mismatches,
encoding issues, and other common problems. Explains unexpected row count
changes and provides safe join wrappers with cardinality enforcement. Concepts
and diagnostics build on tidy data principles as described in Wickham (2014)
<doi:10.18637/jss.v059.i10>.

Gilles Colling

joinspy

Diagnostic Tools for Data Frame Joins

.detect_type_mismatch function

<dl><dt>x_col</dt>
<dd>Column from left table.</dd>
<dt>y_col</dt>
<dd>Column from right table.</dd>
<dt>x_name</dt>
<dd>Name of left column.</dd>
<dt>y_name</dt>
<dd>Name of right column.</dd></dl>

Arguments

Detect Type Mismatches Between Key Columns — .detect_type_mismatch

<dl>

<dt>x_col</dt>
<dd>Column from left table.</dd>


<dt>y_col</dt>
<dd>Column from right table.</dd>


<dt>x_name</dt>
<dd>Name of left column.</dd>


<dt>y_name</dt>
<dd>Name of right column.</dd>

</dl>

.detect_type_mismatch: Detect Type Mismatches Between Key Columns

Description

Usage

Value

Arguments