d 'PARQIT': module providing a grammar of data manipulation for Parquet files on an embedded DuckDB engine
d
d     parqit reads, writes, joins and manipulates columnar Parquet
d data with ordinary Stata verbs -- keep, drop, gen, replace,
d collapse, pivot, merge, append, sort, reshape -- that run out-of-core
d on an embedded DuckDB engine and materialise one result table
d at a time into Stata's memory, or write it straight back to
d Parquet without loading the result into Stata's current dataset.
d Variable labels, value labels,
d notes, display formats and characteristics survive a parqit save /
d parqit use round-trip through standard Parquet key-value metadata,
d while files remain plain Parquet for Python (pandas, polars), R,
d Spark and other tools. SQL is available as an escape hatch (parqit
d sql), and parqit show prints the generated query.
d
d KW: Parquet
d KW: DuckDB
d KW: out-of-core
d KW: big data
d KW: data management
d
d Requires: Stata version 16
d
d Distribution-Date: 20260908
d
d Author: Miguel Portela, Universidade do Minho & NIPE
d Support: email miguel.portela@@eeg.uminho.pt
d Author: Rute Costa, BPLIM / Banco de Portugal
d Support: email ricosta@@bportugal.pt
d Author: Paulo Guimarães, BPLIM / Banco de Portugal
d Support: email pfguimaraes@@bportugal.pt
d Author: Marta Silva, BPLIM / Banco de Portugal
d Support: email msilva@bportugal.pt
d
f parqit.ado
f parqit.sthlp
f parqit_technical.sthlp
f parqit_basics.do
f parqit_tour.do
f parqit_read.dlg
f parqit_explore.dlg
f parqit_stats.dlg
f parqit_filter.dlg
f parqit_vars.dlg
f parqit_gen.dlg
f parqit_pivot.dlg
f parqit_combine.dlg
f parqit_write.dlg
f parqit_views.dlg
f parqit_openmp_license.txt
g LINUX64 parqit_linux64.plugin parqit.plugin
g MACINTEL64 parqit_macintel64.plugin parqit.plugin
g OSX.X8664 parqit_macintel64.plugin parqit.plugin
g MACARM64 parqit_macarm64.plugin parqit.plugin
g OSX.ARM64 parqit_macarm64.plugin parqit.plugin
g WIN64 parqit_win64.plugin parqit.plugin
h parqit.plugin